false--12-31Q3201900009363400000028385P15Y0.50P2MP10Y250000009100000053000000930000004800000070000000.881.770.9451.891010400000000400000000400000000400000000181925281138632324183396510138632324181925281138632324183396510138632324250000000P26YP40YP6YP25Y1000000400000002000000200000040000000020000006000000P3MP1YP1YP1YP1YP3MP1YP1YP1YP1YP3MP1YP1YP1YP1Y 0000936340 2019-01-01 2019-09-30 0000936340 dte:DTEElectricMember 2019-01-01 2019-09-30 0000936340 dte:SeriesE20175.25JuniorSubordinatedDebenturesDue2077Member 2019-01-01 2019-09-30 0000936340 dte:SeriesF20166.00JuniorSubordinatedDebenturesDue2076Member 2019-01-01 2019-09-30 0000936340 us-gaap:CommonStockMember 2019-01-01 2019-09-30 0000936340 dte:SeriesC20125.25JuniorSubordinatedDebenturesDue2062Member 2019-01-01 2019-09-30 0000936340 dte:SeriesB20165.375JuniorSubordinatedDebenturesDue2076Member 2019-01-01 2019-09-30 0000936340 2019-09-30 0000936340 dte:DTEElectricMember 2019-09-30 0000936340 2018-07-01 2018-09-30 0000936340 2018-01-01 2018-09-30 0000936340 2019-07-01 2019-09-30 0000936340 2018-12-31 0000936340 2017-12-31 0000936340 2018-09-30 0000936340 us-gaap:RetainedEarningsMember 2018-04-01 2018-06-30 0000936340 us-gaap:RetainedEarningsMember 2018-07-01 2018-09-30 0000936340 2018-01-01 2018-03-31 0000936340 us-gaap:NoncontrollingInterestMember 2018-07-01 2018-09-30 0000936340 2018-04-01 2018-06-30 0000936340 us-gaap:CommonStockMember 2018-07-01 2018-09-30 0000936340 us-gaap:CommonStockMember 2018-09-30 0000936340 us-gaap:RetainedEarningsMember 2018-01-01 2018-03-31 0000936340 2018-01-01 0000936340 us-gaap:CommonStockMember 2018-01-01 2018-03-31 0000936340 us-gaap:RetainedEarningsMember 2018-03-31 0000936340 us-gaap:RetainedEarningsMember 2017-12-31 0000936340 us-gaap:RetainedEarningsMember 2018-06-30 0000936340 2018-06-30 0000936340 us-gaap:CommonStockMember 2018-04-01 2018-06-30 0000936340 us-gaap:CommonStockMember 2018-06-30 0000936340 us-gaap:CommonStockMember 2018-03-31 0000936340 2018-03-31 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-03-31 0000936340 us-gaap:NoncontrollingInterestMember 2018-04-01 2018-06-30 0000936340 us-gaap:CommonStockMember 2017-12-31 0000936340 us-gaap:NoncontrollingInterestMember 2017-12-31 0000936340 us-gaap:NoncontrollingInterestMember 2018-03-31 0000936340 us-gaap:RetainedEarningsMember 2018-01-01 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-01-01 2018-03-31 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-04-01 2018-06-30 0000936340 us-gaap:RetainedEarningsMember 2018-09-30 0000936340 us-gaap:NoncontrollingInterestMember 2018-01-01 2018-03-31 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-01-01 0000936340 us-gaap:NoncontrollingInterestMember 2018-06-30 0000936340 us-gaap:NoncontrollingInterestMember 2018-09-30 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-12-31 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-07-01 2018-09-30 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-09-30 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-06-30 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-04-01 2019-06-30 0000936340 us-gaap:CommonStockMember 2019-09-30 0000936340 us-gaap:NoncontrollingInterestMember 2019-03-31 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-01-01 2019-03-31 0000936340 us-gaap:NoncontrollingInterestMember 2019-04-01 2019-06-30 0000936340 us-gaap:CommonStockMember 2019-06-30 0000936340 2019-04-01 2019-06-30 0000936340 2019-01-01 2019-03-31 0000936340 us-gaap:CommonStockMember 2019-03-31 0000936340 us-gaap:NoncontrollingInterestMember 2019-07-01 2019-09-30 0000936340 us-gaap:CommonStockMember 2019-04-01 2019-06-30 0000936340 us-gaap:NoncontrollingInterestMember 2019-01-01 2019-03-31 0000936340 2019-03-31 0000936340 us-gaap:RetainedEarningsMember 2019-01-01 2019-03-31 0000936340 us-gaap:CommonStockMember 2019-01-01 2019-03-31 0000936340 us-gaap:RetainedEarningsMember 2019-01-01 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-09-30 0000936340 us-gaap:RetainedEarningsMember 2019-09-30 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-03-31 0000936340 us-gaap:RetainedEarningsMember 2019-07-01 2019-09-30 0000936340 us-gaap:NoncontrollingInterestMember 2019-06-30 0000936340 us-gaap:RetainedEarningsMember 2019-03-31 0000936340 us-gaap:RetainedEarningsMember 2018-12-31 0000936340 us-gaap:RetainedEarningsMember 2019-06-30 0000936340 us-gaap:RetainedEarningsMember 2019-04-01 2019-06-30 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-12-31 0000936340 us-gaap:CommonStockMember 2019-07-01 2019-09-30 0000936340 us-gaap:CommonStockMember 2018-12-31 0000936340 2019-06-30 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-01-01 0000936340 2019-01-01 0000936340 us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-06-30 0000936340 us-gaap:NoncontrollingInterestMember 2019-09-30 0000936340 us-gaap:NoncontrollingInterestMember 2018-12-31 0000936340 dte:DTEElectricMember 2018-01-01 2018-09-30 0000936340 dte:DTEElectricMember 2018-07-01 2018-09-30 0000936340 dte:DTEElectricMember 2019-07-01 2019-09-30 0000936340 dte:DTEElectricMember 2018-12-31 0000936340 dte:DTEElectricMember 2018-09-30 0000936340 dte:DTEElectricMember 2017-12-31 0000936340 dte:DTEElectricMember 2019-01-01 2019-03-31 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2019-01-01 2019-03-31 0000936340 dte:DTEElectricMember us-gaap:AdditionalPaidInCapitalMember 2019-09-30 0000936340 dte:DTEElectricMember 2019-04-01 2019-06-30 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2019-06-30 0000936340 dte:DTEElectricMember us-gaap:CommonStockMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2019-04-01 2019-06-30 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:CommonStockMember 2019-03-31 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2019-07-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:AdditionalPaidInCapitalMember 2019-06-30 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2019-03-31 0000936340 dte:DTEElectricMember us-gaap:CommonStockMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:CommonStockMember 2019-06-30 0000936340 dte:DTEElectricMember 2019-06-30 0000936340 dte:DTEElectricMember 2019-03-31 0000936340 dte:DTEElectricMember us-gaap:AdditionalPaidInCapitalMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:AdditionalPaidInCapitalMember 2019-03-31 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2018-04-01 2018-06-30 0000936340 dte:DTEElectricMember 2018-04-01 2018-06-30 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2018-01-01 0000936340 dte:DTEElectricMember 2018-01-01 2018-03-31 0000936340 dte:DTEElectricMember us-gaap:CommonStockMember 2018-03-31 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2018-07-01 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:CommonStockMember 2018-06-30 0000936340 dte:DTEElectricMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-01-01 0000936340 dte:DTEElectricMember us-gaap:AdditionalPaidInCapitalMember 2017-12-31 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2017-12-31 0000936340 dte:DTEElectricMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2017-12-31 0000936340 dte:DTEElectricMember us-gaap:AdditionalPaidInCapitalMember 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:CommonStockMember 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:CommonStockMember 2017-12-31 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2018-01-01 2018-03-31 0000936340 dte:DTEElectricMember us-gaap:AdditionalPaidInCapitalMember 2018-03-31 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2018-03-31 0000936340 dte:DTEElectricMember us-gaap:AdditionalPaidInCapitalMember 2018-06-30 0000936340 dte:DTEElectricMember us-gaap:RetainedEarningsMember 2018-06-30 0000936340 dte:DTEElectricMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-06-30 0000936340 dte:DTEElectricMember us-gaap:AccumulatedOtherComprehensiveIncomeMember 2018-03-31 0000936340 dte:DTEElectricMember 2018-03-31 0000936340 dte:DTEElectricMember 2018-06-30 0000936340 dte:VariableInterestEntityPrimaryBeneficiaryOtherRestrictedMember 2018-12-31 0000936340 dte:VariableInterestEntityPrimaryBeneficiaryOtherRestrictedMember 2019-09-30 0000936340 dte:VariableInterestEntityPrimaryBeneficiaryRestrictedMember 2019-09-30 0000936340 dte:VariableInterestEntityPrimaryBeneficiarySGGRestrictedMember 2019-09-30 0000936340 dte:VariableInterestEntityPrimaryBeneficiarySGGRestrictedMember 2018-12-31 0000936340 dte:VariableInterestEntityPrimaryBeneficiaryRestrictedMember 2018-12-31 0000936340 dte:VariableInterestEntityPrimaryBeneficiarySGGRestrictedMember 2019-05-01 2019-09-30 0000936340 dte:NEXUSPipelineMember 2019-09-30 0000936340 stpr:WV dte:MidstreamNaturalGasAssetsMember 2019-09-30 0000936340 dte:VariableInterestEntityPrimaryBeneficiarySGGRestrictedMember 2018-01-01 2018-12-31 0000936340 dte:VariableInterestEntityPrimaryBeneficiarySGGRestrictedMember 2019-01-01 2019-09-30 0000936340 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2018-12-31 0000936340 us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember 2019-09-30 0000936340 us-gaap:CustomerRelationshipsMember 2018-12-31 0000936340 us-gaap:CustomerRelationshipsMember 2019-09-30 0000936340 dte:DTEElectricMember dte:RenewableEnergyCreditsMember 2018-12-31 0000936340 dte:DTEElectricMember dte:EmissionAllowancesMember 2019-09-30 0000936340 us-gaap:CustomerContractsMember 2019-09-30 0000936340 dte:DTEElectricMember dte:EmissionAllowancesMember 2018-12-31 0000936340 us-gaap:CustomerContractsMember 2018-12-31 0000936340 dte:DTEElectricMember dte:RenewableEnergyCreditsMember 2019-09-30 0000936340 dte:DTEElectricMember srt:ParentCompanyMember 2019-07-01 2019-09-30 0000936340 2018-01-01 2018-12-31 0000936340 dte:DTEElectricMember srt:ParentCompanyMember 2018-07-01 2018-09-30 0000936340 dte:DTEElectricMember 2018-01-01 2018-12-31 0000936340 dte:DTEElectricMember srt:ParentCompanyMember 2018-01-01 2018-09-30 0000936340 dte:DTEElectricMember srt:ParentCompanyMember 2019-09-30 0000936340 dte:DTEElectricMember srt:ParentCompanyMember 2018-12-31 0000936340 dte:DTEElectricMember srt:ParentCompanyMember 2019-01-01 2019-09-30 0000936340 srt:MaximumMember us-gaap:CustomerRelationshipsMember 2019-01-01 2019-09-30 0000936340 srt:MaximumMember us-gaap:CustomerContractsMember 2019-01-01 2019-09-30 0000936340 srt:MinimumMember us-gaap:CustomerContractsMember 2019-01-01 2019-09-30 0000936340 srt:MinimumMember us-gaap:CustomerRelationshipsMember 2019-01-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:AccountingStandardsUpdate201602Member 2019-01-01 0000936340 us-gaap:AccountingStandardsUpdate201602Member 2019-01-01 0000936340 us-gaap:AccountingStandardsUpdate201802Member us-gaap:AccumulatedOtherComprehensiveIncomeMember 2019-01-01 0000936340 us-gaap:AccountingStandardsUpdate201802Member us-gaap:RetainedEarningsMember 2019-01-01 0000936340 dte:HeritageSustainableEnergyRenewableEnergyProjectOneMember dte:ElectricMember 2019-09-12 0000936340 dte:HeritageSustainableEnergyRenewableEnergyProjectOneMember dte:ElectricMember 2019-09-12 2019-09-12 0000936340 dte:NEXUSMember dte:GenerationPipelineLLCMember dte:GasStorageAndPipelinesMember 2019-09-20 2019-09-20 0000936340 dte:GenerationPipelineLLCMember dte:GasStorageAndPipelinesMember 2019-09-20 2019-09-20 0000936340 srt:MinimumMember dte:HeritageSustainableEnergyRenewableEnergyProjectOneMember dte:ElectricMember 2019-09-12 2019-09-12 0000936340 srt:MaximumMember dte:HeritageSustainableEnergyRenewableEnergyProjectOneMember dte:ElectricMember 2019-09-12 2019-09-12 0000936340 srt:ScenarioForecastMember dte:HeritageSustainableEnergyRenewableEnergyProjectTwoMember dte:ElectricMember 2020-01-01 2020-01-31 0000936340 2019-10-01 2019-09-30 0000936340 2022-01-01 2019-09-30 0000936340 2024-01-01 2019-09-30 0000936340 2020-01-01 2019-09-30 0000936340 2021-01-01 2019-09-30 0000936340 2019-09-30 0000936340 2023-01-01 2019-09-30 0000936340 us-gaap:FixedPriceContractMember 2019-09-30 0000936340 us-gaap:FixedPriceContractMember 2020-01-01 2019-09-30 0000936340 us-gaap:FixedPriceContractMember 2024-01-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FixedPriceContractMember 2023-01-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FixedPriceContractMember 2020-01-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FixedPriceContractMember 2021-01-01 2019-09-30 0000936340 us-gaap:FixedPriceContractMember 2023-01-01 2019-09-30 0000936340 us-gaap:FixedPriceContractMember 2022-01-01 2019-09-30 0000936340 us-gaap:FixedPriceContractMember 2021-01-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FixedPriceContractMember 2019-10-01 2019-09-30 0000936340 us-gaap:FixedPriceContractMember 2019-10-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FixedPriceContractMember 2024-01-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FixedPriceContractMember 2022-01-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FixedPriceContractMember 2019-09-30 0000936340 us-gaap:ProductAndServiceOtherMember dte:ElectricMember 2018-07-01 2018-09-30 0000936340 dte:PowerAndIndustrialProjectsMember 2018-07-01 2018-09-30 0000936340 dte:PowerAndIndustrialProjectsMember 2019-07-01 2019-09-30 0000936340 us-gaap:ProductAndServiceOtherMember dte:GasMember 2019-01-01 2019-09-30 0000936340 dte:EnergyTradingMember 2018-07-01 2018-09-30 0000936340 dte:EnergyTradingMember 2019-07-01 2019-09-30 0000936340 dte:GasStorageAndPipelinesMember 2019-07-01 2019-09-30 0000936340 dte:AlternativeRevenueProgramsMember dte:GasMember 2018-01-01 2018-09-30 0000936340 dte:EnergyTradingMember 2019-01-01 2019-09-30 0000936340 dte:PowerAndIndustrialProjectsMember 2018-01-01 2018-09-30 0000936340 us-gaap:ProductAndServiceOtherMember dte:ElectricMember 2018-01-01 2018-09-30 0000936340 us-gaap:ProductAndServiceOtherMember dte:ElectricMember 2019-01-01 2019-09-30 0000936340 us-gaap:ProductAndServiceOtherMember dte:ElectricMember 2019-07-01 2019-09-30 0000936340 dte:PowerAndIndustrialProjectsMember 2019-01-01 2019-09-30 0000936340 dte:EnergyTradingMember 2018-01-01 2018-09-30 0000936340 dte:GasStorageAndPipelinesMember 2019-01-01 2019-09-30 0000936340 us-gaap:ProductAndServiceOtherMember dte:GasMember 2019-07-01 2019-09-30 0000936340 dte:GasSalesMember dte:GasMember 2018-01-01 2018-09-30 0000936340 dte:IntermediateTransportationMember dte:GasMember 2019-01-01 2019-09-30 0000936340 dte:IntermediateTransportationMember dte:GasMember 2018-01-01 2018-09-30 0000936340 dte:ElectricMember 2018-01-01 2018-09-30 0000936340 dte:IndustrialMember dte:ElectricMember 2019-07-01 2019-09-30 0000936340 dte:IndustrialMember dte:ElectricMember 2018-01-01 2018-09-30 0000936340 dte:OtherMember dte:GasMember 2019-07-01 2019-09-30 0000936340 dte:GasStorageAndPipelinesMember 2018-01-01 2018-09-30 0000936340 dte:IndustrialMember dte:ElectricMember 2018-07-01 2018-09-30 0000936340 dte:CommercialMember dte:ElectricMember 2019-07-01 2019-09-30 0000936340 dte:GasMember 2019-01-01 2019-09-30 0000936340 dte:ResidentialMember dte:ElectricMember 2018-01-01 2018-09-30 0000936340 dte:CommercialMember dte:ElectricMember 2018-07-01 2018-09-30 0000936340 dte:OtherMember dte:ElectricMember 2019-01-01 2019-09-30 0000936340 dte:ElectricMember 2018-07-01 2018-09-30 0000936340 dte:GasMember 2018-01-01 2018-09-30 0000936340 dte:EndUserTransportationMember dte:GasMember 2018-07-01 2018-09-30 0000936340 dte:ResidentialMember dte:ElectricMember 2019-01-01 2019-09-30 0000936340 dte:OtherMember dte:GasMember 2019-01-01 2019-09-30 0000936340 dte:CommercialMember dte:ElectricMember 2019-01-01 2019-09-30 0000936340 dte:OtherMember dte:GasMember 2018-07-01 2018-09-30 0000936340 dte:CommercialMember dte:ElectricMember 2018-01-01 2018-09-30 0000936340 dte:ElectricMember 2019-01-01 2019-09-30 0000936340 dte:GasStorageAndPipelinesMember 2018-07-01 2018-09-30 0000936340 dte:OtherMember dte:ElectricMember 2018-01-01 2018-09-30 0000936340 dte:OtherMember dte:ElectricMember 2019-07-01 2019-09-30 0000936340 dte:EndUserTransportationMember dte:GasMember 2019-07-01 2019-09-30 0000936340 dte:IntermediateTransportationMember dte:GasMember 2018-07-01 2018-09-30 0000936340 dte:IndustrialMember dte:ElectricMember 2019-01-01 2019-09-30 0000936340 dte:GasMember 2018-07-01 2018-09-30 0000936340 dte:ResidentialMember dte:ElectricMember 2019-07-01 2019-09-30 0000936340 dte:ResidentialMember dte:ElectricMember 2018-07-01 2018-09-30 0000936340 dte:GasSalesMember dte:GasMember 2018-07-01 2018-09-30 0000936340 dte:GasMember 2019-07-01 2019-09-30 0000936340 dte:GasSalesMember dte:GasMember 2019-01-01 2019-09-30 0000936340 dte:EndUserTransportationMember dte:GasMember 2018-01-01 2018-09-30 0000936340 dte:OtherMember dte:ElectricMember 2018-07-01 2018-09-30 0000936340 dte:OtherMember dte:GasMember 2018-01-01 2018-09-30 0000936340 dte:ElectricMember 2019-07-01 2019-09-30 0000936340 dte:IntermediateTransportationMember dte:GasMember 2019-07-01 2019-09-30 0000936340 dte:EndUserTransportationMember dte:GasMember 2019-01-01 2019-09-30 0000936340 dte:GasSalesMember dte:GasMember 2019-07-01 2019-09-30 0000936340 us-gaap:ProductAndServiceOtherMember dte:GasMember 2018-07-01 2018-09-30 0000936340 us-gaap:ProductAndServiceOtherMember dte:GasMember 2018-01-01 2018-09-30 0000936340 dte:DTEElectricMember dte:ElectricRateCaseFiling2018Member dte:MPSCMember 2018-07-06 2018-07-06 0000936340 dte:DTEElectricMember dte:ElectricRateCaseFiling2019Member dte:MPSCMember 2019-07-08 2019-07-08 0000936340 dte:DTEGasMember 2019-08-20 2019-08-20 0000936340 dte:DTEGasMember 2018-11-16 2018-11-16 0000936340 dte:DTEElectricMember dte:DTEMainElectricDepreciationCaseFiling2016Member dte:MPSCMember 2018-12-05 2018-12-05 0000936340 dte:DTEElectricMember dte:ElectricRateCaseFiling2018Member dte:MPSCMember 2019-02-01 2019-02-01 0000936340 dte:DTEElectricMember dte:ElectricRateCaseFiling2018Member dte:MPSCMember 2019-05-02 2019-05-02 0000936340 dte:DTEElectricMember dte:DTEMainElectricDepreciationCaseFiling2016Member dte:MPSCMember 2018-12-06 2018-12-06 0000936340 dte:EquityUnitsSubjecttoMandatoryRedemptionMember us-gaap:SubsequentEventMember 2019-10-01 2019-10-01 0000936340 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel3Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel1Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel1Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel2Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2019-09-30 0000936340 us-gaap:CarryingReportedAmountFairValueDisclosureMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel3Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel2Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-12-31 0000936340 dte:NuclearDecommissioningTrustFundMember us-gaap:FixedIncomeSecuritiesMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember 2018-06-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember 2019-01-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember 2018-01-01 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember 2019-06-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember 2019-07-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember 2017-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember 2018-07-01 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:OtherInvestmentsMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:OtherInvestmentsMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:OtherInvestmentsMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:OtherInvestmentsMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:CashAndCashEquivalentsMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:RestrictedCashMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:CashAndCashEquivalentsMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 srt:MaximumMember dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2019-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 srt:MinimumMember dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2019-09-30 0000936340 srt:WeightedAverageMember dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2019-09-30 0000936340 srt:WeightedAverageMember dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2019-09-30 0000936340 srt:MaximumMember dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2019-09-30 0000936340 srt:MinimumMember dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2019-09-30 0000936340 us-gaap:CashEquivalentsMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:NoncurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:NoncurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:CurrentDerivativeLiabilityMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-09-30 0000936340 dte:NoncurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000936340 dte:NoncurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2018-12-31 0000936340 dte:NoncurrentDerivativeLiabilityMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:CurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:CashEquivalentsMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:CurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:CurrentDerivativeLiabilityMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2019-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:CurrentAssetMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:NoncurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:NoncurrentAssetMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:CurrentAssetMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:CurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:CurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-09-30 0000936340 dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:InterestRateContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:CurrentAssetMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:InterestRateContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:NoncurrentAssetMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:NoncurrentAssetMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:CurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-09-30 0000936340 us-gaap:InterestRateContractMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:InterestRateContractMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:CurrentAssetMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2019-09-30 0000936340 us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2018-12-31 0000936340 us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2019-09-30 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:NoncurrentDerivativeLiabilityMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000936340 dte:CurrentAssetMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:CurrentAssetMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:NoncurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2018-12-31 0000936340 us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2018-12-31 0000936340 us-gaap:InterestRateContractMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:CurrentAssetMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:InterestRateContractMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2019-09-30 0000936340 us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2018-12-31 0000936340 dte:CurrentDerivativeLiabilityMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2018-12-31 0000936340 us-gaap:InterestRateContractMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:NoncurrentAssetMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2019-09-30 0000936340 dte:CurrentAssetMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000936340 us-gaap:InterestRateContractMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 srt:WeightedAverageMember dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2018-12-31 0000936340 srt:MaximumMember dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2018-12-31 0000936340 srt:MaximumMember dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2018-12-31 0000936340 srt:WeightedAverageMember dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2018-12-31 0000936340 srt:MinimumMember dte:NaturalGasCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2018-12-31 0000936340 srt:MinimumMember dte:ElectricityCommodityContractMember us-gaap:FairValueInputsLevel3Member us-gaap:MeasurementInputCommodityForwardPriceMember us-gaap:ValuationTechniqueDiscountedCashFlowMember 2018-12-31 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember 2018-07-01 2018-09-30 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember 2019-01-01 2019-09-30 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember 2019-07-01 2019-09-30 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember 2018-01-01 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember dte:FinancialTransmissionRightsMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2019-09-30 0000936340 dte:DTEElectricMember dte:NoncurrentAssetMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember dte:CurrentAssetMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember dte:NoncurrentAssetMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember dte:FinancialTransmissionRightsMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2019-09-30 0000936340 dte:DTEElectricMember dte:CurrentAssetMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember dte:FinancialTransmissionRightsMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember dte:NoncurrentAssetMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2019-09-30 0000936340 dte:DTEElectricMember dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember dte:CurrentAssetMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember dte:FinancialTransmissionRightsMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember dte:CurrentAssetMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-09-30 0000936340 dte:DTEElectricMember dte:FinancialTransmissionRightsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:CashEquivalentsMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2019-09-30 0000936340 dte:DTEElectricMember dte:FinancialTransmissionRightsMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:EquitySecuritiesMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:CashEquivalentsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember dte:CurrentAssetMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2019-09-30 0000936340 dte:DTEElectricMember dte:NoncurrentAssetMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember dte:FinancialTransmissionRightsMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2019-09-30 0000936340 dte:DTEElectricMember dte:CurrentAssetMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember dte:CurrentAssetMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember dte:NoncurrentAssetMember us-gaap:FairValueInputsLevel3Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:FairValueMeasurementsRecurringMember us-gaap:PrivateEquityFundsMember 2018-12-31 0000936340 dte:DTEElectricMember dte:FinancialTransmissionRightsMember us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember dte:CurrentAssetMember us-gaap:FairValueInputsLevel1Member us-gaap:FairValueMeasurementsRecurringMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:CashEquivalentsMember us-gaap:FairValueMeasurementsRecurringMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueMeasurementsRecurringMember us-gaap:FixedIncomeSecuritiesMember 2018-12-31 0000936340 us-gaap:FairValueMeasurementsRecurringMember 2019-01-01 2019-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-01-01 2019-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-01-01 2019-09-30 0000936340 us-gaap:FairValueMeasurementsRecurringMember 2018-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-01-01 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-01-01 2018-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-01-01 2018-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2017-12-31 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-01-01 2018-09-30 0000936340 us-gaap:FairValueMeasurementsRecurringMember 2018-01-01 2018-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2017-12-31 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2017-12-31 0000936340 us-gaap:FairValueMeasurementsRecurringMember 2017-12-31 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-09-30 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember 2019-09-30 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember 2018-12-31 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember us-gaap:EquitySecuritiesMember 2019-09-30 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember us-gaap:EquitySecuritiesMember 2018-12-31 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember us-gaap:NuclearPlantMember 2018-12-31 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember dte:LowLevelRadioactiveWasteMember 2019-09-30 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember us-gaap:NuclearPlantMember 2019-09-30 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember dte:LowLevelRadioactiveWasteMember 2018-12-31 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember dte:NuclearPlant1Member 2018-12-31 0000936340 dte:DTEElectricMember dte:NuclearDecommissioningTrustFundMember dte:NuclearPlant1Member 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-07-01 2018-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-07-01 2018-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-07-01 2019-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-07-01 2019-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-07-01 2018-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-06-30 0000936340 us-gaap:FairValueMeasurementsRecurringMember 2018-07-01 2018-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-06-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-07-01 2019-09-30 0000936340 us-gaap:FairValueMeasurementsRecurringMember 2019-07-01 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-06-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-06-30 0000936340 dte:OtherCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2018-06-30 0000936340 us-gaap:FairValueMeasurementsRecurringMember 2018-06-30 0000936340 us-gaap:FairValueMeasurementsRecurringMember 2019-06-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:FairValueMeasurementsRecurringMember 2019-06-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:CarryingReportedAmountFairValueDisclosureMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:EstimateOfFairValueFairValueDisclosureMember srt:AffiliatedEntityMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:CarryingReportedAmountFairValueDisclosureMember srt:AffiliatedEntityMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:CarryingReportedAmountFairValueDisclosureMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:CarryingReportedAmountFairValueDisclosureMember srt:AffiliatedEntityMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel3Member us-gaap:EstimateOfFairValueFairValueDisclosureMember srt:AffiliatedEntityMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:EstimateOfFairValueFairValueDisclosureMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:EstimateOfFairValueFairValueDisclosureMember srt:AffiliatedEntityMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:EstimateOfFairValueFairValueDisclosureMember srt:AffiliatedEntityMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel2Member us-gaap:EstimateOfFairValueFairValueDisclosureMember srt:AffiliatedEntityMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:FairValueInputsLevel1Member us-gaap:EstimateOfFairValueFairValueDisclosureMember srt:AffiliatedEntityMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:NondesignatedMember 2019-09-30 0000936340 dte:DTEElectricMember dte:FinancialTransmissionRightsMember us-gaap:NondesignatedMember 2019-09-30 0000936340 dte:DTEElectricMember dte:FinancialTransmissionRightsMember us-gaap:NondesignatedMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:NondesignatedMember 2018-12-31 0000936340 dte:ElectricityCommodityContractMember us-gaap:NondesignatedMember 2019-09-30 0000936340 dte:NoncurrentDerivativeAssetMember 2018-12-31 0000936340 us-gaap:NondesignatedMember 2019-09-30 0000936340 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember 2019-09-30 0000936340 us-gaap:NondesignatedMember 2018-12-31 0000936340 dte:NoncurrentDerivativeAssetMember 2019-09-30 0000936340 dte:CurrentDerivativeAssetMember 2018-12-31 0000936340 dte:OtherCommodityContractMember us-gaap:NondesignatedMember 2019-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:NondesignatedMember 2018-12-31 0000936340 dte:NoncurrentDerivativeLiabilityMember 2018-12-31 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember 2018-12-31 0000936340 dte:ElectricityCommodityContractMember us-gaap:NondesignatedMember 2018-12-31 0000936340 dte:CurrentDerivativeLiabilityMember 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:NondesignatedMember 2018-12-31 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:NondesignatedMember 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:NondesignatedMember 2019-09-30 0000936340 us-gaap:InterestRateContractMember us-gaap:DesignatedAsHedgingInstrumentMember 2018-12-31 0000936340 dte:CurrentDerivativeAssetMember 2019-09-30 0000936340 dte:CurrentDerivativeLiabilityMember 2018-12-31 0000936340 dte:NoncurrentDerivativeLiabilityMember 2019-09-30 0000936340 dte:OtherCommodityContractMember 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember 2018-12-31 0000936340 dte:ElectricityCommodityContractMember 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember 2019-09-30 0000936340 us-gaap:InterestRateContractMember 2019-09-30 0000936340 us-gaap:ForeignExchangeContractMember 2019-09-30 0000936340 dte:ElectricityCommodityContractMember 2018-12-31 0000936340 dte:OtherCommodityContractMember 2018-12-31 0000936340 us-gaap:ForeignExchangeContractMember 2018-12-31 0000936340 us-gaap:InterestRateContractMember 2018-12-31 0000936340 dte:NaturalGasCommodityContractMember us-gaap:SalesMember 2018-01-01 2018-09-30 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:SalesMember 2019-01-01 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:SalesMember 2018-07-01 2018-09-30 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:SalesMember 2019-07-01 2019-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:SalesMember 2019-01-01 2019-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:SalesMember 2019-07-01 2019-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:SalesMember 2018-01-01 2018-09-30 0000936340 dte:NaturalGasCommodityContractMember srt:FuelMember 2019-07-01 2019-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:SalesMember 2018-01-01 2018-09-30 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:SalesMember 2018-07-01 2018-09-30 0000936340 dte:NaturalGasCommodityContractMember srt:FuelMember 2018-01-01 2018-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:SalesMember 2019-07-01 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember srt:FuelMember 2018-07-01 2018-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:SalesMember 2019-07-01 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember srt:FuelMember 2019-01-01 2019-09-30 0000936340 us-gaap:ForeignExchangeContractMember us-gaap:SalesMember 2018-01-01 2018-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:SalesMember 2019-01-01 2019-09-30 0000936340 dte:OtherCommodityContractMember us-gaap:SalesMember 2018-07-01 2018-09-30 0000936340 dte:NaturalGasCommodityContractMember us-gaap:SalesMember 2019-01-01 2019-09-30 0000936340 dte:ElectricityCommodityContractMember us-gaap:SalesMember 2018-07-01 2018-09-30 0000936340 dte:ElectricityCommodityContractMember 2019-01-01 2019-09-30 0000936340 dte:NaturalGasCommodityContractMember 2019-01-01 2019-09-30 0000936340 srt:ParentCompanyMember dte:June20193.40SeniorNotesMaturing2029Member us-gaap:SeniorNotesMember 2019-09-30 0000936340 dte:DTEElectricMember dte:February20193.95MortgageBondsMaturingin2049Member us-gaap:MortgagesMember 2019-09-30 0000936340 srt:ParentCompanyMember dte:June20192.60SeniorNotesMaturing2022Member us-gaap:SeniorNotesMember 2019-09-30 0000936340 dte:DTEGasMember dte:October20192.95FirstMortgageBondsMaturing2029Member us-gaap:MortgagesMember us-gaap:SubsequentEventMember 2019-10-31 0000936340 dte:DTEGasMember dte:SeriesE20045.0SeniorNotesMaturing2019Member us-gaap:SeniorNotesMember us-gaap:SubsequentEventMember 2019-10-31 0000936340 dte:DTEGasMember dte:October20193.72FirstMortgageBondsMaturing2049Member us-gaap:MortgagesMember us-gaap:SubsequentEventMember 2019-10-31 0000936340 dte:DTEGasMember dte:SeriesE20045.0SeniorNotesMaturing2019Member us-gaap:SeniorNotesMember us-gaap:SubsequentEventMember 2019-10-01 2019-10-31 0000936340 dte:SeriesC1.5RSNsDue2024Member us-gaap:SeniorNotesMember 2019-08-31 0000936340 srt:ParentCompanyMember dte:SeriesD20161.5SeniorNotesMaturing2019Member us-gaap:SeniorNotesMember us-gaap:SubsequentEventMember 2019-10-01 2019-10-31 0000936340 dte:SeriesC2.529RSNsDue2024Member us-gaap:SeniorNotesMember us-gaap:SubsequentEventMember 2019-10-01 0000936340 srt:ParentCompanyMember dte:SeriesD20161.5SeniorNotesMaturing2019Member us-gaap:SeniorNotesMember us-gaap:SubsequentEventMember 2019-10-31 0000936340 srt:ParentCompanyMember dte:DemandFinancingAgreementMember 2019-09-30 0000936340 srt:ParentCompanyMember dte:DemandFinancingAgreementPlusLetterofCreditMember 2019-09-30 0000936340 srt:ParentCompanyMember us-gaap:LetterOfCreditMember dte:OtheroutstandinglettersofcreditMember 2019-09-30 0000936340 srt:ParentCompanyMember dte:DemandFinancingAgreementMember 2018-12-31 0000936340 srt:ParentCompanyMember us-gaap:LetterOfCreditMember dte:UnsecuredLetterOfCreditFacilityExpiringInAugust2021Member 2019-08-31 0000936340 srt:MaximumMember 2019-09-30 0000936340 srt:ParentCompanyMember us-gaap:LetterOfCreditMember dte:UnsecuredLetterOfCreditFacilityExpiringInSeptember2019Member 2019-07-31 0000936340 srt:ParentCompanyMember 2019-09-30 0000936340 dte:DTEGasMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:RevolvingCreditFacilityMember dte:UnsecuredRevolvingCreditFacilityExpiringApril2024Member 2019-09-30 0000936340 srt:ParentCompanyMember us-gaap:LetterOfCreditMember dte:UnsecuredLetterOfCreditFacilityExpiringInFebruary2021Member 2019-09-30 0000936340 srt:ParentCompanyMember us-gaap:LetterOfCreditMember 2019-09-30 0000936340 us-gaap:RevolvingCreditFacilityMember dte:UnsecuredRevolvingCreditFacilityExpiringApril2024Member 2019-09-30 0000936340 us-gaap:LetterOfCreditMember 2019-09-30 0000936340 dte:DTEGasMember us-gaap:LetterOfCreditMember dte:UnsecuredLetterOfCreditFacilityExpiringInAugust2021Member 2019-09-30 0000936340 us-gaap:CommercialPaperMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:LetterOfCreditMember 2019-09-30 0000936340 srt:ParentCompanyMember us-gaap:CommercialPaperMember 2019-09-30 0000936340 us-gaap:LetterOfCreditMember dte:UnsecuredLetterOfCreditFacilityExpiringInAugust2021Member 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:CommercialPaperMember 2019-09-30 0000936340 dte:DTEGasMember us-gaap:LetterOfCreditMember dte:UnsecuredLetterOfCreditFacilityExpiringInFebruary2021Member 2019-09-30 0000936340 us-gaap:LetterOfCreditMember dte:UnsecuredLetterOfCreditFacilityExpiringInFebruary2021Member 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:LetterOfCreditMember dte:UnsecuredLetterOfCreditFacilityExpiringInFebruary2021Member 2019-09-30 0000936340 dte:DTEGasMember us-gaap:CommercialPaperMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:LetterOfCreditMember dte:UnsecuredLetterOfCreditFacilityExpiringInAugust2021Member 2019-09-30 0000936340 dte:DTEGasMember us-gaap:RevolvingCreditFacilityMember dte:UnsecuredRevolvingCreditFacilityExpiringApril2024Member 2019-09-30 0000936340 srt:ParentCompanyMember us-gaap:RevolvingCreditFacilityMember dte:UnsecuredRevolvingCreditFacilityExpiringApril2024Member 2019-09-30 0000936340 dte:DTEGasMember us-gaap:LetterOfCreditMember 2019-09-30 0000936340 srt:ParentCompanyMember us-gaap:LetterOfCreditMember dte:UnsecuredLetterOfCreditFacilityExpiringInAugust2021Member 2019-09-30 0000936340 2016-01-01 2016-12-31 0000936340 2017-01-01 2017-12-31 0000936340 srt:MinimumMember 2019-01-01 2019-09-30 0000936340 dte:PipelineSystemLeaseMember 2018-12-31 0000936340 srt:MinimumMember 2019-09-30 0000936340 srt:MaximumMember 2019-01-01 2019-09-30 0000936340 dte:DTEElectricMember srt:MaximumMember 2019-01-01 2019-09-30 0000936340 dte:DTEElectricMember srt:MinimumMember 2019-01-01 2019-09-30 0000936340 dte:PipelineSystemLeaseMember 2018-01-01 2018-12-31 0000936340 us-gaap:AssetsLeasedToOthersMember 2019-09-30 0000936340 dte:DTEGasMember dte:PartialClosureCompleteMember 2019-01-01 2019-09-30 0000936340 dte:VectorMember us-gaap:UnfundedLoanCommitmentMember 2019-09-30 0000936340 dte:VectorMember dte:NEXUSPipelineMember 2019-09-30 0000936340 dte:NEXUSMember dte:VectorMember dte:NEXUSPipelineMember 2019-01-01 2019-09-30 0000936340 dte:PacificGasandElectricCorporationMember dte:PowerAndIndustrialProjectsMember 2019-09-30 0000936340 dte:DTEGasMember dte:CleanUpCompletedandSiteClosedMember 2019-01-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsMember us-gaap:LaborForceConcentrationRiskMember 2019-09-30 0000936340 dte:DTEGasMember 2019-01-01 2019-09-30 0000936340 dte:ReductionofCarbonEmissionsby2030Member 2019-01-01 2019-09-30 0000936340 dte:DTEGasMember dte:DTEGasMember dte:NEXUSPipelineMember 2019-01-01 2019-09-30 0000936340 dte:VectorMember dte:NEXUSPipelineMember 2019-01-01 2019-09-30 0000936340 dte:SyntheticFuelMember 2019-09-30 0000936340 dte:TexasEasternTransmissionLPMember dte:NEXUSPipelineMember 2019-09-30 0000936340 dte:DTEGasMember dte:NEXUSPipelineMember 2019-09-30 0000936340 dte:ReductionofCarbonEmissionsbyEarly2020sMember 2019-01-01 2019-09-30 0000936340 dte:DTEElectricMember 2009-07-31 0000936340 dte:PacificGasandElectricCorporationMember dte:PowerAndIndustrialProjectsMember 2018-01-01 2018-12-31 0000936340 dte:SyntheticFuelMember 2019-01-01 2019-09-30 0000936340 us-gaap:GuaranteeTypeOtherMember 2019-09-30 0000936340 dte:DTEGasMember dte:NEXUSPipelineMember 2019-01-01 2019-09-30 0000936340 dte:DTEElectricMember dte:ReductionofCarbonEmissionsby2050Member 2019-01-01 2019-09-30 0000936340 dte:ReducedEmissionsFuelGuaranteesMember 2019-09-30 0000936340 dte:ReductionofCarbonEmissionsby2040Member 2019-01-01 2019-09-30 0000936340 dte:VectorMember us-gaap:UnfundedLoanCommitmentMember 2019-07-31 0000936340 us-gaap:WorkforceSubjectToCollectiveBargainingArrangementsMember us-gaap:LaborForceConcentrationRiskMember 2019-09-30 0000936340 dte:NEXUSMember dte:DTEGasMember dte:NEXUSPipelineMember 2019-01-01 2019-09-30 0000936340 dte:ReducedEmissionsFuelGuaranteesMember 2019-01-01 2019-09-30 0000936340 us-gaap:SuretyBondMember 2019-09-30 0000936340 dte:TexasEasternTransmissionLPMember dte:NEXUSPipelineMember 2019-01-01 2019-09-30 0000936340 dte:NEXUSMember dte:TexasEasternTransmissionLPMember dte:NEXUSPipelineMember 2019-01-01 2019-09-30 0000936340 dte:DTEGasMember 2018-12-31 0000936340 dte:DTEElectricMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-01-01 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-01-01 2019-09-30 0000936340 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-07-01 2019-09-30 0000936340 us-gaap:PensionPlansDefinedBenefitMember 2019-07-01 2019-09-30 0000936340 us-gaap:PensionPlansDefinedBenefitMember 2018-07-01 2018-09-30 0000936340 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-07-01 2018-09-30 0000936340 us-gaap:PensionPlansDefinedBenefitMember 2019-01-01 2019-09-30 0000936340 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-01-01 2018-09-30 0000936340 us-gaap:PensionPlansDefinedBenefitMember 2018-01-01 2018-09-30 0000936340 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-01-01 2019-09-30 0000936340 us-gaap:PensionPlansDefinedBenefitMember 2019-03-05 2019-03-05 0000936340 us-gaap:PensionPlansDefinedBenefitMember 2019-03-05 0000936340 dte:DTEElectricMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-07-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2018-07-01 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:PensionPlansDefinedBenefitMember 2018-07-01 2018-09-30 0000936340 dte:DTEElectricMember us-gaap:PensionPlansDefinedBenefitMember 2019-07-01 2019-09-30 0000936340 us-gaap:PensionPlansDefinedBenefitMember 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:PensionPlansDefinedBenefitMember 2019-01-01 2019-09-30 0000936340 dte:DTEElectricMember us-gaap:PensionPlansDefinedBenefitMember 2019-03-01 2019-03-31 0000936340 dte:DTEElectricMember us-gaap:PensionPlansDefinedBenefitMember 2018-01-01 2018-09-30 0000936340 us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember 2019-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:ElectricMember 2019-07-01 2019-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:EnergyTradingMember 2018-01-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:GasStorageAndPipelinesMember 2019-07-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember 2018-01-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:GasMember 2019-01-01 2019-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:GasMember 2018-01-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:GasStorageAndPipelinesMember 2019-01-01 2019-09-30 0000936340 us-gaap:OperatingSegmentsMember us-gaap:CorporateAndOtherMember 2018-01-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:GasStorageAndPipelinesMember 2018-01-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:PowerAndIndustrialProjectsMember 2018-07-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:GasStorageAndPipelinesMember 2018-07-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember us-gaap:CorporateAndOtherMember 2019-01-01 2019-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:PowerAndIndustrialProjectsMember 2019-07-01 2019-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:PowerAndIndustrialProjectsMember 2018-01-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:GasMember 2018-07-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:PowerAndIndustrialProjectsMember 2019-01-01 2019-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:EnergyTradingMember 2019-07-01 2019-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:ElectricMember 2018-01-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember us-gaap:CorporateAndOtherMember 2018-07-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember us-gaap:CorporateAndOtherMember 2019-07-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember 2019-01-01 2019-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:GasMember 2019-07-01 2019-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:ElectricMember 2019-01-01 2019-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:EnergyTradingMember 2019-01-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember 2019-07-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember 2018-07-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:ElectricMember 2018-07-01 2018-09-30 0000936340 us-gaap:OperatingSegmentsMember dte:EnergyTradingMember 2018-07-01 2018-09-30 0000936340 us-gaap:CorporateAndOtherMember 2018-01-01 2018-09-30 0000936340 us-gaap:CorporateAndOtherMember 2018-07-01 2018-09-30 0000936340 us-gaap:CorporateAndOtherMember 2019-07-01 2019-09-30 0000936340 us-gaap:CorporateAndOtherMember 2019-01-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:PowerAndIndustrialProjectsMember 2018-07-01 2018-09-30 0000936340 us-gaap:IntersegmentEliminationMember us-gaap:CorporateAndOtherMember 2019-07-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:GasStorageAndPipelinesMember 2019-07-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:ElectricMember 2019-07-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:ElectricMember 2018-07-01 2018-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:GasStorageAndPipelinesMember 2018-01-01 2018-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:PowerAndIndustrialProjectsMember 2019-07-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:ElectricMember 2019-01-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:GasStorageAndPipelinesMember 2019-01-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:PowerAndIndustrialProjectsMember 2018-01-01 2018-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:GasMember 2019-07-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember us-gaap:CorporateAndOtherMember 2019-01-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:EnergyTradingMember 2019-01-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:GasStorageAndPipelinesMember 2018-07-01 2018-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:EnergyTradingMember 2018-01-01 2018-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:EnergyTradingMember 2018-07-01 2018-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:EnergyTradingMember 2019-07-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember us-gaap:CorporateAndOtherMember 2018-01-01 2018-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:GasMember 2018-07-01 2018-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:GasMember 2018-01-01 2018-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:PowerAndIndustrialProjectsMember 2019-01-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember us-gaap:CorporateAndOtherMember 2018-07-01 2018-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:GasMember 2019-01-01 2019-09-30 0000936340 us-gaap:IntersegmentEliminationMember dte:ElectricMember 2018-01-01 2018-09-30 0000936340 srt:ScenarioForecastMember dte:M5LouisianaGatheringLLCMember us-gaap:SubsequentEventMember 2020-07-01 2020-12-31 0000936340 srt:ScenarioForecastMember dte:M5LouisianaGatheringLLCMember us-gaap:SubsequentEventMember 2019-12-01 2019-12-31 0000936340 srt:ScenarioForecastMember dte:M5LouisianaGatheringLLCMember us-gaap:SubsequentEventMember 2019-12-01 2020-12-31 0000936340 srt:ScenarioForecastMember dte:M5LouisianaGatheringLLCMember us-gaap:SubsequentEventMember 2019-12-31 xbrli:shares iso4217:USD xbrli:shares iso4217:USD xbrli:pure utreg:MW dte:customer iso4217:USD utreg:MWh iso4217:USD utreg:MMBTU utreg:MMBTU iso4217:CAD utreg:MWh dte:agreement dte:plant dte:site dte:employee dte:facility dte:NOV

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(b) of the Act:

Title of Each Class		Trading Symbol(s)		Name of Exchange on which Registered
Common stock, without par value		DTE		New York Stock Exchange
2012 Series C 5.25% Junior Subordinated Debentures due 2062		DTQ		New York Stock Exchange
2016 Series B 5.375% Junior Subordinated Debentures due 2076		DTJ		New York Stock Exchange
2016 Series F 6.00% Junior Subordinated Debentures due 2076		DTY		New York Stock Exchange
2017 Series E 5.25% Junior Subordinated Debentures due 2077		DTW		New York Stock Exchange

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.

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).

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 is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Number of shares of Common Stock outstanding at September 30, 2019:

This combined Form 10-Q 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 H(1)(a) and (b) of Form 10-Q and is therefore filing this form with the reduced disclosure format specified in General Instructions H(2) of Form 10-Q.

This combined Form 10-Q is separately filed by DTE Energy and DTE Electric. Information in this combined Form 10-Q 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 in respect to debt securities of DTE Energy. This combined Form 10-Q should be read in its entirety. No one section of this combined Form 10-Q deals with all aspects of the subject matter of this combined Form 10-Q. This combined Form 10-Q should be read in conjunction with the Consolidated Financial Statements and Combined Notes to Consolidated Financial Statements and with Management's Discussion and Analysis included in the combined DTE Energy and DTE Electric 2018 Annual Report on 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:

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.