0000831001FALSE12/312021Q3http://fasb.org/us-gaap/2021-01-31#AccountingStandardsUpdate201613Memberhttp://fasb.org/us-gaap/2021-01-31#ChangeInAccountingPrincipleOtherMember00008310012021-01-012021-09-30xbrli:shares00008310012021-09-30iso4217:USD00008310012021-07-012021-09-3000008310012020-07-012020-09-3000008310012020-01-012020-09-30iso4217:USDxbrli:shares00008310012020-12-310000831001us-gaap:EstimateOfFairValueFairValueDisclosureMember2021-09-300000831001us-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:CommercialPortfolioSegmentMember2021-09-300000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMember2020-12-310000831001us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2021-09-300000831001us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2020-12-310000831001us-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001us-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001us-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:CommercialPortfolioSegmentMember2021-09-300000831001us-gaap:VariableInterestEntityPrimaryBeneficiaryMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310000831001us-gaap:PreferredStockMember2021-06-300000831001us-gaap:PreferredStockMember2020-06-300000831001us-gaap:PreferredStockMember2020-12-310000831001us-gaap:PreferredStockMember2019-12-310000831001us-gaap:PreferredStockMember2021-01-012021-09-300000831001us-gaap:PreferredStockMember2020-01-012020-09-300000831001us-gaap:PreferredStockMember2021-09-300000831001us-gaap:PreferredStockMember2020-09-300000831001us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2021-06-300000831001us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2020-06-300000831001us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2020-12-310000831001us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2019-12-310000831001us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2021-07-012021-09-300000831001us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2020-07-012020-09-300000831001us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2021-01-012021-09-300000831001us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2020-01-012020-09-300000831001us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2021-09-300000831001us-gaap:CommonStockIncludingAdditionalPaidInCapitalMember2020-09-300000831001us-gaap:RetainedEarningsMember2021-06-300000831001us-gaap:RetainedEarningsMember2020-06-300000831001us-gaap:RetainedEarningsMember2020-12-310000831001us-gaap:RetainedEarningsMember2019-12-3100008310012019-01-012019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:RetainedEarningsMember2019-12-310000831001us-gaap:RetainedEarningsMembersrt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember2019-12-310000831001us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2021-06-300000831001us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-06-300000831001us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-12-310000831001us-gaap:RetainedEarningsMembersrt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-12-310000831001us-gaap:RetainedEarningsMember2021-07-012021-09-300000831001us-gaap:RetainedEarningsMember2020-07-012020-09-300000831001us-gaap:RetainedEarningsMember2021-01-012021-09-300000831001us-gaap:RetainedEarningsMember2020-01-012020-09-300000831001us-gaap:RetainedEarningsMember2021-09-300000831001us-gaap:RetainedEarningsMember2020-09-300000831001us-gaap:TreasuryStockMember2021-06-300000831001us-gaap:TreasuryStockMember2020-06-300000831001us-gaap:TreasuryStockMember2020-12-310000831001us-gaap:TreasuryStockMember2019-12-310000831001us-gaap:TreasuryStockMember2021-07-012021-09-300000831001us-gaap:TreasuryStockMember2020-07-012020-09-300000831001us-gaap:TreasuryStockMember2021-01-012021-09-300000831001us-gaap:TreasuryStockMember2020-01-012020-09-300000831001us-gaap:TreasuryStockMember2021-09-300000831001us-gaap:TreasuryStockMember2020-09-300000831001us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-06-300000831001us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-06-300000831001us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-12-310000831001us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-12-310000831001us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-07-012021-09-300000831001us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-07-012020-09-300000831001us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-01-012021-09-300000831001us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-01-012020-09-300000831001us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-09-300000831001us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-09-300000831001c:CommonShareholdersEquityMember2021-09-300000831001c:CommonShareholdersEquityMember2020-09-300000831001us-gaap:ParentMember2021-09-300000831001us-gaap:ParentMember2020-09-300000831001us-gaap:NoncontrollingInterestMember2021-06-300000831001us-gaap:NoncontrollingInterestMember2020-06-300000831001us-gaap:NoncontrollingInterestMember2020-12-310000831001us-gaap:NoncontrollingInterestMember2019-12-310000831001us-gaap:NoncontrollingInterestMember2021-07-012021-09-300000831001us-gaap:NoncontrollingInterestMember2021-01-012021-09-300000831001us-gaap:NoncontrollingInterestMember2020-01-012020-09-300000831001us-gaap:NoncontrollingInterestMember2020-07-012020-09-300000831001us-gaap:NoncontrollingInterestMember2021-09-300000831001us-gaap:NoncontrollingInterestMember2020-09-3000008310012020-09-3000008310012021-01-012021-03-3100008310012020-04-012020-06-3000008310012020-01-012020-03-3100008310012021-04-012021-06-3000008310012019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-01-01xbrli:pure00008310012020-01-012020-01-010000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-01-012020-01-010000831001us-gaap:AccountingStandardsUpdate201613Member2020-01-012020-01-010000831001c:AccountingGuidancePriorToAdoptionOfAccountingStandardsUpdate201613Member2020-01-012020-01-010000831001srt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember2020-01-010000831001srt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember2020-01-012020-03-310000831001srt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember2020-04-012020-06-300000831001srt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember2020-07-012020-09-300000831001us-gaap:DiscontinuedOperationsHeldforsaleMemberc:AustraliaConsumerBankingBusinessMember2021-07-012021-09-300000831001us-gaap:DiscontinuedOperationsHeldforsaleMemberc:AustraliaConsumerBankingBusinessMember2020-07-012020-09-300000831001us-gaap:DiscontinuedOperationsHeldforsaleMemberc:AustraliaConsumerBankingBusinessMember2021-01-012021-09-300000831001us-gaap:DiscontinuedOperationsHeldforsaleMemberc:AustraliaConsumerBankingBusinessMember2020-01-012020-09-300000831001us-gaap:DiscontinuedOperationsHeldforsaleMemberc:AustraliaConsumerBankingBusinessMember2021-09-300000831001srt:MinimumMemberc:CitibankKoreaIncMemberus-gaap:EmployeeSeveranceMembersrt:ScenarioForecastMember2021-10-012022-12-310000831001c:CitibankKoreaIncMembersrt:MaximumMemberus-gaap:EmployeeSeveranceMembersrt:ScenarioForecastMember2021-10-012022-12-31c:segment0000831001c:GlobalConsumerBankingMemberus-gaap:OperatingSegmentsMember2021-07-012021-09-300000831001c:GlobalConsumerBankingMemberus-gaap:OperatingSegmentsMember2020-07-012020-09-300000831001c:GlobalConsumerBankingMemberus-gaap:OperatingSegmentsMember2021-09-300000831001c:GlobalConsumerBankingMemberus-gaap:OperatingSegmentsMember2020-12-310000831001c:InstitutionalClientsGroupMemberus-gaap:OperatingSegmentsMember2021-07-012021-09-300000831001c:InstitutionalClientsGroupMemberus-gaap:OperatingSegmentsMember2020-07-012020-09-300000831001c:InstitutionalClientsGroupMemberus-gaap:OperatingSegmentsMember2021-09-300000831001c:InstitutionalClientsGroupMemberus-gaap:OperatingSegmentsMember2020-12-310000831001us-gaap:CorporateNonSegmentMember2021-07-012021-09-300000831001us-gaap:CorporateNonSegmentMember2020-07-012020-09-300000831001us-gaap:CorporateNonSegmentMember2021-09-300000831001us-gaap:CorporateNonSegmentMember2020-12-310000831001c:GlobalConsumerBankingMemberus-gaap:OperatingSegmentsMember2021-01-012021-09-300000831001c:GlobalConsumerBankingMemberus-gaap:OperatingSegmentsMember2020-01-012020-09-300000831001c:InstitutionalClientsGroupMemberus-gaap:OperatingSegmentsMember2021-01-012021-09-300000831001c:InstitutionalClientsGroupMemberus-gaap:OperatingSegmentsMember2020-01-012020-09-300000831001us-gaap:CorporateNonSegmentMember2021-01-012021-09-300000831001us-gaap:CorporateNonSegmentMember2020-01-012020-09-300000831001c:CiticorpSegmentMemberus-gaap:OperatingSegmentsMembersrt:NorthAmericaMember2021-07-012021-09-300000831001c:CiticorpSegmentMemberus-gaap:OperatingSegmentsMembersrt:NorthAmericaMember2020-07-012020-09-300000831001c:CiticorpSegmentMemberus-gaap:EMEAMemberus-gaap:OperatingSegmentsMember2021-07-012021-09-300000831001c:CiticorpSegmentMemberus-gaap:EMEAMemberus-gaap:OperatingSegmentsMember2020-07-012020-09-300000831001c:CiticorpSegmentMembersrt:LatinAmericaMemberus-gaap:OperatingSegmentsMember2021-07-012021-09-300000831001c:CiticorpSegmentMembersrt:LatinAmericaMemberus-gaap:OperatingSegmentsMember2020-07-012020-09-300000831001c:CiticorpSegmentMembersrt:AsiaMemberus-gaap:OperatingSegmentsMember2021-07-012021-09-300000831001c:CiticorpSegmentMembersrt:AsiaMemberus-gaap:OperatingSegmentsMember2020-07-012020-09-300000831001c:CiticorpSegmentMemberus-gaap:OperatingSegmentsMembersrt:NorthAmericaMember2021-01-012021-09-300000831001c:CiticorpSegmentMemberus-gaap:OperatingSegmentsMembersrt:NorthAmericaMember2020-01-012020-09-300000831001c:CiticorpSegmentMemberus-gaap:EMEAMemberus-gaap:OperatingSegmentsMember2021-01-012021-09-300000831001c:CiticorpSegmentMemberus-gaap:EMEAMemberus-gaap:OperatingSegmentsMember2020-01-012020-09-300000831001c:CiticorpSegmentMembersrt:LatinAmericaMemberus-gaap:OperatingSegmentsMember2021-01-012021-09-300000831001c:CiticorpSegmentMembersrt:LatinAmericaMemberus-gaap:OperatingSegmentsMember2020-01-012020-09-300000831001c:CiticorpSegmentMembersrt:AsiaMemberus-gaap:OperatingSegmentsMember2021-01-012021-09-300000831001c:CiticorpSegmentMembersrt:AsiaMemberus-gaap:OperatingSegmentsMember2020-01-012020-09-300000831001c:InvestmentBankingMemberc:InstitutionalClientsGroupMember2021-07-012021-09-300000831001c:InvestmentBankingMemberc:GlobalConsumerBankingMember2021-07-012021-09-300000831001c:InvestmentBankingMemberus-gaap:CorporateAndOtherMember2021-07-012021-09-300000831001c:InvestmentBankingMember2021-07-012021-09-300000831001c:InvestmentBankingMemberc:InstitutionalClientsGroupMember2021-01-012021-09-300000831001c:InvestmentBankingMemberc:GlobalConsumerBankingMember2021-01-012021-09-300000831001c:InvestmentBankingMemberus-gaap:CorporateAndOtherMember2021-01-012021-09-300000831001c:InvestmentBankingMember2021-01-012021-09-300000831001c:InstitutionalClientsGroupMemberc:BrokerageCommissionsMember2021-07-012021-09-300000831001c:GlobalConsumerBankingMemberc:BrokerageCommissionsMember2021-07-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:BrokerageCommissionsMember2021-07-012021-09-300000831001c:BrokerageCommissionsMember2021-07-012021-09-300000831001c:InstitutionalClientsGroupMemberc:BrokerageCommissionsMember2021-01-012021-09-300000831001c:GlobalConsumerBankingMemberc:BrokerageCommissionsMember2021-01-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:BrokerageCommissionsMember2021-01-012021-09-300000831001c:BrokerageCommissionsMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberc:InstitutionalClientsGroupMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberc:GlobalConsumerBankingMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberus-gaap:CorporateAndOtherMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberc:InstitutionalClientsGroupMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberc:GlobalConsumerBankingMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberus-gaap:CorporateAndOtherMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberc:InstitutionalClientsGroupMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberc:GlobalConsumerBankingMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberus-gaap:CorporateAndOtherMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberc:InstitutionalClientsGroupMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberc:GlobalConsumerBankingMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberus-gaap:CorporateAndOtherMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberc:InstitutionalClientsGroupMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberc:GlobalConsumerBankingMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberus-gaap:CorporateAndOtherMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMember2021-07-012021-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberc:InstitutionalClientsGroupMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberc:GlobalConsumerBankingMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberus-gaap:CorporateAndOtherMember2021-01-012021-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMember2021-01-012021-09-300000831001c:DepositRelatedFeesMemberc:InstitutionalClientsGroupMember2021-07-012021-09-300000831001c:DepositRelatedFeesMemberc:GlobalConsumerBankingMember2021-07-012021-09-300000831001c:DepositRelatedFeesMemberus-gaap:CorporateAndOtherMember2021-07-012021-09-300000831001c:DepositRelatedFeesMember2021-07-012021-09-300000831001c:DepositRelatedFeesMemberc:InstitutionalClientsGroupMember2021-01-012021-09-300000831001c:DepositRelatedFeesMemberc:GlobalConsumerBankingMember2021-01-012021-09-300000831001c:DepositRelatedFeesMemberus-gaap:CorporateAndOtherMember2021-01-012021-09-300000831001c:DepositRelatedFeesMember2021-01-012021-09-300000831001c:InstitutionalClientsGroupMemberc:TransactionalServiceFeesMember2021-07-012021-09-300000831001c:GlobalConsumerBankingMemberc:TransactionalServiceFeesMember2021-07-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:TransactionalServiceFeesMember2021-07-012021-09-300000831001c:TransactionalServiceFeesMember2021-07-012021-09-300000831001c:InstitutionalClientsGroupMemberc:TransactionalServiceFeesMember2021-01-012021-09-300000831001c:GlobalConsumerBankingMemberc:TransactionalServiceFeesMember2021-01-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:TransactionalServiceFeesMember2021-01-012021-09-300000831001c:TransactionalServiceFeesMember2021-01-012021-09-300000831001c:InstitutionalClientsGroupMemberc:CorporateFinanceMember2021-07-012021-09-300000831001c:CorporateFinanceMemberc:GlobalConsumerBankingMember2021-07-012021-09-300000831001c:CorporateFinanceMemberus-gaap:CorporateAndOtherMember2021-07-012021-09-300000831001c:CorporateFinanceMember2021-07-012021-09-300000831001c:InstitutionalClientsGroupMemberc:CorporateFinanceMember2021-01-012021-09-300000831001c:CorporateFinanceMemberc:GlobalConsumerBankingMember2021-01-012021-09-300000831001c:CorporateFinanceMemberus-gaap:CorporateAndOtherMember2021-01-012021-09-300000831001c:CorporateFinanceMember2021-01-012021-09-300000831001c:InsuranceDistributionRevenueMemberc:InstitutionalClientsGroupMember2021-07-012021-09-300000831001c:InsuranceDistributionRevenueMemberc:GlobalConsumerBankingMember2021-07-012021-09-300000831001c:InsuranceDistributionRevenueMemberus-gaap:CorporateAndOtherMember2021-07-012021-09-300000831001c:InsuranceDistributionRevenueMember2021-07-012021-09-300000831001c:InsuranceDistributionRevenueMemberc:InstitutionalClientsGroupMember2021-01-012021-09-300000831001c:InsuranceDistributionRevenueMemberc:GlobalConsumerBankingMember2021-01-012021-09-300000831001c:InsuranceDistributionRevenueMemberus-gaap:CorporateAndOtherMember2021-01-012021-09-300000831001c:InsuranceDistributionRevenueMember2021-01-012021-09-300000831001c:InstitutionalClientsGroupMemberc:InsurancePremiumsMember2021-07-012021-09-300000831001c:GlobalConsumerBankingMemberc:InsurancePremiumsMember2021-07-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:InsurancePremiumsMember2021-07-012021-09-300000831001c:InsurancePremiumsMember2021-07-012021-09-300000831001c:InstitutionalClientsGroupMemberc:InsurancePremiumsMember2021-01-012021-09-300000831001c:GlobalConsumerBankingMemberc:InsurancePremiumsMember2021-01-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:InsurancePremiumsMember2021-01-012021-09-300000831001c:InsurancePremiumsMember2021-01-012021-09-300000831001c:InstitutionalClientsGroupMemberc:LoanServicingMember2021-07-012021-09-300000831001c:GlobalConsumerBankingMemberc:LoanServicingMember2021-07-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:LoanServicingMember2021-07-012021-09-300000831001c:LoanServicingMember2021-07-012021-09-300000831001c:InstitutionalClientsGroupMemberc:LoanServicingMember2021-01-012021-09-300000831001c:GlobalConsumerBankingMemberc:LoanServicingMember2021-01-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:LoanServicingMember2021-01-012021-09-300000831001c:LoanServicingMember2021-01-012021-09-300000831001c:InstitutionalClientsGroupMemberc:OtherProductsAndServicesMember2021-07-012021-09-300000831001c:GlobalConsumerBankingMemberc:OtherProductsAndServicesMember2021-07-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:OtherProductsAndServicesMember2021-07-012021-09-300000831001c:OtherProductsAndServicesMember2021-07-012021-09-300000831001c:InstitutionalClientsGroupMemberc:OtherProductsAndServicesMember2021-01-012021-09-300000831001c:GlobalConsumerBankingMemberc:OtherProductsAndServicesMember2021-01-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:OtherProductsAndServicesMember2021-01-012021-09-300000831001c:OtherProductsAndServicesMember2021-01-012021-09-300000831001c:InstitutionalClientsGroupMember2021-07-012021-09-300000831001c:GlobalConsumerBankingMember2021-07-012021-09-300000831001us-gaap:CorporateAndOtherMember2021-07-012021-09-300000831001c:InstitutionalClientsGroupMember2021-01-012021-09-300000831001c:GlobalConsumerBankingMember2021-01-012021-09-300000831001us-gaap:CorporateAndOtherMember2021-01-012021-09-300000831001c:InvestmentBankingMemberc:InstitutionalClientsGroupMember2020-07-012020-09-300000831001c:InvestmentBankingMemberc:GlobalConsumerBankingMember2020-07-012020-09-300000831001c:InvestmentBankingMemberus-gaap:CorporateAndOtherMember2020-07-012020-09-300000831001c:InvestmentBankingMember2020-07-012020-09-300000831001c:InvestmentBankingMemberc:InstitutionalClientsGroupMember2020-01-012020-09-300000831001c:InvestmentBankingMemberc:GlobalConsumerBankingMember2020-01-012020-09-300000831001c:InvestmentBankingMemberus-gaap:CorporateAndOtherMember2020-01-012020-09-300000831001c:InvestmentBankingMember2020-01-012020-09-300000831001c:InstitutionalClientsGroupMemberc:BrokerageCommissionsMember2020-07-012020-09-300000831001c:GlobalConsumerBankingMemberc:BrokerageCommissionsMember2020-07-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:BrokerageCommissionsMember2020-07-012020-09-300000831001c:BrokerageCommissionsMember2020-07-012020-09-300000831001c:InstitutionalClientsGroupMemberc:BrokerageCommissionsMember2020-01-012020-09-300000831001c:GlobalConsumerBankingMemberc:BrokerageCommissionsMember2020-01-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:BrokerageCommissionsMember2020-01-012020-09-300000831001c:BrokerageCommissionsMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberc:InstitutionalClientsGroupMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberc:GlobalConsumerBankingMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberus-gaap:CorporateAndOtherMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberc:InstitutionalClientsGroupMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberc:GlobalConsumerBankingMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMemberus-gaap:CorporateAndOtherMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeInterchangeFeesMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberc:InstitutionalClientsGroupMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberc:GlobalConsumerBankingMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberus-gaap:CorporateAndOtherMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberc:InstitutionalClientsGroupMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberc:GlobalConsumerBankingMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMemberus-gaap:CorporateAndOtherMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeCardRelatedLoanFeesMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberc:InstitutionalClientsGroupMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberc:GlobalConsumerBankingMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberus-gaap:CorporateAndOtherMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMember2020-07-012020-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberc:InstitutionalClientsGroupMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberc:GlobalConsumerBankingMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMemberus-gaap:CorporateAndOtherMember2020-01-012020-09-300000831001c:CreditAndBankCardIncomeCardRewardsAndPartnerPaymentsMember2020-01-012020-09-300000831001c:DepositRelatedFeesMemberc:InstitutionalClientsGroupMember2020-07-012020-09-300000831001c:DepositRelatedFeesMemberc:GlobalConsumerBankingMember2020-07-012020-09-300000831001c:DepositRelatedFeesMemberus-gaap:CorporateAndOtherMember2020-07-012020-09-300000831001c:DepositRelatedFeesMember2020-07-012020-09-300000831001c:DepositRelatedFeesMemberc:InstitutionalClientsGroupMember2020-01-012020-09-300000831001c:DepositRelatedFeesMemberc:GlobalConsumerBankingMember2020-01-012020-09-300000831001c:DepositRelatedFeesMemberus-gaap:CorporateAndOtherMember2020-01-012020-09-300000831001c:DepositRelatedFeesMember2020-01-012020-09-300000831001c:InstitutionalClientsGroupMemberc:TransactionalServiceFeesMember2020-07-012020-09-300000831001c:GlobalConsumerBankingMemberc:TransactionalServiceFeesMember2020-07-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:TransactionalServiceFeesMember2020-07-012020-09-300000831001c:TransactionalServiceFeesMember2020-07-012020-09-300000831001c:InstitutionalClientsGroupMemberc:TransactionalServiceFeesMember2020-01-012020-09-300000831001c:GlobalConsumerBankingMemberc:TransactionalServiceFeesMember2020-01-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:TransactionalServiceFeesMember2020-01-012020-09-300000831001c:TransactionalServiceFeesMember2020-01-012020-09-300000831001c:InstitutionalClientsGroupMemberc:CorporateFinanceMember2020-07-012020-09-300000831001c:CorporateFinanceMemberc:GlobalConsumerBankingMember2020-07-012020-09-300000831001c:CorporateFinanceMemberus-gaap:CorporateAndOtherMember2020-07-012020-09-300000831001c:CorporateFinanceMember2020-07-012020-09-300000831001c:InstitutionalClientsGroupMemberc:CorporateFinanceMember2020-01-012020-09-300000831001c:CorporateFinanceMemberc:GlobalConsumerBankingMember2020-01-012020-09-300000831001c:CorporateFinanceMemberus-gaap:CorporateAndOtherMember2020-01-012020-09-300000831001c:CorporateFinanceMember2020-01-012020-09-300000831001c:InsuranceDistributionRevenueMemberc:InstitutionalClientsGroupMember2020-07-012020-09-300000831001c:InsuranceDistributionRevenueMemberc:GlobalConsumerBankingMember2020-07-012020-09-300000831001c:InsuranceDistributionRevenueMemberus-gaap:CorporateAndOtherMember2020-07-012020-09-300000831001c:InsuranceDistributionRevenueMember2020-07-012020-09-300000831001c:InsuranceDistributionRevenueMemberc:InstitutionalClientsGroupMember2020-01-012020-09-300000831001c:InsuranceDistributionRevenueMemberc:GlobalConsumerBankingMember2020-01-012020-09-300000831001c:InsuranceDistributionRevenueMemberus-gaap:CorporateAndOtherMember2020-01-012020-09-300000831001c:InsuranceDistributionRevenueMember2020-01-012020-09-300000831001c:InstitutionalClientsGroupMemberc:InsurancePremiumsMember2020-07-012020-09-300000831001c:GlobalConsumerBankingMemberc:InsurancePremiumsMember2020-07-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:InsurancePremiumsMember2020-07-012020-09-300000831001c:InsurancePremiumsMember2020-07-012020-09-300000831001c:InstitutionalClientsGroupMemberc:InsurancePremiumsMember2020-01-012020-09-300000831001c:GlobalConsumerBankingMemberc:InsurancePremiumsMember2020-01-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:InsurancePremiumsMember2020-01-012020-09-300000831001c:InsurancePremiumsMember2020-01-012020-09-300000831001c:InstitutionalClientsGroupMemberc:LoanServicingMember2020-07-012020-09-300000831001c:GlobalConsumerBankingMemberc:LoanServicingMember2020-07-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:LoanServicingMember2020-07-012020-09-300000831001c:LoanServicingMember2020-07-012020-09-300000831001c:InstitutionalClientsGroupMemberc:LoanServicingMember2020-01-012020-09-300000831001c:GlobalConsumerBankingMemberc:LoanServicingMember2020-01-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:LoanServicingMember2020-01-012020-09-300000831001c:LoanServicingMember2020-01-012020-09-300000831001c:InstitutionalClientsGroupMemberc:OtherProductsAndServicesMember2020-07-012020-09-300000831001c:GlobalConsumerBankingMemberc:OtherProductsAndServicesMember2020-07-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:OtherProductsAndServicesMember2020-07-012020-09-300000831001c:OtherProductsAndServicesMember2020-07-012020-09-300000831001c:InstitutionalClientsGroupMemberc:OtherProductsAndServicesMember2020-01-012020-09-300000831001c:GlobalConsumerBankingMemberc:OtherProductsAndServicesMember2020-01-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:OtherProductsAndServicesMember2020-01-012020-09-300000831001c:OtherProductsAndServicesMember2020-01-012020-09-300000831001c:InstitutionalClientsGroupMember2020-07-012020-09-300000831001c:GlobalConsumerBankingMember2020-07-012020-09-300000831001us-gaap:CorporateAndOtherMember2020-07-012020-09-300000831001c:InstitutionalClientsGroupMember2020-01-012020-09-300000831001c:GlobalConsumerBankingMember2020-01-012020-09-300000831001us-gaap:CorporateAndOtherMember2020-01-012020-09-300000831001c:DepositRelatedFeesBankOverdraftMember2021-07-012021-09-300000831001c:DepositRelatedFeesBankOverdraftMember2020-07-012020-09-300000831001c:DepositRelatedFeesBankOverdraftMember2021-01-012021-09-300000831001c:DepositRelatedFeesBankOverdraftMember2020-01-012020-09-300000831001c:CommissionsAndFeesMember2021-07-012021-09-300000831001c:CommissionsAndFeesMember2020-07-012020-09-300000831001c:CommissionsAndFeesMember2021-01-012021-09-300000831001c:CommissionsAndFeesMember2020-01-012020-09-300000831001c:CustodyFeesMemberc:InstitutionalClientsGroupMember2021-07-012021-09-300000831001c:CustodyFeesMemberc:GlobalConsumerBankingMember2021-07-012021-09-300000831001c:CustodyFeesMemberus-gaap:CorporateAndOtherMember2021-07-012021-09-300000831001c:CustodyFeesMember2021-07-012021-09-300000831001c:CustodyFeesMemberc:InstitutionalClientsGroupMember2021-01-012021-09-300000831001c:CustodyFeesMemberc:GlobalConsumerBankingMember2021-01-012021-09-300000831001c:CustodyFeesMemberus-gaap:CorporateAndOtherMember2021-01-012021-09-300000831001c:CustodyFeesMember2021-01-012021-09-300000831001c:FiduciaryFeesMemberc:InstitutionalClientsGroupMember2021-07-012021-09-300000831001c:FiduciaryFeesMemberc:GlobalConsumerBankingMember2021-07-012021-09-300000831001c:FiduciaryFeesMemberus-gaap:CorporateAndOtherMember2021-07-012021-09-300000831001c:FiduciaryFeesMember2021-07-012021-09-300000831001c:FiduciaryFeesMemberc:InstitutionalClientsGroupMember2021-01-012021-09-300000831001c:FiduciaryFeesMemberc:GlobalConsumerBankingMember2021-01-012021-09-300000831001c:FiduciaryFeesMemberus-gaap:CorporateAndOtherMember2021-01-012021-09-300000831001c:FiduciaryFeesMember2021-01-012021-09-300000831001c:InstitutionalClientsGroupMemberc:GuaranteeFeesMember2021-07-012021-09-300000831001c:GuaranteeFeesMemberc:GlobalConsumerBankingMember2021-07-012021-09-300000831001c:GuaranteeFeesMemberus-gaap:CorporateAndOtherMember2021-07-012021-09-300000831001c:GuaranteeFeesMember2021-07-012021-09-300000831001c:InstitutionalClientsGroupMemberc:GuaranteeFeesMember2021-01-012021-09-300000831001c:GuaranteeFeesMemberc:GlobalConsumerBankingMember2021-01-012021-09-300000831001c:GuaranteeFeesMemberus-gaap:CorporateAndOtherMember2021-01-012021-09-300000831001c:GuaranteeFeesMember2021-01-012021-09-300000831001c:InstitutionalClientsGroupMemberc:AdministrationAndOtherFiduciaryFeesMember2021-07-012021-09-300000831001c:GlobalConsumerBankingMemberc:AdministrationAndOtherFiduciaryFeesMember2021-07-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:AdministrationAndOtherFiduciaryFeesMember2021-07-012021-09-300000831001c:AdministrationAndOtherFiduciaryFeesMember2021-07-012021-09-300000831001c:InstitutionalClientsGroupMemberc:AdministrationAndOtherFiduciaryFeesMember2021-01-012021-09-300000831001c:GlobalConsumerBankingMemberc:AdministrationAndOtherFiduciaryFeesMember2021-01-012021-09-300000831001us-gaap:CorporateAndOtherMemberc:AdministrationAndOtherFiduciaryFeesMember2021-01-012021-09-300000831001c:AdministrationAndOtherFiduciaryFeesMember2021-01-012021-09-300000831001c:CustodyFeesMemberc:InstitutionalClientsGroupMember2020-07-012020-09-300000831001c:CustodyFeesMemberc:GlobalConsumerBankingMember2020-07-012020-09-300000831001c:CustodyFeesMemberus-gaap:CorporateAndOtherMember2020-07-012020-09-300000831001c:CustodyFeesMember2020-07-012020-09-300000831001c:CustodyFeesMemberc:InstitutionalClientsGroupMember2020-01-012020-09-300000831001c:CustodyFeesMemberc:GlobalConsumerBankingMember2020-01-012020-09-300000831001c:CustodyFeesMemberus-gaap:CorporateAndOtherMember2020-01-012020-09-300000831001c:CustodyFeesMember2020-01-012020-09-300000831001c:FiduciaryFeesMemberc:InstitutionalClientsGroupMember2020-07-012020-09-300000831001c:FiduciaryFeesMemberc:GlobalConsumerBankingMember2020-07-012020-09-300000831001c:FiduciaryFeesMemberus-gaap:CorporateAndOtherMember2020-07-012020-09-300000831001c:FiduciaryFeesMember2020-07-012020-09-300000831001c:FiduciaryFeesMemberc:InstitutionalClientsGroupMember2020-01-012020-09-300000831001c:FiduciaryFeesMemberc:GlobalConsumerBankingMember2020-01-012020-09-300000831001c:FiduciaryFeesMemberus-gaap:CorporateAndOtherMember2020-01-012020-09-300000831001c:FiduciaryFeesMember2020-01-012020-09-300000831001c:InstitutionalClientsGroupMemberc:GuaranteeFeesMember2020-07-012020-09-300000831001c:GuaranteeFeesMemberc:GlobalConsumerBankingMember2020-07-012020-09-300000831001c:GuaranteeFeesMemberus-gaap:CorporateAndOtherMember2020-07-012020-09-300000831001c:GuaranteeFeesMember2020-07-012020-09-300000831001c:InstitutionalClientsGroupMemberc:GuaranteeFeesMember2020-01-012020-09-300000831001c:GuaranteeFeesMemberc:GlobalConsumerBankingMember2020-01-012020-09-300000831001c:GuaranteeFeesMemberus-gaap:CorporateAndOtherMember2020-01-012020-09-300000831001c:GuaranteeFeesMember2020-01-012020-09-300000831001c:InstitutionalClientsGroupMemberc:AdministrationAndOtherFiduciaryFeesMember2020-07-012020-09-300000831001c:GlobalConsumerBankingMemberc:AdministrationAndOtherFiduciaryFeesMember2020-07-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:AdministrationAndOtherFiduciaryFeesMember2020-07-012020-09-300000831001c:AdministrationAndOtherFiduciaryFeesMember2020-07-012020-09-300000831001c:InstitutionalClientsGroupMemberc:AdministrationAndOtherFiduciaryFeesMember2020-01-012020-09-300000831001c:GlobalConsumerBankingMemberc:AdministrationAndOtherFiduciaryFeesMember2020-01-012020-09-300000831001us-gaap:CorporateAndOtherMemberc:AdministrationAndOtherFiduciaryFeesMember2020-01-012020-09-300000831001c:AdministrationAndOtherFiduciaryFeesMember2020-01-012020-09-300000831001us-gaap:InterestRateContractMember2021-07-012021-09-300000831001us-gaap:InterestRateContractMember2020-07-012020-09-300000831001us-gaap:InterestRateContractMember2021-01-012021-09-300000831001us-gaap:InterestRateContractMember2020-01-012020-09-300000831001us-gaap:ForeignExchangeContractMember2021-07-012021-09-300000831001us-gaap:ForeignExchangeContractMember2020-07-012020-09-300000831001us-gaap:ForeignExchangeContractMember2021-01-012021-09-300000831001us-gaap:ForeignExchangeContractMember2020-01-012020-09-300000831001us-gaap:EquityContractMember2021-07-012021-09-300000831001us-gaap:EquityContractMember2020-07-012020-09-300000831001us-gaap:EquityContractMember2021-01-012021-09-300000831001us-gaap:EquityContractMember2020-01-012020-09-300000831001c:CommodityAndOtherContractsMember2021-07-012021-09-300000831001c:CommodityAndOtherContractsMember2020-07-012020-09-300000831001c:CommodityAndOtherContractsMember2021-01-012021-09-300000831001c:CommodityAndOtherContractsMember2020-01-012020-09-300000831001us-gaap:CreditRiskContractMember2021-07-012021-09-300000831001us-gaap:CreditRiskContractMember2020-07-012020-09-300000831001us-gaap:CreditRiskContractMember2021-01-012021-09-300000831001us-gaap:CreditRiskContractMember2020-01-012020-09-300000831001us-gaap:PensionPlansDefinedBenefitMembercountry:US2021-07-012021-09-300000831001us-gaap:PensionPlansDefinedBenefitMembercountry:US2020-07-012020-09-300000831001us-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-07-012021-09-300000831001us-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-07-012020-09-300000831001country:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-07-012021-09-300000831001country:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-07-012020-09-300000831001us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-07-012021-09-300000831001us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-07-012020-09-300000831001us-gaap:PensionPlansDefinedBenefitMembercountry:US2021-01-012021-09-300000831001us-gaap:PensionPlansDefinedBenefitMembercountry:US2020-01-012020-09-300000831001us-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-01-012021-09-300000831001us-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-01-012020-09-300000831001country:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-01-012021-09-300000831001country:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-01-012020-09-300000831001us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-01-012021-09-300000831001us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-01-012020-09-300000831001us-gaap:PensionPlansDefinedBenefitMembercountry:US2020-12-310000831001us-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-12-310000831001country:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000831001us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-12-310000831001country:USus-gaap:PensionPlansDefinedBenefitMemberc:OtherThanSignificantPlansMeasuredAnnuallyMember2020-12-310000831001us-gaap:PensionPlansDefinedBenefitMemberc:OtherThanSignificantPlansMeasuredAnnuallyMemberus-gaap:ForeignPlanMember2020-12-310000831001country:USc:OtherThanSignificantPlansMeasuredAnnuallyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000831001c:OtherThanSignificantPlansMeasuredAnnuallyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-12-310000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:PensionPlansDefinedBenefitMember2020-12-310000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-12-310000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-12-310000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:PensionPlansDefinedBenefitMember2021-01-012021-03-310000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-01-012021-03-310000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-01-012021-03-310000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-01-012021-03-310000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:PensionPlansDefinedBenefitMember2021-04-012021-06-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-04-012021-06-300000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-04-012021-06-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-04-012021-06-300000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:PensionPlansDefinedBenefitMember2021-06-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-06-300000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-06-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-06-300000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:PensionPlansDefinedBenefitMember2021-07-012021-09-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-07-012021-09-300000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-07-012021-09-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-07-012021-09-300000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:PensionPlansDefinedBenefitMember2021-09-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-09-300000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-09-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-09-300000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:QualifiedPlanMember2021-09-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:QualifiedPlanMemberus-gaap:ForeignPlanMember2021-09-300000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:QualifiedPlanMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-09-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:QualifiedPlanMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-09-300000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:NonqualifiedPlanMember2021-09-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:NonqualifiedPlanMemberus-gaap:ForeignPlanMember2021-09-300000831001c:SignificantPlansMeasuredQuarterlyMembercountry:USus-gaap:NonqualifiedPlanMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-09-300000831001c:SignificantPlansMeasuredQuarterlyMemberus-gaap:NonqualifiedPlanMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-09-300000831001us-gaap:PensionPlansDefinedBenefitMembercountry:US2021-09-300000831001us-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-09-300000831001country:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-09-300000831001us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-06-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-12-310000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-07-012021-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-01-012021-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2021-09-300000831001country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:QualifiedPlanMember2021-07-012021-09-300000831001country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:QualifiedPlanMember2020-07-012020-09-300000831001country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:NonqualifiedPlanMember2021-07-012021-09-300000831001country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:NonqualifiedPlanMember2020-07-012020-09-300000831001srt:MinimumMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-07-012021-09-300000831001us-gaap:PensionPlansDefinedBenefitMembersrt:MaximumMemberus-gaap:ForeignPlanMember2021-07-012021-09-300000831001srt:MinimumMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-07-012020-09-300000831001us-gaap:PensionPlansDefinedBenefitMembersrt:MaximumMemberus-gaap:ForeignPlanMember2020-07-012020-09-300000831001us-gaap:PensionPlansDefinedBenefitMembersrt:WeightedAverageMemberus-gaap:ForeignPlanMember2021-07-012021-09-300000831001us-gaap:PensionPlansDefinedBenefitMembersrt:WeightedAverageMemberus-gaap:ForeignPlanMember2020-07-012020-09-300000831001country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:QualifiedPlanMember2021-09-300000831001country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:QualifiedPlanMember2021-06-300000831001country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:QualifiedPlanMember2021-03-310000831001country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:NonqualifiedPlanMember2021-09-300000831001country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:NonqualifiedPlanMember2021-06-300000831001country:USus-gaap:PensionPlansDefinedBenefitMemberus-gaap:NonqualifiedPlanMember2021-03-310000831001country:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-06-300000831001country:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-03-310000831001srt:MinimumMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-09-300000831001us-gaap:PensionPlansDefinedBenefitMembersrt:MaximumMemberus-gaap:ForeignPlanMember2021-09-300000831001srt:MinimumMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-06-300000831001us-gaap:PensionPlansDefinedBenefitMembersrt:MaximumMemberus-gaap:ForeignPlanMember2021-06-300000831001srt:MinimumMemberus-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-03-310000831001us-gaap:PensionPlansDefinedBenefitMembersrt:MaximumMemberus-gaap:ForeignPlanMember2021-03-310000831001us-gaap:PensionPlansDefinedBenefitMembersrt:WeightedAverageMemberus-gaap:ForeignPlanMember2021-09-300000831001us-gaap:PensionPlansDefinedBenefitMembersrt:WeightedAverageMemberus-gaap:ForeignPlanMember2021-06-300000831001us-gaap:PensionPlansDefinedBenefitMembersrt:WeightedAverageMemberus-gaap:ForeignPlanMember2021-03-310000831001us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-06-300000831001us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2021-03-310000831001us-gaap:PensionPlansDefinedBenefitMembercountry:US2020-09-300000831001us-gaap:PensionPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-09-300000831001country:USus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-09-300000831001us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ForeignPlanMember2020-09-300000831001us-gaap:PostemploymentRetirementBenefitsMember2021-07-012021-09-300000831001us-gaap:PostemploymentRetirementBenefitsMember2020-07-012020-09-300000831001us-gaap:PostemploymentRetirementBenefitsMember2021-01-012021-09-300000831001us-gaap:PostemploymentRetirementBenefitsMember2020-01-012020-09-300000831001us-gaap:PreferredStockMembersrt:ScenarioForecastMember2021-10-012021-12-310000831001c:SeriesYPreferredStockMemberus-gaap:SubsequentEventMemberus-gaap:PreferredStockMember2021-10-272021-10-270000831001c:SeriesQPreferredStockMemberus-gaap:PreferredStockMember2021-04-012021-06-300000831001c:SeriesRPreferredStockMemberus-gaap:PreferredStockMember2021-04-012021-06-300000831001c:SeriesSPreferredStockMemberus-gaap:PreferredStockMember2021-01-012021-03-310000831001c:SeriesRPreferredStockMemberus-gaap:PreferredStockMember2021-01-012021-03-310000831001us-gaap:PreferredStockMemberc:SeriesXPreferredStockMember2021-01-012021-03-310000831001us-gaap:MaturityOvernightAndOnDemandMember2021-09-300000831001us-gaap:MaturityUpTo30DaysMember2021-09-300000831001c:Maturity31to90DaysMember2021-09-300000831001us-gaap:MaturityOver90DaysMember2021-09-300000831001us-gaap:MaturityOvernightAndOnDemandMember2020-12-310000831001us-gaap:MaturityUpTo30DaysMember2020-12-310000831001c:Maturity31to90DaysMember2020-12-310000831001us-gaap:MaturityOver90DaysMember2020-12-310000831001us-gaap:USTreasuryAndGovernmentMember2021-09-300000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2021-09-300000831001us-gaap:CorporateDebtSecuritiesMember2021-09-300000831001us-gaap:EquitySecuritiesMember2021-09-300000831001us-gaap:MortgageBackedSecuritiesMember2021-09-300000831001us-gaap:AssetBackedSecuritiesMember2021-09-300000831001us-gaap:OtherDebtSecuritiesMember2021-09-300000831001us-gaap:USTreasuryAndGovernmentMember2020-12-310000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2020-12-310000831001us-gaap:CorporateDebtSecuritiesMember2020-12-310000831001us-gaap:EquitySecuritiesMember2020-12-310000831001us-gaap:MortgageBackedSecuritiesMember2020-12-310000831001us-gaap:AssetBackedSecuritiesMember2020-12-310000831001us-gaap:OtherDebtSecuritiesMember2020-12-310000831001us-gaap:AvailableforsaleSecuritiesMember2021-09-300000831001us-gaap:AvailableforsaleSecuritiesMember2020-12-310000831001us-gaap:HeldtomaturitySecuritiesMember2021-09-300000831001us-gaap:HeldtomaturitySecuritiesMember2020-12-310000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberc:MarketableEquitySecuritiesMember2021-09-300000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberc:MarketableEquitySecuritiesMember2020-12-310000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberc:NonMarketableEquitySecuritiesMember2021-09-300000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberc:NonMarketableEquitySecuritiesMember2020-12-310000831001c:NonMarketableSecuritiesMeasuredUsingMeasurementAlternativeMember2021-09-300000831001c:NonMarketableSecuritiesMeasuredUsingMeasurementAlternativeMember2020-12-310000831001c:NonMarketableEquitySecuritiesMemberus-gaap:PortionAtOtherThanFairValueFairValueDisclosureMember2021-09-300000831001c:NonMarketableEquitySecuritiesMemberus-gaap:PortionAtOtherThanFairValueFairValueDisclosureMember2020-12-310000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2021-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2020-12-310000831001c:ForeignResidentialMortgageBackedSecuritiesMember2021-09-300000831001c:ForeignResidentialMortgageBackedSecuritiesMember2020-12-310000831001us-gaap:CommercialMortgageBackedSecuritiesMember2021-09-300000831001us-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310000831001us-gaap:MortgageBackedSecuritiesMember2021-09-300000831001us-gaap:MortgageBackedSecuritiesMember2020-12-310000831001us-gaap:USTreasurySecuritiesMember2021-09-300000831001us-gaap:USTreasurySecuritiesMember2020-12-310000831001us-gaap:USGovernmentAgenciesDebtSecuritiesMember2021-09-300000831001us-gaap:USGovernmentAgenciesDebtSecuritiesMember2020-12-310000831001us-gaap:USTreasuryAndGovernmentMember2021-09-300000831001us-gaap:USTreasuryAndGovernmentMember2020-12-310000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2021-09-300000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2020-12-310000831001us-gaap:CorporateDebtSecuritiesMember2021-09-300000831001us-gaap:CorporateDebtSecuritiesMember2020-12-310000831001us-gaap:AssetBackedSecuritiesMember2021-09-300000831001us-gaap:AssetBackedSecuritiesMember2020-12-310000831001us-gaap:OtherDebtSecuritiesMember2021-09-300000831001us-gaap:OtherDebtSecuritiesMember2020-12-310000831001us-gaap:DebtSecuritiesMember2021-09-300000831001us-gaap:DebtSecuritiesMember2020-12-310000831001c:CorporateDebtAssetBackedAndOtherDebtSecuritiesMember2021-09-300000831001c:CorporateDebtAssetBackedAndOtherDebtSecuritiesMember2020-12-310000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2021-02-012021-02-280000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2021-02-280000831001us-gaap:USTreasurySecuritiesMember2020-08-012020-08-310000831001us-gaap:USTreasurySecuritiesMember2020-08-310000831001us-gaap:AvailableforsaleSecuritiesMember2021-07-012021-09-300000831001us-gaap:OtherAggregatedInvestmentsMember2021-07-012021-09-300000831001us-gaap:AvailableforsaleSecuritiesMember2020-07-012020-09-300000831001us-gaap:OtherAggregatedInvestmentsMember2020-07-012020-09-300000831001us-gaap:AvailableforsaleSecuritiesMember2021-01-012021-09-300000831001us-gaap:OtherAggregatedInvestmentsMember2021-01-012021-09-300000831001us-gaap:AvailableforsaleSecuritiesMember2020-01-012020-09-300000831001us-gaap:OtherAggregatedInvestmentsMember2020-01-012020-09-300000831001us-gaap:MortgageBackedSecuritiesMember2021-06-300000831001us-gaap:USTreasuryAndGovernmentMember2021-06-300000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2021-06-300000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2021-06-300000831001us-gaap:DomesticCorporateDebtSecuritiesMember2021-06-3000008310012021-06-300000831001us-gaap:MortgageBackedSecuritiesMember2021-07-012021-09-300000831001us-gaap:USTreasuryAndGovernmentMember2021-07-012021-09-300000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2021-07-012021-09-300000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2021-07-012021-09-300000831001us-gaap:DomesticCorporateDebtSecuritiesMember2021-07-012021-09-300000831001us-gaap:DomesticCorporateDebtSecuritiesMember2021-09-300000831001us-gaap:DomesticCorporateDebtSecuritiesMember2020-12-310000831001us-gaap:MortgageBackedSecuritiesMember2021-01-012021-09-300000831001us-gaap:USTreasuryAndGovernmentMember2021-01-012021-09-300000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2021-01-012021-09-300000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2021-01-012021-09-300000831001us-gaap:DomesticCorporateDebtSecuritiesMember2021-01-012021-09-300000831001us-gaap:MortgageBackedSecuritiesMember2020-06-300000831001us-gaap:USTreasuryAndGovernmentMember2020-06-300000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2020-06-300000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2020-06-300000831001us-gaap:DomesticCorporateDebtSecuritiesMember2020-06-3000008310012020-06-300000831001us-gaap:MortgageBackedSecuritiesMember2020-07-012020-09-300000831001us-gaap:USTreasuryAndGovernmentMember2020-07-012020-09-300000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2020-07-012020-09-300000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2020-07-012020-09-300000831001us-gaap:DomesticCorporateDebtSecuritiesMember2020-07-012020-09-300000831001us-gaap:MortgageBackedSecuritiesMember2020-09-300000831001us-gaap:USTreasuryAndGovernmentMember2020-09-300000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2020-09-300000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2020-09-300000831001us-gaap:DomesticCorporateDebtSecuritiesMember2020-09-300000831001us-gaap:MortgageBackedSecuritiesMember2019-12-310000831001us-gaap:USTreasuryAndGovernmentMember2019-12-310000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2019-12-310000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310000831001us-gaap:DomesticCorporateDebtSecuritiesMember2019-12-310000831001us-gaap:MortgageBackedSecuritiesMember2020-01-012020-09-300000831001us-gaap:USTreasuryAndGovernmentMember2020-01-012020-09-300000831001us-gaap:USStatesAndPoliticalSubdivisionsMember2020-01-012020-09-300000831001us-gaap:ForeignGovernmentDebtSecuritiesMember2020-01-012020-09-300000831001us-gaap:DomesticCorporateDebtSecuritiesMember2020-01-012020-09-300000831001us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PrivateEquityFundsMember2021-09-300000831001us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PrivateEquityFundsMember2020-12-310000831001us-gaap:PrivateEquityFundsMember2021-09-300000831001us-gaap:PrivateEquityFundsMember2020-12-310000831001us-gaap:RealEstateFundsMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-09-300000831001us-gaap:RealEstateFundsMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000831001us-gaap:RealEstateFundsMember2021-09-300000831001us-gaap:RealEstateFundsMember2020-12-310000831001us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberc:MutualCollectiveInvestmentFundsMember2021-09-300000831001us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberc:MutualCollectiveInvestmentFundsMember2020-12-310000831001c:MutualCollectiveInvestmentFundsMember2021-09-300000831001c:MutualCollectiveInvestmentFundsMember2020-12-310000831001us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-09-300000831001us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-31c:category0000831001us-gaap:ConsumerPortfolioSegmentMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMembersrt:NorthAmericaMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancialAssetPastDueMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:FinancialAssetPastDueMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMembersrt:NorthAmericaMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:ResidentialMortgageMemberc:OutsideOfNorthAmericaMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancialAssetPastDueMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:FinancialAssetPastDueMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberc:OutsideOfNorthAmericaMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:OutsideOfNorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:GovernmentGuaranteedCollateralMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMembersrt:NorthAmericaMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:OutsideOfNorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:OutsideOfNorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:OutsideOfNorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:OutsideOfNorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:OutsideOfNorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:OutsideOfNorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:OutsideOfNorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:OutsideOfNorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMembersrt:NorthAmericaMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancialAssetPastDueMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:FinancialAssetPastDueMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMembersrt:NorthAmericaMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:ResidentialMortgageMemberc:OutsideOfNorthAmericaMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:CreditCardReceivablesMemberus-gaap:FinancialAssetPastDueMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:FinancialAssetPastDueMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMemberc:OutsideOfNorthAmericaMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:OutsideOfNorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancialAssetPastDueMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:GovernmentGuaranteedCollateralMembersrt:NorthAmericaMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:GovernmentGuaranteedCollateralMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMembersrt:NorthAmericaMember2020-12-310000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:FICOScore680to760Member2021-09-300000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:FICOScoreNotAvailableMember2021-09-300000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPreResetMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:FICOScore680to760Memberc:HomeEquityLineOfCreditPreResetMember2021-09-300000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPreResetMember2021-09-300000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPostResetMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:FICOScore680to760Memberc:HomeEquityLineOfCreditPostResetMember2021-09-300000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPostResetMember2021-09-300000831001us-gaap:HomeEquityMemberc:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:FICOScore680to760Member2021-09-300000831001us-gaap:HomeEquityMemberc:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:FICOScoreNotAvailableMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:FICOScore680to760Member2021-09-300000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:FICOScoreNotAvailableMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2021-09-300000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:FICOScore680to760Member2021-09-300000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:FICOScoreNotAvailableMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMember2021-09-300000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:FICOScore680to760Member2021-09-300000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:FICOScoreNotAvailableMember2021-09-300000831001c:FICOScoreTotalDebtMemberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:FICOScore680to760Member2020-12-310000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:FICOScoreNotAvailableMember2020-12-310000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPreResetMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:FICOScore680to760Memberc:HomeEquityLineOfCreditPreResetMember2020-12-310000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPreResetMember2020-12-310000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPostResetMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:FICOScore680to760Memberc:HomeEquityLineOfCreditPostResetMember2020-12-310000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPostResetMember2020-12-310000831001us-gaap:HomeEquityMemberc:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:FICOScore680to760Member2020-12-310000831001us-gaap:HomeEquityMemberc:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:FICOScoreNotAvailableMember2020-12-310000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:FICOScore680to760Member2020-12-310000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberc:FICOScoreNotAvailableMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2020-12-310000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:FICOScore680to760Member2020-12-310000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberc:FICOScoreNotAvailableMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMember2020-12-310000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:FICOScore680to760Member2020-12-310000831001c:FICOScoreGreaterThan760Memberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:FICOScoreNotAvailableMember2020-12-310000831001c:FICOScoreTotalDebtMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMembercountry:CAus-gaap:CreditCardReceivablesMember2021-09-300000831001c:FICOScoreLessthan680Memberus-gaap:ConsumerPortfolioSegmentMembercountry:CAus-gaap:CreditCardReceivablesMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:LtvLessThan80PercentMember2021-09-300000831001us-gaap:Ltv80To100PercentMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:DebtToValueRatioLTVGreaterThan100PercentMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:LTVNotAvailableMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPreResetMemberus-gaap:LtvLessThan80PercentMember2021-09-300000831001us-gaap:Ltv80To100PercentMemberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPreResetMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPreResetMemberc:DebtToValueRatioLTVGreaterThan100PercentMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPostResetMemberus-gaap:LtvLessThan80PercentMember2021-09-300000831001us-gaap:Ltv80To100PercentMemberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPostResetMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPostResetMemberc:DebtToValueRatioLTVGreaterThan100PercentMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:LtvLessThan80PercentMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:Ltv80To100PercentMemberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:DebtToValueRatioLTVGreaterThan100PercentMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:LTVNotAvailableMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:LtvLessThan80PercentMember2021-09-300000831001us-gaap:Ltv80To100PercentMemberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:DebtToValueRatioLTVGreaterThan100PercentMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:LTVNotAvailableMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:DebtToValueRatioTotalDebtMember2021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:LtvLessThan80PercentMember2020-12-310000831001us-gaap:Ltv80To100PercentMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:DebtToValueRatioLTVGreaterThan100PercentMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:LTVNotAvailableMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPreResetMemberus-gaap:LtvLessThan80PercentMember2020-12-310000831001us-gaap:Ltv80To100PercentMemberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPreResetMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPreResetMemberc:DebtToValueRatioLTVGreaterThan100PercentMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPostResetMemberus-gaap:LtvLessThan80PercentMember2020-12-310000831001us-gaap:Ltv80To100PercentMemberus-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPostResetMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:HomeEquityLineOfCreditPostResetMemberc:DebtToValueRatioLTVGreaterThan100PercentMember2020-12-310000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:LtvLessThan80PercentMember2020-12-310000831001us-gaap:HomeEquityMemberus-gaap:Ltv80To100PercentMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:DebtToValueRatioLTVGreaterThan100PercentMember2020-12-310000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:LTVNotAvailableMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:LtvLessThan80PercentMember2020-12-310000831001us-gaap:Ltv80To100PercentMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:DebtToValueRatioLTVGreaterThan100PercentMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:LTVNotAvailableMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberc:DebtToValueRatioTotalDebtMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2020-10-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2020-01-012020-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2020-10-012021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2021-07-012021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2020-07-012020-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2020-10-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2020-01-012020-09-300000831001c:IndividualInstallmentAndOtherMemberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001c:IndividualInstallmentAndOtherMemberus-gaap:ConsumerPortfolioSegmentMember2020-10-012021-09-300000831001c:IndividualInstallmentAndOtherMemberus-gaap:ConsumerPortfolioSegmentMember2021-07-012021-09-300000831001c:IndividualInstallmentAndOtherMemberus-gaap:ConsumerPortfolioSegmentMember2020-07-012020-09-300000831001c:IndividualInstallmentAndOtherMemberus-gaap:ConsumerPortfolioSegmentMember2021-01-012021-09-300000831001c:IndividualInstallmentAndOtherMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMember2020-10-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMember2020-01-012020-12-310000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-12-310000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMember2020-01-012020-12-310000831001c:IndividualInstallmentAndOtherMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001c:IndividualInstallmentAndOtherMemberus-gaap:ConsumerPortfolioSegmentMember2020-01-012020-12-310000831001us-gaap:ConsumerPortfolioSegmentMember2020-01-012020-12-31c:quarterc:loan0000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:ContingentPrincipalForgivenessMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2021-07-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:ContingentPrincipalForgivenessMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:NewOfficeOfComptrollerOfCurrencyGuidanceMembersrt:NorthAmericaMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:NewOfficeOfComptrollerOfCurrencyGuidanceMembersrt:NorthAmericaMember2020-07-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:ContingentPrincipalForgivenessMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2021-01-012021-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:HomeEquityMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:ContingentPrincipalForgivenessMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:CreditCardReceivablesMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberc:PersonalSmallBusinessAndOtherMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:PaymentDeferralMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberc:ContingentPrincipalForgivenessMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:PrincipalForgivenessMemberus-gaap:ConsumerPortfolioSegmentMemberus-gaap:NonUsMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:NewOfficeOfComptrollerOfCurrencyGuidanceMembersrt:NorthAmericaMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMemberus-gaap:ResidentialMortgageMemberc:NewOfficeOfComptrollerOfCurrencyGuidanceMembersrt:NorthAmericaMember2020-01-012020-09-300000831001us-gaap:CreditCardReceivablesMember2021-07-012021-09-300000831001us-gaap:MortgageReceivablesMember2021-07-012021-09-300000831001c:IndividualInstallmentAndOtherMember2021-07-012021-09-300000831001us-gaap:CreditCardReceivablesMember2020-10-012020-12-310000831001us-gaap:MortgageReceivablesMember2020-10-012020-12-310000831001c:IndividualInstallmentAndOtherMember2020-10-012020-12-310000831001us-gaap:CreditCardReceivablesMember2020-07-012020-09-300000831001us-gaap:MortgageReceivablesMember2020-07-012020-09-300000831001c:IndividualInstallmentAndOtherMember2020-07-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMembercountry:USc:CommercialAndIndustrialMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMembercountry:USc:CommercialAndIndustrialMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMembercountry:USc:LoansToFinancialInstitutionsMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMembercountry:USc:LoansToFinancialInstitutionsMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMembercountry:US2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMembercountry:US2020-12-310000831001c:InstallmentsRevolvingCreditAndOtherMemberus-gaap:CommercialPortfolioSegmentMembercountry:US2021-09-300000831001c:InstallmentsRevolvingCreditAndOtherMemberus-gaap:CommercialPortfolioSegmentMembercountry:US2020-12-310000831001us-gaap:CommercialPortfolioSegmentMembercountry:USc:LeaseFinancingMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMembercountry:USc:LeaseFinancingMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMembercountry:US2021-09-300000831001us-gaap:CommercialPortfolioSegmentMembercountry:US2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonUsMemberc:CommercialAndIndustrialMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonUsMemberc:CommercialAndIndustrialMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonUsMemberc:LoansToFinancialInstitutionsMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonUsMemberc:LoansToFinancialInstitutionsMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMemberus-gaap:NonUsMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMemberus-gaap:NonUsMember2020-12-310000831001c:InstallmentsRevolvingCreditAndOtherMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:NonUsMember2021-09-300000831001c:InstallmentsRevolvingCreditAndOtherMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:NonUsMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonUsMemberc:LeaseFinancingMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonUsMemberc:LeaseFinancingMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:GovernmentAndOfficialInstitutionsMemberus-gaap:NonUsMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:GovernmentAndOfficialInstitutionsMemberus-gaap:NonUsMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonUsMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:NonUsMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMember2021-07-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMember2020-07-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMember2020-01-012020-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:CommercialAndIndustrialMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2021-09-300000831001us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:LoansToFinancialInstitutionsMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2021-09-300000831001us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2021-09-300000831001us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:LeaseFinancingMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:LeaseFinancingMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:LeaseFinancingMember2021-09-300000831001us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:LeaseFinancingMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:OthersMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:OthersMember2021-09-300000831001us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2021-09-300000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:CommercialAndIndustrialMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-12-310000831001us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:LoansToFinancialInstitutionsMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2020-12-310000831001us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-12-310000831001us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:LeaseFinancingMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:LeaseFinancingMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:LeaseFinancingMember2020-12-310000831001us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:LeaseFinancingMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberc:OthersMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-12-310000831001us-gaap:FinancialAssetNotPastDueMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-12-310000831001c:FinancingReceivables30to89DaysPastDueMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:FinancialAssetNotPastDueMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMember2021-09-300000831001c:ExternalCreditRatingNonInvestmentGradeAccrualMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2021-09-300000831001c:ExternalCreditRatingNonInvestmentGradeAccrualMemberus-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2021-09-300000831001c:ExternalCreditRatingNonInvestmentGradeAccrualMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2021-09-300000831001c:ExternalCreditRatingNonInvestmentGradeAccrualMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ExternalCreditRatingNonInvestmentGradeNonaccrualMemberc:CommercialAndIndustrialMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMemberc:ExternalCreditRatingNonInvestmentGradeNonaccrualMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMemberc:ExternalCreditRatingNonInvestmentGradeNonaccrualMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ExternalCreditRatingNonInvestmentGradeNonaccrualMemberc:OthersMember2021-09-300000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMember2021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:PrivateBankingLoansManagedOnDelinquencyBasisMember2021-09-300000831001c:CorporateLoansNetOfUnearnedIncomeMemberus-gaap:CommercialPortfolioSegmentMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310000831001c:ExternalCreditRatingNonInvestmentGradeAccrualMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-12-310000831001c:ExternalCreditRatingNonInvestmentGradeAccrualMemberus-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2020-12-310000831001c:ExternalCreditRatingNonInvestmentGradeAccrualMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-12-310000831001c:ExternalCreditRatingNonInvestmentGradeAccrualMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:ExternalCreditRatingNonInvestmentGradeNonaccrualMemberc:CommercialAndIndustrialMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMemberc:ExternalCreditRatingNonInvestmentGradeNonaccrualMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMemberc:ExternalCreditRatingNonInvestmentGradeNonaccrualMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:ExternalCreditRatingNonInvestmentGradeNonaccrualMemberc:OthersMember2020-12-310000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:PrivateBankingLoansManagedOnDelinquencyBasisMember2020-12-310000831001c:CorporateLoansNetOfUnearnedIncomeMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2021-07-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2021-07-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2021-07-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:LeaseFinancingMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:LeaseFinancingMember2021-07-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:OthersMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:OthersMember2021-07-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-01-012020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:LoansToFinancialInstitutionsMember2020-01-012020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-01-012020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:LeaseFinancingMember2020-01-012020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-01-012020-12-310000831001us-gaap:CommercialPortfolioSegmentMember2020-01-012020-12-310000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMemberc:CommercialAndIndustrialMember2021-07-012021-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2021-07-012021-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2021-07-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMember2021-07-012021-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2021-07-012021-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2021-07-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMemberc:OthersMember2021-07-012021-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2021-07-012021-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2021-07-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMember2021-07-012021-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMember2021-07-012021-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMember2021-07-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMemberc:CommercialAndIndustrialMember2021-01-012021-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2021-01-012021-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMember2021-01-012021-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2021-01-012021-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMemberc:OthersMember2021-01-012021-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2021-01-012021-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMember2021-01-012021-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMember2021-01-012021-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-07-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMemberc:CommercialAndIndustrialMember2020-07-012020-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-07-012020-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-07-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-07-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMember2020-07-012020-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-07-012020-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-07-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-07-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMemberc:OthersMember2020-07-012020-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-07-012020-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-07-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMember2020-07-012020-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMember2020-07-012020-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMember2020-07-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-01-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMemberc:CommercialAndIndustrialMember2020-01-012020-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-01-012020-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-01-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-01-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMember2020-01-012020-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-01-012020-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-01-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-01-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMemberc:OthersMember2020-01-012020-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-01-012020-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-01-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:ChangesInAmountOrTimingOfPrincipalPaymentsMember2020-01-012020-09-300000831001c:ChangesInAmountOrTimingOfInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-09-300000831001c:ChangesInAmountOrTimingOfPrincipalAndInterestPaymentsMemberus-gaap:CommercialPortfolioSegmentMember2020-01-012020-09-300000831001c:CommercialMarketLoansMemberus-gaap:CommercialPortfolioSegmentMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:CommercialAndIndustrialMember2020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberus-gaap:MortgagesMember2020-09-300000831001us-gaap:CommercialPortfolioSegmentMemberc:OthersMember2020-09-300000831001us-gaap:CommercialPortfolioSegmentMember2020-09-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2021-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310000831001srt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember2021-06-300000831001srt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember2020-06-300000831001srt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember2020-12-310000831001srt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember2019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2021-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2020-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember2019-12-310000831001us-gaap:CommercialPortfolioSegmentMember2021-06-300000831001us-gaap:ConsumerPortfolioSegmentMember2021-06-300000831001us-gaap:CommercialPortfolioSegmentMember2020-06-300000831001us-gaap:ConsumerPortfolioSegmentMember2020-06-300000831001us-gaap:ConsumerPortfolioSegmentMember2020-09-300000831001us-gaap:CommercialPortfolioSegmentMember2019-12-310000831001us-gaap:ConsumerPortfolioSegmentMember2019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ConsumerPortfolioSegmentMember2019-12-310000831001srt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310000831001us-gaap:ConsumerPortfolioSegmentMembersrt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember2020-12-310000831001srt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMemberus-gaap:CommercialPortfolioSegmentMember2019-12-310000831001us-gaap:ConsumerPortfolioSegmentMembersrt:RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember2019-12-310000831001us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMemberus-gaap:CommercialPortfolioSegmentMember2021-09-300000831001us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMemberus-gaap:ConsumerPortfolioSegmentMember2021-09-300000831001us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMember2021-09-300000831001us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMemberus-gaap:CommercialPortfolioSegmentMember2020-12-310000831001us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMemberus-gaap:ConsumerPortfolioSegmentMember2020-12-310000831001us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMember2020-12-310000831001us-gaap:AssetBackedSecuritiesMember2021-06-300000831001us-gaap:AssetBackedSecuritiesMember2021-07-012021-09-300000831001us-gaap:AssetBackedSecuritiesMember2021-01-012021-09-300000831001us-gaap:AssetBackedSecuritiesMember2020-06-300000831001us-gaap:MortgageBackedSecuritiesMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2020-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AssetBackedSecuritiesMember2020-06-300000831001us-gaap:AssetBackedSecuritiesMember2020-07-012020-09-300000831001us-gaap:AssetBackedSecuritiesMember2020-09-300000831001us-gaap:AssetBackedSecuritiesMember2019-12-310000831001us-gaap:MortgageBackedSecuritiesMembersrt:CumulativeEffectPeriodOfAdoptionAdjustmentMember2019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:AssetBackedSecuritiesMember2019-12-310000831001us-gaap:AssetBackedSecuritiesMember2020-01-012020-09-300000831001c:CashAndDueFromBanksMember2021-06-300000831001c:DepositsWithBanksMember2021-06-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2021-06-300000831001c:BrokerageReceivablesMember2021-06-300000831001us-gaap:OtherAssetsMember2021-06-300000831001c:CashAndDueFromBanksMember2021-07-012021-09-300000831001c:DepositsWithBanksMember2021-07-012021-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2021-07-012021-09-300000831001c:BrokerageReceivablesMember2021-07-012021-09-300000831001us-gaap:OtherAssetsMember2021-07-012021-09-300000831001c:CashAndDueFromBanksMember2021-09-300000831001c:DepositsWithBanksMember2021-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2021-09-300000831001c:BrokerageReceivablesMember2021-09-300000831001us-gaap:OtherAssetsMember2021-09-300000831001c:CashAndDueFromBanksMember2020-12-310000831001c:DepositsWithBanksMember2020-12-310000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-12-310000831001c:BrokerageReceivablesMember2020-12-310000831001us-gaap:OtherAssetsMember2020-12-310000831001c:CashAndDueFromBanksMember2021-01-012021-09-300000831001c:DepositsWithBanksMember2021-01-012021-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2021-01-012021-09-300000831001c:BrokerageReceivablesMember2021-01-012021-09-300000831001us-gaap:OtherAssetsMember2021-01-012021-09-300000831001c:CashAndDueFromBanksMember2020-06-300000831001c:DepositsWithBanksMember2020-06-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-06-300000831001c:BrokerageReceivablesMember2020-06-300000831001us-gaap:OtherAssetsMember2020-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberc:CashAndDueFromBanksMember2020-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberc:DepositsWithBanksMember2020-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberc:BrokerageReceivablesMember2020-06-300000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:OtherAssetsMember2020-06-300000831001c:CashAndDueFromBanksMember2020-07-012020-09-300000831001c:DepositsWithBanksMember2020-07-012020-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-07-012020-09-300000831001c:BrokerageReceivablesMember2020-07-012020-09-300000831001us-gaap:OtherAssetsMember2020-07-012020-09-300000831001c:CashAndDueFromBanksMember2020-09-300000831001c:DepositsWithBanksMember2020-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-09-300000831001c:BrokerageReceivablesMember2020-09-300000831001us-gaap:OtherAssetsMember2020-09-300000831001c:CashAndDueFromBanksMember2019-12-310000831001c:DepositsWithBanksMember2019-12-310000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2019-12-310000831001c:BrokerageReceivablesMember2019-12-310000831001us-gaap:OtherAssetsMember2019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberc:CashAndDueFromBanksMember2019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberc:DepositsWithBanksMember2019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberc:BrokerageReceivablesMember2019-12-310000831001srt:CumulativeEffectPeriodOfAdoptionAdjustmentMemberus-gaap:OtherAssetsMember2019-12-310000831001c:CashAndDueFromBanksMember2020-01-012020-09-300000831001c:DepositsWithBanksMember2020-01-012020-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-01-012020-09-300000831001c:BrokerageReceivablesMember2020-01-012020-09-300000831001us-gaap:OtherAssetsMember2020-01-012020-09-300000831001c:GlobalConsumerBankingMember2020-12-310000831001c:InstitutionalClientsGroupMember2020-12-310000831001c:GlobalConsumerBankingMember2021-01-012021-03-310000831001c:InstitutionalClientsGroupMember2021-01-012021-03-310000831001c:GlobalConsumerBankingMember2021-03-310000831001c:InstitutionalClientsGroupMember2021-03-3100008310012021-03-310000831001c:GlobalConsumerBankingMember2021-04-012021-06-300000831001c:InstitutionalClientsGroupMember2021-04-012021-06-300000831001c:GlobalConsumerBankingMember2021-06-300000831001c:InstitutionalClientsGroupMember2021-06-300000831001c:GlobalConsumerBankingMember2021-09-300000831001c:InstitutionalClientsGroupMember2021-09-300000831001srt:MinimumMember2021-07-010000831001srt:MaximumMember2021-07-010000831001c:PurchasedCreditCardRelationshipsMember2021-09-300000831001c:PurchasedCreditCardRelationshipsMember2020-12-310000831001us-gaap:ContractBasedIntangibleAssetsMember2021-09-300000831001us-gaap:ContractBasedIntangibleAssetsMember2020-12-310000831001us-gaap:CoreDepositsMember2021-09-300000831001us-gaap:CoreDepositsMember2020-12-310000831001c:OtherCustomerRelationshipsMember2021-09-300000831001c:OtherCustomerRelationshipsMember2020-12-310000831001c:PresentValueOfFutureProfitsMember2021-09-300000831001c:PresentValueOfFutureProfitsMember2020-12-310000831001us-gaap:IndefinitelivedIntangibleAssetsMember2021-09-300000831001us-gaap:IndefinitelivedIntangibleAssetsMember2020-12-310000831001c:OtherFiniteLivedIntangibleAssetsMember2021-09-300000831001c:OtherFiniteLivedIntangibleAssetsMember2020-12-310000831001c:AmericanAirlinesSearsTheHomeDepotCostcoandATTMemberus-gaap:CustomerConcentrationRiskMemberc:IntangibleAssetsExcludingMortgageServicingRightsMemberus-gaap:ContractBasedIntangibleAssetsMember2021-01-012021-09-300000831001c:AmericanAirlinesSearsTheHomeDepotCostcoandATTMemberus-gaap:CustomerConcentrationRiskMemberc:IntangibleAssetsExcludingMortgageServicingRightsMemberus-gaap:ContractBasedIntangibleAssetsMember2020-01-012020-12-310000831001c:PurchasedCreditCardRelationshipsMember2021-01-012021-09-300000831001us-gaap:ContractBasedIntangibleAssetsMember2021-01-012021-09-300000831001us-gaap:CoreDepositsMember2021-01-012021-09-300000831001c:OtherCustomerRelationshipsMember2021-01-012021-09-300000831001c:PresentValueOfFutureProfitsMember2021-01-012021-09-300000831001us-gaap:IndefinitelivedIntangibleAssetsMember2021-01-012021-09-300000831001c:OtherFiniteLivedIntangibleAssetsMember2021-01-012021-09-300000831001c:BankEntitiesMember2021-09-300000831001c:BankEntitiesMember2020-12-310000831001c:BrokerDealerEntitiesMember2021-09-300000831001c:BrokerDealerEntitiesMember2020-12-310000831001srt:ParentCompanyMember2021-09-300000831001srt:ParentCompanyMember2020-12-310000831001us-gaap:SeniorNotesMemberc:BankEntitiesMember2021-09-300000831001us-gaap:SeniorNotesMemberc:BankEntitiesMember2020-12-310000831001c:CitigroupCapitalIIIMember2021-09-300000831001c:CitigroupCapitalXIIIMember2021-09-300000831001c:CitigroupCapitalXIIIMemberus-gaap:LondonInterbankOfferedRateLIBORMember2021-09-300000831001c:CitigroupCapitalXVIIIMember2021-09-300000831001us-gaap:LondonInterbankOfferedRateLIBORMemberc:CitigroupCapitalXVIIIMember2021-09-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-06-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMember2021-06-300000831001us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-06-300000831001us-gaap:AccumulatedTranslationAdjustmentMember2021-06-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMember2021-06-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-07-012021-09-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMember2021-07-012021-09-300000831001us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-07-012021-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMember2021-07-012021-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMember2021-07-012021-09-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-09-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMember2021-09-300000831001us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMember2021-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMember2021-09-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-12-310000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMember2020-12-310000831001us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-12-310000831001us-gaap:AccumulatedTranslationAdjustmentMember2020-12-310000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMember2020-12-310000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-01-012021-09-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMember2021-01-012021-09-300000831001us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-01-012021-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMember2021-01-012021-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMember2021-01-012021-09-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-06-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMember2020-06-300000831001us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-06-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-06-300000831001us-gaap:AccumulatedTranslationAdjustmentMember2020-06-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMember2020-06-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-07-012020-09-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMember2020-07-012020-09-300000831001us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-07-012020-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-07-012020-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMember2020-07-012020-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMember2020-07-012020-09-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-09-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMember2020-09-300000831001us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMember2020-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMember2020-09-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2019-12-310000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMember2019-12-310000831001us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2019-12-310000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2019-12-310000831001us-gaap:AccumulatedTranslationAdjustmentMember2019-12-310000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMember2019-12-310000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-01-012020-09-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMember2020-01-012020-09-300000831001us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-01-012020-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2020-01-012020-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMember2020-01-012020-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMember2020-01-012020-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:CashFlowHedgingMember2021-07-012021-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:FairValueHedgingMember2021-07-012021-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:CashFlowHedgingMember2021-01-012021-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:FairValueHedgingMember2021-01-012021-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:CashFlowHedgingMember2020-07-012020-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:FairValueHedgingMember2020-07-012020-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:CashFlowHedgingMember2020-01-012020-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:FairValueHedgingMember2020-01-012020-09-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-07-012021-09-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-07-012020-09-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-01-012021-09-300000831001us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-01-012020-09-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-07-012021-09-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-07-012020-09-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-01-012021-09-300000831001c:AccumulatedGainLossFairValueOptionFinancialLiabilitiesAttributabletoParentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-01-012020-09-300000831001us-gaap:InterestRateContractMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-07-012021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-07-012020-09-300000831001us-gaap:InterestRateContractMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-01-012021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-01-012020-09-300000831001us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:ForeignExchangeContractMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-07-012021-09-300000831001us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:ForeignExchangeContractMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-07-012020-09-300000831001us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:ForeignExchangeContractMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-01-012021-09-300000831001us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:ForeignExchangeContractMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-01-012020-09-300000831001us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-07-012021-09-300000831001us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-07-012020-09-300000831001us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-01-012021-09-300000831001us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-01-012020-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember2021-07-012021-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember2020-07-012020-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember2021-01-012021-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember2020-01-012020-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2021-07-012021-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2020-07-012020-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2021-01-012021-09-300000831001us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember2020-01-012020-09-300000831001c:AccumulatedDefinedBenefitPlansAdjustmentFinalizationOfPlanValuationAttributableToParentMember2021-07-012021-09-300000831001c:AccumulatedDefinedBenefitPlansAdjustmentFinalizationOfPlanValuationAttributableToParentMember2020-07-012020-09-300000831001c:AccumulatedDefinedBenefitPlansAdjustmentFinalizationOfPlanValuationAttributableToParentMember2021-01-012021-09-300000831001c:AccumulatedDefinedBenefitPlansAdjustmentFinalizationOfPlanValuationAttributableToParentMember2020-01-012020-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-07-012021-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-07-012020-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-01-012021-09-300000831001us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-01-012020-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-07-012021-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-07-012020-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2021-01-012021-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember2020-01-012020-09-300000831001us-gaap:CollateralizedCreditCardSecuritiesMember2021-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2021-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2021-09-300000831001c:EntityAdministeredAssetBackedCommercialPaperConduitMember2021-09-300000831001us-gaap:CollateralizedLoanObligationsMember2021-09-300000831001us-gaap:AssetBackedSecuritiesMember2021-09-300000831001c:MunicipalSecuritiesTenderOptionBondTrustsMember2021-09-300000831001c:MunicipalInvestmentsMember2021-09-300000831001c:ClientIntermediationMember2021-09-300000831001c:InvestmentFundsMember2021-09-300000831001us-gaap:OtherThanSecuritiesInvestmentMember2021-09-300000831001us-gaap:CollateralizedCreditCardSecuritiesMember2020-12-310000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2020-12-310000831001us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-12-310000831001c:EntityAdministeredAssetBackedCommercialPaperConduitMember2020-12-310000831001us-gaap:CollateralizedLoanObligationsMember2020-12-310000831001us-gaap:AssetBackedSecuritiesMember2020-12-310000831001c:MunicipalSecuritiesTenderOptionBondTrustsMember2020-12-310000831001c:MunicipalInvestmentsMember2020-12-310000831001c:ClientIntermediationMember2020-12-310000831001c:InvestmentFundsMember2020-12-310000831001us-gaap:OtherThanSecuritiesInvestmentMember2020-12-310000831001us-gaap:VentureCapitalFundsMember2021-09-300000831001us-gaap:VentureCapitalFundsMember2020-12-310000831001us-gaap:MortgageBackedSecuritiesMember2021-09-300000831001us-gaap:MortgageBackedSecuritiesMember2020-12-310000831001c:LiquidityFacilitiesMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2021-09-300000831001c:LoanCommitmentsMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2021-09-300000831001c:LiquidityFacilitiesMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-12-310000831001c:LoanCommitmentsMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-12-310000831001c:LiquidityFacilitiesMemberus-gaap:AssetBackedSecuritiesMember2021-09-300000831001c:LoanCommitmentsMemberus-gaap:AssetBackedSecuritiesMember2021-09-300000831001c:LiquidityFacilitiesMemberus-gaap:AssetBackedSecuritiesMember2020-12-310000831001c:LoanCommitmentsMemberus-gaap:AssetBackedSecuritiesMember2020-12-310000831001c:LiquidityFacilitiesMemberc:MunicipalSecuritiesTenderOptionBondTrustsMember2021-09-300000831001c:LoanCommitmentsMemberc:MunicipalSecuritiesTenderOptionBondTrustsMember2021-09-300000831001c:LiquidityFacilitiesMemberc:MunicipalSecuritiesTenderOptionBondTrustsMember2020-12-310000831001c:LoanCommitmentsMemberc:MunicipalSecuritiesTenderOptionBondTrustsMember2020-12-310000831001c:MunicipalInvestmentsMemberc:LiquidityFacilitiesMember2021-09-300000831001c:MunicipalInvestmentsMemberc:LoanCommitmentsMember2021-09-300000831001c:MunicipalInvestmentsMemberc:LiquidityFacilitiesMember2020-12-310000831001c:MunicipalInvestmentsMemberc:LoanCommitmentsMember2020-12-310000831001c:LiquidityFacilitiesMemberc:InvestmentFundsMember2021-09-300000831001c:LoanCommitmentsMemberc:InvestmentFundsMember2021-09-300000831001c:LiquidityFacilitiesMemberc:InvestmentFundsMember2020-12-310000831001c:LoanCommitmentsMemberc:InvestmentFundsMember2020-12-310000831001c:LiquidityFacilitiesMemberus-gaap:OtherThanSecuritiesInvestmentMember2021-09-300000831001c:LoanCommitmentsMemberus-gaap:OtherThanSecuritiesInvestmentMember2021-09-300000831001c:LiquidityFacilitiesMemberus-gaap:OtherThanSecuritiesInvestmentMember2020-12-310000831001c:LoanCommitmentsMemberus-gaap:OtherThanSecuritiesInvestmentMember2020-12-310000831001c:LiquidityFacilitiesMember2021-09-300000831001c:LoanCommitmentsMember2021-09-300000831001c:LiquidityFacilitiesMember2020-12-310000831001c:LoanCommitmentsMember2020-12-310000831001us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2021-09-300000831001us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2020-12-31c:trust0000831001us-gaap:CollateralizedCreditCardSecuritiesMember2021-07-012021-09-300000831001us-gaap:CollateralizedCreditCardSecuritiesMember2020-07-012020-09-300000831001us-gaap:CollateralizedCreditCardSecuritiesMember2021-01-012021-09-300000831001us-gaap:CollateralizedCreditCardSecuritiesMember2020-01-012020-09-300000831001c:CitibankCreditCardMasterTrustMember2021-01-012021-09-300000831001c:CitibankCreditCardMasterTrustMember2020-01-012020-12-310000831001c:CitibankCreditCardMasterTrustMember2021-09-300000831001c:CitibankCreditCardMasterTrustMember2020-12-310000831001c:CitibankOMNIMasterTrustMember2021-01-012021-09-300000831001c:CitibankOMNIMasterTrustMember2020-01-012020-12-310000831001c:CitibankOMNIMasterTrustMember2021-09-300000831001c:CitibankOMNIMasterTrustMember2020-12-310000831001us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2021-07-012021-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2021-07-012021-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2020-07-012020-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-07-012020-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2021-01-012021-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2021-01-012021-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2020-01-012020-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-01-012020-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2021-09-300000831001c:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2021-09-300000831001c:MortgageBackedSecuritiesWithSubordinatedInterestsIssuedByPrivateEnterprisesMember2021-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2020-12-310000831001c:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2020-12-310000831001c:MortgageBackedSecuritiesWithSubordinatedInterestsIssuedByPrivateEnterprisesMember2020-12-310000831001c:PersonalLoanMember2021-09-300000831001srt:WeightedAverageMemberus-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2021-07-012021-09-300000831001srt:WeightedAverageMemberc:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2021-07-012021-09-300000831001c:MortgageBackedSecuritiesWithSubordinatedInterestsIssuedByPrivateEnterprisesMembersrt:WeightedAverageMember2021-07-012021-09-300000831001c:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2021-07-012021-09-300000831001c:MortgageBackedSecuritiesWithSubordinatedInterestsIssuedByPrivateEnterprisesMember2021-07-012021-09-300000831001srt:WeightedAverageMemberus-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2020-07-012020-09-300000831001srt:WeightedAverageMemberc:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2020-07-012020-09-300000831001c:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2020-07-012020-09-300000831001srt:WeightedAverageMemberus-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2021-01-012021-09-300000831001srt:WeightedAverageMemberc:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2021-01-012021-09-300000831001c:MortgageBackedSecuritiesWithSubordinatedInterestsIssuedByPrivateEnterprisesMembersrt:WeightedAverageMember2021-01-012021-09-300000831001c:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2021-01-012021-09-300000831001c:MortgageBackedSecuritiesWithSubordinatedInterestsIssuedByPrivateEnterprisesMember2021-01-012021-09-300000831001srt:WeightedAverageMemberus-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2020-01-012020-09-300000831001srt:WeightedAverageMemberc:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2020-01-012020-09-300000831001c:MortgageBackedSecuritiesWithSubordinatedInterestsIssuedByPrivateEnterprisesMembersrt:WeightedAverageMember2020-01-012020-09-300000831001c:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2020-01-012020-09-300000831001c:MortgageBackedSecuritiesWithSubordinatedInterestsIssuedByPrivateEnterprisesMember2020-01-012020-09-300000831001srt:WeightedAverageMemberus-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2020-01-012020-12-310000831001srt:WeightedAverageMemberc:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2020-01-012020-12-310000831001c:MortgageBackedSecuritiesWithSubordinatedInterestsIssuedByPrivateEnterprisesMembersrt:WeightedAverageMember2020-01-012020-12-310000831001us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember2020-01-012020-12-310000831001c:MortgageBackedSecuritiesWithSeniorInterestsIssuedByPrivateEnterprisesMember2020-01-012020-12-310000831001c:MortgageBackedSecuritiesWithSubordinatedInterestsIssuedByPrivateEnterprisesMember2020-01-012020-12-310000831001us-gaap:ResidentialMortgageBackedSecuritiesMember2021-09-300000831001us-gaap:ResidentialMortgageBackedSecuritiesMember2020-12-310000831001us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-09-300000831001us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-12-310000831001us-gaap:ResidentialMortgageBackedSecuritiesMember2021-07-012021-09-300000831001us-gaap:ResidentialMortgageBackedSecuritiesMember2020-07-012020-09-300000831001us-gaap:ResidentialMortgageBackedSecuritiesMember2021-01-012021-09-300000831001us-gaap:ResidentialMortgageBackedSecuritiesMember2020-01-012020-09-300000831001us-gaap:CommercialMortgageBackedSecuritiesMember2021-09-300000831001us-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310000831001us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-09-300000831001us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2020-12-310000831001us-gaap:CommercialMortgageBackedSecuritiesMember2021-07-012021-09-300000831001us-gaap:CommercialMortgageBackedSecuritiesMember2020-07-012020-09-300000831001us-gaap:CommercialMortgageBackedSecuritiesMember2021-01-012021-09-300000831001us-gaap:CommercialMortgageBackedSecuritiesMember2020-01-012020-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2021-09-300000831001us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-12-310000831001us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2021-09-300000831001us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberus-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember2020-12-310000831001c:MortgageServiceRightsMember2021-09-300000831001c:MortgageServiceRightsMember2020-09-300000831001c:MortgageServiceRightsMember2021-06-300000831001c:MortgageServiceRightsMember2020-06-300000831001c:MortgageServiceRightsMember2020-12-310000831001c:MortgageServiceRightsMember2019-12-310000831001c:MortgageServiceRightsMember2021-07-012021-09-300000831001c:MortgageServiceRightsMember2020-07-012020-09-300000831001c:MortgageServiceRightsMember2021-01-012021-09-300000831001c:MortgageServiceRightsMember2020-01-012020-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2021-07-012021-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2021-01-012021-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2020-07-012020-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2020-01-012020-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2021-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2020-12-310000831001c:EntityAdministeredAssetBackedCommercialPaperConduitMember2021-09-300000831001c:EntityAdministeredAssetBackedCommercialPaperConduitMember2020-12-310000831001c:EntityAdministeredAssetBackedCommercialPaperConduitMember2021-01-012021-09-300000831001c:EntityAdministeredAssetBackedCommercialPaperConduitMember2020-01-012020-12-310000831001srt:MinimumMemberc:EntityAdministeredAssetBackedCommercialPaperConduitMember2021-01-012021-09-300000831001srt:MaximumMemberc:EntityAdministeredAssetBackedCommercialPaperConduitMember2021-01-012021-09-300000831001srt:MinimumMemberc:EntityAdministeredAssetBackedCommercialPaperConduitMember2021-09-300000831001c:EntityConsolidatedAdministeredAssetBackedCommercialPaperConduitMember2021-09-300000831001c:EntityConsolidatedAdministeredAssetBackedCommercialPaperConduitMember2020-12-310000831001us-gaap:CollateralizedLoanObligationsMember2021-09-300000831001us-gaap:CollateralizedLoanObligationsMember2020-12-310000831001c:MunicipalSecuritiesTenderOptionBondTrustsMember2021-09-300000831001c:MunicipalSecuritiesTenderOptionBondTrustsMember2020-12-310000831001c:MunicipalSecuritiesTenderOptionBondTrustsMembersrt:MaximumMember2021-01-012021-09-300000831001us-gaap:CommercialRealEstateMemberus-gaap:AssetBackedSecuritiesMember2021-09-300000831001us-gaap:CommercialRealEstateMemberus-gaap:AssetBackedSecuritiesMember2020-12-310000831001c:CorporateLoansMemberus-gaap:AssetBackedSecuritiesMember2021-09-300000831001c:CorporateLoansMemberus-gaap:AssetBackedSecuritiesMember2020-12-310000831001c:AirplanesShipsAndOtherAssetsMemberus-gaap:AssetBackedSecuritiesMember2021-09-300000831001c:AirplanesShipsAndOtherAssetsMemberus-gaap:AssetBackedSecuritiesMember2020-12-310000831001us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:InterestRateSwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:InterestRateSwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:InterestRateSwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001us-gaap:DesignatedAsHedgingInstrumentMemberc:InterestRateFutureandForwardMember2021-09-300000831001us-gaap:DesignatedAsHedgingInstrumentMemberc:InterestRateFutureandForwardMember2020-12-310000831001us-gaap:NotDesignatedAsHedgingInstrumentTradingMemberc:InterestRateFutureandForwardMember2021-09-300000831001us-gaap:NotDesignatedAsHedgingInstrumentTradingMemberc:InterestRateFutureandForwardMember2020-12-310000831001us-gaap:ShortMemberc:InterestRateOptionMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:ShortMemberc:InterestRateOptionMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:ShortMemberc:InterestRateOptionMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:ShortMemberc:InterestRateOptionMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001c:InterestRateOptionMemberus-gaap:LongMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001c:InterestRateOptionMemberus-gaap:LongMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001c:InterestRateOptionMemberus-gaap:LongMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001c:InterestRateOptionMemberus-gaap:LongMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:CurrencySwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:CurrencySwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:CurrencySwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001c:ForeignExchangeFutureForwardandSpotMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001c:ForeignExchangeFutureForwardandSpotMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001c:ForeignExchangeFutureForwardandSpotMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001c:ForeignExchangeFutureForwardandSpotMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001us-gaap:ShortMemberus-gaap:ForeignExchangeOptionMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:ShortMemberus-gaap:ForeignExchangeOptionMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:ShortMemberus-gaap:ForeignExchangeOptionMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:ShortMemberus-gaap:ForeignExchangeOptionMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001us-gaap:ForeignExchangeOptionMemberus-gaap:LongMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:ForeignExchangeOptionMemberus-gaap:LongMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:ForeignExchangeOptionMemberus-gaap:LongMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:ForeignExchangeOptionMemberus-gaap:LongMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:ForeignExchangeContractMember2021-09-300000831001us-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:ForeignExchangeContractMember2020-12-310000831001us-gaap:EquitySwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:EquitySwapMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:EquitySwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:EquitySwapMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001c:EquityFutureandForwardMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001c:EquityFutureandForwardMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001c:EquityFutureandForwardMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001c:EquityFutureandForwardMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001us-gaap:ShortMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:StockOptionMember2021-09-300000831001us-gaap:ShortMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:StockOptionMember2020-12-310000831001us-gaap:ShortMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:StockOptionMember2021-09-300000831001us-gaap:ShortMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:StockOptionMember2020-12-310000831001us-gaap:LongMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:StockOptionMember2021-09-300000831001us-gaap:LongMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:StockOptionMember2020-12-310000831001us-gaap:LongMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:StockOptionMember2021-09-300000831001us-gaap:LongMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMemberus-gaap:StockOptionMember2020-12-310000831001us-gaap:EquityContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:EquityContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:EquityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:EquityContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001c:CommodityandOtherSwapsMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001c:CommodityandOtherSwapsMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001c:CommodityandOtherSwapsMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001c:CommodityandOtherSwapsMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001c:CommodityandOtherFuturesandForwardsMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001c:CommodityandOtherFuturesandForwardsMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001c:CommodityandOtherFuturesandForwardsMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001c:CommodityandOtherFuturesandForwardsMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:ShortMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:ShortMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:ShortMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:ShortMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:LongMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:LongMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:LongMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:LongMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001c:CommodityAndOtherContractsMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001c:CommodityAndOtherContractsMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001c:CommodityAndOtherContractsMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001c:CommodityAndOtherContractsMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001us-gaap:ShortMemberus-gaap:CreditRiskContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:ShortMemberus-gaap:CreditRiskContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:ShortMemberus-gaap:CreditRiskContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:ShortMemberus-gaap:CreditRiskContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001us-gaap:CreditRiskContractMemberus-gaap:LongMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:CreditRiskContractMemberus-gaap:LongMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:CreditRiskContractMemberus-gaap:LongMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:CreditRiskContractMemberus-gaap:LongMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001us-gaap:CreditRiskContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:CreditRiskContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:CreditRiskContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:CreditRiskContractMemberus-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001us-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:NotDesignatedAsHedgingInstrumentTradingMember2021-09-300000831001us-gaap:NotDesignatedAsHedgingInstrumentTradingMember2020-12-310000831001c:RuleChangesAdoptedbyClearingOrganizationsMember2021-09-300000831001c:RuleChangesAdoptedbyClearingOrganizationsMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:InterestRateContractMemberus-gaap:OverTheCounterMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:OverTheCounterMemberus-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMemberus-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:ExchangeClearedMemberus-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:OverTheCounterMemberus-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:OverTheCounterMemberus-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMemberus-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:ExchangeClearedMemberus-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-09-300000831001us-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:InterestRateContractMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2021-09-300000831001us-gaap:ExchangeClearedMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:InterestRateContractMemberus-gaap:ExchangeTradedMemberus-gaap:NondesignatedMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:ExchangeTradedMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMember2021-09-300000831001us-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMember2021-09-300000831001us-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMember2021-09-300000831001us-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMember2021-09-300000831001us-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMember2021-09-300000831001us-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeTradedMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMember2021-09-300000831001us-gaap:ExchangeTradedMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMember2021-09-300000831001us-gaap:NondesignatedMemberus-gaap:EquityContractMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberc:CommodityOptionAndOtherContractOptionsMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMember2021-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberc:CommodityOptionAndOtherContractOptionsMemberus-gaap:ExchangeTradedMemberus-gaap:NondesignatedMember2021-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:ExchangeTradedMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberc:CommodityOptionAndOtherContractOptionsMemberus-gaap:NondesignatedMember2021-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:CreditRiskContractMember2021-09-300000831001us-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:CreditRiskContractMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:CreditRiskContractMember2021-09-300000831001us-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:CreditRiskContractMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:NondesignatedMemberus-gaap:CreditRiskContractMember2021-09-300000831001us-gaap:NondesignatedMemberus-gaap:CreditRiskContractMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:NondesignatedMember2021-09-300000831001us-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMember2021-09-300000831001c:TradingAccountsLiabilitiesMember2021-09-300000831001us-gaap:OverTheCounterMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:OverTheCounterMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMember2021-09-300000831001us-gaap:ExchangeClearedMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001us-gaap:ExchangeTradedMemberc:TradingAccountsLiabilitiesMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeTradedMember2021-09-300000831001c:TradingAccountsAssetsMemberus-gaap:InterestRateContractMemberus-gaap:OverTheCounterMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:OverTheCounterMemberus-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMemberus-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:ExchangeClearedMemberus-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:OverTheCounterMemberus-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:OverTheCounterMemberus-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000831001us-gaap:DesignatedAsHedgingInstrumentMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:InterestRateContractMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2020-12-310000831001us-gaap:ExchangeClearedMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:InterestRateContractMemberus-gaap:ExchangeTradedMemberus-gaap:NondesignatedMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:ExchangeTradedMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:InterestRateContractMemberus-gaap:NondesignatedMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMember2020-12-310000831001us-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMember2020-12-310000831001us-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeTradedMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMember2020-12-310000831001us-gaap:ExchangeTradedMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMember2020-12-310000831001us-gaap:NondesignatedMemberus-gaap:ForeignExchangeContractMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMember2020-12-310000831001us-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMember2020-12-310000831001us-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeTradedMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMember2020-12-310000831001us-gaap:ExchangeTradedMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:NondesignatedMemberus-gaap:EquityContractMember2020-12-310000831001us-gaap:NondesignatedMemberus-gaap:EquityContractMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberc:CommodityOptionAndOtherContractOptionsMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMember2020-12-310000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberc:CommodityOptionAndOtherContractOptionsMemberus-gaap:ExchangeTradedMemberus-gaap:NondesignatedMember2020-12-310000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:ExchangeTradedMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberc:CommodityOptionAndOtherContractOptionsMemberus-gaap:NondesignatedMember2020-12-310000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:CreditRiskContractMember2020-12-310000831001us-gaap:OverTheCounterMemberus-gaap:NondesignatedMemberus-gaap:CreditRiskContractMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:CreditRiskContractMember2020-12-310000831001us-gaap:ExchangeClearedMemberus-gaap:NondesignatedMemberus-gaap:CreditRiskContractMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:NondesignatedMemberus-gaap:CreditRiskContractMember2020-12-310000831001us-gaap:NondesignatedMemberus-gaap:CreditRiskContractMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:NondesignatedMember2020-12-310000831001us-gaap:NondesignatedMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMember2020-12-310000831001c:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:OverTheCounterMember2020-12-310000831001us-gaap:OverTheCounterMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeClearedMember2020-12-310000831001us-gaap:ExchangeClearedMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001c:TradingAccountsAssetsMemberus-gaap:ExchangeTradedMember2020-12-310000831001us-gaap:ExchangeTradedMemberc:TradingAccountsLiabilitiesMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:OtherIncomeMember2021-07-012021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:OtherIncomeMember2020-07-012020-09-300000831001us-gaap:InterestRateContractMemberus-gaap:OtherIncomeMember2021-01-012021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:OtherIncomeMember2020-01-012020-09-300000831001us-gaap:OtherIncomeMemberus-gaap:ForeignExchangeContractMember2021-07-012021-09-300000831001us-gaap:OtherIncomeMemberus-gaap:ForeignExchangeContractMember2020-07-012020-09-300000831001us-gaap:OtherIncomeMemberus-gaap:ForeignExchangeContractMember2021-01-012021-09-300000831001us-gaap:OtherIncomeMemberus-gaap:ForeignExchangeContractMember2020-01-012020-09-300000831001us-gaap:OtherIncomeMember2021-07-012021-09-300000831001us-gaap:OtherIncomeMember2020-07-012020-09-300000831001us-gaap:OtherIncomeMember2021-01-012021-09-300000831001us-gaap:OtherIncomeMember2020-01-012020-09-300000831001us-gaap:InterestRateContractMemberc:InterestIncomeExpenseNetMember2021-07-012021-09-300000831001us-gaap:InterestRateContractMemberc:InterestIncomeExpenseNetMember2020-07-012020-09-300000831001us-gaap:InterestRateContractMemberc:InterestIncomeExpenseNetMember2021-01-012021-09-300000831001us-gaap:InterestRateContractMemberc:InterestIncomeExpenseNetMember2020-01-012020-09-300000831001us-gaap:ForeignExchangeContractMemberc:InterestIncomeExpenseNetMember2021-07-012021-09-300000831001us-gaap:ForeignExchangeContractMemberc:InterestIncomeExpenseNetMember2020-07-012020-09-300000831001us-gaap:ForeignExchangeContractMemberc:InterestIncomeExpenseNetMember2021-01-012021-09-300000831001us-gaap:ForeignExchangeContractMemberc:InterestIncomeExpenseNetMember2020-01-012020-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:OtherIncomeMember2021-07-012021-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberc:InterestIncomeExpenseNetMember2021-07-012021-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:OtherIncomeMember2020-07-012020-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberc:InterestIncomeExpenseNetMember2020-07-012020-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:OtherIncomeMember2021-01-012021-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberc:InterestIncomeExpenseNetMember2021-01-012021-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberus-gaap:OtherIncomeMember2020-01-012020-09-300000831001c:CommodityOptionAndOtherContractOptionsMemberc:InterestIncomeExpenseNetMember2020-01-012020-09-300000831001c:InterestIncomeExpenseNetMember2021-07-012021-09-300000831001c:InterestIncomeExpenseNetMember2020-07-012020-09-300000831001c:InterestIncomeExpenseNetMember2021-01-012021-09-300000831001c:InterestIncomeExpenseNetMember2020-01-012020-09-300000831001us-gaap:ForeignExchangeContractMember2021-07-012021-09-300000831001us-gaap:ForeignExchangeContractMember2021-01-012021-09-300000831001us-gaap:ForeignExchangeContractMember2020-07-012020-09-300000831001us-gaap:ForeignExchangeContractMember2020-01-012020-09-300000831001us-gaap:InterestRateContractMember2021-07-012021-09-300000831001us-gaap:InterestRateContractMember2020-07-012020-09-300000831001us-gaap:InterestRateContractMember2021-01-012021-09-300000831001us-gaap:InterestRateContractMember2020-01-012020-09-300000831001us-gaap:InterestRateContractMemberus-gaap:OtherNonoperatingIncomeExpenseMember2021-07-012021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:OtherNonoperatingIncomeExpenseMember2020-07-012020-09-300000831001us-gaap:InterestRateContractMemberus-gaap:OtherNonoperatingIncomeExpenseMember2021-01-012021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:OtherNonoperatingIncomeExpenseMember2020-01-012020-09-300000831001us-gaap:ForeignExchangeContractMemberus-gaap:OtherNonoperatingIncomeExpenseMember2021-07-012021-09-300000831001us-gaap:ForeignExchangeContractMemberus-gaap:OtherNonoperatingIncomeExpenseMember2020-07-012020-09-300000831001us-gaap:ForeignExchangeContractMemberus-gaap:OtherNonoperatingIncomeExpenseMember2021-01-012021-09-300000831001us-gaap:ForeignExchangeContractMemberus-gaap:OtherNonoperatingIncomeExpenseMember2020-01-012020-09-300000831001us-gaap:OtherNonoperatingIncomeExpenseMember2021-07-012021-09-300000831001us-gaap:OtherNonoperatingIncomeExpenseMember2020-07-012020-09-300000831001us-gaap:OtherNonoperatingIncomeExpenseMember2021-01-012021-09-300000831001us-gaap:OtherNonoperatingIncomeExpenseMember2020-01-012020-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMemberus-gaap:NetInvestmentHedgingMember2021-07-012021-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMemberus-gaap:NetInvestmentHedgingMember2021-01-012021-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMemberus-gaap:NetInvestmentHedgingMember2020-07-012020-09-300000831001us-gaap:AccumulatedTranslationAdjustmentMemberus-gaap:NetInvestmentHedgingMember2020-01-012020-09-300000831001c:BankMember2021-09-300000831001c:BrokerDealerMember2021-09-300000831001c:NonFinancialMember2021-09-300000831001c:InsuranceAndOtherFinancialInstitutionsMember2021-09-300000831001c:CreditDefaultSwapsAndOptionsMember2021-09-300000831001c:TotalReturnSwapAndOtherCreditDerivativesMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMember2021-09-300000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMember2021-09-300000831001c:CreditDerivativeMaturitiesNextRollingTwelveMonthsMember2021-09-300000831001c:CreditDerivativeMaturitiesNextRollingYearTwoThroughFiveMember2021-09-300000831001c:CreditDerivativeMaturitiesRollingAfterYearFiveMember2021-09-300000831001us-gaap:LongMember2021-09-300000831001us-gaap:ShortMember2021-09-300000831001c:BankMember2020-12-310000831001c:BrokerDealerMember2020-12-310000831001c:NonFinancialMember2020-12-310000831001c:InsuranceAndOtherFinancialInstitutionsMember2020-12-310000831001c:CreditDefaultSwapsAndOptionsMember2020-12-310000831001c:TotalReturnSwapAndOtherCreditDerivativesMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMember2020-12-310000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMember2020-12-310000831001c:CreditDerivativeMaturitiesNextRollingTwelveMonthsMember2020-12-310000831001c:CreditDerivativeMaturitiesNextRollingYearTwoThroughFiveMember2020-12-310000831001c:CreditDerivativeMaturitiesRollingAfterYearFiveMember2020-12-310000831001us-gaap:LongMember2020-12-310000831001us-gaap:ShortMember2020-12-31c:agency0000831001us-gaap:InterestRateSwapMember2021-09-300000831001us-gaap:InterestRateSwapMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel2Memberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel2Memberus-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000831001us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000831001us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel2Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel2Memberus-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:SecuritiesAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:SecuritiesAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:SecuritiesAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:SecuritiesAssetsMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:SecuritiesAssetsMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:SecuritiesAssetsMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:CommodityContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:CommodityContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:CommodityContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:SecuritiesAssetsMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:SecuritiesAssetsMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:SecuritiesAssetsMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberc:NonMarketableEquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:NonMarketableEquitySecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberc:NonMarketableEquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:NonMarketableEquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberc:OtherFinancialAssetsIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel2Memberc:OtherFinancialAssetsIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberc:OtherFinancialAssetsIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:OtherTradingLiabilitiesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:OtherTradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:OtherTradingLiabilitiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:OtherTradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:InterestRateContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:TradingLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:TradingLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:TradingLiabilitiesMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:TradingLiabilitiesMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:CommodityContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:CommodityContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:CommodityContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:TradingLiabilitiesMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:TradingLiabilitiesMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberc:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberc:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2021-09-300000831001us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel2Memberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:CommercialMortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel2Memberus-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:MortgageBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000831001us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000831001us-gaap:FairValueMeasurementsRecurringMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel2Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:ForeignGovernmentDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:CorporateDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel2Memberus-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:EquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:AssetBackedSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:OtherDebtSecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:SecuritiesAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:SecuritiesAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:SecuritiesAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:SecuritiesAssetsMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:SecuritiesAssetsMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:SecuritiesAssetsMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:CommodityContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:CommodityContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:CommodityContractMemberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:SecuritiesAssetsMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:SecuritiesAssetsMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:SecuritiesAssetsMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:SecuritiesAssetsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:SecuritiesAssetsMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberc:NonMarketableEquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:NonMarketableEquitySecuritiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberc:NonMarketableEquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:NonMarketableEquitySecuritiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberc:OtherFinancialAssetsIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel2Memberc:OtherFinancialAssetsIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberc:OtherFinancialAssetsIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:OtherTradingLiabilitiesMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:OtherTradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:OtherTradingLiabilitiesMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:OtherTradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:InterestRateContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:TradingLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:TradingLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:TradingLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:TradingLiabilitiesMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:TradingLiabilitiesMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:TradingLiabilitiesMemberus-gaap:EquityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:CommodityContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:CommodityContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:CommodityContractMemberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:TradingLiabilitiesMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:TradingLiabilitiesMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:TradingLiabilitiesMemberus-gaap:CreditRiskContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:TradingLiabilitiesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:TradingLiabilitiesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel1Memberc:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberc:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2021-06-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2021-07-012021-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:MortgageBackedSecuritiesMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:MortgageBackedSecuritiesMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:MortgageBackedSecuritiesMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USTreasuryAndGovernmentMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USTreasuryAndGovernmentMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USTreasuryAndGovernmentMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CorporateDebtSecuritiesMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CorporateDebtSecuritiesMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CorporateDebtSecuritiesMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:EquitySecuritiesMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:EquitySecuritiesMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:EquitySecuritiesMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:AssetBackedSecuritiesMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:AssetBackedSecuritiesMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:AssetBackedSecuritiesMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:OtherDebtSecuritiesMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:OtherDebtSecuritiesMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:OtherDebtSecuritiesMember2021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMember2021-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMember2021-07-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMember2021-09-300000831001us-gaap:InterestRateContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-06-300000831001us-gaap:InterestRateContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-07-012021-09-300000831001us-gaap:InterestRateContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-09-300000831001us-gaap:ForeignExchangeContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-06-300000831001us-gaap:ForeignExchangeContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-07-012021-09-300000831001us-gaap:ForeignExchangeContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-09-300000831001us-gaap:EquityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-06-300000831001us-gaap:EquityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-07-012021-09-300000831001us-gaap:EquityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-09-300000831001us-gaap:CommodityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-06-300000831001us-gaap:CommodityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-07-012021-09-300000831001us-gaap:CommodityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-09-300000831001us-gaap:CreditRiskContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-06-300000831001us-gaap:CreditRiskContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-07-012021-09-300000831001us-gaap:CreditRiskContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-09-300000831001c:TradingAccountAssetsAndTradingLiabilitiesMember2021-06-300000831001c:TradingAccountAssetsAndTradingLiabilitiesMember2021-07-012021-09-300000831001c:TradingAccountAssetsAndTradingLiabilitiesMember2021-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-06-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-07-012021-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-06-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-07-012021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:MortgageBackedSecuritiesMember2021-06-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:MortgageBackedSecuritiesMember2021-07-012021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:MortgageBackedSecuritiesMember2021-09-300000831001us-gaap:USTreasuryAndGovernmentMemberc:InvestmentsExcludingTradingSecuritiesMember2021-06-300000831001us-gaap:USTreasuryAndGovernmentMemberc:InvestmentsExcludingTradingSecuritiesMember2021-07-012021-09-300000831001us-gaap:USTreasuryAndGovernmentMemberc:InvestmentsExcludingTradingSecuritiesMember2021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-06-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-07-012021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-06-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-07-012021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-09-300000831001us-gaap:CorporateDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-06-300000831001us-gaap:CorporateDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-07-012021-09-300000831001us-gaap:CorporateDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:EquitySecuritiesMember2021-06-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:EquitySecuritiesMember2021-07-012021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:EquitySecuritiesMember2021-09-300000831001us-gaap:AssetBackedSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-06-300000831001us-gaap:AssetBackedSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-07-012021-09-300000831001us-gaap:AssetBackedSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-09-300000831001us-gaap:OtherDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-06-300000831001us-gaap:OtherDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-07-012021-09-300000831001us-gaap:OtherDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-09-300000831001c:NonMarketableEquitySecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-06-300000831001c:NonMarketableEquitySecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-07-012021-09-300000831001c:NonMarketableEquitySecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMember2021-06-300000831001c:InvestmentsExcludingTradingSecuritiesMember2021-07-012021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMember2021-09-300000831001us-gaap:LoansReceivableMember2021-06-300000831001us-gaap:LoansReceivableMember2021-07-012021-09-300000831001us-gaap:LoansReceivableMember2021-09-300000831001us-gaap:ServicingContractsMember2021-06-300000831001us-gaap:ServicingContractsMember2021-07-012021-09-300000831001us-gaap:ServicingContractsMember2021-09-300000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMember2021-06-300000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMember2021-07-012021-09-300000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMember2021-09-300000831001us-gaap:InterestBearingDepositsMember2021-06-300000831001us-gaap:InterestBearingDepositsMember2021-07-012021-09-300000831001us-gaap:InterestBearingDepositsMember2021-09-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2021-06-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2021-07-012021-09-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2021-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:SecuritiesSoldNotYetPurchasedMember2021-06-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:SecuritiesSoldNotYetPurchasedMember2021-07-012021-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:SecuritiesSoldNotYetPurchasedMember2021-09-300000831001c:OtherTradingLiabilitiesMemberus-gaap:TradingLiabilitiesMember2021-06-300000831001c:OtherTradingLiabilitiesMemberus-gaap:TradingLiabilitiesMember2021-07-012021-09-300000831001c:OtherTradingLiabilitiesMemberus-gaap:TradingLiabilitiesMember2021-09-300000831001us-gaap:ShortTermDebtMember2021-06-300000831001us-gaap:ShortTermDebtMember2021-07-012021-09-300000831001us-gaap:ShortTermDebtMember2021-09-300000831001us-gaap:LongTermDebtMember2021-06-300000831001us-gaap:LongTermDebtMember2021-07-012021-09-300000831001us-gaap:LongTermDebtMember2021-09-300000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMember2021-06-300000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMember2021-07-012021-09-300000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMember2021-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-12-310000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CommercialMortgageBackedSecuritiesMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:MortgageBackedSecuritiesMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:MortgageBackedSecuritiesMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USTreasuryAndGovernmentMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USTreasuryAndGovernmentMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CorporateDebtSecuritiesMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CorporateDebtSecuritiesMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:EquitySecuritiesMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:EquitySecuritiesMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:AssetBackedSecuritiesMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:AssetBackedSecuritiesMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:OtherDebtSecuritiesMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:OtherDebtSecuritiesMember2021-01-012021-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMember2020-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMember2021-01-012021-09-300000831001us-gaap:InterestRateContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-12-310000831001us-gaap:InterestRateContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-01-012021-09-300000831001us-gaap:ForeignExchangeContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-12-310000831001us-gaap:ForeignExchangeContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-01-012021-09-300000831001us-gaap:EquityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-12-310000831001us-gaap:EquityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-01-012021-09-300000831001us-gaap:CommodityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-12-310000831001us-gaap:CommodityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-01-012021-09-300000831001us-gaap:CreditRiskContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-12-310000831001us-gaap:CreditRiskContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2021-01-012021-09-300000831001c:TradingAccountAssetsAndTradingLiabilitiesMember2020-12-310000831001c:TradingAccountAssetsAndTradingLiabilitiesMember2021-01-012021-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-12-310000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-01-012021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-12-310000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-01-012021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:MortgageBackedSecuritiesMember2020-12-310000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:MortgageBackedSecuritiesMember2021-01-012021-09-300000831001us-gaap:USTreasuryAndGovernmentMemberc:InvestmentsExcludingTradingSecuritiesMember2020-12-310000831001us-gaap:USTreasuryAndGovernmentMemberc:InvestmentsExcludingTradingSecuritiesMember2021-01-012021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-12-310000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2021-01-012021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-12-310000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2021-01-012021-09-300000831001us-gaap:CorporateDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-12-310000831001us-gaap:CorporateDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-01-012021-09-300000831001us-gaap:AssetBackedSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-12-310000831001us-gaap:AssetBackedSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-01-012021-09-300000831001c:NonMarketableEquitySecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-12-310000831001c:NonMarketableEquitySecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2021-01-012021-09-300000831001c:InvestmentsExcludingTradingSecuritiesMember2020-12-310000831001c:InvestmentsExcludingTradingSecuritiesMember2021-01-012021-09-300000831001us-gaap:LoansReceivableMember2020-12-310000831001us-gaap:LoansReceivableMember2021-01-012021-09-300000831001us-gaap:ServicingContractsMember2020-12-310000831001us-gaap:ServicingContractsMember2021-01-012021-09-300000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMember2020-12-310000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMember2021-01-012021-09-300000831001us-gaap:InterestBearingDepositsMember2020-12-310000831001us-gaap:InterestBearingDepositsMember2021-01-012021-09-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2020-12-310000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2021-01-012021-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:SecuritiesSoldNotYetPurchasedMember2020-12-310000831001us-gaap:TradingLiabilitiesMemberus-gaap:SecuritiesSoldNotYetPurchasedMember2021-01-012021-09-300000831001c:OtherTradingLiabilitiesMemberus-gaap:TradingLiabilitiesMember2020-12-310000831001c:OtherTradingLiabilitiesMemberus-gaap:TradingLiabilitiesMember2021-01-012021-09-300000831001us-gaap:ShortTermDebtMember2020-12-310000831001us-gaap:ShortTermDebtMember2021-01-012021-09-300000831001us-gaap:LongTermDebtMember2020-12-310000831001us-gaap:LongTermDebtMember2021-01-012021-09-300000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMember2020-12-310000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMember2021-01-012021-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-06-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-07-012020-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:MortgageBackedSecuritiesMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:MortgageBackedSecuritiesMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:MortgageBackedSecuritiesMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USTreasuryAndGovernmentMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USTreasuryAndGovernmentMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USTreasuryAndGovernmentMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CorporateDebtSecuritiesMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CorporateDebtSecuritiesMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CorporateDebtSecuritiesMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:EquitySecuritiesMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:EquitySecuritiesMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:EquitySecuritiesMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:AssetBackedSecuritiesMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:AssetBackedSecuritiesMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:AssetBackedSecuritiesMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:OtherDebtSecuritiesMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:OtherDebtSecuritiesMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:OtherDebtSecuritiesMember2020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMember2020-06-300000831001c:TradingAssetsExcludingDerivativeAssetsMember2020-07-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMember2020-09-300000831001us-gaap:InterestRateContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-06-300000831001us-gaap:InterestRateContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-07-012020-09-300000831001us-gaap:InterestRateContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-09-300000831001us-gaap:ForeignExchangeContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-06-300000831001us-gaap:ForeignExchangeContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-07-012020-09-300000831001us-gaap:ForeignExchangeContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-09-300000831001us-gaap:EquityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-06-300000831001us-gaap:EquityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-07-012020-09-300000831001us-gaap:EquityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-09-300000831001us-gaap:CommodityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-06-300000831001us-gaap:CommodityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-07-012020-09-300000831001us-gaap:CommodityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-09-300000831001us-gaap:CreditRiskContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-06-300000831001us-gaap:CreditRiskContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-07-012020-09-300000831001us-gaap:CreditRiskContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-09-300000831001c:TradingAccountAssetsAndTradingLiabilitiesMember2020-06-300000831001c:TradingAccountAssetsAndTradingLiabilitiesMember2020-07-012020-09-300000831001c:TradingAccountAssetsAndTradingLiabilitiesMember2020-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-06-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-07-012020-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-06-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-07-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-06-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-07-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:MortgageBackedSecuritiesMember2020-06-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:MortgageBackedSecuritiesMember2020-07-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:MortgageBackedSecuritiesMember2020-09-300000831001us-gaap:USTreasuryAndGovernmentMemberc:InvestmentsExcludingTradingSecuritiesMember2020-06-300000831001us-gaap:USTreasuryAndGovernmentMemberc:InvestmentsExcludingTradingSecuritiesMember2020-07-012020-09-300000831001us-gaap:USTreasuryAndGovernmentMemberc:InvestmentsExcludingTradingSecuritiesMember2020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-06-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-07-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-06-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-07-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-09-300000831001us-gaap:CorporateDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-06-300000831001us-gaap:CorporateDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-07-012020-09-300000831001us-gaap:CorporateDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:EquitySecuritiesMember2020-06-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:EquitySecuritiesMember2020-07-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:EquitySecuritiesMember2020-09-300000831001us-gaap:AssetBackedSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-06-300000831001us-gaap:AssetBackedSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-07-012020-09-300000831001us-gaap:AssetBackedSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-09-300000831001us-gaap:OtherDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-06-300000831001us-gaap:OtherDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-07-012020-09-300000831001us-gaap:OtherDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-09-300000831001c:NonMarketableEquitySecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-06-300000831001c:NonMarketableEquitySecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-07-012020-09-300000831001c:NonMarketableEquitySecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMember2020-06-300000831001c:InvestmentsExcludingTradingSecuritiesMember2020-07-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMember2020-09-300000831001us-gaap:LoansReceivableMember2020-06-300000831001us-gaap:LoansReceivableMember2020-07-012020-09-300000831001us-gaap:LoansReceivableMember2020-09-300000831001us-gaap:ServicingContractsMember2020-06-300000831001us-gaap:ServicingContractsMember2020-07-012020-09-300000831001us-gaap:ServicingContractsMember2020-09-300000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMember2020-06-300000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMember2020-07-012020-09-300000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMember2020-09-300000831001us-gaap:InterestBearingDepositsMember2020-06-300000831001us-gaap:InterestBearingDepositsMember2020-07-012020-09-300000831001us-gaap:InterestBearingDepositsMember2020-09-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2020-06-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2020-07-012020-09-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2020-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:SecuritiesSoldNotYetPurchasedMember2020-06-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:SecuritiesSoldNotYetPurchasedMember2020-07-012020-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:SecuritiesSoldNotYetPurchasedMember2020-09-300000831001c:OtherTradingLiabilitiesMemberus-gaap:TradingLiabilitiesMember2020-06-300000831001c:OtherTradingLiabilitiesMemberus-gaap:TradingLiabilitiesMember2020-07-012020-09-300000831001c:OtherTradingLiabilitiesMemberus-gaap:TradingLiabilitiesMember2020-09-300000831001us-gaap:ShortTermDebtMember2020-06-300000831001us-gaap:ShortTermDebtMember2020-07-012020-09-300000831001us-gaap:ShortTermDebtMember2020-09-300000831001us-gaap:LongTermDebtMember2020-06-300000831001us-gaap:LongTermDebtMember2020-07-012020-09-300000831001us-gaap:LongTermDebtMember2020-09-300000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMember2020-06-300000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMember2020-07-012020-09-300000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMember2020-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2019-12-310000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberc:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CommercialMortgageBackedSecuritiesMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:MortgageBackedSecuritiesMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:MortgageBackedSecuritiesMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USTreasuryAndGovernmentMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USTreasuryAndGovernmentMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CorporateDebtSecuritiesMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:CorporateDebtSecuritiesMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:EquitySecuritiesMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:EquitySecuritiesMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:AssetBackedSecuritiesMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:AssetBackedSecuritiesMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:OtherDebtSecuritiesMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMemberus-gaap:OtherDebtSecuritiesMember2020-01-012020-09-300000831001c:TradingAssetsExcludingDerivativeAssetsMember2019-12-310000831001c:TradingAssetsExcludingDerivativeAssetsMember2020-01-012020-09-300000831001us-gaap:InterestRateContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2019-12-310000831001us-gaap:InterestRateContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-01-012020-09-300000831001us-gaap:ForeignExchangeContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2019-12-310000831001us-gaap:ForeignExchangeContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-01-012020-09-300000831001us-gaap:EquityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2019-12-310000831001us-gaap:EquityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-01-012020-09-300000831001us-gaap:CommodityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2019-12-310000831001us-gaap:CommodityContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-01-012020-09-300000831001us-gaap:CreditRiskContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2019-12-310000831001us-gaap:CreditRiskContractMemberc:TradingAccountAssetsAndTradingLiabilitiesMember2020-01-012020-09-300000831001c:TradingAccountAssetsAndTradingLiabilitiesMember2019-12-310000831001c:TradingAccountAssetsAndTradingLiabilitiesMember2020-01-012020-09-300000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberc:InvestmentsExcludingTradingSecuritiesMember2019-12-310000831001c:MortgageBackedSecuritiesIssuedByUSGovernmentCorporationsAndAgenciesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-01-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2019-12-310000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ResidentialMortgageBackedSecuritiesMember2020-01-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2019-12-310000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:CommercialMortgageBackedSecuritiesMember2020-01-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:MortgageBackedSecuritiesMember2019-12-310000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:MortgageBackedSecuritiesMember2020-01-012020-09-300000831001us-gaap:USTreasuryAndGovernmentMemberc:InvestmentsExcludingTradingSecuritiesMember2019-12-310000831001us-gaap:USTreasuryAndGovernmentMemberc:InvestmentsExcludingTradingSecuritiesMember2020-01-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2019-12-310000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:USStatesAndPoliticalSubdivisionsMember2020-01-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2019-12-310000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:ForeignGovernmentDebtSecuritiesMember2020-01-012020-09-300000831001us-gaap:CorporateDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2019-12-310000831001us-gaap:CorporateDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-01-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:EquitySecuritiesMember2019-12-310000831001c:InvestmentsExcludingTradingSecuritiesMemberus-gaap:EquitySecuritiesMember2020-01-012020-09-300000831001us-gaap:AssetBackedSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2019-12-310000831001us-gaap:AssetBackedSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-01-012020-09-300000831001us-gaap:OtherDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2019-12-310000831001us-gaap:OtherDebtSecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-01-012020-09-300000831001c:NonMarketableEquitySecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2019-12-310000831001c:NonMarketableEquitySecuritiesMemberc:InvestmentsExcludingTradingSecuritiesMember2020-01-012020-09-300000831001c:InvestmentsExcludingTradingSecuritiesMember2019-12-310000831001c:InvestmentsExcludingTradingSecuritiesMember2020-01-012020-09-300000831001us-gaap:LoansReceivableMember2019-12-310000831001us-gaap:LoansReceivableMember2020-01-012020-09-300000831001us-gaap:ServicingContractsMember2019-12-310000831001us-gaap:ServicingContractsMember2020-01-012020-09-300000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMember2019-12-310000831001c:OtherFinancialAssetsIncludingNonTradingDerivativesMember2020-01-012020-09-300000831001us-gaap:InterestBearingDepositsMember2019-12-310000831001us-gaap:InterestBearingDepositsMember2020-01-012020-09-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2019-12-310000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2020-01-012020-09-300000831001us-gaap:TradingLiabilitiesMemberus-gaap:SecuritiesSoldNotYetPurchasedMember2019-12-310000831001us-gaap:TradingLiabilitiesMemberus-gaap:SecuritiesSoldNotYetPurchasedMember2020-01-012020-09-300000831001c:OtherTradingLiabilitiesMemberus-gaap:TradingLiabilitiesMember2019-12-310000831001c:OtherTradingLiabilitiesMemberus-gaap:TradingLiabilitiesMember2020-01-012020-09-300000831001us-gaap:ShortTermDebtMember2019-12-310000831001us-gaap:ShortTermDebtMember2020-01-012020-09-300000831001us-gaap:LongTermDebtMember2019-12-310000831001us-gaap:LongTermDebtMember2020-01-012020-09-300000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMember2019-12-310000831001c:OtherFinancialLiabilitiesIncludingNonTradingDerivativesMember2020-01-012020-09-300000831001us-gaap:LongTermDebtMemberus-gaap:MeasurementInputOptionVolatilityMember2021-01-012021-09-300000831001us-gaap:LongTermDebtMemberc:MeasurementInputEquityVolatilityMember2021-01-012021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Member2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputCreditSpreadMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MeasurementInputCreditSpreadMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MeasurementInputCreditSpreadMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputInterestRateMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputInterestRateMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputInterestRateMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberc:ValuationTechniqueYieldAnalysisMember2021-09-300000831001c:MeasurementInputYieldMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:ValuationTechniqueYieldAnalysisMember2021-09-300000831001c:MeasurementInputYieldMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:ValuationTechniqueYieldAnalysisMember2021-09-300000831001c:MeasurementInputYieldMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:ValuationTechniqueYieldAnalysisMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMember2021-09-300000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMemberus-gaap:MarketApproachValuationTechniqueMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMembersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMembersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputEquityVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputEquityVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputEquityVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputIlliquidityDiscountMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputIlliquidityDiscountMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputIlliquidityDiscountMember2021-09-300000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Member2021-09-30c:year0000831001c:MeasurementInputWALMemberc:ValuationTechniqueComparablesAnalysisMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Member2021-09-300000831001c:MeasurementInputWALMemberc:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMember2021-09-300000831001c:MeasurementInputWALMemberc:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMember2021-09-300000831001c:ValuationTechniqueComparablesAnalysisMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputRecoveryMember2021-09-300000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputRecoveryMember2021-09-300000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputRecoveryMember2021-09-300000831001c:ValuationTechniqueComparablesAnalysisMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputRevenueMultipleMember2021-09-300000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputRevenueMultipleMembersrt:MaximumMember2021-09-300000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputRevenueMultipleMembersrt:WeightedAverageMember2021-09-300000831001c:ValuationTechniqueComparablesAnalysisMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputIlliquidityDiscountMember2021-09-300000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputIlliquidityDiscountMember2021-09-300000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputIlliquidityDiscountMember2021-09-300000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPrivateEquityRatioMemberus-gaap:MarketApproachValuationTechniqueMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberc:MeasurementInputPrivateEquityRatioMembersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberc:MeasurementInputPrivateEquityRatioMembersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputAdjustmentFactorMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Member2021-09-300000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputAdjustmentFactorMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputAdjustmentFactorMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMembersrt:MaximumMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMembersrt:WeightedAverageMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputEbitdaMultipleMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MeasurementInputEbitdaMultipleMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MeasurementInputEbitdaMultipleMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputRevenueMultipleMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputRevenueMultipleMembersrt:MaximumMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputRevenueMultipleMembersrt:WeightedAverageMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateContractMemberc:MeasurementInputInterestRateNormalVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:InterestRateContractMemberc:MeasurementInputInterestRateNormalVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:InterestRateContractMemberc:MeasurementInputInterestRateNormalVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputInflationVolatilityMemberus-gaap:InterestRateContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputInflationVolatilityMembersrt:MaximumMemberus-gaap:InterestRateContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputInflationVolatilityMembersrt:WeightedAverageMemberus-gaap:InterestRateContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMemberc:MeasurementInputInterestRateNormalVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:MaximumMemberc:MeasurementInputInterestRateNormalVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:WeightedAverageMemberc:MeasurementInputInterestRateNormalVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberc:MeasurementInputForeignExchangeVolatilityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForeignExchangeVolatilityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:MaximumMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForeignExchangeVolatilityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:WeightedAverageMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMemberc:MeasurementInputInterestRateMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:MaximumMemberc:MeasurementInputInterestRateMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:WeightedAverageMemberc:MeasurementInputInterestRateMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputEquityVolatilityMemberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputEquityVolatilityMemberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputEquityVolatilityMemberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputEquityForwardMemberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputEquityForwardMemberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputEquityForwardMemberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputEquityEquityCorrelationMemberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputEquityEquityCorrelationMemberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputEquityEquityCorrelationMemberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberc:MeasurementInputEquityForeignExchangeCorrelationMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputEquityForeignExchangeCorrelationMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputEquityForeignExchangeCorrelationMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:EquityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMember2021-09-300000831001c:MeasurementInputCommodityCorrelationMemberc:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMember2021-09-300000831001c:MeasurementInputCommodityCorrelationMemberc:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:CommodityContractMember2021-09-300000831001c:MeasurementInputCommodityCorrelationMemberc:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:CommodityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputCommodityVolatilityMemberus-gaap:CommodityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputCommodityVolatilityMemberus-gaap:CommodityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputCommodityVolatilityMemberus-gaap:CommodityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:CommodityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:CommodityContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CreditRiskContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputCreditSpreadMemberus-gaap:CreditRiskContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MeasurementInputCreditSpreadMemberus-gaap:CreditRiskContractMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MeasurementInputCreditSpreadMemberus-gaap:CreditRiskContractMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputRecoveryRateMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001us-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputRecoveryRateMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001us-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputRecoveryRateMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001srt:MinimumMemberc:MeasurementInputUpfrontPointsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001c:MeasurementInputUpfrontPointsMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001c:MeasurementInputUpfrontPointsMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputCreditCorrelationMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001us-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputCreditCorrelationMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001us-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputCreditCorrelationMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001srt:MinimumMemberc:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001c:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001c:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000831001c:MeasurementInputYieldMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000831001c:MeasurementInputYieldMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000831001c:MeasurementInputYieldMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2021-09-300000831001c:MeasurementInputWALMemberc:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Member2021-09-300000831001c:MeasurementInputWALMemberc:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMember2021-09-300000831001c:MeasurementInputWALMemberc:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputInterestRateNormalVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputInterestRateNormalVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputInterestRateNormalVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputEquityInterestRateCorrelationMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputEquityInterestRateCorrelationMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputEquityInterestRateCorrelationMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputEquityForeignExchangeCorrelationMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputEquityForeignExchangeCorrelationMembersrt:MaximumMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputEquityForeignExchangeCorrelationMembersrt:WeightedAverageMember2021-09-300000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputForeignExchangeVolatilityMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputForeignExchangeVolatilityMembersrt:MaximumMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputForeignExchangeVolatilityMembersrt:WeightedAverageMember2021-09-300000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Member2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputCreditSpreadMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MeasurementInputCreditSpreadMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MeasurementInputCreditSpreadMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputInterestRateMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputInterestRateMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputInterestRateMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMembersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMembersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberc:ValuationTechniqueYieldAnalysisMember2020-12-310000831001c:MeasurementInputYieldMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:ValuationTechniqueYieldAnalysisMember2020-12-310000831001c:MeasurementInputYieldMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:ValuationTechniqueYieldAnalysisMember2020-12-310000831001c:MeasurementInputYieldMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:ValuationTechniqueYieldAnalysisMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMembersrt:MaximumMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPriceMembersrt:WeightedAverageMember2020-12-310000831001c:MeasurementInputWALMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001c:MeasurementInputWALMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001c:MeasurementInputWALMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputRecoveryMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputRecoveryMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputRecoveryMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Member2020-12-310000831001c:ValuationTechniqueComparablesAnalysisMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputIlliquidityDiscountMember2020-12-310000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputIlliquidityDiscountMember2020-12-310000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputIlliquidityDiscountMember2020-12-310000831001c:ValuationTechniqueComparablesAnalysisMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPrivateEquityRatioMember2020-12-310000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPrivateEquityRatioMembersrt:MaximumMember2020-12-310000831001c:ValuationTechniqueComparablesAnalysisMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputPrivateEquityRatioMembersrt:WeightedAverageMember2020-12-310000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputEbitdaMultipleMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputEbitdaMultipleMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputEbitdaMultipleMember2020-12-310000831001c:MeasurementInputAdjustmentFactorMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001c:MeasurementInputAdjustmentFactorMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001c:MeasurementInputAdjustmentFactorMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2020-12-310000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputRevenueMultipleMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputRevenueMultipleMembersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputRevenueMultipleMembersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputInflationVolatilityMemberus-gaap:InterestRateContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputInflationVolatilityMembersrt:MaximumMemberus-gaap:InterestRateContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputInflationVolatilityMembersrt:WeightedAverageMemberus-gaap:InterestRateContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:InterestRateContractMemberc:MeasurementInputInterestRateNormalVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:InterestRateContractMemberc:MeasurementInputInterestRateNormalVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:InterestRateContractMemberc:MeasurementInputInterestRateNormalVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberc:MeasurementInputForeignExchangeVolatilityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForeignExchangeVolatilityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:MaximumMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForeignExchangeVolatilityMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:WeightedAverageMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMemberc:MeasurementInputContingentEventMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:MaximumMemberc:MeasurementInputContingentEventMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:WeightedAverageMemberc:MeasurementInputContingentEventMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMemberc:MeasurementInputInterestRateMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:MaximumMemberc:MeasurementInputInterestRateMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:WeightedAverageMemberc:MeasurementInputInterestRateMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMemberc:MeasurementInputInterestRateNormalVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:MaximumMemberc:MeasurementInputInterestRateNormalVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:WeightedAverageMemberc:MeasurementInputInterestRateNormalVolatilityMember2020-12-310000831001c:MeasurementInputInterestRateForeignExchangeRateCorrelationMemberc:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMember2020-12-310000831001c:MeasurementInputInterestRateForeignExchangeRateCorrelationMemberc:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:MaximumMember2020-12-310000831001c:MeasurementInputInterestRateForeignExchangeRateCorrelationMemberc:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:WeightedAverageMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputInterestRateInterestRateCorrelationMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputInterestRateInterestRateCorrelationMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:MaximumMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputInterestRateInterestRateCorrelationMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ForeignExchangeContractMembersrt:WeightedAverageMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputEquityVolatilityMemberus-gaap:EquityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputEquityVolatilityMemberus-gaap:EquityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputEquityVolatilityMemberus-gaap:EquityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:EquityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:EquityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMember2020-12-310000831001c:MeasurementInputCommodityCorrelationMemberc:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMember2020-12-310000831001c:MeasurementInputCommodityCorrelationMemberc:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:CommodityContractMember2020-12-310000831001c:MeasurementInputCommodityCorrelationMemberc:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:CommodityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputCommodityVolatilityMemberus-gaap:CommodityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputCommodityVolatilityMemberus-gaap:CommodityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputCommodityVolatilityMemberus-gaap:CommodityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommodityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:CommodityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:CommodityContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CreditRiskContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MeasurementInputCreditSpreadMemberus-gaap:CreditRiskContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MeasurementInputCreditSpreadMemberus-gaap:CreditRiskContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MeasurementInputCreditSpreadMemberus-gaap:CreditRiskContractMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2020-12-310000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputRecoveryRateMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputRecoveryRateMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputRecoveryRateMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2020-12-310000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputCreditCorrelationMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputCreditCorrelationMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputCreditCorrelationMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2020-12-310000831001srt:MinimumMemberc:MeasurementInputUpfrontPointsMemberus-gaap:FairValueInputsLevel3Memberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2020-12-310000831001c:MeasurementInputUpfrontPointsMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2020-12-310000831001c:MeasurementInputUpfrontPointsMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:CreditRiskContractMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputEquityVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputEquityVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputEquityVolatilityMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000831001c:MeasurementInputYieldMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000831001c:MeasurementInputYieldMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000831001c:MeasurementInputYieldMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberus-gaap:ValuationTechniqueDiscountedCashFlowMember2020-12-310000831001c:MeasurementInputWALMemberc:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Member2020-12-310000831001c:MeasurementInputWALMemberc:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMember2020-12-310000831001c:MeasurementInputWALMemberc:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputInterestRateNormalVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputInterestRateNormalVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputInterestRateNormalVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputIRLognormalVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputIRLognormalVolatilityMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputIRLognormalVolatilityMember2020-12-310000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberc:MeasurementInputInterestRateMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:MaximumMemberc:MeasurementInputInterestRateMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMemberc:MeasurementInputInterestRateMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMembersrt:MinimumMemberus-gaap:FairValueInputsLevel3Member2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMemberus-gaap:FairValueInputsLevel3Membersrt:MaximumMember2020-12-310000831001c:ValuationTechniqueModelbasedMemberc:MeasurementInputForwardPriceMemberus-gaap:FairValueInputsLevel3Membersrt:WeightedAverageMember2020-12-310000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Member2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2021-09-300000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000831001us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:FairValueInputsLevel2Member2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MarketApproachValuationTechniqueMember2021-09-300000831001srt:MinimumMemberc:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MarketApproachValuationTechniqueMember2021-09-300000831001c:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMember2021-09-300000831001c:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberc:RecoveryAnalysisValuationTechniqueMember2021-09-300000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberc:RecoveryAnalysisValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:MaximumMemberc:RecoveryAnalysisValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberc:RecoveryAnalysisValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2021-09-300000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2021-09-300000831001srt:MinimumMemberc:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberc:RecoveryAnalysisValuationTechniqueMember2021-09-300000831001c:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:MaximumMemberc:RecoveryAnalysisValuationTechniqueMember2021-09-300000831001c:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberc:RecoveryAnalysisValuationTechniqueMember2021-09-300000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001srt:MinimumMemberc:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001c:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001c:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMember2020-12-310000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:MaximumMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberus-gaap:MarketApproachValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberc:RecoveryAnalysisValuationTechniqueMember2020-12-310000831001srt:MinimumMemberc:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberc:RecoveryAnalysisValuationTechniqueMember2020-12-310000831001c:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:MaximumMemberc:RecoveryAnalysisValuationTechniqueMember2020-12-310000831001c:MeasurementInputPriceMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberc:RecoveryAnalysisValuationTechniqueMember2020-12-310000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberc:RecoveryAnalysisValuationTechniqueMemberc:MeasurementInputRecoveryRateMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:MaximumMemberc:RecoveryAnalysisValuationTechniqueMemberc:MeasurementInputRecoveryRateMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberc:RecoveryAnalysisValuationTechniqueMemberc:MeasurementInputRecoveryRateMember2020-12-310000831001srt:MinimumMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMemberc:RecoveryAnalysisValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:MaximumMemberc:RecoveryAnalysisValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2020-12-310000831001us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsNonrecurringMembersrt:WeightedAverageMemberc:RecoveryAnalysisValuationTechniqueMemberus-gaap:MeasurementInputAppraisedValueMember2020-12-310000831001us-gaap:FairValueMeasurementsNonrecurringMemberc:LoanHeldForSaleMember2021-07-012021-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberc:LoanHeldForSaleMember2020-07-012020-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberc:LoanHeldForSaleMember2021-01-012021-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberc:LoanHeldForSaleMember2020-01-012020-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:RealEstateAcquiredInSatisfactionOfDebtMember2021-07-012021-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:RealEstateAcquiredInSatisfactionOfDebtMember2020-07-012020-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:RealEstateAcquiredInSatisfactionOfDebtMember2021-01-012021-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberus-gaap:RealEstateAcquiredInSatisfactionOfDebtMember2020-01-012020-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberc:LoanHeldForInvestmentImpairedMember2021-07-012021-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberc:LoanHeldForInvestmentImpairedMember2020-07-012020-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberc:LoanHeldForInvestmentImpairedMember2021-01-012021-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMemberc:LoanHeldForInvestmentImpairedMember2020-01-012020-09-300000831001c:NonMarketableEquitySecuritiesMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-07-012021-09-300000831001c:NonMarketableEquitySecuritiesMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-07-012020-09-300000831001c:NonMarketableEquitySecuritiesMemberus-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-09-300000831001c:NonMarketableEquitySecuritiesMemberus-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMember2021-07-012021-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMember2020-07-012020-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMember2021-01-012021-09-300000831001us-gaap:FairValueMeasurementsNonrecurringMember2020-01-012020-09-300000831001us-gaap:CarryingReportedAmountFairValueDisclosureMember2021-09-300000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Member2021-09-300000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Member2021-09-300000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2021-09-300000831001us-gaap:CarryingReportedAmountFairValueDisclosureMember2020-12-310000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel1Member2020-12-310000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel2Member2020-12-310000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Member2020-12-310000831001c:LeaseFinancingMember2021-09-300000831001c:LeaseFinancingMember2020-12-310000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMember2021-09-300000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CommercialPortfolioSegmentMember2020-12-310000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2021-07-012021-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-07-012020-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2021-01-012021-09-300000831001us-gaap:FederalFundsSoldAndSecuritiesBorrowedOrPurchasedUnderAgreementsToResellMember2020-01-012020-09-300000831001c:TradingAccountsAssetsMember2021-07-012021-09-300000831001c:TradingAccountsAssetsMember2020-07-012020-09-300000831001c:TradingAccountsAssetsMember2021-01-012021-09-300000831001c:TradingAccountsAssetsMember2020-01-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMember2021-07-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMember2020-07-012020-09-300000831001us-gaap:CommercialPortfolioSegmentMember2021-01-012021-09-300000831001us-gaap:CommercialPortfolioSegmentMember2020-01-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMember2021-07-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMember2020-07-012020-09-300000831001us-gaap:ConsumerPortfolioSegmentMember2021-01-012021-09-300000831001us-gaap:ConsumerPortfolioSegmentMember2020-01-012020-09-300000831001us-gaap:LoansReceivableMember2021-07-012021-09-300000831001us-gaap:LoansReceivableMember2020-07-012020-09-300000831001us-gaap:LoansReceivableMember2021-01-012021-09-300000831001us-gaap:LoansReceivableMember2020-01-012020-09-300000831001us-gaap:ServicingContractsMember2021-07-012021-09-300000831001us-gaap:ServicingContractsMember2020-07-012020-09-300000831001us-gaap:ServicingContractsMember2021-01-012021-09-300000831001us-gaap:ServicingContractsMember2020-01-012020-09-300000831001c:LoanHeldForSaleMember2021-07-012021-09-300000831001c:LoanHeldForSaleMember2020-07-012020-09-300000831001c:LoanHeldForSaleMember2021-01-012021-09-300000831001c:LoanHeldForSaleMember2020-01-012020-09-300000831001c:AssetsOtherMember2021-07-012021-09-300000831001c:AssetsOtherMember2020-07-012020-09-300000831001c:AssetsOtherMember2021-01-012021-09-300000831001c:AssetsOtherMember2020-01-012020-09-300000831001us-gaap:AssetsMember2021-07-012021-09-300000831001us-gaap:AssetsMember2020-07-012020-09-300000831001us-gaap:AssetsMember2021-01-012021-09-300000831001us-gaap:AssetsMember2020-01-012020-09-300000831001us-gaap:InterestBearingDepositsMember2021-07-012021-09-300000831001us-gaap:InterestBearingDepositsMember2020-07-012020-09-300000831001us-gaap:InterestBearingDepositsMember2021-01-012021-09-300000831001us-gaap:InterestBearingDepositsMember2020-01-012020-09-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2021-07-012021-09-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2020-07-012020-09-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2021-01-012021-09-300000831001us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseMember2020-01-012020-09-300000831001us-gaap:TradingLiabilitiesMember2021-07-012021-09-300000831001us-gaap:TradingLiabilitiesMember2020-07-012020-09-300000831001us-gaap:TradingLiabilitiesMember2021-01-012021-09-300000831001us-gaap:TradingLiabilitiesMember2020-01-012020-09-300000831001us-gaap:ShortTermDebtMember2021-07-012021-09-300000831001us-gaap:ShortTermDebtMember2020-07-012020-09-300000831001us-gaap:ShortTermDebtMember2021-01-012021-09-300000831001us-gaap:ShortTermDebtMember2020-01-012020-09-300000831001us-gaap:LongTermDebtMember2021-07-012021-09-300000831001us-gaap:LongTermDebtMember2020-07-012020-09-300000831001us-gaap:LongTermDebtMember2021-01-012021-09-300000831001us-gaap:LongTermDebtMember2020-01-012020-09-300000831001us-gaap:LiabilityMember2021-07-012021-09-300000831001us-gaap:LiabilityMember2020-07-012020-09-300000831001us-gaap:LiabilityMember2021-01-012021-09-300000831001us-gaap:LiabilityMember2020-01-012020-09-300000831001us-gaap:CarryingReportedAmountFairValueDisclosureMemberc:CertainLoansAndOtherCreditProductsMemberus-gaap:SecuritiesAssetsMember2021-09-300000831001us-gaap:CarryingReportedAmountFairValueDisclosureMemberc:CertainLoansAndOtherCreditProductsMemberus-gaap:LoansReceivableMember2021-09-300000831001us-gaap:CarryingReportedAmountFairValueDisclosureMemberc:CertainLoansAndOtherCreditProductsMemberus-gaap:SecuritiesAssetsMember2020-12-310000831001us-gaap:CarryingReportedAmountFairValueDisclosureMemberc:CertainLoansAndOtherCreditProductsMemberus-gaap:LoansReceivableMember2020-12-310000831001c:CertainLoansAndOtherCreditProductsMemberus-gaap:SecuritiesAssetsMember2021-09-300000831001c:CertainLoansAndOtherCreditProductsMemberus-gaap:LoansReceivableMember2021-09-300000831001c:CertainLoansAndOtherCreditProductsMemberus-gaap:SecuritiesAssetsMember2020-12-310000831001c:CertainLoansAndOtherCreditProductsMemberus-gaap:LoansReceivableMember2020-12-310000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberc:CertainLoansAndOtherCreditProductsMember2021-09-300000831001us-gaap:EstimateOfFairValueFairValueDisclosureMemberc:CertainLoansAndOtherCreditProductsMember2020-12-310000831001c:CertainLoansAndOtherCreditProductsMember2021-01-012021-09-300000831001c:CertainLoansAndOtherCreditProductsMember2020-01-012020-09-300000831001us-gaap:SeparatedHostFinancialInstrumentFairValueOptionMember2021-09-300000831001us-gaap:SeparatedHostFinancialInstrumentFairValueOptionMember2020-12-310000831001c:CertainInvestmentsInUnallocatedPreciousMetalsMemberus-gaap:LongMemberus-gaap:ForwardContractsMember2021-09-300000831001us-gaap:ShortMemberc:CertainInvestmentsInUnallocatedPreciousMetalsMemberus-gaap:ForwardContractsMember2021-09-300000831001us-gaap:CarryingReportedAmountFairValueDisclosureMemberc:LoanHeldForSaleMember2021-09-300000831001us-gaap:CarryingReportedAmountFairValueDisclosureMemberc:LoanHeldForSaleMember2020-12-310000831001us-gaap:MortgageReceivablesMember2021-09-300000831001us-gaap:MortgageReceivablesMember2020-12-310000831001c:InterestRateLinkedMember2021-09-300000831001c:InterestRateLinkedMember2020-12-310000831001c:ForeignExchangeLinkedMember2021-09-300000831001c:ForeignExchangeLinkedMember2020-12-310000831001c:EquityLinkedMember2021-09-300000831001c:EquityLinkedMember2020-12-310000831001c:CommodityLinkedMember2021-09-300000831001c:CommodityLinkedMember2020-12-310000831001c:CreditLinkedMember2021-09-300000831001c:CreditLinkedMember2020-12-310000831001us-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:LongTermDebtMember2021-09-300000831001us-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:LongTermDebtMember2020-12-310000831001us-gaap:LongTermDebtMember2021-09-300000831001us-gaap:LongTermDebtMember2020-12-310000831001us-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:ShortTermDebtMember2021-09-300000831001us-gaap:CarryingReportedAmountFairValueDisclosureMemberus-gaap:ShortTermDebtMember2020-12-310000831001us-gaap:ShortTermDebtMember2021-09-300000831001us-gaap:ShortTermDebtMember2020-12-310000831001us-gaap:FinancialStandbyLetterOfCreditMember2021-09-300000831001us-gaap:PerformanceGuaranteeMember2021-09-300000831001c:DerivativeInstrumentsConsideredGuaranteesMember2021-09-300000831001c:LoansSoldWithRecourseMember2021-09-300000831001c:SecuritiesLendingIndemnificationsMember2021-09-300000831001c:CreditCardMerchantProcessingMember2021-09-300000831001c:CreditCardArrangementswithPartnersMember2021-09-300000831001c:CustodyIndemnificationsAndOtherMember2021-09-300000831001us-gaap:FinancialStandbyLetterOfCreditMember2020-12-310000831001us-gaap:PerformanceGuaranteeMember2020-12-310000831001c:DerivativeInstrumentsConsideredGuaranteesMember2020-12-310000831001c:LoansSoldWithRecourseMember2020-12-310000831001c:SecuritiesLendingIndemnificationsMember2020-12-310000831001c:CreditCardMerchantProcessingMember2020-12-310000831001c:CreditCardArrangementswithPartnersMember2020-12-310000831001c:CustodyIndemnificationsAndOtherMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FinancialStandbyLetterOfCreditMember2021-09-300000831001us-gaap:FinancialStandbyLetterOfCreditMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMember2021-09-300000831001us-gaap:FinancialStandbyLetterOfCreditMemberc:ExternalCreditRatingNotRatedMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:PerformanceGuaranteeMember2021-09-300000831001us-gaap:PerformanceGuaranteeMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMember2021-09-300000831001us-gaap:PerformanceGuaranteeMemberc:ExternalCreditRatingNotRatedMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberc:DerivativeInstrumentsConsideredGuaranteesMember2021-09-300000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberc:DerivativeInstrumentsConsideredGuaranteesMember2021-09-300000831001c:DerivativeInstrumentsConsideredGuaranteesMemberc:ExternalCreditRatingNotRatedMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberc:LoansSoldWithRecourseMember2021-09-300000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberc:LoansSoldWithRecourseMember2021-09-300000831001c:ExternalCreditRatingNotRatedMemberc:LoansSoldWithRecourseMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberc:SecuritiesLendingIndemnificationsMember2021-09-300000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberc:SecuritiesLendingIndemnificationsMember2021-09-300000831001c:ExternalCreditRatingNotRatedMemberc:SecuritiesLendingIndemnificationsMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberc:CreditCardMerchantProcessingMember2021-09-300000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberc:CreditCardMerchantProcessingMember2021-09-300000831001c:ExternalCreditRatingNotRatedMemberc:CreditCardMerchantProcessingMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberc:CreditCardArrangementswithPartnersMember2021-09-300000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberc:CreditCardArrangementswithPartnersMember2021-09-300000831001c:ExternalCreditRatingNotRatedMemberc:CreditCardArrangementswithPartnersMember2021-09-300000831001c:CustodyIndemnificationsAndOtherMemberus-gaap:ExternalCreditRatingInvestmentGradeMember2021-09-300000831001c:CustodyIndemnificationsAndOtherMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMember2021-09-300000831001c:CustodyIndemnificationsAndOtherMemberc:ExternalCreditRatingNotRatedMember2021-09-300000831001c:ExternalCreditRatingNotRatedMember2021-09-300000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:FinancialStandbyLetterOfCreditMember2020-12-310000831001us-gaap:FinancialStandbyLetterOfCreditMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMember2020-12-310000831001us-gaap:FinancialStandbyLetterOfCreditMemberc:ExternalCreditRatingNotRatedMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberus-gaap:PerformanceGuaranteeMember2020-12-310000831001us-gaap:PerformanceGuaranteeMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMember2020-12-310000831001us-gaap:PerformanceGuaranteeMemberc:ExternalCreditRatingNotRatedMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberc:DerivativeInstrumentsConsideredGuaranteesMember2020-12-310000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberc:DerivativeInstrumentsConsideredGuaranteesMember2020-12-310000831001c:DerivativeInstrumentsConsideredGuaranteesMemberc:ExternalCreditRatingNotRatedMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberc:LoansSoldWithRecourseMember2020-12-310000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberc:LoansSoldWithRecourseMember2020-12-310000831001c:ExternalCreditRatingNotRatedMemberc:LoansSoldWithRecourseMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberc:SecuritiesLendingIndemnificationsMember2020-12-310000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberc:SecuritiesLendingIndemnificationsMember2020-12-310000831001c:ExternalCreditRatingNotRatedMemberc:SecuritiesLendingIndemnificationsMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberc:CreditCardMerchantProcessingMember2020-12-310000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberc:CreditCardMerchantProcessingMember2020-12-310000831001c:ExternalCreditRatingNotRatedMemberc:CreditCardMerchantProcessingMember2020-12-310000831001us-gaap:ExternalCreditRatingInvestmentGradeMemberc:CreditCardArrangementswithPartnersMember2020-12-310000831001us-gaap:ExternalCreditRatingNonInvestmentGradeMemberc:CreditCardArrangementswithPartnersMember2020-12-310000831001c:ExternalCreditRatingNotRatedMemberc:CreditCardArrangementswithPartnersMember2020-12-310000831001c:CustodyIndemnificationsAndOtherMemberus-gaap:ExternalCreditRatingInvestmentGradeMember2020-12-310000831001c:CustodyIndemnificationsAndOtherMemberus-gaap:ExternalCreditRatingNonInvestmentGradeMember2020-12-310000831001c:CustodyIndemnificationsAndOtherMemberc:ExternalCreditRatingNotRatedMember2020-12-310000831001c:ExternalCreditRatingNotRatedMember2020-12-310000831001srt:WeightedAverageMember2021-09-300000831001c:CommercialAndSimilarLetterOfCreditMembercountry:US2021-09-300000831001c:CommercialAndSimilarLetterOfCreditMemberus-gaap:NonUsMember2021-09-300000831001c:CommercialAndSimilarLetterOfCreditMember2021-09-300000831001c:CommercialAndSimilarLetterOfCreditMember2020-12-310000831001c:OneToFourFamilyResidentialMortgagesCommitmentMembercountry:US2021-09-300000831001c:OneToFourFamilyResidentialMortgagesCommitmentMemberus-gaap:NonUsMember2021-09-300000831001c:OneToFourFamilyResidentialMortgagesCommitmentMember2021-09-300000831001c:OneToFourFamilyResidentialMortgagesCommitmentMember2020-12-310000831001country:USus-gaap:HomeEquityMember2021-09-300000831001us-gaap:HomeEquityMemberus-gaap:NonUsMember2021-09-300000831001us-gaap:HomeEquityMember2021-09-300000831001us-gaap:HomeEquityMember2020-12-310000831001country:USc:CommercialRealEstateConstructionAndLandDevelopmentMember2021-09-300000831001us-gaap:NonUsMemberc:CommercialRealEstateConstructionAndLandDevelopmentMember2021-09-300000831001c:CommercialRealEstateConstructionAndLandDevelopmentMember2021-09-300000831001c:CommercialRealEstateConstructionAndLandDevelopmentMember2020-12-310000831001country:USc:CreditCardLinesOfCreditMember2021-09-300000831001us-gaap:NonUsMemberc:CreditCardLinesOfCreditMember2021-09-300000831001c:CreditCardLinesOfCreditMember2021-09-300000831001c:CreditCardLinesOfCreditMember2020-12-310000831001c:CommercialAndOtherConsumerLoanCommitmentsMembercountry:US2021-09-300000831001c:CommercialAndOtherConsumerLoanCommitmentsMemberus-gaap:NonUsMember2021-09-300000831001c:CommercialAndOtherConsumerLoanCommitmentsMember2021-09-300000831001c:CommercialAndOtherConsumerLoanCommitmentsMember2020-12-310000831001c:OtherCommitmentsAndContingenciesMembercountry:US2021-09-300000831001c:OtherCommitmentsAndContingenciesMemberus-gaap:NonUsMember2021-09-300000831001c:OtherCommitmentsAndContingenciesMember2021-09-300000831001c:OtherCommitmentsAndContingenciesMember2020-12-310000831001country:US2021-09-300000831001us-gaap:NonUsMember2021-09-300000831001srt:ReportableLegalEntitiesMembersrt:ParentCompanyMember2021-07-012021-09-300000831001srt:SubsidiaryIssuerMembersrt:ReportableLegalEntitiesMember2021-07-012021-09-300000831001srt:NonGuarantorSubsidiariesMembersrt:ReportableLegalEntitiesMember2021-07-012021-09-300000831001srt:ConsolidationEliminationsMember2021-07-012021-09-300000831001srt:ReportableLegalEntitiesMembersrt:ParentCompanyMember2021-01-012021-09-300000831001srt:SubsidiaryIssuerMembersrt:ReportableLegalEntitiesMember2021-01-012021-09-300000831001srt:NonGuarantorSubsidiariesMembersrt:ReportableLegalEntitiesMember2021-01-012021-09-300000831001srt:ConsolidationEliminationsMember2021-01-012021-09-300000831001srt:ReportableLegalEntitiesMembersrt:ParentCompanyMember2020-07-012020-09-300000831001srt:SubsidiaryIssuerMembersrt:ReportableLegalEntitiesMember2020-07-012020-09-300000831001srt:NonGuarantorSubsidiariesMembersrt:ReportableLegalEntitiesMember2020-07-012020-09-300000831001srt:ConsolidationEliminationsMember2020-07-012020-09-300000831001srt:ReportableLegalEntitiesMembersrt:ParentCompanyMember2020-01-012020-09-300000831001srt:SubsidiaryIssuerMembersrt:ReportableLegalEntitiesMember2020-01-012020-09-300000831001srt:NonGuarantorSubsidiariesMembersrt:ReportableLegalEntitiesMember2020-01-012020-09-300000831001srt:ConsolidationEliminationsMember2020-01-012020-09-300000831001srt:ReportableLegalEntitiesMembersrt:ParentCompanyMember2021-09-300000831001srt:SubsidiaryIssuerMembersrt:ReportableLegalEntitiesMember2021-09-300000831001srt:NonGuarantorSubsidiariesMembersrt:ReportableLegalEntitiesMember2021-09-300000831001srt:ConsolidationEliminationsMember2021-09-300000831001c:CitibankNASubsidiaryMember2021-09-300000831001us-gaap:MaturityUpTo30DaysMemberc:CitibankNASubsidiaryMember2021-09-300000831001srt:ReportableLegalEntitiesMembersrt:ParentCompanyMember2020-12-310000831001srt:SubsidiaryIssuerMembersrt:ReportableLegalEntitiesMember2020-12-310000831001srt:NonGuarantorSubsidiariesMembersrt:ReportableLegalEntitiesMember2020-12-310000831001srt:ConsolidationEliminationsMember2020-12-310000831001c:CitibankNASubsidiaryMember2020-12-310000831001us-gaap:MaturityUpTo30DaysMemberc:CitibankNASubsidiaryMember2020-12-310000831001srt:ReportableLegalEntitiesMembersrt:ParentCompanyMember2019-12-310000831001srt:SubsidiaryIssuerMembersrt:ReportableLegalEntitiesMember2019-12-310000831001srt:NonGuarantorSubsidiariesMembersrt:ReportableLegalEntitiesMember2019-12-310000831001srt:ConsolidationEliminationsMember2019-12-310000831001srt:ReportableLegalEntitiesMembersrt:ParentCompanyMember2020-09-300000831001srt:SubsidiaryIssuerMembersrt:ReportableLegalEntitiesMember2020-09-300000831001srt:NonGuarantorSubsidiariesMembersrt:ReportableLegalEntitiesMember2020-09-300000831001srt:ConsolidationEliminationsMember2020-09-300000831001us-gaap:CommonStockMember2021-01-012021-09-300000831001c:DepositorySharesRepresenting11000thInterestInAShareOf7.125NoncumulativePreferredStockSeriesJMember2021-01-012021-09-300000831001c:DepositorySharesRepresenting11000thInterestInAShareOf6.875NoncumulativePreferredStockSeriesKMember2021-01-012021-09-300000831001c:SevenPointSixTwoFivePercentTrustPreferredSecuritiesOfCitigroupCapitalIIIMember2021-01-012021-09-300000831001c:SevenPointEightSevenFivePercentFixedRateFloatingRateTrustPreferredSecuritiesOfCitigroupCapitalXIIIMember2021-01-012021-09-300000831001c:SixPointEightTwoNinePercentFixedRateFloatingRateEnhancedTrustPreferredSecuritiesOfCitigroupCapitalXVIIIMember2021-01-012021-09-300000831001c:MediumTermSeniorNotesSeriesNCallableStepUpCouponNotesDueMarch312036OfCGMHIMember2021-01-012021-09-300000831001c:MediumTermSeniorNotesSeriesNCallableStepUpCouponNotesDueFebruary262036OfCGMHIMember2021-01-012021-09-300000831001c:MediumTermSeniorNotesSeriesNCallableFixedRateNotesDueDecember182035OfCGMHIMember2021-01-012021-09-300000831001c:MediumTermSeniorNotesSeriesNCallableFixedRateNotesDueApril262028OfCGMHIMember2021-01-012021-09-300000831001c:MediumTermSeniorNotesSeriesNCallableFixedRateNotesDueSeptember172028OfCGMHIMember2021-01-012021-09-300000831001c:MediumTermSeniorNotesSeriesNCallableFixedRateNotesDueSeptember152028OfCGMHIMember2021-01-012021-09-300000831001c:MediumTermSeniorNotesSeriesNCallableFixedRateNotesDueOctober62028OfCGMHIMember2021-01-012021-09-30

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

☒			QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2021

OR

☐			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from  to

Commission file number 1-9924

Citigroup Inc.

(Exact name of registrant as specified in its charter)

Delaware

52-1568099

(State or other jurisdiction of incorporation or organization)

(I.R.S. Employer Identification No.)

388 Greenwich Street,

New York

NY

10013

(Address of principal executive offices)

(Zip code)

(212) 559-1000

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 formatted in Inline XBRL: See Exhibit 99.01

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes ☒    No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).  Yes ☒  No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. Yes ☐    

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes ☐    No ☒

Number of shares of Citigroup Inc. common stock outstanding on September 30, 2021: 1,984,267,239

Available on the web at www.citigroup.com

Citigroup is managed pursuant to two business segments: Global Consumer Banking and Institutional Clients Group, with the remaining operations in Corporate/Other.

Citigroup Segments

Global Consumer Banking (GCB)

Institutional Clients Group (ICG)

•North America •Latin America(1) •Asia(2)   Consisting of: •Retail banking and wealth management, including –Residential real estate –Small business banking •Citi-branded cards in all regions •Citi retail services in North America

•Banking –Investment banking –Treasury and trade solutions –Corporate lending –Private bank     •Markets and securities services –Fixed income markets –Equity markets –Securities services

Corporate/Other

•Corporate Treasury •Operations and technology •Global staff functions and other corporate expenses •Legacy non-core assets: –Consumer loans –Certain portfolios of securities, loans and other assets •Discontinued operations

The following are the four regions in which Citigroup operates. The regional results are fully reflected in the segment and Corporate/Other results above.

(1)    Latin America GCB consists of Citi’s consumer banking business in Mexico.

(2)    Asia GCB includes the results of operations of GCB activities in certain EMEA countries for all periods presented.

(3)    North America includes the U.S., Canada and Puerto Rico, Latin America includes Mexico and Asia includes Japan.

As previously disclosed, Citi will focus its consumer banking franchise in Asia and EMEA on four wealth centers—Singapore, Hong Kong, the United Arab Emirates (UAE) and London—and is pursuing exits of its consumer franchises in 13 markets across the two regions. ICG will continue to serve clients, including its commercial banking clients, in all of these markets. For additional information, see “Executive Summary” and “Asia GCB” below and Note 2 to the Consolidated Financial Statements. For information regarding risks related to Citi’s exits from the 13 markets, see “Forward-Looking Statements” below.

In conjunction with its strategic refresh, Citi is assessing its current operating segment and reporting unit structure along with potential changes to management reporting used to assist in decisions about resources and capital allocation, and assess business performance.