00009363402021FYFALSE00000283850.51111111111111110 million0.00005http://fasb.org/us-gaap/2021-01-31#PropertyPlantAndEquipmentNethttp://fasb.org/us-gaap/2021-01-31#PropertyPlantAndEquipmentNethttp://fasb.org/us-gaap/2021-01-31#PropertyPlantAndEquipmentNethttp://fasb.org/us-gaap/2021-01-31#PropertyPlantAndEquipmentNethttp://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligationsCurrenthttp://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligationsCurrenthttp://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligationsCurrenthttp://fasb.org/us-gaap/2021-01-31#LongTermDebtAndCapitalLeaseObligationsCurrent8400009363402021-01-012021-12-310000936340dte:DTEElectricMember2021-01-012021-12-310000936340us-gaap:CommonStockMember2021-01-012021-12-310000936340dte:SeriesE20175.25JuniorSubordinatedDebenturesDue2077Member2021-01-012021-12-310000936340dte:A20196.25CorporateUnitsMember2021-01-012021-12-310000936340dte:SeriesG20204375JuniorSubordinatedDebenturesDue2080Member2021-01-012021-12-310000936340dte:SeriesE20214375JuniorSubordinatedDebenturesDue2081Member2021-01-012021-12-3100009363402021-06-30iso4217:USD00009363402022-01-31xbrli:shares0000936340dte:DTEElectricMember2022-01-3100009363402020-01-012020-12-3100009363402019-01-012019-12-31iso4217:USDxbrli:shares00009363402021-12-3100009363402020-12-310000936340us-gaap:SegmentContinuingOperationsMember2021-12-310000936340us-gaap:SegmentContinuingOperationsMember2020-12-310000936340us-gaap:SegmentDiscontinuedOperationsMember2021-12-310000936340us-gaap:SegmentDiscontinuedOperationsMember2020-12-3100009363402019-12-3100009363402018-12-310000936340us-gaap:CommonStockMember2018-12-310000936340us-gaap:RetainedEarningsMember2018-12-310000936340us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-12-310000936340us-gaap:NoncontrollingInterestMember2018-12-310000936340us-gaap:RetainedEarningsMember2019-01-012019-12-310000936340us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-01-012019-12-310000936340us-gaap:NoncontrollingInterestMember2019-01-012019-12-310000936340us-gaap:CommonStockMember2019-01-012019-12-310000936340us-gaap:CommonStockMember2019-12-310000936340us-gaap:RetainedEarningsMember2019-12-310000936340us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-12-310000936340us-gaap:NoncontrollingInterestMember2019-12-310000936340us-gaap:RetainedEarningsMember2020-01-012020-12-310000936340us-gaap:NoncontrollingInterestMember2020-01-012020-12-310000936340us-gaap:CommonStockMember2020-01-012020-12-310000936340us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-01-012020-12-310000936340us-gaap:CommonStockMember2020-12-310000936340us-gaap:RetainedEarningsMember2020-12-310000936340us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-12-310000936340us-gaap:NoncontrollingInterestMember2020-12-310000936340us-gaap:RetainedEarningsMember2021-01-012021-12-310000936340us-gaap:NoncontrollingInterestMember2021-01-012021-12-310000936340us-gaap:CommonStockMember2021-01-012021-12-310000936340us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-01-012021-12-310000936340us-gaap:CommonStockMember2021-12-310000936340us-gaap:RetainedEarningsMember2021-12-310000936340us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-12-310000936340us-gaap:NoncontrollingInterestMember2021-12-310000936340dte:DTEElectricMember2020-01-012020-12-310000936340dte:DTEElectricMember2019-01-012019-12-310000936340dte:DTEElectricMember2021-12-310000936340dte:DTEElectricMember2020-12-310000936340dte:DTEElectricMember2019-12-310000936340dte:DTEElectricMember2018-12-310000936340dte:DTEElectricMemberus-gaap:CommonStockMember2018-12-310000936340us-gaap:AdditionalPaidInCapitalMemberdte:DTEElectricMember2018-12-310000936340us-gaap:RetainedEarningsMemberdte:DTEElectricMember2018-12-310000936340us-gaap:RetainedEarningsMemberdte:DTEElectricMember2019-01-012019-12-310000936340us-gaap:AdditionalPaidInCapitalMemberdte:DTEElectricMember2019-01-012019-12-310000936340dte:DTEElectricMemberus-gaap:CommonStockMember2019-12-310000936340us-gaap:AdditionalPaidInCapitalMemberdte:DTEElectricMember2019-12-310000936340us-gaap:RetainedEarningsMemberdte:DTEElectricMember2019-12-310000936340us-gaap:RetainedEarningsMemberdte:DTEElectricMember2020-01-012020-12-310000936340us-gaap:AdditionalPaidInCapitalMemberdte:DTEElectricMember2020-01-012020-12-310000936340dte:DTEElectricMemberus-gaap:CommonStockMember2020-12-310000936340us-gaap:AdditionalPaidInCapitalMemberdte:DTEElectricMember2020-12-310000936340us-gaap:RetainedEarningsMemberdte:DTEElectricMember2020-12-310000936340us-gaap:RetainedEarningsMemberdte:DTEElectricMember2021-01-012021-12-310000936340us-gaap:AdditionalPaidInCapitalMemberdte:DTEElectricMember2021-01-012021-12-310000936340dte:DTEElectricMemberus-gaap:CommonStockMember2021-12-310000936340us-gaap:AdditionalPaidInCapitalMemberdte:DTEElectricMember2021-12-310000936340us-gaap:RetainedEarningsMemberdte:DTEElectricMember2021-12-31dte:customer0000936340us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2021-12-310000936340us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2020-12-310000936340us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2021-12-310000936340us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2020-12-310000936340us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2019-12-310000936340us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2019-12-310000936340us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2019-12-310000936340us-gaap:AociIncludingPortionAttributableToNoncontrollingInterestMember2019-12-310000936340us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2020-01-012020-12-310000936340us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2020-01-012020-12-310000936340us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2020-01-012020-12-310000936340us-gaap:AociIncludingPortionAttributableToNoncontrollingInterestMember2020-01-012020-12-310000936340us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2020-12-310000936340us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2020-12-310000936340us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2020-12-310000936340us-gaap:AociIncludingPortionAttributableToNoncontrollingInterestMember2020-12-310000936340us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2021-01-012021-12-310000936340us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-12-310000936340us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-12-310000936340us-gaap:AociIncludingPortionAttributableToNoncontrollingInterestMember2021-01-012021-12-310000936340us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2021-12-310000936340us-gaap:AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-12-310000936340us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2021-12-310000936340us-gaap:AociIncludingPortionAttributableToNoncontrollingInterestMember2021-12-310000936340us-gaap:UnbilledRevenuesMember2021-12-310000936340us-gaap:UnbilledRevenuesMember2020-12-310000936340us-gaap:UnbilledRevenuesMemberdte:DTEElectricMember2021-12-310000936340us-gaap:UnbilledRevenuesMemberdte:DTEElectricMember2020-12-310000936340us-gaap:NotesReceivableMemberdte:InternalGradeOneMember2021-12-310000936340dte:DTEElectricMemberus-gaap:NotesReceivableMemberdte:InternalGradeOneMember2021-12-310000936340dte:InternalGradeTwoMemberus-gaap:NotesReceivableMember2021-12-310000936340dte:InternalGradeTwoMemberdte:DTEElectricMemberus-gaap:NotesReceivableMember2021-12-310000936340us-gaap:NotesReceivableMember2021-12-310000936340dte:DTEElectricMemberus-gaap:NotesReceivableMember2021-12-310000936340dte:InternalGradeOneMemberdte:FinanceLeaseReceivableMember2021-12-310000936340dte:DTEElectricMemberdte:InternalGradeOneMemberdte:FinanceLeaseReceivableMember2021-12-310000936340dte:InternalGradeTwoMemberdte:FinanceLeaseReceivableMember2021-12-310000936340dte:InternalGradeTwoMemberdte:DTEElectricMemberdte:FinanceLeaseReceivableMember2021-12-310000936340dte:FinanceLeaseReceivableMember2021-12-310000936340dte:DTEElectricMemberdte:FinanceLeaseReceivableMember2021-12-310000936340dte:DTEElectricandDTEGasMemberus-gaap:AccountsReceivableMember2021-12-310000936340dte:DTEElectricandDTEGasMember2021-01-012021-12-310000936340srt:MinimumMemberus-gaap:NotesReceivableMember2021-12-310000936340srt:MaximumMemberus-gaap:NotesReceivableMember2021-12-310000936340us-gaap:TradeAccountsReceivableMember2020-12-310000936340dte:OtherFinancingReceivablesMember2020-12-310000936340us-gaap:TradeAccountsReceivableMember2021-01-012021-12-310000936340dte:OtherFinancingReceivablesMember2021-01-012021-12-310000936340us-gaap:TradeAccountsReceivableMember2021-12-310000936340dte:OtherFinancingReceivablesMember2021-12-310000936340us-gaap:TradeAccountsReceivableMember2020-01-010000936340dte:OtherFinancingReceivablesMember2020-01-0100009363402020-01-010000936340dte:DTEElectricMember2020-01-010000936340us-gaap:TradeAccountsReceivableMember2020-01-022020-12-310000936340dte:OtherFinancingReceivablesMember2020-01-022020-12-3100009363402020-01-022020-12-310000936340dte:DTEElectricMember2020-01-022020-12-310000936340us-gaap:TradeAccountsReceivableMemberdte:DTMidstreamMemberus-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember2020-01-010000936340us-gaap:FinancialAssetPastDueMember2021-12-310000936340us-gaap:PublicUtilitiesInventoryNaturalGasMember2021-12-310000936340us-gaap:PublicUtilitiesInventoryNaturalGasMember2020-12-310000936340us-gaap:CustomerContractsMembersrt:MinimumMember2021-01-012021-12-310000936340us-gaap:CustomerContractsMembersrt:MaximumMember2021-01-012021-12-310000936340us-gaap:CustomerContractsMember2021-12-310000936340us-gaap:CustomerContractsMember2020-12-310000936340dte:DTMidstreamMember2021-07-012021-07-010000936340us-gaap:SeniorNotesMemberdte:DTMidstreamMember2021-06-300000936340dte:June2021VariableRateTermLoanDue2028Memberdte:DTMidstreamMember2021-06-300000936340dte:DTMidstreamMember2021-06-300000936340srt:AffiliatedEntityMemberdte:DTMidstreamMember2021-06-012021-06-300000936340dte:DTMidstreamMember2021-06-012021-06-3000009363402021-07-012021-09-300000936340srt:MaximumMemberdte:DTMidstreamMemberus-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember2021-07-012021-07-010000936340dte:DTMidstreamMemberus-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember2021-01-012021-12-310000936340dte:DTMidstreamMemberus-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember2020-01-012020-12-310000936340dte:DTMidstreamMemberus-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember2019-01-012019-12-310000936340dte:DTMidstreamMemberus-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember2020-12-310000936340dte:DTMidstreamMemberus-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember2021-12-310000936340dte:DTMidstreamMemberus-gaap:DiscontinuedOperationsDisposedOfByMeansOtherThanSaleSpinoffMember2021-07-012021-07-010000936340dte:DTEVantageMember2021-01-012021-12-310000936340dte:DTEVantageMemberus-gaap:PropertyPlantAndEquipmentMember2021-01-012021-12-310000936340dte:DTEVantageMemberus-gaap:OtherNoncurrentAssetsMember2021-01-012021-12-310000936340dte:SteelIndustryCustomerMember2021-10-012021-12-31xbrli:pure0000936340dte:ResidentialMemberdte:ElectricMember2021-01-012021-12-310000936340dte:ResidentialMemberdte:ElectricMember2020-01-012020-12-310000936340dte:ResidentialMemberdte:ElectricMember2019-01-012019-12-310000936340dte:CommercialMemberdte:ElectricMember2021-01-012021-12-310000936340dte:CommercialMemberdte:ElectricMember2020-01-012020-12-310000936340dte:CommercialMemberdte:ElectricMember2019-01-012019-12-310000936340dte:IndustrialMemberdte:ElectricMember2021-01-012021-12-310000936340dte:IndustrialMemberdte:ElectricMember2020-01-012020-12-310000936340dte:IndustrialMemberdte:ElectricMember2019-01-012019-12-310000936340dte:OtherMemberdte:ElectricMember2021-01-012021-12-310000936340dte:OtherMemberdte:ElectricMember2020-01-012020-12-310000936340dte:OtherMemberdte:ElectricMember2019-01-012019-12-310000936340dte:ElectricMember2021-01-012021-12-310000936340dte:ElectricMember2020-01-012020-12-310000936340dte:ElectricMember2019-01-012019-12-310000936340dte:GasSalesMemberdte:GasMember2021-01-012021-12-310000936340dte:GasSalesMemberdte:GasMember2020-01-012020-12-310000936340dte:GasSalesMemberdte:GasMember2019-01-012019-12-310000936340dte:GasMemberdte:EndUserTransportationMember2021-01-012021-12-310000936340dte:GasMemberdte:EndUserTransportationMember2020-01-012020-12-310000936340dte:GasMemberdte:EndUserTransportationMember2019-01-012019-12-310000936340dte:IntermediateTransportationMemberdte:GasMember2021-01-012021-12-310000936340dte:IntermediateTransportationMemberdte:GasMember2020-01-012020-12-310000936340dte:IntermediateTransportationMemberdte:GasMember2019-01-012019-12-310000936340dte:OtherMemberdte:GasMember2021-01-012021-12-310000936340dte:OtherMemberdte:GasMember2020-01-012020-12-310000936340dte:OtherMemberdte:GasMember2019-01-012019-12-310000936340dte:GasMember2021-01-012021-12-310000936340dte:GasMember2020-01-012020-12-310000936340dte:GasMember2019-01-012019-12-310000936340dte:DTEVantageMember2020-01-012020-12-310000936340dte:DTEVantageMember2019-01-012019-12-310000936340dte:EnergyTradingMember2021-01-012021-12-310000936340dte:EnergyTradingMember2020-01-012020-12-310000936340dte:EnergyTradingMember2019-01-012019-12-310000936340dte:DTESustainableGenerationMemberdte:OtherMemberdte:ElectricMember2021-01-012021-12-310000936340dte:DTESustainableGenerationMemberdte:OtherMemberdte:ElectricMember2020-01-012020-12-310000936340dte:DTESustainableGenerationMemberdte:OtherMemberdte:ElectricMember2019-01-012019-12-3100009363402022-01-012021-12-3100009363402023-01-012021-12-3100009363402024-01-012021-12-3100009363402025-01-012021-12-3100009363402026-01-012021-12-3100009363402027-01-012021-12-310000936340us-gaap:FixedPriceContractMember2022-01-012021-12-310000936340dte:DTEElectricMemberus-gaap:FixedPriceContractMember2022-01-012021-12-3100009363402023-01-01us-gaap:FixedPriceContractMember2021-12-3100009363402023-01-01dte:DTEElectricMemberus-gaap:FixedPriceContractMember2021-12-310000936340us-gaap:FixedPriceContractMember2024-01-012021-12-310000936340dte:DTEElectricMemberus-gaap:FixedPriceContractMember2024-01-012021-12-3100009363402025-01-01us-gaap:FixedPriceContractMember2021-12-3100009363402025-01-01dte:DTEElectricMemberus-gaap:FixedPriceContractMember2021-12-3100009363402026-01-01us-gaap:FixedPriceContractMember2021-12-3100009363402026-01-01dte:DTEElectricMemberus-gaap:FixedPriceContractMember2021-12-310000936340us-gaap:FixedPriceContractMember2027-01-012021-12-310000936340dte:DTEElectricMemberus-gaap:FixedPriceContractMember2027-01-012021-12-310000936340us-gaap:FixedPriceContractMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FixedPriceContractMember2021-12-310000936340dte:DTEElectricMemberdte:ElectricGenerationEquipmentNuclearMember2021-12-310000936340dte:DTEElectricMemberdte:ElectricGenerationEquipmentNuclearMember2020-12-310000936340dte:DTEElectricMemberdte:ElectricGenerationEquipmentRenewablesMember2021-12-310000936340dte:DTEElectricMemberdte:ElectricGenerationEquipmentRenewablesMember2020-12-310000936340dte:ElectricGenerationEquipmentFossilAndOtherMemberdte:DTEElectricMember2021-12-310000936340dte:ElectricGenerationEquipmentFossilAndOtherMemberdte:DTEElectricMember2020-12-310000936340us-gaap:GasDistributionEquipmentMemberdte:DTEElectricMember2021-12-310000936340us-gaap:GasDistributionEquipmentMemberdte:DTEElectricMember2020-12-310000936340dte:PropertyPlantandEquipmentOtherTypesUtilityMemberdte:DTEElectricMember2021-12-310000936340dte:PropertyPlantandEquipmentOtherTypesUtilityMemberdte:DTEElectricMember2020-12-310000936340us-gaap:GasDistributionEquipmentMemberdte:DTEGasMember2021-12-310000936340us-gaap:GasDistributionEquipmentMemberdte:DTEGasMember2020-12-310000936340dte:GasStorageEquipmentMemberdte:DTEGasMember2021-12-310000936340dte:GasStorageEquipmentMemberdte:DTEGasMember2020-12-310000936340dte:GasOtherEquipmentMemberdte:DTEGasMember2021-12-310000936340dte:GasOtherEquipmentMemberdte:DTEGasMember2020-12-310000936340dte:DTEGasMember2021-12-310000936340dte:DTEGasMember2020-12-310000936340dte:PropertyPlantAndEquipmentOtherTypesDTEVantageMember2021-12-310000936340dte:PropertyPlantAndEquipmentOtherTypesDTEVantageMember2020-12-310000936340dte:PropertyPlantandEquipmentOtherTypesNonUtilityMember2021-12-310000936340dte:PropertyPlantandEquipmentOtherTypesNonUtilityMember2020-12-310000936340dte:DTEGasMember2021-01-012021-12-310000936340dte:DTEGasMember2020-01-012020-12-310000936340dte:DTEGasMember2019-01-012019-12-310000936340dte:DTEElectricMember2021-01-012021-12-310000936340dte:DTEElectricMember2020-01-012020-12-310000936340dte:DTEElectricMember2019-01-012019-12-310000936340dte:DTEGasMember2021-01-012021-12-310000936340dte:DTEGasMember2020-01-012020-12-310000936340dte:DTEGasMember2019-01-012019-12-310000936340dte:PropertyPlantandEquipmentOtherTypesUtilityMembersrt:MinimumMemberdte:DTEElectricMember2021-01-012021-12-310000936340dte:PropertyPlantandEquipmentOtherTypesUtilityMembersrt:MaximumMemberdte:DTEElectricMember2021-01-012021-12-310000936340dte:GasOtherEquipmentMembersrt:MinimumMemberdte:DTEGasMember2021-01-012021-12-310000936340dte:GasOtherEquipmentMembersrt:MaximumMemberdte:DTEGasMember2021-01-012021-12-310000936340us-gaap:PropertyPlantAndEquipmentOtherTypesMembersrt:MinimumMember2021-01-012021-12-310000936340us-gaap:PropertyPlantAndEquipmentOtherTypesMembersrt:MaximumMember2021-01-012021-12-310000936340srt:MinimumMemberus-gaap:ComputerSoftwareIntangibleAssetMember2021-01-012021-12-310000936340srt:MinimumMemberdte:DTEElectricMemberus-gaap:ComputerSoftwareIntangibleAssetMember2021-01-012021-12-310000936340srt:MaximumMemberus-gaap:ComputerSoftwareIntangibleAssetMember2021-01-012021-12-310000936340srt:MaximumMemberdte:DTEElectricMemberus-gaap:ComputerSoftwareIntangibleAssetMember2021-01-012021-12-31dte:plant0000936340dte:BelleRiverMemberdte:DTEElectricMember2021-12-31utr:MW0000936340dte:LudingtonHydroelectricPumpedStorageMemberdte:DTEElectricMember2021-12-310000936340dte:BelleRiverMember2021-12-310000936340dte:LudingtonHydroelectricPumpedStorageMember2021-12-310000936340us-gaap:NuclearPlantMember2021-12-310000936340us-gaap:PensionCostsMember2021-12-310000936340us-gaap:PensionCostsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:PensionCostsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:PensionCostsMember2020-12-310000936340us-gaap:PostretirementBenefitCostsMember2021-12-310000936340us-gaap:PostretirementBenefitCostsMember2020-12-310000936340us-gaap:PostretirementBenefitCostsMemberdte:DTEElectricMember2021-12-310000936340us-gaap:PostretirementBenefitCostsMemberdte:DTEElectricMember2020-12-310000936340dte:RecoverableUndepreciatedCostsonRetiringPlantsMember2021-12-310000936340dte:RecoverableUndepreciatedCostsonRetiringPlantsMember2020-12-310000936340dte:RecoverableUndepreciatedCostsonRetiringPlantsMemberdte:DTEElectricMember2021-12-310000936340dte:RecoverableUndepreciatedCostsonRetiringPlantsMemberdte:DTEElectricMember2020-12-310000936340us-gaap:AssetRetirementObligationCostsMember2021-12-310000936340us-gaap:AssetRetirementObligationCostsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:AssetRetirementObligationCostsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:AssetRetirementObligationCostsMember2020-12-310000936340dte:EnhancedTreeTrimmingProgramDeferredCostsMember2021-12-310000936340dte:EnhancedTreeTrimmingProgramDeferredCostsMember2020-12-310000936340dte:EnhancedTreeTrimmingProgramDeferredCostsMemberdte:DTEElectricMember2021-12-310000936340dte:EnhancedTreeTrimmingProgramDeferredCostsMemberdte:DTEElectricMember2020-12-310000936340dte:RecoverableMichiganIncomeTaxesMember2021-12-310000936340dte:RecoverableMichiganIncomeTaxesMember2020-12-310000936340dte:RecoverableMichiganIncomeTaxesMemberdte:DTEElectricMember2021-12-310000936340dte:RecoverableMichiganIncomeTaxesMemberdte:DTEElectricMember2020-12-310000936340dte:AccruedPSCRAndGCRRevenueMember2021-12-310000936340dte:AccruedPSCRAndGCRRevenueMember2020-12-310000936340dte:AccruedPSCRAndGCRRevenueMemberdte:DTEElectricMember2021-12-310000936340dte:AccruedPSCRAndGCRRevenueMemberdte:DTEElectricMember2020-12-310000936340dte:EnergyWasteReductionIncentiveMember2021-12-310000936340dte:EnergyWasteReductionIncentiveMember2020-12-310000936340dte:EnergyWasteReductionIncentiveMemberdte:DTEElectricMember2021-12-310000936340dte:EnergyWasteReductionIncentiveMemberdte:DTEElectricMember2020-12-310000936340dte:RecoverableIncomeTaxesRelatedtoAFUDCEquityMember2021-12-310000936340dte:RecoverableIncomeTaxesRelatedtoAFUDCEquityMember2020-12-310000936340dte:DTEElectricMemberdte:RecoverableIncomeTaxesRelatedtoAFUDCEquityMember2021-12-310000936340dte:DTEElectricMemberdte:RecoverableIncomeTaxesRelatedtoAFUDCEquityMember2020-12-310000936340us-gaap:EnvironmentalRestorationCostsMember2021-12-310000936340us-gaap:EnvironmentalRestorationCostsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:EnvironmentalRestorationCostsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:EnvironmentalRestorationCostsMember2020-12-310000936340us-gaap:LossOnReacquiredDebtMember2021-12-310000936340us-gaap:LossOnReacquiredDebtMember2020-12-310000936340dte:DTEElectricMemberus-gaap:LossOnReacquiredDebtMember2021-12-310000936340dte:DTEElectricMemberus-gaap:LossOnReacquiredDebtMember2020-12-310000936340dte:Customer360DeferredCostsMember2021-12-310000936340dte:Customer360DeferredCostsMember2020-12-310000936340dte:Customer360DeferredCostsMemberdte:DTEElectricMember2021-12-310000936340dte:Customer360DeferredCostsMemberdte:DTEElectricMember2020-12-310000936340dte:NuclearPerformanceEvaluationAndReviewCommitteeTrackerMember2021-12-310000936340dte:NuclearPerformanceEvaluationAndReviewCommitteeTrackerMember2020-12-310000936340dte:DTEElectricMemberdte:NuclearPerformanceEvaluationAndReviewCommitteeTrackerMember2021-12-310000936340dte:DTEElectricMemberdte:NuclearPerformanceEvaluationAndReviewCommitteeTrackerMember2020-12-310000936340dte:PensionandOtherPostretirementPlansCostsNonServiceComponentMember2021-12-310000936340dte:PensionandOtherPostretirementPlansCostsNonServiceComponentMember2020-12-310000936340dte:DTEElectricMemberdte:PensionandOtherPostretirementPlansCostsNonServiceComponentMember2021-12-310000936340dte:DTEElectricMemberdte:PensionandOtherPostretirementPlansCostsNonServiceComponentMember2020-12-310000936340dte:EnergyWasteReductionMember2021-12-310000936340dte:EnergyWasteReductionMember2020-12-310000936340dte:EnergyWasteReductionMemberdte:DTEElectricMember2021-12-310000936340dte:EnergyWasteReductionMemberdte:DTEElectricMember2020-12-310000936340dte:OtherRecoverabeIncomeTaxesMember2021-12-310000936340dte:OtherRecoverabeIncomeTaxesMember2020-12-310000936340dte:OtherRecoverabeIncomeTaxesMemberdte:DTEElectricMember2021-12-310000936340dte:OtherRecoverabeIncomeTaxesMemberdte:DTEElectricMember2020-12-310000936340dte:TransitionalReconciliationMechanismMember2021-12-310000936340dte:TransitionalReconciliationMechanismMember2020-12-310000936340dte:TransitionalReconciliationMechanismMemberdte:DTEElectricMember2021-12-310000936340dte:TransitionalReconciliationMechanismMemberdte:DTEElectricMember2020-12-310000936340us-gaap:OtherAssetsMember2021-12-310000936340us-gaap:OtherAssetsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:OtherAssetsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:OtherAssetsMember2020-12-310000936340dte:RefundableFederalIncomeTaxesMember2021-12-310000936340dte:RefundableFederalIncomeTaxesMember2020-12-310000936340dte:DTEElectricMemberdte:RefundableFederalIncomeTaxesMember2021-12-310000936340dte:DTEElectricMemberdte:RefundableFederalIncomeTaxesMember2020-12-310000936340us-gaap:RemovalCostsMember2021-12-310000936340us-gaap:RemovalCostsMember2020-12-310000936340us-gaap:RemovalCostsMemberdte:DTEElectricMember2021-12-310000936340us-gaap:RemovalCostsMemberdte:DTEElectricMember2020-12-310000936340us-gaap:PostretirementBenefitCostsMember2021-12-310000936340us-gaap:PostretirementBenefitCostsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:PostretirementBenefitCostsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:PostretirementBenefitCostsMember2020-12-310000936340dte:PensionandOtherPostretirementPlansCostsNonServiceComponentMember2021-12-310000936340dte:PensionandOtherPostretirementPlansCostsNonServiceComponentMember2020-12-310000936340dte:PensionandOtherPostretirementPlansCostsNonServiceComponentMemberdte:DTEElectricMember2021-12-310000936340dte:PensionandOtherPostretirementPlansCostsNonServiceComponentMemberdte:DTEElectricMember2020-12-310000936340dte:IncrementalTreeTrimSurgeMember2021-12-310000936340dte:IncrementalTreeTrimSurgeMember2020-12-310000936340dte:IncrementalTreeTrimSurgeMemberdte:DTEElectricMember2021-12-310000936340dte:IncrementalTreeTrimSurgeMemberdte:DTEElectricMember2020-12-310000936340dte:COVID19VoluntaryRefundMember2021-12-310000936340dte:COVID19VoluntaryRefundMember2020-12-310000936340dte:DTEElectricMemberdte:COVID19VoluntaryRefundMember2021-12-310000936340dte:DTEElectricMemberdte:COVID19VoluntaryRefundMember2020-12-310000936340dte:EnergyWasteReductionMember2021-12-310000936340dte:EnergyWasteReductionMember2020-12-310000936340dte:EnergyWasteReductionMemberdte:DTEElectricMember2021-12-310000936340dte:EnergyWasteReductionMemberdte:DTEElectricMember2020-12-310000936340us-gaap:RenewableEnergyProgramMember2021-12-310000936340us-gaap:RenewableEnergyProgramMember2020-12-310000936340dte:DTEElectricMemberus-gaap:RenewableEnergyProgramMember2021-12-310000936340dte:DTEElectricMemberus-gaap:RenewableEnergyProgramMember2020-12-310000936340us-gaap:OtherLiabilitiesMember2021-12-310000936340us-gaap:OtherLiabilitiesMember2020-12-310000936340us-gaap:OtherLiabilitiesMemberdte:DTEElectricMember2021-12-310000936340us-gaap:OtherLiabilitiesMemberdte:DTEElectricMember2020-12-310000936340dte:RecoverableUndepreciatedCostsonRetiringPlantsMemberdte:MPSCMemberdte:DTEElectricMember2021-06-230000936340dte:EnhancedTreeTrimmingProgramDeferredCostsMemberdte:MPSCMemberdte:DTEElectricMember2021-06-230000936340dte:Customer360DeferredCostsMember2021-01-012021-12-310000936340dte:NuclearPerformanceEvaluationAndReviewCommitteeTrackerMember2021-01-012021-12-310000936340dte:MPSCMemberdte:DTEElectricMember2020-07-090000936340dte:IncrementalTreeTrimSurgeMemberdte:MPSCMemberdte:DTEElectricMember2021-08-310000936340dte:IncrementalTreeTrimSurgeMemberdte:MPSCMembersrt:MinimumMemberdte:DTEElectricMember2021-11-040000936340dte:IncrementalTreeTrimSurgeMemberdte:MPSCMemberdte:DTEElectricMember2021-12-270000936340dte:IncrementalTreeTrimSurgeMemberdte:MPSCMemberdte:DTEElectricMember2021-12-280000936340dte:MPSCMemberdte:DTEElectricMember2021-03-260000936340dte:MPSCMemberdte:DTEElectricMember2021-06-230000936340dte:MPSCMemberdte:DTEGasRateCaseFiling2021Memberdte:DTEGasMember2021-02-122021-02-120000936340dte:MPSCMemberdte:DTEGasRateCaseFiling2021Memberdte:DTEGasMember2021-12-092021-12-090000936340dte:MPSCMemberdte:DTEElectricMemberus-gaap:SubsequentEventMemberdte:DTEElectricRateCaseFiling2022Member2022-01-212022-01-210000936340us-gaap:DomesticCountryMember2021-12-310000936340dte:OperatingLossCarryforwardsStateAndLocalMember2021-12-310000936340dte:OperatingLossCarryforwardsStateAndLocalMember2020-12-310000936340dte:CharitableContributionCarryforwardsMember2021-01-012021-12-310000936340us-gaap:GeneralBusinessMemberdte:DTEElectricMember2021-12-310000936340us-gaap:DomesticCountryMemberdte:DTEElectricMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:EquitySecuritiesMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:EquitySecuritiesMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PrivateEquityFundsMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PrivateEquityFundsMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:HedgeFundsMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:HedgeFundsMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CashEquivalentsMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CashEquivalentsMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberdte:NaturalGasCommodityContractMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberdte:NaturalGasCommodityContractMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberdte:NaturalGasCommodityContractMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:NaturalGasCommodityContractMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberdte:NaturalGasCommodityContractMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberdte:NaturalGasCommodityContractMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberdte:NaturalGasCommodityContractMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:NaturalGasCommodityContractMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberdte:ElectricityCommodityContractMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberdte:ElectricityCommodityContractMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:ElectricityCommodityContractMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:ElectricityCommodityContractMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberdte:ElectricityCommodityContractMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberdte:ElectricityCommodityContractMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:ElectricityCommodityContractMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:ElectricityCommodityContractMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberdte:EnvironmentalandOtherCommodityContractMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberdte:EnvironmentalandOtherCommodityContractMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberdte:EnvironmentalandOtherCommodityContractMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:EnvironmentalandOtherCommodityContractMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMemberdte:EnvironmentalandOtherCommodityContractMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMemberdte:EnvironmentalandOtherCommodityContractMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberdte:EnvironmentalandOtherCommodityContractMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:EnvironmentalandOtherCommodityContractMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:CurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:CurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340dte:CurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340dte:CurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:CurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:CurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340dte:CurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340dte:CurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:NoncurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:NoncurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340dte:NoncurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340dte:NoncurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340dte:NoncurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:NoncurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:NoncurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340dte:NoncurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340dte:NoncurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340dte:NoncurrentAssetMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:CurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:CurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340dte:CurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340dte:CurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:CurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:CurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340dte:CurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340dte:CurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:NoncurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:NoncurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340dte:NoncurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340dte:NoncurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:NoncurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:NoncurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340dte:NoncurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340dte:NoncurrentDerivativeLiabilityMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:RestrictedCashMember2021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:RestrictedCashMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:EquitySecuritiesMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EquitySecuritiesMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:EquitySecuritiesMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:EquitySecuritiesMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FixedIncomeSecuritiesMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PrivateEquityFundsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PrivateEquityFundsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:PrivateEquityFundsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:HedgeFundsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:HedgeFundsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:HedgeFundsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CashEquivalentsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberus-gaap:CashEquivalentsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:CashEquivalentsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberdte:FinancialTransmissionRightsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberdte:FinancialTransmissionRightsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberdte:FinancialTransmissionRightsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberdte:FinancialTransmissionRightsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberdte:FinancialTransmissionRightsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberdte:FinancialTransmissionRightsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Memberdte:FinancialTransmissionRightsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberdte:FinancialTransmissionRightsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:CurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:CurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340dte:CurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340dte:CurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:CurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:CurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340dte:CurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340dte:CurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:NoncurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:NoncurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340dte:NoncurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340dte:NoncurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340dte:NoncurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:NoncurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:NoncurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340dte:NoncurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340dte:NoncurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340dte:NoncurrentAssetMemberdte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340srt:MinimumMemberdte:EquityOrDebtSecuritiesMember2021-01-012021-12-310000936340srt:MaximumMemberdte:EquityOrDebtSecuritiesMember2021-01-012021-12-310000936340srt:MinimumMemberus-gaap:PrivateEquityFundsMember2021-01-012021-12-310000936340srt:MaximumMemberus-gaap:PrivateEquityFundsMember2021-01-012021-12-310000936340us-gaap:PrivateEquityFundsMember2021-12-310000936340us-gaap:PrivateEquityFundsMember2020-12-310000936340dte:OtherCommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:NaturalGasCommodityContractMember2019-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:ElectricityCommodityContractMember2019-12-310000936340dte:OtherCommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310000936340us-gaap:FairValueMeasurementsRecurringMember2019-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:NaturalGasCommodityContractMember2021-01-012021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:ElectricityCommodityContractMember2021-01-012021-12-310000936340dte:OtherCommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-01-012021-12-310000936340us-gaap:FairValueMeasurementsRecurringMember2021-01-012021-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:NaturalGasCommodityContractMember2020-01-012020-12-310000936340us-gaap:FairValueMeasurementsRecurringMemberdte:ElectricityCommodityContractMember2020-01-012020-12-310000936340dte:OtherCommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2020-01-012020-12-310000936340us-gaap:FairValueMeasurementsRecurringMember2020-01-012020-12-310000936340dte:OtherCommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2021-01-012021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueMeasurementsRecurringMember2020-01-012020-12-310000936340us-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMemberdte:NaturalGasCommodityContractMemberus-gaap:FairValueInputsLevel3Member2021-12-31iso4217:USDutr:MMBTU0000936340us-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMemberdte:NaturalGasCommodityContractMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340srt:WeightedAverageMemberus-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberdte:NaturalGasCommodityContractMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340us-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMemberdte:ElectricityCommodityContractMemberus-gaap:FairValueInputsLevel3Member2021-12-31iso4217:USDutr:MWh0000936340us-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMemberdte:ElectricityCommodityContractMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340srt:WeightedAverageMemberus-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberdte:ElectricityCommodityContractMemberus-gaap:FairValueInputsLevel3Member2021-12-310000936340us-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMemberdte:NaturalGasCommodityContractMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340us-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMemberdte:NaturalGasCommodityContractMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340srt:WeightedAverageMemberus-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberdte:NaturalGasCommodityContractMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340us-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MinimumMemberdte:ElectricityCommodityContractMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340us-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMembersrt:MaximumMemberdte:ElectricityCommodityContractMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340srt:WeightedAverageMemberus-gaap:MeasurementInputCommodityForwardPriceMemberus-gaap:ValuationTechniqueDiscountedCashFlowMemberdte:ElectricityCommodityContractMemberus-gaap:FairValueInputsLevel3Member2020-12-310000936340us-gaap:CarryingReportedAmountFairValueDisclosureMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310000936340us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310000936340us-gaap:CarryingReportedAmountFairValueDisclosureMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000936340us-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000936340dte:DTEElectricMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310000936340dte:DTEElectricMemberus-gaap:CarryingReportedAmountFairValueDisclosureMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueInputsLevel3Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000936340dte:DTEElectricMemberus-gaap:CarryingReportedAmountFairValueDisclosureMembersrt:AffiliatedEntityMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMembersrt:AffiliatedEntityMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMembersrt:AffiliatedEntityMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FairValueInputsLevel3Membersrt:AffiliatedEntityMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2021-12-310000936340dte:DTEElectricMemberus-gaap:CarryingReportedAmountFairValueDisclosureMembersrt:AffiliatedEntityMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:DTEElectricMembersrt:AffiliatedEntityMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:DTEElectricMembersrt:AffiliatedEntityMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FairValueInputsLevel3Membersrt:AffiliatedEntityMemberus-gaap:EstimateOfFairValueFairValueDisclosureMember2020-12-310000936340us-gaap:NuclearPlantMemberdte:DTEElectricMemberdte:NuclearDecommissioningTrustFundMember2021-12-310000936340us-gaap:NuclearPlantMemberdte:DTEElectricMemberdte:NuclearDecommissioningTrustFundMember2020-12-310000936340dte:DTEElectricMemberdte:NuclearDecommissioningTrustFundMemberdte:NuclearPlant1Member2021-12-310000936340dte:DTEElectricMemberdte:NuclearDecommissioningTrustFundMemberdte:NuclearPlant1Member2020-12-310000936340dte:LowLevelRadioactiveWasteMemberdte:DTEElectricMemberdte:NuclearDecommissioningTrustFundMember2021-12-310000936340dte:LowLevelRadioactiveWasteMemberdte:DTEElectricMemberdte:NuclearDecommissioningTrustFundMember2020-12-310000936340dte:DTEElectricMemberdte:NuclearDecommissioningTrustFundMember2021-12-310000936340dte:DTEElectricMemberdte:NuclearDecommissioningTrustFundMember2020-12-310000936340dte:DTEElectricMemberdte:NuclearDecommissioningTrustFundMember2021-01-012021-12-310000936340dte:DTEElectricMemberdte:NuclearDecommissioningTrustFundMember2020-01-012020-12-310000936340dte:DTEElectricMemberdte:NuclearDecommissioningTrustFundMember2019-01-012019-12-310000936340dte:DTEElectricMemberus-gaap:EquitySecuritiesMember2021-12-310000936340dte:DTEElectricMemberus-gaap:EquitySecuritiesMember2020-12-310000936340dte:DTEElectricMemberus-gaap:FixedIncomeSecuritiesMember2021-12-310000936340dte:DTEElectricMemberus-gaap:FixedIncomeSecuritiesMember2020-12-310000936340dte:DTEElectricMemberus-gaap:PrivateEquityFundsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:PrivateEquityFundsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:HedgeFundsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:HedgeFundsMember2020-12-310000936340dte:DTEElectricMemberus-gaap:CashEquivalentsMember2021-12-310000936340dte:DTEElectricMemberus-gaap:CashEquivalentsMember2020-12-310000936340us-gaap:FixedIncomeSecuritiesMemberdte:NuclearDecommissioningTrustFundMember2021-12-310000936340us-gaap:EquitySecuritiesMember2021-01-012021-12-310000936340us-gaap:EquitySecuritiesMember2020-01-012020-12-310000936340us-gaap:EquitySecuritiesMember2019-01-012019-12-310000936340us-gaap:FixedIncomeSecuritiesMember2021-01-012021-12-310000936340us-gaap:FixedIncomeSecuritiesMember2020-01-012020-12-310000936340us-gaap:FixedIncomeSecuritiesMember2019-01-012019-12-310000936340us-gaap:AssetHeldInTrustMember2021-01-012021-12-310000936340us-gaap:AssetHeldInTrustMember2020-01-012020-12-310000936340us-gaap:AssetHeldInTrustMember2019-01-012019-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2021-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2020-12-310000936340us-gaap:NondesignatedMemberdte:NaturalGasCommodityContractMember2021-12-310000936340us-gaap:NondesignatedMemberdte:NaturalGasCommodityContractMember2020-12-310000936340us-gaap:NondesignatedMemberdte:ElectricityCommodityContractMember2021-12-310000936340us-gaap:NondesignatedMemberdte:ElectricityCommodityContractMember2020-12-310000936340us-gaap:NondesignatedMemberdte:EnvironmentalandOtherCommodityContractMember2021-12-310000936340us-gaap:NondesignatedMemberdte:EnvironmentalandOtherCommodityContractMember2020-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMember2021-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:NondesignatedMember2020-12-310000936340us-gaap:NondesignatedMember2021-12-310000936340us-gaap:NondesignatedMember2020-12-310000936340dte:CurrentDerivativeAssetMember2021-12-310000936340dte:CurrentDerivativeLiabilityMember2021-12-310000936340dte:CurrentDerivativeAssetMember2020-12-310000936340dte:CurrentDerivativeLiabilityMember2020-12-310000936340dte:NoncurrentDerivativeAssetMember2021-12-310000936340dte:NoncurrentDerivativeLiabilityMember2021-12-310000936340dte:NoncurrentDerivativeAssetMember2020-12-310000936340dte:NoncurrentDerivativeLiabilityMember2020-12-310000936340us-gaap:OtherCurrentAssetsMemberus-gaap:NondesignatedMemberdte:DTEElectricMemberdte:FinancialTransmissionRightsMember2021-12-310000936340us-gaap:OtherCurrentAssetsMemberus-gaap:NondesignatedMemberdte:DTEElectricMemberdte:FinancialTransmissionRightsMember2020-12-310000936340dte:NaturalGasCommodityContractMember2021-12-310000936340dte:NaturalGasCommodityContractMember2020-12-310000936340dte:ElectricityCommodityContractMember2021-12-310000936340dte:ElectricityCommodityContractMember2020-12-310000936340dte:EnvironmentalandOtherCommodityContractMember2021-12-310000936340dte:EnvironmentalandOtherCommodityContractMember2020-12-310000936340us-gaap:ForeignExchangeContractMember2021-12-310000936340us-gaap:ForeignExchangeContractMember2020-12-310000936340us-gaap:SalesMemberdte:NaturalGasCommodityContractMember2021-01-012021-12-310000936340us-gaap:SalesMemberdte:NaturalGasCommodityContractMember2020-01-012020-12-310000936340us-gaap:SalesMemberdte:NaturalGasCommodityContractMember2019-01-012019-12-310000936340srt:FuelMemberdte:NaturalGasCommodityContractMember2021-01-012021-12-310000936340srt:FuelMemberdte:NaturalGasCommodityContractMember2020-01-012020-12-310000936340srt:FuelMemberdte:NaturalGasCommodityContractMember2019-01-012019-12-310000936340us-gaap:SalesMemberdte:ElectricityCommodityContractMember2021-01-012021-12-310000936340us-gaap:SalesMemberdte:ElectricityCommodityContractMember2020-01-012020-12-310000936340us-gaap:SalesMemberdte:ElectricityCommodityContractMember2019-01-012019-12-310000936340us-gaap:SalesMemberdte:EnvironmentalandOtherCommodityContractMember2021-01-012021-12-310000936340us-gaap:SalesMemberdte:EnvironmentalandOtherCommodityContractMember2020-01-012020-12-310000936340us-gaap:SalesMemberdte:EnvironmentalandOtherCommodityContractMember2019-01-012019-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:SalesMember2021-01-012021-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:SalesMember2020-01-012020-12-310000936340us-gaap:ForeignExchangeContractMemberus-gaap:SalesMember2019-01-012019-12-310000936340dte:NaturalGasCommodityContractMember2021-01-012021-12-31utr:MMBTU0000936340dte:ElectricityCommodityContractMember2021-01-012021-12-31utr:MWhiso4217:CAD0000936340dte:RenewableEnergyCommodityContractMember2021-01-012021-12-310000936340dte:CarbonEmissionsCommodityContractMember2021-01-012021-12-31utr:T0000936340us-gaap:UnsecuredDebtMember2021-12-310000936340us-gaap:UnsecuredDebtMember2020-12-310000936340us-gaap:SecuredDebtMemberdte:DTEElectricMember2021-12-310000936340us-gaap:SecuredDebtMemberdte:DTEElectricMember2020-12-310000936340us-gaap:SecuredDebtMemberdte:DTEGasMember2021-12-310000936340us-gaap:SecuredDebtMemberdte:DTEGasMember2020-12-310000936340dte:SecuredDebtUnsecuredDebtMortgageNotesandOtherDebtMember2021-12-310000936340dte:SecuredDebtUnsecuredDebtMortgageNotesandOtherDebtMember2020-12-310000936340us-gaap:JuniorSubordinatedDebtMember2021-12-310000936340us-gaap:JuniorSubordinatedDebtMember2020-12-310000936340dte:DTEElectricMemberdte:SecuredDebtUnsecuredDebtMortgageNotesandOtherDebtMember2021-12-310000936340dte:DTEElectricMemberdte:SecuredDebtUnsecuredDebtMortgageNotesandOtherDebtMember2020-12-310000936340dte:DTEElectricMemberus-gaap:MortgagesMemberdte:March2021190MortgageBondsMaturingIn2028Member2021-03-310000936340dte:DTEElectricMemberus-gaap:MortgagesMemberdte:March2021325MortgageBondsMaturingIn2051Member2021-03-310000936340us-gaap:SeniorNotesMemberdte:June20214125SeniorNotesDue2029Memberdte:DTMidstreamMember2021-06-300000936340us-gaap:SeniorNotesMemberdte:June20214375SeniorNotesDue2031Memberdte:DTMidstreamMember2021-06-300000936340dte:November2021207MortgageBondsDue2031Memberus-gaap:MortgagesMemberdte:DTEGasMember2021-11-300000936340us-gaap:MortgagesMemberdte:November2021285MortgageBondsDue2051Memberdte:DTEGasMember2021-11-300000936340dte:November2021438JuniorSubordinatedDebenturesDue2081Memberus-gaap:JuniorSubordinatedDebtMember2021-11-300000936340dte:SeriesF20166.00JuniorSubordinatedDebenturesDue2076Memberus-gaap:JuniorSubordinatedDebtMember2021-12-012021-12-310000936340dte:SeriesF20166.00JuniorSubordinatedDebenturesDue2076Memberus-gaap:JuniorSubordinatedDebtMember2021-12-310000936340dte:A145RevenueBondsMaturingIn2030Memberdte:TaxExemptRevenueBondsMemberdte:DTEElectricMember2021-12-310000936340dte:A145RevenueBondsMaturingIn2030Memberdte:TaxExemptRevenueBondsMemberdte:DTEElectricMember2021-09-300000936340dte:A135RevenueBondsMaturingIn2029Memberdte:TaxExemptRevenueBondsMemberdte:DTEElectricMember2021-12-310000936340dte:A135RevenueBondsMaturingIn2029Memberdte:TaxExemptRevenueBondsMemberdte:DTEElectricMember2021-09-300000936340dte:DTEElectricMemberus-gaap:MortgagesMemberdte:SeriesB2011390GeneralAndRefundingMortgageBondsMember2021-04-300000936340dte:DTEElectricMemberus-gaap:MortgagesMemberdte:SeriesB2011390GeneralAndRefundingMortgageBondsMember2021-04-012021-04-300000936340dte:DTEElectricMemberus-gaap:MortgagesMemberdte:A700MortgageBondsDueIn2021Member2021-05-310000936340dte:DTEElectricMemberus-gaap:MortgagesMemberdte:A700MortgageBondsDueIn2021Member2021-05-012021-05-310000936340us-gaap:JuniorSubordinatedDebtMemberdte:SeriesB20165.375JuniorSubordinatedDebenturesDue2076Member2021-06-300000936340us-gaap:JuniorSubordinatedDebtMemberdte:SeriesB20165.375JuniorSubordinatedDebenturesDue2076Member2021-06-012021-06-300000936340dte:A330SeniorNotesDueIn2022Memberus-gaap:SeniorNotesMember2021-07-310000936340dte:A330SeniorNotesDueIn2022Memberus-gaap:SeniorNotesMember2021-07-012021-07-310000936340us-gaap:SeniorNotesMemberdte:A260SeniorNotesDueIn2022Member2021-07-310000936340us-gaap:SeniorNotesMemberdte:A260SeniorNotesDueIn2022Member2021-07-012021-07-310000936340us-gaap:SeniorNotesMemberdte:A370SeniorNotesDueIn2023Member2021-07-310000936340us-gaap:SeniorNotesMemberdte:A370SeniorNotesDueIn2023Member2021-07-012021-07-310000936340us-gaap:SeniorNotesMemberdte:A385SeniorNotesDueIn2023Member2021-07-310000936340us-gaap:SeniorNotesMemberdte:A385SeniorNotesDueIn2023Member2021-07-012021-07-310000936340us-gaap:SeniorNotesMemberdte:A350SeniorNotesDueIn2024Member2021-07-310000936340us-gaap:SeniorNotesMemberdte:A350SeniorNotesDueIn2024Member2021-07-012021-07-310000936340us-gaap:SeniorNotesMemberdte:A380SeniorNotesDueIn2027Member2021-07-310000936340us-gaap:SeniorNotesMemberdte:A380SeniorNotesDueIn2027Member2021-07-012021-07-310000936340us-gaap:SeniorNotesMemberdte:A340SeniorNotesDueIn2029Member2021-07-310000936340us-gaap:SeniorNotesMemberdte:A340SeniorNotesDueIn2029Member2021-07-012021-07-310000936340us-gaap:SeniorNotesMemberdte:A6375SeniorNotesDueIn2033Member2021-07-310000936340us-gaap:SeniorNotesMemberdte:A6375SeniorNotesDueIn2033Member2021-07-012021-07-310000936340us-gaap:SeniorNotesMemberdte:A385SeniorNotesDueIn2023Member2021-08-310000936340us-gaap:SeniorNotesMemberdte:A385SeniorNotesDueIn2023Member2021-08-012021-08-310000936340us-gaap:SeniorNotesMemberdte:A6375SeniorNotesDueIn2033Member2021-08-310000936340us-gaap:SeniorNotesMemberdte:A6375SeniorNotesDueIn2033Member2021-08-012021-08-310000936340dte:A690SeniorNotesDueIn2021Memberdte:DTEElectricMemberus-gaap:MortgagesMember2021-08-310000936340dte:A690SeniorNotesDueIn2021Memberdte:DTEElectricMemberus-gaap:MortgagesMember2021-08-012021-08-310000936340us-gaap:JuniorSubordinatedDebtMember2021-01-012021-12-310000936340us-gaap:SeniorNotesMember2021-07-012021-09-300000936340dte:EquityUnitsMemberdte:November2019SeriesF2.25RSNsMaturing2025Member2019-11-010000936340dte:EquityUnitsSubjecttoMandatoryRedemptionMember2019-11-012019-11-0100009363402019-11-010000936340dte:AntiDilutionScenarioOneMemberdte:EquityUnitsSubjecttoMandatoryRedemptionMember2021-07-012021-07-31dte:day0000936340srt:MinimumMemberdte:AntiDilutionScenarioOneMemberdte:EquityUnitsSubjecttoMandatoryRedemptionMember2021-07-310000936340dte:AntiDilutionScenarioOneMemberdte:EquityUnitsSubjecttoMandatoryRedemptionMember2021-07-310000936340srt:MaximumMemberdte:AntiDilutionScenarioTwoMemberdte:EquityUnitsSubjecttoMandatoryRedemptionMember2021-07-310000936340srt:MaximumMemberdte:AntiDilutionScenarioThreeMemberdte:EquityUnitsSubjecttoMandatoryRedemptionMember2021-07-310000936340dte:AntiDilutionScenarioTwoMemberdte:EquityUnitsSubjecttoMandatoryRedemptionMember2021-07-310000936340dte:AntiDilutionScenarioThreeMemberdte:EquityUnitsSubjecttoMandatoryRedemptionMember2021-07-310000936340us-gaap:DebtInstrumentRedemptionPeriodOneMemberdte:EquityUnitsMemberdte:November2019SeriesF2.25RSNsMaturing2025Member2019-11-012019-11-010000936340dte:EquityUnitsSubjecttoMandatoryRedemptionMember2020-02-012020-02-010000936340dte:EquityUnitsSubjecttoMandatoryRedemptionMember2020-02-010000936340srt:MinimumMemberdte:EquityUnitsSubjecttoMandatoryRedemptionMembersrt:ScenarioForecastMember2022-11-300000936340srt:MaximumMemberdte:EquityUnitsSubjecttoMandatoryRedemptionMembersrt:ScenarioForecastMember2022-11-300000936340dte:EquityUnitsSubjecttoMandatoryRedemptionMember2021-12-310000936340dte:EquityUnitsSubjecttoMandatoryRedemptionMember2019-11-0100009363402019-11-012019-11-010000936340dte:EquityUnitsSubjecttoMandatoryRedemptionMember2021-01-012021-12-310000936340dte:EquityUnitsSubjecttoMandatoryRedemptionMember2020-01-012020-12-310000936340dte:EquityUnitsSubjecttoMandatoryRedemptionMember2020-12-310000936340srt:ParentCompanyMember2021-12-310000936340us-gaap:UnsecuredDebtMemberdte:December2021UnsecuredTermLoanDueJune2022Member2021-12-310000936340srt:MaximumMember2021-06-300000936340srt:MaximumMember2021-09-300000936340us-gaap:RevolvingCreditFacilityMemberdte:UnsecuredRevolvingCreditFacilityExpiringInApril2025Membersrt:ParentCompanyMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:UnsecuredRevolvingCreditFacilityExpiringInApril2025Memberdte:DTEElectricMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:UnsecuredRevolvingCreditFacilityExpiringInApril2025Memberdte:DTEGasMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:UnsecuredRevolvingCreditFacilityExpiringInApril2025Member2021-12-310000936340us-gaap:UnsecuredDebtMemberdte:December2021UnsecuredTermLoanDueJune2022Membersrt:ParentCompanyMember2021-12-310000936340us-gaap:UnsecuredDebtMemberdte:DTEElectricMemberdte:December2021UnsecuredTermLoanDueJune2022Member2021-12-310000936340us-gaap:UnsecuredDebtMemberdte:December2021UnsecuredTermLoanDueJune2022Memberdte:DTEGasMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMembersrt:ParentCompanyMemberdte:UnsecuredCanadianRevolvingCreditFacilityExpiringMay2023Member2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:DTEElectricMemberdte:UnsecuredCanadianRevolvingCreditFacilityExpiringMay2023Member2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:UnsecuredCanadianRevolvingCreditFacilityExpiringMay2023Memberdte:DTEGasMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:UnsecuredCanadianRevolvingCreditFacilityExpiringMay2023Member2021-12-310000936340dte:UnsecuredLetterOfCreditFacilityExpiringInFebruary2023Memberus-gaap:LetterOfCreditMembersrt:ParentCompanyMember2021-12-310000936340dte:UnsecuredLetterOfCreditFacilityExpiringInFebruary2023Memberdte:DTEElectricMemberus-gaap:LetterOfCreditMember2021-12-310000936340dte:UnsecuredLetterOfCreditFacilityExpiringInFebruary2023Memberus-gaap:LetterOfCreditMemberdte:DTEGasMember2021-12-310000936340dte:UnsecuredLetterOfCreditFacilityExpiringInFebruary2023Memberus-gaap:LetterOfCreditMember2021-12-310000936340us-gaap:LetterOfCreditMemberdte:UnsecuredLetterOfCreditFacilityExpiringInJuly2023Membersrt:ParentCompanyMember2021-12-310000936340dte:DTEElectricMemberus-gaap:LetterOfCreditMemberdte:UnsecuredLetterOfCreditFacilityExpiringInJuly2023Member2021-12-310000936340us-gaap:LetterOfCreditMemberdte:UnsecuredLetterOfCreditFacilityExpiringInJuly2023Memberdte:DTEGasMember2021-12-310000936340us-gaap:LetterOfCreditMemberdte:UnsecuredLetterOfCreditFacilityExpiringInJuly2023Member2021-12-310000936340us-gaap:LetterOfCreditMemberdte:UnsecuredLetterOfCreditFacilityAutomaticRenewalEachJulyMembersrt:ParentCompanyMember2021-12-310000936340dte:DTEElectricMemberus-gaap:LetterOfCreditMemberdte:UnsecuredLetterOfCreditFacilityAutomaticRenewalEachJulyMember2021-12-310000936340us-gaap:LetterOfCreditMemberdte:UnsecuredLetterOfCreditFacilityAutomaticRenewalEachJulyMemberdte:DTEGasMember2021-12-310000936340us-gaap:LetterOfCreditMemberdte:UnsecuredLetterOfCreditFacilityAutomaticRenewalEachJulyMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMembersrt:ParentCompanyMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:DTEElectricMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:DTEGasMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMember2021-12-310000936340us-gaap:CommercialPaperMembersrt:ParentCompanyMember2021-12-310000936340dte:DTEElectricMemberus-gaap:CommercialPaperMember2021-12-310000936340us-gaap:CommercialPaperMemberdte:DTEGasMember2021-12-310000936340us-gaap:CommercialPaperMember2021-12-310000936340us-gaap:LetterOfCreditMembersrt:ParentCompanyMember2021-12-310000936340dte:DTEElectricMemberus-gaap:LetterOfCreditMember2021-12-310000936340us-gaap:LetterOfCreditMemberdte:DTEGasMember2021-12-310000936340us-gaap:LetterOfCreditMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:UnsecuredRevolvingCreditFacilityExpiringInApril2024Member2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:UnsecuredRevolvingCreditFacilityExpiringInApril2024Membersrt:ParentCompanyMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:UnsecuredRevolvingCreditFacilityExpiringInApril2024Memberdte:DTEElectricMember2021-12-310000936340us-gaap:RevolvingCreditFacilityMemberdte:UnsecuredRevolvingCreditFacilityExpiringInApril2024Memberdte:DTEGasMember2021-12-310000936340dte:DemandFinancingAgreementIndefiniteTermMembersrt:ParentCompanyMemberdte:DemandFinancingAgreementMember2021-12-310000936340dte:DemandFinancingAgreementExpiringIn2022Membersrt:ParentCompanyMemberdte:DemandFinancingAgreementMember2021-12-310000936340srt:ParentCompanyMemberdte:DemandFinancingAgreementMember2021-12-310000936340srt:ParentCompanyMemberdte:DemandFinancingAgreementMember2020-12-310000936340srt:MinimumMember2021-01-012021-12-310000936340srt:MaximumMember2021-01-012021-12-310000936340srt:MinimumMemberdte:DTEElectricMember2021-01-012021-12-310000936340srt:MaximumMemberdte:DTEElectricMember2021-01-012021-12-3100009363402021-01-012021-03-310000936340srt:MinimumMember2021-12-310000936340srt:MaximumMember2021-12-310000936340dte:RegulatedandUnregulatedOperatingRevenueMember2021-01-012021-12-310000936340dte:RegulatedandUnregulatedOperatingRevenueMember2020-01-012020-12-310000936340dte:RegulatedandUnregulatedOperatingRevenueMember2019-01-012019-12-310000936340us-gaap:OtherIncomeMember2021-01-012021-12-310000936340us-gaap:OtherIncomeMember2020-01-012020-12-310000936340us-gaap:OtherIncomeMember2019-01-012019-12-310000936340dte:ReductionOfCarbonEmissionsBy2023Member2021-01-012021-12-310000936340dte:ReductionOfCarbonEmissionsBy2028Member2021-01-012021-12-310000936340dte:ReductionOfCarbonEmissionsBy2040Member2021-01-012021-12-310000936340dte:ReductionOfCarbonEmissionsBy2050Memberdte:DTEElectricMember2021-01-012021-12-31dte:sitedte:facility0000936340dte:CoalCombustionResidualAndEffluentLimitationsGuidelinesRulesMemberdte:DTEElectricMember2021-12-310000936340dte:ReductionOfGreenhouseGasEmissionsBy2050Memberdte:DTEGasMember2020-06-012020-06-300000936340dte:ReductionOfEmissionsFromNaturalGasBy2050Memberdte:DTEGasMember2020-06-012020-06-300000936340dte:CleanUpCompletedandSiteClosedMemberdte:DTEGasMember2021-01-012021-12-310000936340dte:PartialClosureCompleteMemberdte:DTEGasMember2021-01-012021-12-310000936340dte:SyntheticFuelMember2021-01-012021-12-310000936340dte:SyntheticFuelMember2021-12-310000936340dte:ReducedEmissionsFuelGuaranteesMember2021-01-012021-12-310000936340dte:ReducedEmissionsFuelGuaranteesMember2021-12-310000936340us-gaap:GuaranteeTypeOtherMember2021-12-310000936340us-gaap:SuretyBondMember2021-12-310000936340dte:DTEElectricMemberus-gaap:SuretyBondMember2021-12-310000936340us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsMemberus-gaap:LaborForceConcentrationRiskMember2021-12-31dte:employee0000936340us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsMemberus-gaap:LaborForceConcentrationRiskMemberdte:DTEElectricMember2021-12-310000936340us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsMemberus-gaap:LaborForceConcentrationRiskMember2021-01-012021-12-310000936340us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsMemberus-gaap:LaborForceConcentrationRiskMemberdte:DTEElectricMember2021-01-012021-12-310000936340us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMemberus-gaap:LaborForceConcentrationRiskMember2021-01-012021-12-310000936340us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMemberus-gaap:LaborForceConcentrationRiskMemberdte:DTEElectricMember2021-01-012021-12-310000936340dte:PowerPurchaseAgreementsMember2021-12-310000936340dte:OtherPurchaseCommitmentsMember2021-12-310000936340dte:PowerPurchaseAgreementsMemberdte:DTEElectricMember2021-12-310000936340dte:OtherPurchaseCommitmentsMemberdte:DTEElectricMember2021-12-310000936340dte:DTEElectricMember2014-01-012014-05-150000936340dte:DTEElectricMember2014-05-162014-05-16utr:kWh0000936340us-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310000936340us-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310000936340us-gaap:PensionPlansDefinedBenefitMember2019-01-012019-12-310000936340us-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:PensionPlansDefinedBenefitMember2019-12-310000936340dte:DTEElectricMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310000936340us-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310000936340us-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310000936340us-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2019-01-012019-12-310000936340dte:DTEElectricMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310000936340dte:DTEElectricMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2019-01-012019-12-310000936340srt:MaximumMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340srt:MaximumMemberdte:DTEElectricMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMembersrt:ScenarioForecastMember2022-01-012022-12-310000936340srt:MaximumMemberus-gaap:QualifiedPlanMemberus-gaap:PensionPlansDefinedBenefitMembersrt:ScenarioForecastMemberdte:DTEGasMember2022-01-012022-12-310000936340dte:DTEElectricMemberus-gaap:PensionPlansDefinedBenefitMember2021-01-012021-12-310000936340dte:DTEElectricMemberus-gaap:PensionPlansDefinedBenefitMember2020-01-012020-12-310000936340dte:DTEElectricMemberus-gaap:PensionPlansDefinedBenefitMember2019-01-012019-12-310000936340us-gaap:DefinedBenefitPlanEquitySecuritiesUsLargeCapMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340dte:DefinedBenefitPlanEquitySecuritiesUSSmallCapandMidCapMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FixedIncomeSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:ShortTermInvestmentsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:ShortTermInvestmentsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:ShortTermInvestmentsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:ShortTermInvestmentsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:ShortTermInvestmentsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:ShortTermInvestmentsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:ShortTermInvestmentsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:ShortTermInvestmentsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340dte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340dte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340dte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340dte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:FixedIncomeSecuritiesCorporateMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:FixedIncomeSecuritiesCorporateMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberdte:FixedIncomeSecuritiesCorporateMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340dte:FixedIncomeSecuritiesCorporateMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberdte:FixedIncomeSecuritiesCorporateMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberdte:FixedIncomeSecuritiesCorporateMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberdte:FixedIncomeSecuritiesCorporateMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340dte:FixedIncomeSecuritiesCorporateMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PensionPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:PensionPlansDefinedBenefitMember2020-12-310000936340us-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-01-012021-12-310000936340us-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-01-012020-12-310000936340us-gaap:DefinedBenefitPostretirementHealthCoverageMember2019-01-012019-12-310000936340dte:DTEElectricMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2021-01-012021-12-310000936340dte:DTEElectricMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2020-01-012020-12-310000936340dte:DTEElectricMemberus-gaap:DefinedBenefitPostretirementHealthCoverageMember2019-01-012019-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-01-012021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-01-012020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2019-01-012019-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2021-01-012021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2020-01-012020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2019-01-012019-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2019-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2019-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsLargeCapMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DefinedBenefitPlanEquitySecuritiesUSSmallCapandMidCapMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FixedIncomeSecuritiesMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ShortTermInvestmentsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ShortTermInvestmentsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:ShortTermInvestmentsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ShortTermInvestmentsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ShortTermInvestmentsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ShortTermInvestmentsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:ShortTermInvestmentsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:ShortTermInvestmentsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesGovernmentalMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesGovernmentalMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesGovernmentalMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesGovernmentalMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesGovernmentalMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesGovernmentalMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesCorporateMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesCorporateMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberdte:FixedIncomeSecuritiesCorporateMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesCorporateMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesCorporateMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesCorporateMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberdte:FixedIncomeSecuritiesCorporateMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:FixedIncomeSecuritiesCorporateMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:ShortTermInvestmentsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:ShortTermInvestmentsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:ShortTermInvestmentsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:ShortTermInvestmentsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:ShortTermInvestmentsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:ShortTermInvestmentsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:ShortTermInvestmentsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:ShortTermInvestmentsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:DefinedBenefitPlanEquitySecuritiesNonUsMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesGovernmentalMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesGovernmentalMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesGovernmentalMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesGovernmentalMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesGovernmentalMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesGovernmentalMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesGovernmentalMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesCorporateMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesCorporateMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberdte:FixedIncomeSecuritiesCorporateMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesCorporateMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesCorporateMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesCorporateMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMemberdte:FixedIncomeSecuritiesCorporateMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberdte:FixedIncomeSecuritiesCorporateMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2021-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340us-gaap:HedgeFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2021-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340us-gaap:PrivateEquityFundsMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2020-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2021-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2021-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2021-12-310000936340us-gaap:FairValueInputsLevel1Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2020-12-310000936340us-gaap:FairValueInputsLevel2Memberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMember2020-12-310000936340us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMemberdte:DTEElectricMemberus-gaap:FairValueMeasuredAtNetAssetValuePerShareMember2020-12-310000936340us-gaap:EmployeeStockOptionMember2021-01-012021-12-310000936340us-gaap:RestrictedStockMember2021-01-012021-12-310000936340us-gaap:PerformanceSharesMember2021-01-012021-12-310000936340dte:PerformanceUnitMember2021-01-012021-12-310000936340us-gaap:RestrictedStockMember2020-01-012020-12-310000936340us-gaap:RestrictedStockMember2019-01-012019-12-310000936340us-gaap:PerformanceSharesMember2020-01-012020-12-310000936340us-gaap:PerformanceSharesMember2019-01-012019-12-310000936340us-gaap:PerformanceSharesMember2020-12-310000936340us-gaap:PerformanceSharesMember2021-12-310000936340us-gaap:RestrictedStockMember2021-12-310000936340dte:DTEElectricMembersrt:ParentCompanyMember2021-01-012021-12-310000936340dte:DTEElectricMembersrt:ParentCompanyMember2020-01-012020-12-310000936340dte:DTEElectricMembersrt:ParentCompanyMember2019-01-012019-12-310000936340us-gaap:IntersegmentEliminationMemberdte:ElectricMember2021-01-012021-12-310000936340us-gaap:IntersegmentEliminationMemberdte:ElectricMember2020-01-012020-12-310000936340us-gaap:IntersegmentEliminationMemberdte:ElectricMember2019-01-012019-12-310000936340us-gaap:IntersegmentEliminationMemberdte:GasMember2021-01-012021-12-310000936340us-gaap:IntersegmentEliminationMemberdte:GasMember2020-01-012020-12-310000936340us-gaap:IntersegmentEliminationMemberdte:GasMember2019-01-012019-12-310000936340dte:DTEVantageMemberus-gaap:IntersegmentEliminationMember2021-01-012021-12-310000936340dte:DTEVantageMemberus-gaap:IntersegmentEliminationMember2020-01-012020-12-310000936340dte:DTEVantageMemberus-gaap:IntersegmentEliminationMember2019-01-012019-12-310000936340dte:EnergyTradingMemberus-gaap:IntersegmentEliminationMember2021-01-012021-12-310000936340dte:EnergyTradingMemberus-gaap:IntersegmentEliminationMember2020-01-012020-12-310000936340dte:EnergyTradingMemberus-gaap:IntersegmentEliminationMember2019-01-012019-12-310000936340us-gaap:CorporateAndOtherMemberus-gaap:IntersegmentEliminationMember2021-01-012021-12-310000936340us-gaap:CorporateAndOtherMemberus-gaap:IntersegmentEliminationMember2020-01-012020-12-310000936340us-gaap:CorporateAndOtherMemberus-gaap:IntersegmentEliminationMember2019-01-012019-12-310000936340us-gaap:IntersegmentEliminationMember2021-01-012021-12-310000936340us-gaap:IntersegmentEliminationMember2020-01-012020-12-310000936340us-gaap:IntersegmentEliminationMember2019-01-012019-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:ElectricMember2021-01-012021-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:GasMember2021-01-012021-12-310000936340dte:DTEVantageMemberus-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMember2021-01-012021-12-310000936340us-gaap:SegmentContinuingOperationsMemberdte:EnergyTradingMemberus-gaap:OperatingSegmentsMember2021-01-012021-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberus-gaap:CorporateAndOtherMember2021-01-012021-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:IntersegmentEliminationMember2021-01-012021-12-310000936340us-gaap:SegmentContinuingOperationsMember2021-01-012021-12-310000936340us-gaap:SegmentDiscontinuedOperationsMember2021-01-012021-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:ElectricMember2021-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:GasMember2021-12-310000936340dte:DTEVantageMemberus-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMember2021-12-310000936340us-gaap:SegmentContinuingOperationsMemberdte:EnergyTradingMemberus-gaap:OperatingSegmentsMember2021-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberus-gaap:CorporateAndOtherMember2021-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:IntersegmentEliminationMember2021-12-310000936340us-gaap:OperatingSegmentsMemberus-gaap:CorporateAndOtherMember2021-01-012021-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:ElectricMember2020-01-012020-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:GasMember2020-01-012020-12-310000936340dte:DTEVantageMemberus-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMember2020-01-012020-12-310000936340us-gaap:SegmentContinuingOperationsMemberdte:EnergyTradingMemberus-gaap:OperatingSegmentsMember2020-01-012020-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberus-gaap:CorporateAndOtherMember2020-01-012020-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:IntersegmentEliminationMember2020-01-012020-12-310000936340us-gaap:SegmentContinuingOperationsMember2020-01-012020-12-310000936340us-gaap:SegmentDiscontinuedOperationsMember2020-01-012020-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:ElectricMember2020-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:GasMember2020-12-310000936340dte:DTEVantageMemberus-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMember2020-12-310000936340us-gaap:SegmentContinuingOperationsMemberdte:EnergyTradingMemberus-gaap:OperatingSegmentsMember2020-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberus-gaap:CorporateAndOtherMember2020-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:IntersegmentEliminationMember2020-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:ElectricMember2019-01-012019-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:GasMember2019-01-012019-12-310000936340dte:DTEVantageMemberus-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMember2019-01-012019-12-310000936340us-gaap:SegmentContinuingOperationsMemberdte:EnergyTradingMemberus-gaap:OperatingSegmentsMember2019-01-012019-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberus-gaap:CorporateAndOtherMember2019-01-012019-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:IntersegmentEliminationMember2019-01-012019-12-310000936340us-gaap:SegmentContinuingOperationsMember2019-01-012019-12-310000936340us-gaap:SegmentDiscontinuedOperationsMember2019-01-012019-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:ElectricMember2019-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberdte:GasMember2019-12-310000936340dte:DTEVantageMemberus-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMember2019-12-310000936340us-gaap:SegmentContinuingOperationsMemberdte:EnergyTradingMemberus-gaap:OperatingSegmentsMember2019-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:OperatingSegmentsMemberus-gaap:CorporateAndOtherMember2019-12-310000936340us-gaap:SegmentContinuingOperationsMemberus-gaap:IntersegmentEliminationMember2019-12-310000936340us-gaap:SegmentContinuingOperationsMember2019-12-310000936340us-gaap:SegmentDiscontinuedOperationsMember2019-12-310000936340us-gaap:SegmentContinuingOperationsMemberdte:GasStorageAndPipelinesMemberus-gaap:IntersegmentEliminationMember2021-01-012021-12-310000936340us-gaap:SegmentContinuingOperationsMemberdte:GasStorageAndPipelinesMemberus-gaap:IntersegmentEliminationMember2020-01-012020-12-310000936340us-gaap:SegmentContinuingOperationsMemberdte:GasStorageAndPipelinesMemberus-gaap:IntersegmentEliminationMember2019-01-012019-12-310000936340dte:EnergySalesMemberdte:DTEElectricMember2021-01-012021-12-310000936340dte:EnergySalesMemberdte:DTEElectricMember2020-01-012020-12-310000936340dte:EnergySalesMemberdte:DTEElectricMember2019-01-012019-12-310000936340dte:OtherServicesandInterestMemberdte:DTEElectricMember2021-01-012021-12-310000936340dte:OtherServicesandInterestMemberdte:DTEElectricMember2020-01-012020-12-310000936340dte:OtherServicesandInterestMemberdte:DTEElectricMember2019-01-012019-12-310000936340dte:DTEElectricMemberdte:SharedCapitalAssetsMember2021-01-012021-12-310000936340dte:DTEElectricMemberdte:SharedCapitalAssetsMember2020-01-012020-12-310000936340dte:DTEElectricMemberdte:SharedCapitalAssetsMember2019-01-012019-12-310000936340dte:DTEElectricMemberdte:FuelandPowerPurchasesMember2021-01-012021-12-310000936340dte:DTEElectricMemberdte:FuelandPowerPurchasesMember2020-01-012020-12-310000936340dte:DTEElectricMemberdte:FuelandPowerPurchasesMember2019-01-012019-12-310000936340dte:CorporateExpensesMemberdte:DTEElectricMember2021-01-012021-12-310000936340dte:CorporateExpensesMemberdte:DTEElectricMember2020-01-012020-12-310000936340dte:CorporateExpensesMemberdte:DTEElectricMember2019-01-012019-12-310000936340us-gaap:ParentMemberdte:DTEElectricMember2021-01-012021-12-310000936340us-gaap:ParentMemberdte:DTEElectricMember2020-01-012020-12-310000936340us-gaap:ParentMemberdte:DTEElectricMember2019-01-012019-12-310000936340dte:DTEElectricMemberdte:DTEEnergyFoundationMember2021-01-012021-12-310000936340dte:DTEElectricMemberdte:DTEEnergyFoundationMember2020-01-012020-12-310000936340dte:DTEElectricMemberdte:DTEEnergyFoundationMember2019-01-012019-12-3100009363402021-04-012021-06-3000009363402021-10-012021-12-3100009363402020-01-012020-03-3100009363402020-04-012020-06-3000009363402020-07-012020-09-3000009363402020-10-012020-12-310000936340us-gaap:AllowanceForCreditLossMember2020-12-310000936340us-gaap:AllowanceForCreditLossMember2019-12-310000936340us-gaap:AllowanceForCreditLossMember2018-12-310000936340us-gaap:AllowanceForCreditLossMember2021-01-012021-12-310000936340us-gaap:AllowanceForCreditLossMember2020-01-012020-12-310000936340us-gaap:AllowanceForCreditLossMember2019-01-012019-12-310000936340us-gaap:AllowanceForCreditLossMember2021-12-310000936340dte:DTEElectricMemberus-gaap:AllowanceForCreditLossMember2020-12-310000936340dte:DTEElectricMemberus-gaap:AllowanceForCreditLossMember2019-12-310000936340dte:DTEElectricMemberus-gaap:AllowanceForCreditLossMember2018-12-310000936340dte:DTEElectricMemberus-gaap:AllowanceForCreditLossMember2021-01-012021-12-310000936340dte:DTEElectricMemberus-gaap:AllowanceForCreditLossMember2020-01-012020-12-310000936340dte:DTEElectricMemberus-gaap:AllowanceForCreditLossMember2019-01-012019-12-310000936340dte:DTEElectricMemberus-gaap:AllowanceForCreditLossMember2021-12-31

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

______________________________________________

FORM 10-K

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

For the Fiscal Year Ended December 31, 2021

Or

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

Registrants address of principal executive offices: One Energy Plaza, Detroit, Michigan 48226-1279

Registrants telephone number, including area code: (313) 235-4000

Securities registered pursuant to Section 12(g) of the Act:

DTE Energy

None

DTE Electric

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

DTE Energy

Yes

☒

No

☐

DTE Electric

Yes

☒

No

☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

DTE Energy

Yes

☐

No

☒

DTE Electric

Yes

☐

No

☒

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.

DTE Energy

Yes

☒

No

☐

DTE Electric

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 during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

DTE Energy

Yes

☒

No

☐

DTE Electric

Yes

☒

No

☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, 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. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.

DTE Energy

Yes

☒

No

☐

DTE Electric

Yes

☐

No

☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

DTE Energy

Yes

☐

No

☒

DTE Electric

Yes

☐

No

☒

On June 30, 2021, the aggregate market value of DTE Energy's voting and non voting common equity held by non-affiliates was approximately $21.2 billion (based on the New York Stock Exchange closing price on such date).

Number of shares of Common Stock outstanding at January 31, 2022:

DOCUMENTS INCORPORATED BY REFERENCE

Certain information in DTE Energy's definitive Proxy Statement for its 2022 Annual Meeting of Common Shareholders to be held May 5, 2022, which will be filed with the Securities and Exchange Commission pursuant to Regulation 14A, not later than 120 days after the end of the Registrants' fiscal year covered by this report on Form 10-K, is incorporated herein by reference to Part III (Items 10, 11, 12, 13, and 14) of this Form 10-K.

This combined Form 10-K is filed separately by two registrants: DTE Energy and DTE Electric. Information contained herein relating to any individual registrant is filed by such registrant solely on its own behalf. DTE Electric makes no representation as to information relating exclusively to DTE Energy.

DTE Electric, an indirect wholly-owned subsidiary of DTE Energy, meets the conditions set forth in General Instructions I(1)(a) and (b) of Form 10-K and is therefore filing this form with the reduced disclosure format specified in General Instruction I(2) of Form 10-K.

						Page
			Definitions			1
			Filing Format			4
			Forward-Looking Statements			4
PART I
Items 1. & 2.			Business and Properties			6
Item 1A.			Risk Factors			18
Item 1B.			Unresolved Staff Comments			24
Item 3.			Legal Proceedings			24
Item 4.			Mine Safety Disclosures			24
PART II
Item 5.			Market for Registrant’s Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities			25
Item 6.			Selected Financial Data			26
Item 7.			Management’s Discussion and Analysis of Financial Condition and Results of Operations			27
Item 7A.			Quantitative and Qualitative Disclosures About Market Risk			48
Item 8.			Financial Statements and Supplementary Data			51
Item 9.			Changes in and Disagreements with Accountants on Accounting and Financial Disclosure			150
Item 9A.			Controls and Procedures			150
Item 9B.			Other Information			150
Item 9C.			Disclosure Regarding Foreign Jurisdictions that Prevent Inspections			150
PART III
Item 10.			Directors, Executive Officers, and Corporate Governance			151
Item 11.			Executive Compensation			151
Item 12.			Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters			151
Item 13.			Certain Relationships and Related Transactions, and Director Independence			151
Item 14.			Principal Accountant Fees and Services			151
PART IV
Item 15.			Exhibits and Financial Statement Schedules			152
Item 16.			Form 10-K Summary			161
			Signatures			163

FILING FORMAT

This combined Form 10-K is separately filed by DTE Energy and DTE Electric. Information in this combined Form 10-K relating to each individual Registrant is filed by such Registrant on its own behalf. DTE Electric makes no representation regarding information relating to any other companies affiliated with DTE Energy other than its own subsidiaries. Neither DTE Energy, nor any of DTE Energy’s other subsidiaries (other than DTE Electric), has any obligation in respect of DTE Electric's debt securities, and holders of such debt securities should not consider the financial resources or results of operations of DTE Energy nor any of DTE Energy’s other subsidiaries (other than DTE Electric and its own subsidiaries (in relevant circumstances)) in making a decision with respect to DTE Electric's debt securities. Similarly, none of DTE Electric nor any other subsidiary of DTE Energy has any obligation with respect to debt securities of DTE Energy. This combined Form 10-K should be read in its entirety. No one section of this combined Form 10-K deals with all aspects of the subject matter of this combined Form 10-K.

FORWARD-LOOKING STATEMENTS

Certain information presented herein includes "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 with respect to the financial condition, results of operations, and businesses of the Registrants. Words such as "anticipate," "believe," "expect," "may," "could," "projected," "aspiration," "plans," and "goals" signify forward-looking statements. Forward-looking statements are not guarantees of future results and conditions, but rather are subject to numerous assumptions, risks, and uncertainties that may cause actual future results to be materially different from those contemplated, projected, estimated, or budgeted. Many factors may impact forward-looking statements of the Registrants including, but not limited to, the following:

•Risks related to the separation of DT Midstream, including that providing DT Midstream with transition services could adversely affect our business and that the transaction may not achieve some or all of the anticipated benefits;

•the duration and impact of the COVID-19 pandemic on the Registrants and customers;

•impact of regulation by the EPA, EGLE, the FERC, the MPSC, the NRC, and for DTE Energy, the CFTC and CARB, as well as other applicable governmental proceedings and regulations, including any associated impact on rate structures;

•the amount and timing of cost recovery allowed as a result of regulatory proceedings, related appeals, or new legislation, including legislative amendments and retail access programs;

•economic conditions and population changes in the Registrants' geographic area resulting in changes in demand, customer conservation, and thefts of electricity and, for DTE Energy, natural gas;

•the operational failure of electric or gas distribution systems or infrastructure;

•impact of volatility in prices in the international steel markets and in prices of environmental attributes generated from renewable natural gas investments on the operations of DTE Vantage (formerly Power and Industrial Projects);

•the risk of a major safety incident;

•environmental issues, laws, regulations, and the increasing costs of remediation and compliance, including actual and potential new federal and state requirements;

•the cost of protecting assets and customer data against, or damage due to, cyber incidents and terrorism;

•health, safety, financial, environmental, and regulatory risks associated with ownership and operation of nuclear facilities;

•volatility in commodity markets, deviations in weather, and related risks impacting the results of DTE Energy's energy trading operations;

•changes in the cost and availability of coal and other raw materials, purchased power, and natural gas;

•advances in technology that produce power, store power, or reduce power consumption;

•changes in the financial condition of significant customers and strategic partners;

•the potential for losses on investments, including nuclear decommissioning and benefit plan assets and the related increases in future expense and contributions;

•access to capital markets and the results of other financing efforts which can be affected by credit agency ratings;

•instability in capital markets which could impact availability of short and long-term financing;

•impacts of inflation and the timing and extent of changes in interest rates;

•the level of borrowings;

•the potential for increased costs or delays in completion of significant capital projects;

•changes in, and application of, federal, state, and local tax laws and their interpretations, including the Internal Revenue Code, regulations, rulings, court proceedings, and audits;

•the effects of weather and other natural phenomena, including climate change, on operations and sales to customers, and purchases from suppliers;

•unplanned outages;

•employee relations and the impact of collective bargaining agreements;

•the availability, cost, coverage, and terms of insurance and stability of insurance providers;

•cost reduction efforts and the maximization of plant and distribution system performance;

•the effects of competition;

•changes in and application of accounting standards and financial reporting regulations;

•changes in federal or state laws and their interpretation with respect to regulation, energy policy, and other business issues;

•successful execution of new business development and future growth plans;

•contract disputes, binding arbitration, litigation, and related appeals;

•the ability of the electric and gas utilities to achieve net zero emissions goals; and

•the risks discussed in the Registrants' public filings with the Securities and Exchange Commission.

New factors emerge from time to time. The Registrants cannot predict what factors may arise or how such factors may cause results to differ materially from those contained in any forward-looking statement. Any forward-looking statements speak only as of the date on which such statements are made. The Registrants undertake no obligation to update any forward-looking statement to reflect events or circumstances after the date on which such statement is made or to reflect the occurrence of unanticipated events.