false--12-31FY20190001666175P35Y02000000500000040000000111111P5YP2YP2YP3YP3YP3YP5Y20600000015100000045.1445.1453.9753.97P5DP5DP5DP5D1.751.8554285000004633000004285000004633000000.0880.06500.02850.060.08800.06500.02850.0620312660000000000003700000000000020300000000000024100000000000043000000000000168000000000000P5YP1YP90YP10YP100YP36YP3YP10YP90YP10YP100YP43YP3YP10Y7700000077000000770000007700000000.8000.0100.05660.06140.04510.04190.04640.05030.05050.04450.04380.03910.03410.04430.04760.04660.05660.06140.04460.04260.04640.04870.05050.04450.04380.03790.03800.02350.04270.04530.0464P40YP20Y110000001300000066200000297500080000001000000024000000500000092000007025000662000002975000800000010000000240000005000000920000070250001623000000730000001960000002440000005910000001220000002250000001720000001623000000730000001960000002440000005910000001220000002250000001720000000.400.600.09300.08780.12240.0988P80YP95YP5YP14YP80YP95YP5YP15YP85YP1YP85YP1YP70YP3YP70YP3YP90YP85YP20YP5YP90YP85YP20YP5YP10YP4YP3Y0No par value. Unlimited authorized shares; 463.3 million and 428.5 million issued and outstanding as at December 31, 2019 and 2018, respectively 0001666175 2019-01-01 2019-12-31 0001666175 dei:BusinessContactMember 2019-01-01 2019-12-31 0001666175 2019-12-31 0001666175 2018-12-31 0001666175 2018-01-01 2018-12-31 0001666175 2017-12-31 0001666175 us-gaap:RetainedEarningsMember 2019-12-31 0001666175 us-gaap:RetainedEarningsMember 2018-12-31 0001666175 us-gaap:NoncontrollingInterestMember 2018-01-01 2018-12-31 0001666175 us-gaap:CommonStockMember 2018-01-01 2018-12-31 0001666175 us-gaap:CommonStockMember 2018-12-31 0001666175 us-gaap:RetainedEarningsMember 2018-01-01 2018-12-31 0001666175 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-01-01 2019-12-31 0001666175 us-gaap:RetainedEarningsMember 2019-01-01 2019-12-31 0001666175 us-gaap:CommonStockMember 2019-01-01 2019-12-31 0001666175 us-gaap:AdditionalPaidInCapitalMember 2018-01-01 2018-12-31 0001666175 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-12-31 0001666175 us-gaap:CommonStockMember 2019-12-31 0001666175 us-gaap:AdditionalPaidInCapitalMember 2017-12-31 0001666175 us-gaap:NoncontrollingInterestMember 2019-12-31 0001666175 us-gaap:NoncontrollingInterestMember 2017-12-31 0001666175 us-gaap:RetainedEarningsMember 2017-12-31 0001666175 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-12-31 0001666175 us-gaap:PreferredStockMember 2018-12-31 0001666175 us-gaap:NoncontrollingInterestMember 2019-01-01 2019-12-31 0001666175 us-gaap:AdditionalPaidInCapitalMember 2019-01-01 2019-12-31 0001666175 us-gaap:CommonStockMember 2017-12-31 0001666175 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-12-31 0001666175 us-gaap:PreferredStockMember 2019-12-31 0001666175 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-01-01 2018-12-31 0001666175 us-gaap:AdditionalPaidInCapitalMember 2018-12-31 0001666175 us-gaap:NoncontrollingInterestMember 2018-12-31 0001666175 us-gaap:AdditionalPaidInCapitalMember 2019-12-31 0001666175 us-gaap:PreferredStockMember 2017-12-31 0001666175 fts:FortisTurksandCaicosMember fts:DieselMember 2019-12-31 0001666175 fts:TucsonElectricPowerCompanyandUNSElectricInc.Member fts:ElectricityGenerationPlantSolarMember 2019-12-31 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member 2019-12-31 0001666175 fts:FortisBCEnergyInc.Member 2019-12-31 0001666175 fts:MaritimeElectricCompanyLimitedMember 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member 2019-12-31 0001666175 fts:NewfoundlandPowerInc.Member 2019-12-31 0001666175 fts:BelizeElectricCompanyLimitedMember fts:HydroelectricPowerGenerationMember 2019-12-31 0001666175 fts:FortisOntarioInc.Member 2019-12-31 0001666175 fts:FortisInc.Member fts:WataynikaneyapPowerLimitedPartnershipMember 2019-12-31 0001666175 fts:TucsonElectricPowerCompanyandUNSElectricInc.Member 2019-12-31 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member fts:DieselMember 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember fts:GasFiredandHydroelectricPowerGenerationMember 2019-12-31 0001666175 fts:FortisBCInc.Member fts:HydroelectricPowerGenerationMember 2019-12-31 0001666175 fts:WataynikaneyapPowerLimitedPartnershipMember 2018-12-31 0001666175 fts:AitkenCreekMember 2019-12-31 0001666175 fts:BelizeElectricityLimitedMember 2019-12-31 0001666175 fts:FortisOntarioInc.Member fts:ElectricUtilitiesMember 2019-12-31 0001666175 fts:BelizeElectricCompanyLimitedMember fts:HydroelectricPowerGenerationMember 2019-01-01 2019-12-31 0001666175 fts:WataynikaneyapPowerLimitedPartnershipMember 2019-12-31 0001666175 fts:FortisTurksandCaicosMember 2019-12-31 0001666175 fts:NewfoundlandPowerInc.Member fts:HydroelectricPowerGenerationMember 2019-12-31 0001666175 fts:WataynikaneyapPowerLimitedPartnershipMember 2019-01-31 0001666175 fts:ITCHoldingsCorp.Member srt:MaximumMember fts:U.S.FederalEnergyRegulatoryCommissionMember 2018-04-19 2018-04-19 0001666175 fts:CentralHudsonGasandElectricCorporationMember fts:YearTwoMember 2018-07-01 2018-07-01 0001666175 fts:ITCHoldingsCorp.Member fts:U.S.FederalEnergyRegulatoryCommissionMember 2018-04-19 2018-04-19 0001666175 fts:FortisOntarioInc.Member fts:ElectricUtilitiesMember fts:OntarioEnergyBoardMember 2019-12-31 0001666175 fts:FortisAlbertaInc.Member fts:AlbertaUtilitiesCommissionMember 2017-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:U.S.FederalEnergyRegulatoryCommissionMember 2016-06-01 2016-06-30 0001666175 fts:ITCHoldingsCorp.Member fts:EstimatedReturnonEquityRefundInitialRefundPeriodMember 2017-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:U.S.FederalEnergyRegulatoryCommissionMember 2019-01-01 2019-12-31 0001666175 fts:FortisInc.Member fts:November2019OrderMember 2019-01-01 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember 2018-07-01 2018-07-01 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member fts:CaymanIslandsUtilityRegulationandCompetitionOfficeMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member srt:MinimumMember fts:U.S.FederalEnergyRegulatoryCommissionMember 2018-04-19 2018-04-19 0001666175 fts:FortisTurksandCaicosMember fts:GovernmentoftheTurksandCaicosIslandsMember 2019-01-01 2019-12-31 0001666175 fts:UNSGasInc.Member fts:ArizonaCorporationCommissionMember 2012-05-01 2012-05-01 0001666175 fts:TucsonElectricPowerCompanyMember fts:ArizonaCorporationCommissionMember 2019-01-01 2019-12-31 0001666175 fts:FortisOntarioInc.Member srt:MinimumMember fts:OntarioEnergyBoardMember 2019-01-01 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember fts:YearOneMember 2018-07-01 2018-07-01 0001666175 fts:FortisBCEnergyInc.Member fts:BritishColumbiaUtilitiesCommissionMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:U.S.FederalEnergyRegulatoryCommissionMember 2016-09-01 2016-09-30 0001666175 fts:FortisBCEnergyInc.andFortisBCInc.Member fts:BritishColumbiaUtilitiesCommissionMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member srt:MaximumMember fts:November2019OrderMember fts:U.S.FederalEnergyRegulatoryCommissionMember 2019-11-01 2019-11-30 0001666175 fts:FortisInc.Member fts:November2019OrderPriorYearImpactMember 2019-01-01 2019-12-31 0001666175 fts:FortisOntarioInc.Member srt:MaximumMember fts:OntarioEnergyBoardMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member srt:MaximumMember fts:U.S.FederalEnergyRegulatoryCommissionMember 2016-06-01 2016-06-30 0001666175 fts:CentralHudsonGasandElectricCorporationMember srt:MaximumMember 2019-01-01 2019-12-31 0001666175 fts:NewfoundlandPowerInc.Member fts:NewfoundlandandLabradorBoardofCommissionersofPublicUtilitiesMember 2019-01-01 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember 2015-07-01 2015-07-01 0001666175 fts:ITCHoldingsCorp.Member fts:November2019OrderMember fts:EstimatedReturnonEquityRefundMember 2019-12-31 0001666175 fts:FortisBCEnergyInc.Member fts:BritishColumbiaUtilitiesCommissionMember 2016-01-01 2016-01-01 0001666175 fts:TucsonElectricPowerCompanyMember fts:GeneralRateApplicationMember fts:ArizonaCorporationCommissionMember 2019-01-01 2019-12-31 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member srt:MaximumMember fts:CaymanIslandsUtilityRegulationandCompetitionOfficeMember 2018-01-01 2018-12-31 0001666175 fts:TucsonElectricPowerCompanyMember fts:GeneralRateApplicationMember fts:ArizonaCorporationCommissionMember 2019-04-01 2019-04-30 0001666175 fts:ITCHoldingsCorp.Member fts:SecondComplaintMember fts:U.S.FederalEnergyRegulatoryCommissionMember 2019-11-01 2019-11-30 0001666175 fts:TucsonElectricPowerCompanyMember fts:GeneralRateApplicationMember fts:ArizonaCorporationCommissionMember 2019-11-01 2019-11-30 0001666175 fts:ITCHoldingsCorp.Member fts:U.S.FederalEnergyRegulatoryCommissionMember 2018-11-01 2018-11-30 0001666175 fts:FortisInc.Member fts:November2019OrderCurrentYearImpactMember 2019-01-01 2019-12-31 0001666175 fts:FortisBCInc.Member fts:BritishColumbiaUtilitiesCommissionMember 2016-01-01 2016-01-01 0001666175 fts:ITCHoldingsCorp.Member fts:EstimatedReturnonEquityRefundInitialandSecondRefundPeriodMember 2013-11-01 2016-05-31 0001666175 fts:ITCHoldingsCorp.Member fts:November2019OrderMember fts:EstimatedReturnonEquityRefundMember 2018-12-31 0001666175 fts:FortisAlbertaInc.Member fts:AlbertaUtilitiesCommissionMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:November2019OrderMember fts:U.S.FederalEnergyRegulatoryCommissionMember 2019-11-01 2019-11-30 0001666175 fts:ITCHoldingsCorp.Member fts:EstimatedReturnonEquityRefundSecondRefundPeriodMember 2018-12-31 0001666175 fts:FortisOntarioInc.Member 2019-01-01 2019-12-31 0001666175 fts:TucsonElectricPowerCompanyMember fts:GeneralRateApplicationMember fts:ArizonaCorporationCommissionMember 2019-11-30 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member srt:MaximumMember fts:CaymanIslandsUtilityRegulationandCompetitionOfficeMember 2019-01-01 2019-12-31 0001666175 fts:FortisOntarioInc.Member fts:ElectricUtilitiesUsingFutureTestYeartoEstablishRatesMember 2019-12-31 0001666175 fts:MaritimeElectricCompanyLimitedMember fts:IslandRegulatoryandAppealsCommissionMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:U.S.FederalEnergyRegulatoryCommissionMember 2018-04-20 2018-04-20 0001666175 fts:CentralHudsonGasandElectricCorporationMember fts:YearThreeMember 2018-07-01 2018-07-01 0001666175 fts:FortisBCInc.Member fts:BritishColumbiaUtilitiesCommissionMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:U.S.FederalEnergyRegulatoryCommissionMember fts:EstimatedReturnonEquityRefundInitialandSecondRefundPeriodMember 2013-11-01 2016-05-31 0001666175 fts:ITCHoldingsCorp.Member srt:MaximumMember fts:U.S.FederalEnergyRegulatoryCommissionMember 2016-09-01 2016-09-30 0001666175 fts:FortisTurksandCaicosMember srt:MinimumMember fts:GovernmentoftheTurksandCaicosIslandsMember 2019-01-01 2019-12-31 0001666175 fts:UNSElectricInc.Member fts:ArizonaCorporationCommissionMember 2016-08-01 2016-08-01 0001666175 fts:FortisOntarioInc.Member fts:OntarioEnergyBoardMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member srt:MaximumMember fts:U.S.FederalEnergyRegulatoryCommissionMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:U.S.FederalEnergyRegulatoryCommissionMember 2016-08-31 2016-08-31 0001666175 fts:ITCHoldingsCorp.Member fts:November2019OrderMember 2019-01-01 2019-12-31 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member srt:MinimumMember fts:CaymanIslandsUtilityRegulationandCompetitionOfficeMember 2018-01-01 2018-12-31 0001666175 fts:ITCHoldingsCorp.Member srt:MinimumMember fts:U.S.FederalEnergyRegulatoryCommissionMember 2019-01-01 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember srt:MinimumMember 2019-01-01 2019-12-31 0001666175 fts:FortisTurksandCaicosMember srt:MaximumMember fts:GovernmentoftheTurksandCaicosIslandsMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:U.S.FederalEnergyRegulatoryCommissionMember 2016-05-01 2016-09-30 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member srt:MinimumMember fts:CaymanIslandsUtilityRegulationandCompetitionOfficeMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member srt:MinimumMember fts:U.S.FederalEnergyRegulatoryCommissionMember 2018-01-01 2018-12-31 0001666175 fts:ITCHoldingsCorp.Member srt:MaximumMember fts:U.S.FederalEnergyRegulatoryCommissionMember 2018-01-01 2018-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:U.S.FederalEnergyRegulatoryCommissionMember 2018-01-01 2018-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:November2019OrderMember fts:EstimatedReturnonEquityRefundMember 2019-01-01 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember 2017-01-01 2017-12-31 0001666175 fts:FortisOntarioInc.Member fts:ElectricUtilitiesMember 2019-01-01 2019-12-31 0001666175 fts:MaritimeElectricCompanyLimitedMember fts:IslandRegulatoryandAppealsCommissionMember 2019-03-01 2019-03-01 0001666175 fts:FortisOntarioInc.Member srt:MinimumMember fts:OntarioEnergyBoardMember 2018-01-01 2018-12-31 0001666175 fts:FortisOntarioInc.Member fts:OntarioEnergyBoardMember 2018-01-01 2018-12-31 0001666175 fts:FortisOntarioInc.Member srt:MaximumMember fts:OntarioEnergyBoardMember 2018-01-01 2018-12-31 0001666175 us-gaap:ComputerSoftwareIntangibleAssetMember 2019-01-01 2019-12-31 0001666175 us-gaap:OtherIntangibleAssetsMember 2019-01-01 2019-12-31 0001666175 fts:LandTransmissionandWaterRightsMember 2018-01-01 2018-12-31 0001666175 us-gaap:OtherIntangibleAssetsMember 2018-01-01 2018-12-31 0001666175 us-gaap:ComputerSoftwareIntangibleAssetMember 2018-01-01 2018-12-31 0001666175 fts:LandTransmissionandWaterRightsMember 2019-01-01 2019-12-31 0001666175 srt:MaximumMember 2019-01-01 2019-12-31 0001666175 srt:WeightedAverageMember 2019-12-31 0001666175 srt:MinimumMember 2019-01-01 2019-12-31 0001666175 srt:DirectorMember fts:DirectorsDeferredShareUnitMember 2018-12-31 0001666175 us-gaap:PerformanceSharesMember 2019-01-01 2019-12-31 0001666175 srt:DirectorMember fts:DirectorsDeferredShareUnitMember 2019-12-31 0001666175 srt:MaximumMember 2018-01-01 2018-12-31 0001666175 srt:WeightedAverageMember 2018-12-31 0001666175 srt:MinimumMember 2018-01-01 2018-12-31 0001666175 us-gaap:ElectricDistributionMember 2018-01-01 2018-12-31 0001666175 us-gaap:GasTransmissionMember 2019-01-01 2019-12-31 0001666175 us-gaap:ElectricTransmissionMember 2018-01-01 2018-12-31 0001666175 us-gaap:ElectricTransmissionMember 2019-01-01 2019-12-31 0001666175 us-gaap:GasDistributionMember 2019-01-01 2019-12-31 0001666175 us-gaap:GasDistributionMember 2018-01-01 2018-12-31 0001666175 us-gaap:GasTransmissionMember 2018-01-01 2018-12-31 0001666175 us-gaap:ElectricDistributionMember 2019-01-01 2019-12-31 0001666175 srt:MaximumMember us-gaap:ElectricDistributionMember 2019-01-01 2019-12-31 0001666175 srt:MinimumMember us-gaap:ElectricTransmissionMember 2019-01-01 2019-12-31 0001666175 srt:MinimumMember us-gaap:ElectricDistributionMember 2019-01-01 2019-12-31 0001666175 srt:MinimumMember us-gaap:GasDistributionMember 2018-01-01 2018-12-31 0001666175 srt:MaximumMember us-gaap:ElectricTransmissionMember 2018-01-01 2018-12-31 0001666175 srt:MinimumMember us-gaap:ElectricDistributionMember 2018-01-01 2018-12-31 0001666175 srt:MaximumMember us-gaap:GasTransmissionMember 2019-01-01 2019-12-31 0001666175 srt:MinimumMember us-gaap:GasDistributionMember 2019-01-01 2019-12-31 0001666175 srt:MinimumMember us-gaap:ElectricTransmissionMember 2018-01-01 2018-12-31 0001666175 srt:MaximumMember us-gaap:GasDistributionMember 2018-01-01 2018-12-31 0001666175 srt:MaximumMember us-gaap:GasTransmissionMember 2018-01-01 2018-12-31 0001666175 srt:MaximumMember us-gaap:ElectricTransmissionMember 2019-01-01 2019-12-31 0001666175 srt:MaximumMember us-gaap:GasDistributionMember 2019-01-01 2019-12-31 0001666175 srt:MinimumMember us-gaap:GasTransmissionMember 2018-01-01 2018-12-31 0001666175 srt:MinimumMember us-gaap:GasTransmissionMember 2019-01-01 2019-12-31 0001666175 srt:MaximumMember us-gaap:ElectricDistributionMember 2018-01-01 2018-12-31 0001666175 srt:MinimumMember us-gaap:ComputerSoftwareIntangibleAssetMember 2018-01-01 2018-12-31 0001666175 srt:MaximumMember us-gaap:ComputerSoftwareIntangibleAssetMember 2018-01-01 2018-12-31 0001666175 srt:MinimumMember us-gaap:OtherIntangibleAssetsMember 2019-01-01 2019-12-31 0001666175 srt:MinimumMember fts:LandTransmissionandWaterRightsMember 2019-01-01 2019-12-31 0001666175 srt:MaximumMember fts:LandTransmissionandWaterRightsMember 2018-01-01 2018-12-31 0001666175 srt:MaximumMember us-gaap:OtherIntangibleAssetsMember 2019-01-01 2019-12-31 0001666175 srt:MaximumMember us-gaap:ComputerSoftwareIntangibleAssetMember 2019-01-01 2019-12-31 0001666175 srt:MaximumMember fts:LandTransmissionandWaterRightsMember 2019-01-01 2019-12-31 0001666175 srt:MaximumMember us-gaap:OtherIntangibleAssetsMember 2018-01-01 2018-12-31 0001666175 srt:MinimumMember fts:LandTransmissionandWaterRightsMember 2018-01-01 2018-12-31 0001666175 srt:MinimumMember us-gaap:ComputerSoftwareIntangibleAssetMember 2019-01-01 2019-12-31 0001666175 srt:MinimumMember us-gaap:OtherIntangibleAssetsMember 2018-01-01 2018-12-31 0001666175 us-gaap:RestrictedStockUnitsRSUMember 2019-01-01 2019-12-31 0001666175 us-gaap:EmployeeStockOptionMember 2019-01-01 2019-12-31 0001666175 us-gaap:RestrictedStockUnitsRSUMember 2019-12-31 0001666175 fts:DirectorsDeferredShareUnitMember 2019-01-01 2019-12-31 0001666175 us-gaap:PerformanceSharesMember 2019-12-31 0001666175 us-gaap:PerformanceSharesMember 2018-12-31 0001666175 us-gaap:RestrictedStockUnitsRSUMember 2018-12-31 0001666175 fts:WanetaExpansionLimitedPartnershipMember 2018-01-01 2018-12-31 0001666175 fts:AitkenCreekMember 2019-01-01 2019-12-31 0001666175 fts:AitkenCreekMember 2018-01-01 2018-12-31 0001666175 fts:WanetaExpansionLimitedPartnershipMember 2019-01-01 2019-12-31 0001666175 fts:BelizeElectricityLimitedMember us-gaap:EquityMethodInvesteeMember 2019-12-31 0001666175 fts:BelizeElectricityLimitedMember us-gaap:EquityMethodInvesteeMember 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisBCInc.Member 2018-01-01 2018-12-31 0001666175 us-gaap:IntersegmentEliminationMember 2019-01-01 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:UnregulatedOperationMember us-gaap:CorporateAndOtherMember 2019-01-01 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisAlbertaInc.Member 2019-01-01 2019-12-31 0001666175 us-gaap:IntersegmentEliminationMember 2018-01-01 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisBCInc.Member 2019-01-01 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisAlbertaInc.Member 2018-01-01 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:UNSEnergyCorporationMember 2019-01-01 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisBCEnergyInc.Member 2019-01-01 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:UnregulatedOperationMember us-gaap:CorporateAndOtherMember 2018-01-01 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember 2018-01-01 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:OtherElectricMember 2018-01-01 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:CentralHudsonGasandElectricCorporationMember 2019-01-01 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:ITCHoldingsCorp.Member 2018-01-01 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:CentralHudsonGasandElectricCorporationMember 2018-01-01 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:OtherElectricMember 2019-01-01 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:UnregulatedOperationMember fts:EnergyInfrastructureMember 2018-01-01 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember 2019-01-01 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisBCEnergyInc.Member 2018-01-01 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:UnregulatedOperationMember fts:EnergyInfrastructureMember 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:UnregulatedOperationMember fts:EnergyInfrastructureMember 2019-01-01 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisAlbertaInc.Member 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:ITCHoldingsCorp.Member 2019-01-01 2019-12-31 0001666175 us-gaap:IntersegmentEliminationMember 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisBCEnergyInc.Member 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisAlbertaInc.Member 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:UNSEnergyCorporationMember 2018-01-01 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:UNSEnergyCorporationMember 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:CentralHudsonGasandElectricCorporationMember 2019-12-31 0001666175 us-gaap:IntersegmentEliminationMember 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:UNSEnergyCorporationMember 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:UnregulatedOperationMember fts:EnergyInfrastructureMember 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:ITCHoldingsCorp.Member 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:UnregulatedOperationMember us-gaap:CorporateAndOtherMember 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:OtherElectricMember 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisBCInc.Member 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:OtherElectricMember 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisBCEnergyInc.Member 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:CentralHudsonGasandElectricCorporationMember 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:FortisBCInc.Member 2019-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:RegulatedOperationMember fts:ITCHoldingsCorp.Member 2018-12-31 0001666175 us-gaap:OperatingSegmentsMember us-gaap:UnregulatedOperationMember us-gaap:CorporateAndOtherMember 2019-12-31 0001666175 fts:OtherServicesMember us-gaap:RegulatedOperationMember 2018-01-01 2018-12-31 0001666175 fts:FortisBCEnergyInc.andFortisBCInc.Member 2019-01-01 2019-12-31 0001666175 fts:OtherServicesMember us-gaap:RegulatedOperationMember 2019-01-01 2019-12-31 0001666175 fts:November2019OrderMember 2019-01-01 2019-12-31 0001666175 fts:UNSEnergyCorporationMember 2019-01-01 2019-12-31 0001666175 fts:MaritimeElectricCompanyLimitedMember fts:ElectricandGasMember country:CA 2019-01-01 2019-12-31 0001666175 fts:FortisBCEnergyInc.Member fts:ElectricandGasMember country:CA 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:ElectricandGasMember country:US 2018-01-01 2018-12-31 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member fts:ElectricandGasMember fts:CaribbeanMember 2018-01-01 2018-12-31 0001666175 fts:ElectricandGasMember 2018-01-01 2018-12-31 0001666175 fts:FortisBCInc.Member fts:ElectricandGasMember country:CA 2019-01-01 2019-12-31 0001666175 fts:FortisTurksandCaicosMember fts:ElectricandGasMember fts:CaribbeanMember 2019-01-01 2019-12-31 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member fts:ElectricandGasMember fts:CaribbeanMember 2019-01-01 2019-12-31 0001666175 fts:FortisAlbertaInc.Member fts:ElectricandGasMember country:CA 2018-01-01 2018-12-31 0001666175 fts:FortisTurksandCaicosMember fts:ElectricandGasMember fts:CaribbeanMember 2018-01-01 2018-12-31 0001666175 fts:UNSEnergyCorporationMember fts:ElectricandGasMember country:US 2018-01-01 2018-12-31 0001666175 fts:FortisOntarioInc.Member fts:ElectricandGasMember country:CA 2018-01-01 2018-12-31 0001666175 fts:FortisBCInc.Member fts:ElectricandGasMember country:CA 2018-01-01 2018-12-31 0001666175 fts:OtherServicesMember 2018-01-01 2018-12-31 0001666175 fts:OtherServicesMember 2019-01-01 2019-12-31 0001666175 fts:MaritimeElectricCompanyLimitedMember fts:ElectricandGasMember country:CA 2018-01-01 2018-12-31 0001666175 fts:NewfoundlandPowerInc.Member fts:ElectricandGasMember country:CA 2018-01-01 2018-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember fts:ElectricandGasMember country:US 2019-01-01 2019-12-31 0001666175 fts:FortisAlbertaInc.Member fts:ElectricandGasMember country:CA 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:ElectricandGasMember country:US 2019-01-01 2019-12-31 0001666175 fts:UNSEnergyCorporationMember fts:ElectricandGasMember country:US 2019-01-01 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember fts:ElectricandGasMember country:US 2018-01-01 2018-12-31 0001666175 fts:ElectricandGasMember 2019-01-01 2019-12-31 0001666175 fts:FortisOntarioInc.Member fts:ElectricandGasMember country:CA 2019-01-01 2019-12-31 0001666175 fts:FortisBCEnergyInc.Member fts:ElectricandGasMember country:CA 2018-01-01 2018-12-31 0001666175 fts:NewfoundlandPowerInc.Member fts:ElectricandGasMember country:CA 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member 2019-01-01 2019-12-31 0001666175 fts:RawMaterialsandSuppliesMember 2019-12-31 0001666175 fts:PublicUtilitiesInventoryGasandFuelinStorageMember 2019-12-31 0001666175 fts:PublicUtilitiesInventoryGasandFuelinStorageMember 2018-12-31 0001666175 us-gaap:PublicUtilitiesInventoryCoalMember 2018-12-31 0001666175 us-gaap:PublicUtilitiesInventoryCoalMember 2019-12-31 0001666175 fts:RawMaterialsandSuppliesMember 2018-12-31 0001666175 srt:MaximumMember us-gaap:DeferredProjectCostsMember 2019-01-01 2019-12-31 0001666175 fts:UNSEnergyCorporationMember us-gaap:RenewableEnergyProgramMember 2019-12-31 0001666175 srt:MinimumMember us-gaap:DeferredProjectCostsMember 2019-01-01 2019-12-31 0001666175 fts:RegulatoryAssetNotEarningaReturnMember 2019-12-31 0001666175 fts:RegulatoryAssetNotEarningaReturnMember 2018-12-31 0001666175 us-gaap:EnvironmentalRestorationCostsMember 2019-12-31 0001666175 fts:RateStabilizationAccountsMember 2018-12-31 0001666175 fts:EnergyEfficiencyLiabilityMember 2019-12-31 0001666175 fts:RateStabilizationAccountsMember 2019-12-31 0001666175 fts:RateStabilizationAccountsMember 2018-12-31 0001666175 us-gaap:PensionAndOtherPostretirementPlansCostsMember 2018-12-31 0001666175 us-gaap:OtherRegulatoryAssetsLiabilitiesMember 2018-12-31 0001666175 us-gaap:OtherRegulatoryAssetsLiabilitiesMember 2019-12-31 0001666175 us-gaap:OtherRegulatoryAssetsLiabilitiesMember 2019-12-31 0001666175 us-gaap:PensionAndOtherPostretirementPlansCostsMember 2019-12-31 0001666175 us-gaap:RenewableEnergyProgramMember 2018-12-31 0001666175 us-gaap:PensionAndOtherPostretirementPlansCostsMember 2019-12-31 0001666175 fts:EstimatedReturnonEquityRefundMember 2019-12-31 0001666175 us-gaap:DeferredProjectCostsMember 2018-12-31 0001666175 us-gaap:DeferredIncomeTaxChargesMember 2018-12-31 0001666175 fts:UNSEnergyCorporationMember us-gaap:AssetRetirementObligationCostsMember 2019-12-31 0001666175 fts:RateStabilizationAccountsMember 2019-12-31 0001666175 us-gaap:DeferredIncomeTaxChargesMember 2018-12-31 0001666175 fts:DeferredLeaseCostsMember 2018-12-31 0001666175 us-gaap:DeferredIncomeTaxChargesMember 2019-12-31 0001666175 fts:DeferredLeaseCostsMember 2019-12-31 0001666175 us-gaap:DeferredProjectCostsMember 2019-12-31 0001666175 fts:EnergyEfficiencyLiabilityMember 2018-12-31 0001666175 us-gaap:RemovalCostsMember 2018-12-31 0001666175 us-gaap:RemovalCostsMember 2019-12-31 0001666175 us-gaap:RenewableEnergyProgramMember 2019-12-31 0001666175 fts:EnergyRelatedDerivativesSubjecttoRegulatoryDeferralMember us-gaap:DeferredDerivativeGainLossMember 2019-12-31 0001666175 fts:ElectricandGasModeratorAccountMember 2019-12-31 0001666175 fts:EnergyRelatedDerivativesSubjecttoRegulatoryDeferralMember us-gaap:DeferredDerivativeGainLossMember 2018-12-31 0001666175 us-gaap:DeferredIncomeTaxChargesMember 2019-12-31 0001666175 us-gaap:PensionAndOtherPostretirementPlansCostsMember 2018-12-31 0001666175 fts:UNSEnergyCorporationMember us-gaap:AssetRetirementObligationCostsMember 2018-12-31 0001666175 fts:EstimatedReturnonEquityRefundMember 2018-12-31 0001666175 fts:ElectricandGasModeratorAccountMember 2018-12-31 0001666175 us-gaap:OtherRegulatoryAssetsLiabilitiesMember 2018-12-31 0001666175 us-gaap:EnvironmentalRestorationCostsMember 2018-12-31 0001666175 fts:OtherRegulatoryLiabilitiesIndividuallyLessThanThresholdMember 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember fts:ElectricandGasModeratorAccountMember 2018-01-01 2018-12-31 0001666175 fts:TucsonElectricPowerCompanyMember us-gaap:AssetRetirementObligationCostsMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember 2018-12-31 0001666175 fts:BelizeElectricityLimitedMember 2018-12-31 0001666175 us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember 2019-12-31 0001666175 us-gaap:SupplementalEmployeeRetirementPlanDefinedBenefitMember 2018-12-31 0001666175 fts:FortisAlbertaInc.Member us-gaap:ElectricDistributionMember fts:DeferredOperatingOverheadCostMember 2019-12-31 0001666175 fts:FortisAlbertaInc.Member us-gaap:ElectricDistributionMember fts:DeferredOperatingOverheadCostMember 2018-12-31 0001666175 us-gaap:GasDistributionMember 2018-12-31 0001666175 us-gaap:ElectricTransmissionMember 2018-12-31 0001666175 us-gaap:ElectricDistributionMember 2018-12-31 0001666175 us-gaap:ElectricityGenerationPlantNonNuclearMember 2018-12-31 0001666175 us-gaap:GasTransmissionMember 2018-12-31 0001666175 us-gaap:AssetUnderConstructionMember 2018-12-31 0001666175 us-gaap:LandMember 2018-12-31 0001666175 us-gaap:PropertyPlantAndEquipmentOtherTypesMember 2018-12-31 0001666175 fts:JointlyOwnedElectricityGenerationPlantFourCornersUnits4and5Member 2019-12-31 0001666175 fts:JointlyOwnedElectricityGenerationPlantGilaRiverCommonFacilitiesMember 2019-12-31 0001666175 fts:JointlyOwnedElectricityGenerationPlantSanJuanUnit1Member 2019-12-31 0001666175 fts:JointlyOwnedElectricityGenerationPlantLunaEnergyFacilityMember 2019-12-31 0001666175 us-gaap:JointlyOwnedElectricityTransmissionAndDistributionSystemMember 2019-12-31 0001666175 fts:JointlyOwnedElectricityGenerationPlantSpringervilleCoalHandlingFacilitiesMember 2019-12-31 0001666175 us-gaap:AssetUnderConstructionMember 2019-12-31 0001666175 us-gaap:ElectricDistributionMember 2019-12-31 0001666175 us-gaap:ElectricTransmissionMember 2019-12-31 0001666175 us-gaap:GasDistributionMember 2019-12-31 0001666175 us-gaap:ElectricityGenerationPlantNonNuclearMember 2019-12-31 0001666175 us-gaap:PropertyPlantAndEquipmentOtherTypesMember 2019-12-31 0001666175 us-gaap:GasTransmissionMember 2019-12-31 0001666175 us-gaap:LandMember 2019-12-31 0001666175 srt:MinimumMember us-gaap:JointlyOwnedElectricityTransmissionAndDistributionSystemMember 2019-12-31 0001666175 srt:MaximumMember us-gaap:JointlyOwnedElectricityTransmissionAndDistributionSystemMember 2019-12-31 0001666175 fts:LandTransmissionandWaterRightsMember 2018-12-31 0001666175 fts:LandTransmissionandWaterRightsMember 2019-12-31 0001666175 us-gaap:ComputerSoftwareIntangibleAssetMember 2019-12-31 0001666175 fts:LandTransmissionandWaterRightsMember 2019-12-31 0001666175 us-gaap:OtherIntangibleAssetsMember 2019-12-31 0001666175 us-gaap:AssetUnderConstructionMember 2019-12-31 0001666175 us-gaap:ComputerSoftwareIntangibleAssetMember 2018-12-31 0001666175 fts:LandTransmissionandWaterRightsMember 2018-12-31 0001666175 us-gaap:AssetUnderConstructionMember 2018-12-31 0001666175 us-gaap:OtherIntangibleAssetsMember 2018-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:ThirtyYearThreePointThreeZeroFirstMortgageBondsMember us-gaap:SecuredDebtMember 2019-08-31 0001666175 fts:ITCHoldingsCorp.Member fts:ThirtyYearFourPointSixFivePercentSecuredNotesMember us-gaap:SecuredDebtMember 2019-07-31 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member fts:ThirtyYearFourPointOneFourPercentUnsecuredNotesMember us-gaap:UnsecuredDebtMember 2019-05-31 0001666175 fts:FortisBCEnergyInc.Member fts:ThirtyYearTwoPointEightTwoPercentUnsecuredDebenturesMember us-gaap:UnsecuredDebtMember 2019-08-31 0001666175 fts:ITCHoldingsCorp.Member fts:ThirtyYearFourPointFiveFiveSecuredNotesMember us-gaap:SecuredDebtMember 2019-01-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember fts:ThirtyYearThreePointEightNinePercentUnsecuredNotesMember us-gaap:UnsecuredDebtMember 2019-10-31 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member fts:ThirtyYearFourPointOneFourPercentUnsecuredNotesMember us-gaap:UnsecuredDebtMember 2019-08-31 0001666175 fts:FortisTurksandCaicosMember fts:SixYearFloatingRateUnsecuredNonrevolvingTermLoanMember us-gaap:UnsecuredDebtMember 2019-02-28 0001666175 fts:CaribbeanUtilitiesCompanyLtd.Member fts:TwentyYearThreePointEightThreePercentUnsecuredNotesMember us-gaap:UnsecuredDebtMember 2019-08-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember fts:FortyYearThreePointNineNinePercentUnsecuredNotesMember us-gaap:UnsecuredDebtMember 2019-10-31 0001666175 fts:ITCHoldingsCorp.Member fts:TwoYearFloatingRateUnsecuredTermLoanCreditAgreementMember us-gaap:UnsecuredDebtMember 2019-06-30 0001666175 fts:ThreePointZeroFiveFivePercentUnsecuredSeniorNotesMember 2019-12-31 0001666175 fts:TwoPointOneZeroPercentUnsecuredNotesMember 2019-12-31 0001666175 fts:ThreePointZeroFiveFivePercentUnsecuredSeniorNotesMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:TwoYearFloatingRateUnsecuredTermLoanCreditAgreementMember us-gaap:UnsecuredDebtMember us-gaap:SubsequentEventMember 2020-01-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember us-gaap:RevolvingCreditFacilityMember us-gaap:DebtInstrumentRedemptionPeriodTwoMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 fts:OtherElectricMember us-gaap:RevolvingCreditFacilityMember us-gaap:DebtInstrumentRedemptionPeriodOneMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 us-gaap:LineOfCreditMember us-gaap:LenderConcentrationRiskMember fts:NoOneBankMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member us-gaap:UnsecuredDebtMember us-gaap:SubsequentEventMember 2020-01-31 0001666175 us-gaap:RevolvingCreditFacilityMember us-gaap:DebtInstrumentRedemptionPeriodOneMember us-gaap:UnregulatedOperationMember 2019-12-31 0001666175 us-gaap:LineOfCreditMember 2019-12-31 0001666175 fts:OtherElectricMember us-gaap:RevolvingCreditFacilityMember us-gaap:RegulatedOperationMember us-gaap:SubsequentEventMember 2020-02-13 0001666175 fts:ITCHoldingsCorp.Member us-gaap:CommercialPaperMember 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember us-gaap:RevolvingCreditFacilityMember us-gaap:DebtInstrumentRedemptionPeriodOneMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 srt:MaximumMember 2019-12-31 0001666175 fts:OtherElectricMember us-gaap:RevolvingCreditFacilityMember us-gaap:DebtInstrumentRedemptionPeriodTwoMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 us-gaap:LineOfCreditMember 2018-12-31 0001666175 fts:FortisInc.Member us-gaap:RevolvingCreditFacilityMember 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:TwoYearFloatingRateUnsecuredTermLoanCreditAgreementMember us-gaap:UnsecuredDebtMember us-gaap:LondonInterbankOfferedRateLIBORMember 2019-06-01 2019-06-30 0001666175 fts:OtherElectricMember us-gaap:RevolvingCreditFacilityMember us-gaap:DebtInstrumentRedemptionPeriodThreeMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 fts:FortisTurksandCaicosMember fts:SixYearFloatingRateUnsecuredNonrevolvingTermLoanMember us-gaap:UnsecuredDebtMember us-gaap:LondonInterbankOfferedRateLIBORMember 2019-02-01 2019-02-28 0001666175 us-gaap:RevolvingCreditFacilityMember us-gaap:DebtInstrumentRedemptionPeriodTwoMember us-gaap:UnregulatedOperationMember 2019-12-31 0001666175 us-gaap:RevolvingCreditFacilityMember us-gaap:UnregulatedOperationMember 2019-12-31 0001666175 fts:TwoPointOneZeroPercentUnsecuredNotesMember 2019-01-01 2019-12-31 0001666175 fts:CommittedCreditFacilitiesMaturing2020through2024Member 2019-12-31 0001666175 fts:FixedRateUnsecuredUSTermLoanCreditAgreementMember us-gaap:UnsecuredDebtMember fts:ITCHoldingsCorp.Member 2018-12-31 0001666175 fts:FixedRateSecuredDebenturesMember us-gaap:SecuredDebtMember fts:FortisBCInc.Member 2019-12-31 0001666175 fts:FixedRateUnsecuredSeniorNotes2.85Member us-gaap:UnsecuredDebtMember us-gaap:CorporateAndOtherMember 2018-12-31 0001666175 fts:FixedRateUnsecuredUSSeniorNotesandPromissoryNotesMember us-gaap:UnsecuredDebtMember us-gaap:CorporateAndOtherMember 2018-12-31 0001666175 fts:FixedRateUnsecuredDebenturesMember us-gaap:UnsecuredDebtMember fts:FortisBCEnergyInc.Member 2019-12-31 0001666175 fts:FixedRateSecuredUSSeniorNotesMember us-gaap:SecuredDebtMember fts:ITCHoldingsCorp.Member 2019-12-31 0001666175 fts:FixedRateUnsecuredDebenturesMember us-gaap:UnsecuredDebtMember fts:FortisBCEnergyInc.Member 2018-12-31 0001666175 fts:FixedRateandVariableUnsecuredUSPromissoryNotesMember us-gaap:UnsecuredDebtMember fts:CentralHudsonGasandElectricCorporationMember 2019-12-31 0001666175 fts:FixedRateUnsecuredUSFixedRateNotesMember us-gaap:UnsecuredDebtMember fts:UNSEnergyCorporationMember 2018-12-31 0001666175 fts:FixedRateandVariableUnsecuredUSPromissoryNotesMember us-gaap:UnsecuredDebtMember fts:CentralHudsonGasandElectricCorporationMember 2018-12-31 0001666175 fts:ITCHoldingsCorp.Member 2019-12-31 0001666175 fts:FixedRateSecuredFirstMortgageBondsMember us-gaap:SecuredDebtMember fts:OtherElectricMember 2019-12-31 0001666175 fts:FixedRateSecuredUSFirstMortgageBondsMember us-gaap:SecuredDebtMember fts:ITCHoldingsCorp.Member 2018-12-31 0001666175 fts:FixedRateUnsecuredDebenturesMember us-gaap:UnsecuredDebtMember fts:FortisAlbertaInc.Member 2019-12-31 0001666175 fts:FixedRateSecuredDebenturesMember us-gaap:SecuredDebtMember fts:FortisBCInc.Member 2018-12-31 0001666175 fts:FixedRateUnsecuredUSSeniorNotesMemberMember us-gaap:UnsecuredDebtMember fts:ITCHoldingsCorp.Member 2018-12-31 0001666175 fts:FixedRateUnsecuredUSSeniorNotesandPromissoryNotesMember us-gaap:UnsecuredDebtMember us-gaap:CorporateAndOtherMember 2019-12-31 0001666175 fts:FixedRateSecuredUSFirstMortgageBondsMember us-gaap:SecuredDebtMember fts:ITCHoldingsCorp.Member 2019-12-31 0001666175 fts:FixedRateSecuredUSSeniorNotesMember us-gaap:SecuredDebtMember fts:ITCHoldingsCorp.Member 2018-12-31 0001666175 fts:FixedRateandVariableUnsecuredUSTaxExemptBondsMember us-gaap:UnsecuredDebtMember fts:UNSEnergyCorporationMember 2018-12-31 0001666175 fts:FixedRateUnsecuredUSShareholderNoteMember us-gaap:UnsecuredDebtMember fts:ITCHoldingsCorp.Member 2018-12-31 0001666175 fts:FixedRateUnsecuredDebenturesMember us-gaap:UnsecuredDebtMember us-gaap:CorporateAndOtherMember 2019-12-31 0001666175 fts:FixedRateUnsecuredSeniorNotes2.85Member us-gaap:UnsecuredDebtMember us-gaap:CorporateAndOtherMember 2019-12-31 0001666175 fts:FixedRateUnsecuredDebenturesMember us-gaap:UnsecuredDebtMember fts:FortisAlbertaInc.Member 2018-12-31 0001666175 fts:FixedRateandVariableUnsecuredUSSeniorLoanNotesandBondsMember us-gaap:UnsecuredDebtMember fts:OtherElectricMember 2018-12-31 0001666175 fts:FixedRateUnsecuredSeniorNotesMember us-gaap:UnsecuredDebtMember fts:OtherElectricMember 2019-12-31 0001666175 fts:FixedRateUnsecuredUSTermLoanCreditAgreementMember us-gaap:UnsecuredDebtMember fts:ITCHoldingsCorp.Member 2019-12-31 0001666175 fts:FixedRateUnsecuredUSSeniorNotesMemberMember us-gaap:UnsecuredDebtMember fts:ITCHoldingsCorp.Member 2019-12-31 0001666175 fts:FixedRateSecuredFirstMortgageSinkingFundBondsMember us-gaap:SecuredDebtMember fts:OtherElectricMember 2019-12-31 0001666175 fts:FixedRateSecuredFirstMortgageSinkingFundBondsMember us-gaap:SecuredDebtMember fts:OtherElectricMember 2018-12-31 0001666175 fts:FixedRateUnsecuredUSFixedRateNotesMember us-gaap:UnsecuredDebtMember fts:UNSEnergyCorporationMember 2019-12-31 0001666175 fts:FixedRateandVariableUnsecuredUSTaxExemptBondsMember us-gaap:UnsecuredDebtMember fts:UNSEnergyCorporationMember 2019-12-31 0001666175 fts:FixedRateandVariableUnsecuredUSSeniorLoanNotesandBondsMember us-gaap:UnsecuredDebtMember fts:OtherElectricMember 2019-12-31 0001666175 fts:FixedRateUnsecuredDebenturesMember us-gaap:UnsecuredDebtMember fts:FortisBCInc.Member 2018-12-31 0001666175 fts:LongtermCreditFacilityBorrowingsMember us-gaap:LineOfCreditMember 2019-12-31 0001666175 fts:FixedRateSecuredFirstMortgageBondsMember us-gaap:SecuredDebtMember fts:OtherElectricMember 2018-12-31 0001666175 fts:FixedRateUnsecuredSeniorNotesMember us-gaap:UnsecuredDebtMember fts:OtherElectricMember 2018-12-31 0001666175 fts:FixedRateUnsecuredUSShareholderNoteMember us-gaap:UnsecuredDebtMember fts:ITCHoldingsCorp.Member 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member 2018-12-31 0001666175 fts:LongtermCreditFacilityBorrowingsMember us-gaap:LineOfCreditMember 2018-12-31 0001666175 fts:FixedRateUnsecuredDebenturesMember us-gaap:UnsecuredDebtMember us-gaap:CorporateAndOtherMember 2018-12-31 0001666175 fts:FixedRateUnsecuredDebenturesMember us-gaap:UnsecuredDebtMember fts:FortisBCInc.Member 2019-12-31 0001666175 fts:OtherElectricMember fts:UnsecuredDemandCreditFacilityandEmergencyStandbyLoanMember 2019-12-31 0001666175 fts:OtherElectricMember us-gaap:RevolvingCreditFacilityMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 fts:UNSEnergyCorporationMember us-gaap:RevolvingCreditFacilityMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 fts:FortisAlbertaInc.Member us-gaap:RevolvingCreditFacilityMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 fts:OtherElectricMember fts:UnsecuredDemandCreditFacilityMember 2019-12-31 0001666175 fts:FortisBCEnergyInc.Member us-gaap:RevolvingCreditFacilityMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 fts:FortisBCInc.Member us-gaap:RevolvingCreditFacilityMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 fts:UNSEnergyCorporationMember fts:UnsecuredNonrevolvingFacilityMember 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember fts:UncommittedCreditFacilityMember 2019-12-31 0001666175 fts:FortisBCInc.Member fts:DemandOverdraftFacilityMember 2019-12-31 0001666175 fts:FortisInc.Member fts:UnsecuredNonrevolvingFacilityMember 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member us-gaap:RevolvingCreditFacilityMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember us-gaap:RevolvingCreditFacilityMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 us-gaap:UnregulatedOperationMember 2019-12-31 0001666175 fts:LongtermCreditFacilityBorrowingsMember us-gaap:UnregulatedOperationMember 2019-12-31 0001666175 fts:LongtermCreditFacilityBorrowingsMember 2019-12-31 0001666175 us-gaap:RegulatedOperationMember 2019-12-31 0001666175 us-gaap:LineOfCreditMember 2018-12-31 0001666175 us-gaap:UnregulatedOperationMember us-gaap:LineOfCreditMember 2019-12-31 0001666175 us-gaap:LineOfCreditMember 2019-12-31 0001666175 fts:LongtermCreditFacilityBorrowingsMember 2018-12-31 0001666175 us-gaap:RegulatedOperationMember us-gaap:LineOfCreditMember 2019-12-31 0001666175 fts:LongtermCreditFacilityBorrowingsMember us-gaap:RegulatedOperationMember 2019-12-31 0001666175 fts:TucsonElectricPowerCompanyMember fts:SpringervilleCommonFacilitiesMember 2019-01-01 2019-12-31 0001666175 fts:TucsonElectricPowerCompanyMember fts:SpringervilleCommonFacilitiesMember 2019-12-31 0001666175 fts:TucsonElectricPowerCompanyMember fts:GilaRiverUnit2Member 2019-12-01 2019-12-31 0001666175 fts:PropertyPlantandEquipmentnetMember 2019-12-31 0001666175 fts:RegulatoryAssetsMember 2019-12-31 0001666175 fts:TucsonElectricPowerCompanyMember 2019-12-31 0001666175 fts:CentralHudsonGasandElectricCorporationMember us-gaap:AccountsPayableAndAccruedLiabilitiesMember 2019-12-31 0001666175 fts:FortisBCEnergyInc.Member fts:MunicipalNaturalGasDistributionAssetsMember 2019-11-01 2019-11-30 0001666175 fts:CentralHudsonGasandElectricCorporationMember 2019-12-31 0001666175 fts:FortisBCEnergyInc.Member fts:MunicipalNaturalGasDistributionAssetsMember 2018-10-01 2018-10-31 0001666175 fts:FortisBCEnergyInc.Member srt:MaximumMember fts:MunicipalNaturalGasDistributionAssetsMember 2019-12-31 0001666175 fts:FortisBCEnergyInc.Member fts:MunicipalNaturalGasDistributionAssetsMember 2019-01-01 2019-12-31 0001666175 fts:FortisBCEnergyInc.Member srt:MinimumMember fts:MunicipalNaturalGasDistributionAssetsMember 2019-12-31 0001666175 fts:TucsonElectricPowerCompanyMember fts:MineReclamationMember 2019-12-31 0001666175 fts:FortisBCEnergyInc.Member 2018-12-31 0001666175 us-gaap:CommonStockMember fts:Other2019IssuancesMember 2019-12-31 0001666175 us-gaap:CommonStockMember fts:AtthemarketMember 2019-01-01 2019-12-31 0001666175 us-gaap:CommonStockMember fts:Other2019IssuancesMember 2019-01-01 2019-12-31 0001666175 fts:SeriesJPreferredStockMember 2018-12-01 0001666175 srt:ScenarioForecastMember fts:SeriesIPreferredStockMember 2020-06-01 0001666175 fts:SeriesKPreferredStockMember 2019-01-01 2019-02-28 0001666175 srt:ScenarioForecastMember fts:SeriesMPreferredStockMember 2019-12-01 2024-11-30 0001666175 fts:SeriesIPreferredStockMember 2019-12-31 0001666175 fts:SeriesMPreferredStockMember 2019-01-01 2019-11-30 0001666175 srt:ScenarioForecastMember fts:SeriesKPreferredStockMember 2019-03-01 2024-02-29 0001666175 fts:FixedRateMember 2019-12-31 0001666175 srt:ScenarioForecastMember fts:SeriesJPreferredStockMember 2021-12-01 0001666175 us-gaap:SeriesGPreferredStockMember 2018-12-31 0001666175 us-gaap:SeriesGPreferredStockMember 2019-12-31 0001666175 fts:SeriesKPreferredStockMember 2018-12-31 0001666175 fts:SeriesMPreferredStockMember 2018-12-31 0001666175 us-gaap:SeriesHPreferredStockMember 2018-12-31 0001666175 fts:SeriesMPreferredStockMember 2019-12-31 0001666175 fts:SeriesJPreferredStockMember 2018-12-31 0001666175 fts:SeriesIPreferredStockMember 2018-12-31 0001666175 us-gaap:SeriesFPreferredStockMember 2018-12-31 0001666175 us-gaap:SeriesHPreferredStockMember 2019-12-31 0001666175 us-gaap:SeriesFPreferredStockMember 2019-12-31 0001666175 fts:SeriesJPreferredStockMember 2019-12-31 0001666175 fts:SeriesKPreferredStockMember 2019-12-31 0001666175 fts:SeriesLPreferredStockMember 2019-01-01 2019-12-31 0001666175 us-gaap:SeriesGPreferredStockMember 2019-01-01 2019-12-31 0001666175 fts:SeriesKPreferredStockMember 2019-01-01 2019-12-31 0001666175 us-gaap:SeriesFPreferredStockMember 2019-01-01 2019-12-31 0001666175 fts:SeriesMPreferredStockMember 2019-01-01 2019-12-31 0001666175 us-gaap:SeriesHPreferredStockMember 2019-01-01 2019-12-31 0001666175 fts:SeriesLPreferredStockMember 2019-12-31 0001666175 fts:SeriesIPreferredStockMember 2019-01-01 2019-12-31 0001666175 fts:SeriesNPreferredStockMember 2019-12-31 0001666175 fts:SeriesNPreferredStockMember 2019-01-01 2019-12-31 0001666175 fts:SeriesJPreferredStockMember 2019-01-01 2019-12-31 0001666175 fts:AccumulatedForeignCurrencyAdjustmentAttributabletoParentUnrealizedForeignCurrencyTranslationGainsLossesonNetInvestmentinForeignOperationsMember 2019-01-01 2019-12-31 0001666175 fts:AccumulatedForeignCurrencyAdjustmentAttributabletoParentUnrealizedForeignCurrencyTranslationGainsLossesonNetInvestmentinForeignOperationsMember 2018-12-31 0001666175 fts:AccumulatedForeignCurrencyAdjustmentPortionAttributabletoParentGainsLossesonHedgeofNetInvestmentsinForeignOperationsMember 2019-01-01 2019-12-31 0001666175 us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember 2019-01-01 2019-12-31 0001666175 fts:AccumulatedForeignCurrencyAdjustmentPortionAttributabletoParentGainsLossesonHedgeofNetInvestmentsinForeignOperationsMember 2019-12-31 0001666175 fts:AccumulatedNetGainLossfromCashFlowHedgesandDefinedBenefitPlansAdjustmentAttributabletoParentMember 2018-01-01 2018-12-31 0001666175 fts:AccumulatedNetGainLossfromCashFlowHedgesandDefinedBenefitPlansAdjustmentAttributabletoParentMember 2019-12-31 0001666175 us-gaap:AccumulatedTranslationAdjustmentMember 2018-12-31 0001666175 us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember 2018-12-31 0001666175 fts:AccumulatedForeignCurrencyAdjustmentPortionAttributabletoParentGainsLossesonHedgeofNetInvestmentsinForeignOperationsMember 2017-12-31 0001666175 fts:AccumulatedNetGainLossfromCashFlowHedgesandDefinedBenefitPlansAdjustmentAttributabletoParentMember 2018-12-31 0001666175 us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember 2017-12-31 0001666175 fts:AccumulatedNetGainLossfromCashFlowHedgesandDefinedBenefitPlansAdjustmentAttributabletoParentMember 2017-12-31 0001666175 us-gaap:AccumulatedTranslationAdjustmentMember 2018-01-01 2018-12-31 0001666175 us-gaap:AccumulatedTranslationAdjustmentMember 2019-01-01 2019-12-31 0001666175 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-12-31 0001666175 fts:AccumulatedForeignCurrencyAdjustmentPortionAttributabletoParentGainsLossesonHedgeofNetInvestmentsinForeignOperationsMember 2018-12-31 0001666175 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2018-01-01 2018-12-31 0001666175 fts:AccumulatedNetGainLossfromCashFlowHedgesandDefinedBenefitPlansAdjustmentAttributabletoParentMember 2019-01-01 2019-12-31 0001666175 fts:AccumulatedForeignCurrencyAdjustmentAttributabletoParentUnrealizedForeignCurrencyTranslationGainsLossesonNetInvestmentinForeignOperationsMember 2019-12-31 0001666175 fts:AccumulatedForeignCurrencyAdjustmentAttributabletoParentUnrealizedForeignCurrencyTranslationGainsLossesonNetInvestmentinForeignOperationsMember 2017-12-31 0001666175 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2017-12-31 0001666175 us-gaap:AccumulatedTranslationAdjustmentMember 2019-12-31 0001666175 us-gaap:AccumulatedTranslationAdjustmentMember 2017-12-31 0001666175 us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember 2019-12-31 0001666175 fts:AccumulatedForeignCurrencyAdjustmentPortionAttributabletoParentGainsLossesonHedgeofNetInvestmentsinForeignOperationsMember 2018-01-01 2018-12-31 0001666175 fts:AccumulatedForeignCurrencyAdjustmentAttributabletoParentUnrealizedForeignCurrencyTranslationGainsLossesonNetInvestmentinForeignOperationsMember 2018-01-01 2018-12-31 0001666175 us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedgesMember 2018-01-01 2018-12-31 0001666175 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2019-12-31 0001666175 us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember 2019-01-01 2019-12-31 0001666175 srt:DirectorMember fts:DirectorsDeferredShareUnitMember 2019-01-01 2019-12-31 0001666175 srt:DirectorMember fts:DirectorsDeferredShareUnitMember 2018-01-01 2018-12-31 0001666175 srt:DirectorMember fts:DirectorsDeferredShareUnitMember 2017-12-31 0001666175 us-gaap:EmployeeStockOptionMember 2018-01-01 2018-12-31 0001666175 us-gaap:PerformanceSharesMember 2018-01-01 2018-12-31 0001666175 us-gaap:PerformanceSharesMember 2017-12-31 0001666175 us-gaap:EmployeeStockOptionMember 2018-03-01 2018-03-31 0001666175 us-gaap:EmployeeStockOptionMember 2018-02-01 2018-02-28 0001666175 us-gaap:EmployeeStockOptionMember 2019-02-01 2019-02-28 0001666175 us-gaap:RestrictedStockUnitsRSUMember 2018-01-01 2018-12-31 0001666175 srt:MaximumMember us-gaap:PerformanceSharesMember 2019-01-01 2019-12-31 0001666175 srt:MinimumMember us-gaap:PerformanceSharesMember 2019-01-01 2019-12-31 0001666175 us-gaap:RestrictedStockUnitsRSUMember 2017-12-31 0001666175 fts:WanetaExpansionLimitedPartnershipMember 2019-04-16 2019-04-16 0001666175 fts:WanetaExpansionLimitedPartnershipMember 2019-01-01 2019-04-16 0001666175 fts:WanetaExpansionLimitedPartnershipMember 2019-04-16 0001666175 fts:WanetaExpansionLimitedPartnershipMember 2019-04-16 2019-04-16 0001666175 fts:WanetaExpansionLimitedPartnershipMember 2018-01-01 2018-12-31 0001666175 us-gaap:DomesticCountryMember 2019-12-31 0001666175 us-gaap:DomesticCountryMember us-gaap:CapitalLossCarryforwardMember 2019-12-31 0001666175 us-gaap:ForeignCountryMember 2019-12-31 0001666175 us-gaap:ForeignCountryMember fts:OtherTaxCreditCarryforwardMember 2019-12-31 0001666175 us-gaap:DomesticCountryMember fts:OtherTaxCreditCarryforwardMember 2019-12-31 0001666175 us-gaap:DomesticCountryMember us-gaap:GeneralBusinessMember 2019-12-31 0001666175 us-gaap:PensionPlansDefinedBenefitMember 2018-12-31 0001666175 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-01-01 2019-12-31 0001666175 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-12-31 0001666175 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2017-12-31 0001666175 us-gaap:PensionPlansDefinedBenefitMember 2019-12-31 0001666175 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-12-31 0001666175 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-01-01 2018-12-31 0001666175 us-gaap:PensionPlansDefinedBenefitMember 2018-01-01 2018-12-31 0001666175 us-gaap:PensionPlansDefinedBenefitMember 2019-01-01 2019-12-31 0001666175 us-gaap:PensionPlansDefinedBenefitMember 2017-12-31 0001666175 us-gaap:FairValueInputsLevel3Member 2019-01-01 2019-12-31 0001666175 us-gaap:FairValueInputsLevel3Member 2019-12-31 0001666175 us-gaap:FairValueInputsLevel3Member 2018-12-31 0001666175 us-gaap:FairValueInputsLevel3Member 2017-12-31 0001666175 us-gaap:FairValueInputsLevel3Member 2018-01-01 2018-12-31 0001666175 us-gaap:EquitySecuritiesMember 2019-12-31 0001666175 us-gaap:CashAndCashEquivalentsMember 2019-12-31 0001666175 us-gaap:EquitySecuritiesMember 2018-12-31 0001666175 us-gaap:CashAndCashEquivalentsMember 2018-12-31 0001666175 us-gaap:FixedIncomeSecuritiesMember 2019-12-31 0001666175 us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0001666175 us-gaap:RealEstateMember 2019-12-31 0001666175 us-gaap:RealEstateMember 2018-12-31 0001666175 us-gaap:FixedIncomeSecuritiesMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0001666175 us-gaap:FairValueInputsLevel2Member 2019-12-31 0001666175 us-gaap:FixedIncomeSecuritiesMember us-gaap:FairValueInputsLevel3Member 2018-12-31 0001666175 us-gaap:PrivateEquityFundsMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0001666175 us-gaap:CashAndCashEquivalentsMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0001666175 us-gaap:PrivateEquityFundsMember 2019-12-31 0001666175 us-gaap:RealEstateMember us-gaap:FairValueInputsLevel1Member 2018-12-31 0001666175 us-gaap:EquitySecuritiesMember us-gaap:FairValueInputsLevel1Member 2019-12-31 0001666175 us-gaap:CashAndCashEquivalentsMember us-gaap:FairValueInputsLevel2Member 2018-12-31 0001666175 us-gaap:PrivateEquityFundsMember us-gaap:FairValueInputsLevel3Member 2018-12-31 0001666175 us-gaap:PrivateEquityFundsMember us-gaap:FairValueInputsLevel1Member 2018-12-31 0001666175 us-gaap:PrivateEquityFundsMember 2018-12-31 0001666175 us-gaap:FairValueInputsLevel2Member 2018-12-31 0001666175 us-gaap:EquitySecuritiesMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0001666175 us-gaap:EquitySecuritiesMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0001666175 us-gaap:PrivateEquityFundsMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0001666175 us-gaap:PrivateEquityFundsMember us-gaap:FairValueInputsLevel2Member 2018-12-31 0001666175 us-gaap:RealEstateMember us-gaap:FairValueInputsLevel3Member 2018-12-31 0001666175 us-gaap:CashAndCashEquivalentsMember us-gaap:FairValueInputsLevel1Member 2019-12-31 0001666175 us-gaap:RealEstateMember us-gaap:FairValueInputsLevel1Member 2019-12-31 0001666175 us-gaap:EquitySecuritiesMember us-gaap:FairValueInputsLevel1Member 2018-12-31 0001666175 us-gaap:FixedIncomeSecuritiesMember us-gaap:FairValueInputsLevel2Member 2018-12-31 0001666175 us-gaap:PrivateEquityFundsMember us-gaap:FairValueInputsLevel1Member 2019-12-31 0001666175 us-gaap:FixedIncomeSecuritiesMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0001666175 us-gaap:CashAndCashEquivalentsMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0001666175 us-gaap:RealEstateMember us-gaap:FairValueInputsLevel2Member 2018-12-31 0001666175 us-gaap:CashAndCashEquivalentsMember us-gaap:FairValueInputsLevel1Member 2018-12-31 0001666175 us-gaap:FairValueInputsLevel1Member 2019-12-31 0001666175 us-gaap:FairValueInputsLevel1Member 2018-12-31 0001666175 us-gaap:FixedIncomeSecuritiesMember us-gaap:FairValueInputsLevel1Member 2019-12-31 0001666175 us-gaap:EquitySecuritiesMember us-gaap:FairValueInputsLevel2Member 2018-12-31 0001666175 us-gaap:CashAndCashEquivalentsMember us-gaap:FairValueInputsLevel3Member 2018-12-31 0001666175 us-gaap:RealEstateMember us-gaap:FairValueInputsLevel3Member 2019-12-31 0001666175 us-gaap:RealEstateMember us-gaap:FairValueInputsLevel2Member 2019-12-31 0001666175 us-gaap:FixedIncomeSecuritiesMember us-gaap:FairValueInputsLevel1Member 2018-12-31 0001666175 us-gaap:EquitySecuritiesMember us-gaap:FairValueInputsLevel3Member 2018-12-31 0001666175 fts:EnergyRelatedDerivativesNotSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:ForeignExchangeInterestRateandTotalReturnSwapsMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:EnergyRelatedDerivativesSubjecttoRegulatoryDeferralMember us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:EnergyRelatedDerivativesSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:EnergyRelatedDerivativesSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:ForeignExchangeInterestRateandTotalReturnSwapsMember us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:EnergyRelatedDerivativesNotSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:ForeignExchangeInterestRateandTotalReturnSwapsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:EnergyRelatedDerivativesNotSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:ForeignExchangeInterestRateandTotalReturnSwapsMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:EnergyRelatedDerivativesNotSubjecttoRegulatoryDeferralMember us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:EnergyRelatedDerivativesSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-12-31 0001666175 fts:ElectricitySwapContractsSubjecttoRegulatoryDeferralMember 2018-01-01 2018-12-31 0001666175 fts:WholesaleTradingContractsNotSubjecttoRegulatoryDeferralMember 2019-01-01 2019-12-31 0001666175 fts:ElectricityPowerPurchaseContractsSubjecttoRegulatoryDeferralMember 2019-01-01 2019-12-31 0001666175 fts:ElectricityPowerPurchaseContractsSubjecttoRegulatoryDeferralMember 2018-01-01 2018-12-31 0001666175 fts:ElectricitySwapContractsSubjecttoRegulatoryDeferralMember 2019-01-01 2019-12-31 0001666175 fts:WholesaleTradingContractsNotSubjecttoRegulatoryDeferralMember 2018-01-01 2018-12-31 0001666175 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:EnergyRelatedDerivativesNotSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:EnergyRelatedDerivativesNotSubjecttoRegulatoryDeferralMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:ForeignExchangeInterestRateandTotalReturnSwapsMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:ForeignExchangeInterestRateandTotalReturnSwapsMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:EnergyRelatedDerivativesSubjecttoRegulatoryDeferralMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:EnergyRelatedDerivativesSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:ForeignExchangeInterestRateandTotalReturnSwapsMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:EnergyRelatedDerivativesNotSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:EnergyRelatedDerivativesSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:EnergyRelatedDerivativesSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:EnergyRelatedDerivativesNotSubjecttoRegulatoryDeferralMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 fts:ForeignExchangeInterestRateandTotalReturnSwapsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0001666175 us-gaap:FairValueInputsLevel2Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2019-12-31 0001666175 us-gaap:NetInvestmentHedgingMember us-gaap:DesignatedAsHedgingInstrumentMember 2018-12-31 0001666175 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2018-12-31 0001666175 us-gaap:EnergyRelatedDerivativeMember us-gaap:NondesignatedMember 2018-01-01 2018-12-31 0001666175 srt:MaximumMember us-gaap:TotalReturnSwapMember 2019-01-01 2019-12-31 0001666175 us-gaap:TotalReturnSwapMember 2019-12-31 0001666175 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2019-12-31 0001666175 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember 2019-12-31 0001666175 us-gaap:NetInvestmentHedgingMember us-gaap:DesignatedAsHedgingInstrumentMember 2019-12-31 0001666175 us-gaap:ForeignExchangeContractMember 2018-01-01 2018-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:ThreeCustomersMember us-gaap:SalesRevenueNetMember us-gaap:CustomerConcentrationRiskMember 2019-01-01 2019-12-31 0001666175 us-gaap:TotalReturnSwapMember 2019-01-01 2019-12-31 0001666175 us-gaap:TotalReturnSwapMember 2018-01-01 2018-12-31 0001666175 us-gaap:NetInvestmentHedgingMember 2018-12-31 0001666175 us-gaap:EnergyRelatedDerivativeMember us-gaap:NondesignatedMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member us-gaap:InterestRateSwapMember 2019-12-31 0001666175 us-gaap:ForeignExchangeContractMember 2019-01-01 2019-12-31 0001666175 us-gaap:FairValueInputsLevel2Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-12-31 0001666175 us-gaap:NetInvestmentHedgingMember 2019-12-31 0001666175 us-gaap:EnergyRelatedDerivativeMember 2019-12-31 0001666175 us-gaap:EnergyRelatedDerivativeMember 2018-12-31 0001666175 fts:GasSwapContractsNotSubjecttoRegulatoryDeferralMember 2019-01-01 2019-12-31 0001666175 fts:GasSwapContractsNotSubjecttoRegulatoryDeferralMember 2018-01-01 2018-12-31 0001666175 fts:GasSupplyContractPremiumsSubjecttoRegulatoryDeferralMember 2018-01-01 2018-12-31 0001666175 fts:GasSwapContractsSubjecttoRegulatoryDeferralMember 2018-01-01 2018-12-31 0001666175 fts:GasSwapContractsSubjecttoRegulatoryDeferralMember 2019-01-01 2019-12-31 0001666175 fts:GasSupplyContractPremiumsSubjecttoRegulatoryDeferralMember 2019-01-01 2019-12-31 0001666175 srt:MinimumMember us-gaap:TotalReturnSwapMember 2019-01-01 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member us-gaap:InterestRateSwapMember 2019-01-01 2019-12-31 0001666175 fts:PowerElectricityandCapacityMember 2019-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:EasementAgreementMember 2019-12-31 0001666175 fts:TucsonElectricPowerCompanyandUNSElectricInc.Member fts:RenewablePowerMember 2019-12-31 0001666175 fts:EnvironmentalAttributionsMember 2019-12-31 0001666175 fts:FortisBCInc.Member fts:PowerElectricityandCapacityMember 2019-12-31 0001666175 fts:OtherContractualObligationMember 2019-12-31 0001666175 fts:GasTransportationandStorageServicesMember 2019-12-31 0001666175 fts:UNSEnergyCorporationMember fts:BuildtransferAgreementMember 2019-12-31 0001666175 fts:MaritimeElectricCompanyLimitedMember fts:DebtCollectionAgreementMember 2019-12-31 0001666175 fts:JointInvestmentWithOtherUtilitiesInNewYorkStateMember 2014-12-31 0001666175 fts:MaritimeElectricCompanyLimitedMember fts:PowerElectricityandCapacityMember 2019-12-31 0001666175 fts:FortisOntarioInc.Member srt:MinimumMember fts:PowerElectricityandCapacityMember 2019-01-01 2019-12-31 0001666175 fts:FortisBCHoldingsInc.Member us-gaap:IndirectGuaranteeOfIndebtednessMember 2019-12-31 0001666175 fts:MaritimeElectricCompanyLimitedMember fts:PowerElectricityandCapacityMember 2019-01-01 2019-12-31 0001666175 fts:FortisBCHoldingsInc.Member us-gaap:IndirectGuaranteeOfIndebtednessMember 2018-12-31 0001666175 fts:ITCHoldingsCorp.Member fts:EasementAgreementMember 2019-01-01 2019-12-31 0001666175 fts:UNSEnergyCorporationMember fts:GasTransportationandStorageServicesMember 2019-12-31 0001666175 fts:FortisOntarioInc.Member fts:PowerElectricityandCapacityMember 2019-12-31 0001666175 fts:FortisOntarioInc.Member srt:MaximumMember fts:PowerElectricityandCapacityMember 2019-01-01 2019-12-31 0001666175 fts:FortisBCInc.Member fts:PowerElectricityandCapacityMember 2019-12-31 0001666175 fts:FortisBCInc.Member srt:MaximumMember fts:PowerElectricityandCapacityMember 2019-01-01 2019-12-31 0001666175 fts:CHEnergyGroupMember us-gaap:PaymentGuaranteeMember 2014-12-31 0001666175 srt:MaximumMember fts:WataynikaneyapPowerLimitedPartnershipMember 2019-01-01 2019-12-31 0001666175 fts:UNSEnergyCorporationMember fts:BuildtransferAgreementMember us-gaap:SubsequentEventMember 2020-01-01 2020-01-31 0001666175 fts:UNSEnergyCorporationMember fts:BuildtransferAgreementMember 2019-01-01 2019-12-31 0001666175 fts:FortisBCEnergyInc.Member fts:GasTransportationandStorageServicesMember 2019-12-31 0001666175 fts:CHEnergyGroupMember us-gaap:IndirectGuaranteeOfIndebtednessMember 2019-12-31 0001666175 fts:TucsonElectricPowerCompanyandUNSElectricInc.Member fts:RenewablePowerMember 2019-01-01 2019-12-31 0001666175 fts:MaritimeElectricCompanyLimitedMember fts:PowerElectricityandCapacityMember us-gaap:NuclearPlantMember 2019-01-01 2019-12-31 0001666175 srt:MinimumMember fts:WataynikaneyapPowerLimitedPartnershipMember 2019-01-01 2019-12-31 0001666175 fts:FHIandFortisMember fts:ClaimRelatedtoPipelineRightsMember 2019-12-31 0001666175 fts:FortisBCInc.Member fts:WanetaExpansionLimitedPartnershipMember fts:PowerElectricityandCapacityMember 2019-01-01 2019-12-31 0001666175 fts:FortisBCInc.Member fts:PowerElectricityandCapacityMember 2019-01-01 2019-12-31 xbrli:pure fts:community iso4217:USD fts:reporting_unit iso4217:CAD iso4217:USD fts:company iso4217:CAD xbrli:shares utreg:MW fts:complaint iso4217:CAD xbrli:shares utreg:Bcf fts:station fts:complaint_period fts:mine fts:kPa fts:lease fts:kV utreg:kJ fts:contract fts:project utreg:GWh fts:agreement_renewal

Fortis Place, Suite 1100

5 Springdale Street

St. John's, Newfoundland and Labrador

Canada A1E 0E4

James R. Reid

(709) 737-2800

(Address and telephone number of Registrant's principal executive offices)

_______________________

CT Corporation System

111 Eighth Avenue

New York, New York 10011

(212) 590‑9070

(Name, address (including zip code) and telephone number (including area code) of agent for service in the United States)

Securities registered or to be registered pursuant to Section 12(b) of the Act:

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

None

(Title of Class)

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act:

None

(Title of Class)

For annual reports, indicate by check mark the information filed with this Form:

☒ Annual information form  ☒ Audited annual financial statements

Indicate the number of outstanding shares of each of the issuer's classes of capital or common stock as of the close of the period covered by the annual report.

463,274,945 Common Shares as of December 31, 2019

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files).

Yes ☒ No ☐

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 12b-2 of the Exchange Act.

Emerging growth company ☐

If an emerging growth company that prepares its financial statements in accordance with accounting principles generally accepted in the United States ("U.S. GAAP"), 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.    ☐

† The term "new or revised financial accounting standard" refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012.

EXPLANATORY NOTE

Fortis Inc. (the "Corporation" or "Fortis") is a Canadian issuer eligible to file its annual report pursuant to Section 13 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), on Form 40-F pursuant to the multi-jurisdictional disclosure system of the Exchange Act. The Corporation is a "foreign private issuer" as defined in Rule 405 under the Securities Act of 1933, as amended. Equity securities of the Corporation are accordingly exempt from Sections 14(a), 14(b), 14(c), 14(f) and 16 of the Exchange Act pursuant to Rule 3a12-3.