Companies: 11,396     total market cap: A$215.488 T
$USD๐Ÿ‡บ๐Ÿ‡ธโ‚ฌEUR๐Ÿ‡ช๐Ÿ‡บโ‚นINR๐Ÿ‡ฎ๐Ÿ‡ณยฃGBP๐Ÿ‡ฌ๐Ÿ‡ง$CAD๐Ÿ‡จ๐Ÿ‡ฆ$NZD๐Ÿ‡ณ๐Ÿ‡ฟ$HKD๐Ÿ‡ญ๐Ÿ‡ฐ$SGD๐Ÿ‡ธ๐Ÿ‡ฌ
TC Energy
TRP
#385
Rank
A$93.09 B
Marketcap
๐Ÿ‡จ๐Ÿ‡ฆ Canada
Country
A$89.36
Share price
-1.29%
Change (1 day)
16.40%
Change (1 year)
๐Ÿ›ข Oil&Gas๐Ÿšš Transportation โšก Energy๐Ÿ›ฃ๏ธ Infrastructure
Categories
  1. TC Energy
  2. Annual Reports (40-F)
  3. Submitted on 2020-02-13

TC Energy - 40-F annual report


Text size:
falsefalse--12-31--12-31FYFY201920192019-12-3140-F000123238400000990700P10YP10YP10YP10YP10YP3YP5YP9YP5YP6Y0.02P12YP5YP90D0.040.020.02P3Y918000000938000000918000000938000000067200000022500000002500000003500000024000000050000000200000000330000001900000012000000005000000004000000040000000017192000000240000006720000002250000000250000000021900000050000000200000000330000003900000012000000004500000000400000000147920000002300000015000000001000000000750000000110000000015000000001200000000232000000003170000000025700000000334000000000.04900.06350.058750.05750.05550.06125227000000003100000000022600000000293000000000.0630.450.70.150.250.40.050082000000590000000000P1Y2500000044800000020500000000P10YP1YP1YP47YP1YP11YP1Yone to three yearsP1YP1Y0.33330.33340.333300012323842019-01-012019-12-310001232384trp:TransCanadaPipeLinesLimitedMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMember2019-01-012019-12-310001232384dei:BusinessContactMember2019-01-012019-12-3100012323842019-12-3100012323842018-01-012018-12-310001232384trp:PowerandStorageSegmentMember2017-01-012017-12-310001232384trp:CanadianNaturalGasPipelinesMember2018-01-012018-12-310001232384trp:LiquidsPipelinesSegmentMember2018-01-012018-12-3100012323842017-01-012017-12-310001232384trp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384trp:MexicoNaturalGasPipelinesMember2018-01-012018-12-310001232384trp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384trp:LiquidsPipelinesSegmentMember2017-01-012017-12-310001232384trp:MexicoNaturalGasPipelinesMember2017-01-012017-12-310001232384trp:MexicoNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:CanadianNaturalGasPipelinesMember2017-01-012017-12-310001232384trp:U.S.NaturalGasPipelinesMember2017-01-012017-12-310001232384trp:CanadianNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:U.S.NaturalGasPipelinesMember2018-01-012018-12-310001232384trp:PowerandStorageSegmentMember2019-01-012019-12-310001232384trp:PowerandStorageSegmentMember2018-01-012018-12-3100012323842017-12-3100012323842018-12-3100012323842016-12-310001232384us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-01-012018-12-310001232384us-gaap:NoncontrollingInterestMember2019-01-012019-12-310001232384us-gaap:NoncontrollingInterestMember2017-01-012017-12-310001232384us-gaap:RetainedEarningsMember2018-01-012018-12-310001232384us-gaap:AccumulatedOtherComprehensiveIncomeMember2017-01-012017-12-310001232384us-gaap:CommonStockMember2017-01-012017-12-310001232384us-gaap:PreferredStockMember2019-12-310001232384us-gaap:ParentMember2018-12-310001232384us-gaap:ParentMember2017-12-310001232384us-gaap:CommonStockMember2019-01-012019-12-310001232384us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-01-012019-12-310001232384us-gaap:NoncontrollingInterestMember2017-12-310001232384us-gaap:RetainedEarningsMember2016-12-310001232384us-gaap:NoncontrollingInterestMember2018-01-012018-12-310001232384us-gaap:NoncontrollingInterestMember2018-12-310001232384us-gaap:RetainedEarningsMember2017-01-012017-12-310001232384us-gaap:PreferredStockMember2017-12-310001232384us-gaap:RetainedEarningsMember2019-01-012019-12-310001232384us-gaap:CommonStockMember2017-12-310001232384us-gaap:ParentMember2019-12-310001232384us-gaap:AdditionalPaidInCapitalMember2017-01-012017-12-310001232384us-gaap:RetainedEarningsMember2017-12-310001232384us-gaap:AccumulatedOtherComprehensiveIncomeMember2017-12-310001232384us-gaap:RetainedEarningsMember2018-12-310001232384us-gaap:AdditionalPaidInCapitalMember2018-12-310001232384us-gaap:AccumulatedOtherComprehensiveIncomeMember2018-12-310001232384us-gaap:PreferredStockMember2018-12-310001232384us-gaap:CommonStockMember2018-01-012018-12-310001232384us-gaap:RetainedEarningsMember2019-12-310001232384us-gaap:AdditionalPaidInCapitalMember2019-12-310001232384us-gaap:CommonStockMember2018-12-310001232384us-gaap:NoncontrollingInterestMember2019-12-310001232384us-gaap:AdditionalPaidInCapitalMember2019-01-012019-12-310001232384us-gaap:AccumulatedOtherComprehensiveIncomeMember2019-12-310001232384us-gaap:CommonStockMember2016-12-310001232384us-gaap:AccumulatedOtherComprehensiveIncomeMember2016-12-310001232384us-gaap:NoncontrollingInterestMember2016-12-310001232384us-gaap:AdditionalPaidInCapitalMember2018-01-012018-12-310001232384us-gaap:CommonStockMember2019-12-310001232384trp:MexicoNaturalGasPipelinesMember2019-12-310001232384trp:U.S.NaturalGasPipelinesMember2019-12-310001232384trp:LiquidsPipelinesSegmentMember2019-12-310001232384trp:PowerandStorageSegmentMember2019-12-310001232384trp:CanadianNaturalGasPipelinesMember2019-12-310001232384srt:MaximumMemberus-gaap:PipelinesMembertrp:MidstreamMember2019-01-012019-12-310001232384srt:MinimumMemberus-gaap:PipelinesMembertrp:MidstreamMember2019-01-012019-12-310001232384srt:MinimumMemberus-gaap:PipelinesMembertrp:NaturalGasPipelinesSegmentMember2019-01-012019-12-310001232384us-gaap:CorporateNonSegmentMembersrt:MaximumMember2019-01-012019-12-310001232384srt:MaximumMemberus-gaap:EnergyEquipmentMembertrp:PowerandStorageSegmentMember2019-01-012019-12-310001232384srt:MaximumMemberus-gaap:PipelinesMembertrp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384srt:MaximumMemberus-gaap:PipelinesMembertrp:NaturalGasPipelinesSegmentMember2019-01-012019-12-310001232384srt:MinimumMemberus-gaap:EnergyEquipmentMembertrp:PowerandStorageSegmentMember2019-01-012019-12-310001232384srt:MinimumMemberus-gaap:PipelinesMembertrp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384us-gaap:CorporateNonSegmentMembersrt:MinimumMember2019-01-012019-12-310001232384us-gaap:OperatingSegmentsMembertrp:PowerandStorageSegmentMember2017-01-012017-12-310001232384us-gaap:OperatingSegmentsMembertrp:U.S.NaturalGasPipelinesMember2017-01-012017-12-310001232384us-gaap:OperatingSegmentsMembertrp:MexicoNaturalGasPipelinesMember2017-01-012017-12-310001232384us-gaap:OperatingSegmentsMembertrp:LiquidsPipelinesSegmentMember2017-01-012017-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianNaturalGasPipelinesMember2017-01-012017-12-310001232384us-gaap:CorporateNonSegmentMember2017-01-012017-12-310001232384us-gaap:IntersegmentEliminationMembertrp:LiquidsPipelinesSegmentMember2017-01-012017-12-310001232384us-gaap:IntersegmentEliminationMembertrp:CanadianNaturalGasPipelinesMember2017-01-012017-12-310001232384us-gaap:IntersegmentEliminationMembertrp:MexicoNaturalGasPipelinesMember2017-01-012017-12-310001232384us-gaap:IntersegmentEliminationMembertrp:U.S.NaturalGasPipelinesMember2017-01-012017-12-310001232384us-gaap:IntersegmentEliminationMembertrp:PowerandStorageSegmentMember2017-01-012017-12-310001232384us-gaap:OperatingSegmentsMembertrp:LiquidsPipelinesSegmentMember2018-01-012018-12-310001232384us-gaap:OperatingSegmentsMembertrp:U.S.NaturalGasPipelinesMember2018-01-012018-12-310001232384us-gaap:IntersegmentEliminationMembertrp:CanadianNaturalGasPipelinesMember2018-01-012018-12-310001232384us-gaap:OperatingSegmentsMembertrp:MexicoNaturalGasPipelinesMember2018-01-012018-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianNaturalGasPipelinesMember2018-01-012018-12-310001232384us-gaap:CorporateNonSegmentMember2018-01-012018-12-310001232384us-gaap:OperatingSegmentsMembertrp:PowerandStorageSegmentMember2018-01-012018-12-310001232384us-gaap:IntersegmentEliminationMembertrp:PowerandStorageSegmentMember2018-01-012018-12-310001232384us-gaap:IntersegmentEliminationMembertrp:U.S.NaturalGasPipelinesMember2018-01-012018-12-310001232384us-gaap:IntersegmentEliminationMembertrp:LiquidsPipelinesSegmentMember2018-01-012018-12-310001232384us-gaap:IntersegmentEliminationMembertrp:MexicoNaturalGasPipelinesMember2018-01-012018-12-310001232384us-gaap:OperatingSegmentsMembertrp:MexicoNaturalGasPipelinesMember2019-01-012019-12-310001232384us-gaap:OperatingSegmentsMembertrp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384us-gaap:IntersegmentEliminationMembertrp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384us-gaap:OperatingSegmentsMembertrp:PowerandStorageSegmentMember2019-01-012019-12-310001232384us-gaap:OperatingSegmentsMembertrp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384us-gaap:CorporateNonSegmentMember2019-01-012019-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianNaturalGasPipelinesMember2019-01-012019-12-310001232384us-gaap:IntersegmentEliminationMembertrp:CanadianNaturalGasPipelinesMember2019-01-012019-12-310001232384us-gaap:IntersegmentEliminationMembertrp:PowerandStorageSegmentMember2019-01-012019-12-310001232384us-gaap:IntersegmentEliminationMembertrp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384us-gaap:IntersegmentEliminationMembertrp:MexicoNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:MexicoandInternationalMember2017-01-012017-12-310001232384trp:CanadaExportMember2017-01-012017-12-310001232384trp:MexicoandInternationalMember2019-01-012019-12-310001232384trp:CanadaDomesticMember2018-01-012018-12-310001232384country:US2017-01-012017-12-310001232384trp:CanadaDomesticMember2017-01-012017-12-310001232384trp:CanadaDomesticMember2019-01-012019-12-310001232384trp:MexicoandInternationalMember2018-01-012018-12-310001232384country:US2018-01-012018-12-310001232384country:US2019-01-012019-12-310001232384trp:CanadaExportMember2018-01-012018-12-310001232384trp:CanadaExportMember2019-01-012019-12-310001232384country:CA2018-12-310001232384trp:MexicoandInternationalMember2018-12-310001232384country:US2018-12-310001232384country:US2019-12-310001232384country:CA2019-12-310001232384trp:MexicoandInternationalMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:CorporateNonSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:MexicoNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:MexicoNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:PowerandStorageSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:PowerandStorageSegmentMember2018-12-310001232384us-gaap:CorporateNonSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384trp:NaturalGasStorageAndOtherMembertrp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384trp:PowerGenerationMembertrp:PowerandStorageSegmentMember2019-01-012019-12-310001232384trp:CapacityArrangementsAndTransportationMembertrp:CanadianNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:CapacityArrangementsAndTransportationMembertrp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384trp:PowerGenerationMembertrp:MexicoNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:CapacityArrangementsAndTransportationMember2019-01-012019-12-310001232384trp:NaturalGasStorageAndOtherMembertrp:CanadianNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:CapacityArrangementsAndTransportationMembertrp:PowerandStorageSegmentMember2019-01-012019-12-310001232384trp:CapacityArrangementsAndTransportationMembertrp:MexicoNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:PowerGenerationMembertrp:CanadianNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:CapacityArrangementsAndTransportationMembertrp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384trp:NaturalGasStorageAndOtherMembertrp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384trp:NaturalGasStorageAndOtherMember2019-01-012019-12-310001232384trp:NaturalGasStorageAndOtherMembertrp:PowerandStorageSegmentMember2019-01-012019-12-310001232384trp:PowerGenerationMembertrp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384trp:PowerGenerationMember2019-01-012019-12-310001232384trp:NaturalGasStorageAndOtherMembertrp:MexicoNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:PowerGenerationMembertrp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384trp:CapacityArrangementsAndTransportationMembertrp:CanadianNaturalGasPipelinesMember2018-01-012018-12-310001232384trp:CapacityArrangementsAndTransportationMember2018-01-012018-12-310001232384trp:NaturalGasStorageAndOtherMembertrp:U.S.NaturalGasPipelinesMember2018-01-012018-12-310001232384trp:PowerGenerationMembertrp:LiquidsPipelinesSegmentMember2018-01-012018-12-310001232384trp:PowerGenerationMembertrp:CanadianNaturalGasPipelinesMember2018-01-012018-12-310001232384trp:CapacityArrangementsAndTransportationMembertrp:MexicoNaturalGasPipelinesMember2018-01-012018-12-310001232384trp:PowerGenerationMembertrp:PowerandStorageSegmentMember2018-01-012018-12-310001232384trp:NaturalGasStorageAndOtherMembertrp:LiquidsPipelinesSegmentMember2018-01-012018-12-310001232384trp:NaturalGasStorageAndOtherMembertrp:PowerandStorageSegmentMember2018-01-012018-12-310001232384trp:NaturalGasStorageAndOtherMembertrp:CanadianNaturalGasPipelinesMember2018-01-012018-12-310001232384trp:CapacityArrangementsAndTransportationMembertrp:LiquidsPipelinesSegmentMember2018-01-012018-12-310001232384trp:PowerGenerationMember2018-01-012018-12-310001232384trp:CapacityArrangementsAndTransportationMembertrp:U.S.NaturalGasPipelinesMember2018-01-012018-12-310001232384trp:PowerGenerationMembertrp:MexicoNaturalGasPipelinesMember2018-01-012018-12-310001232384trp:CapacityArrangementsAndTransportationMembertrp:PowerandStorageSegmentMember2018-01-012018-12-310001232384trp:NaturalGasStorageAndOtherMember2018-01-012018-12-310001232384trp:PowerGenerationMembertrp:U.S.NaturalGasPipelinesMember2018-01-012018-12-310001232384trp:NaturalGasStorageAndOtherMembertrp:MexicoNaturalGasPipelinesMember2018-01-012018-12-310001232384trp:CapacityArrangementsAndTransportationLongTermContractsMember2019-12-310001232384trp:NaturalGasStorageAndOtherMember2020-01-012019-12-310001232384trp:CapacityArrangementsAndTransportationLongTermContractsMember2020-01-012019-12-310001232384trp:NaturalGasStorageAndOtherMember2019-12-310001232384trp:CapacityArrangementsAndTransportationRateRegulatedContractsMember2019-01-012019-12-310001232384us-gaap:DisposalGroupNotDiscontinuedOperationsMembertrp:PortlandsEnergyMember2019-07-302019-07-300001232384srt:ScenarioForecastMemberus-gaap:DisposalGroupNotDiscontinuedOperationsMembertrp:PortlandsEnergyMember2020-01-012020-12-310001232384us-gaap:DisposalGroupNotDiscontinuedOperationsMembertrp:PortlandsEnergyMember2019-01-012019-12-310001232384us-gaap:DisposalGroupNotDiscontinuedOperationsMembertrp:PortlandsEnergyMember2019-07-300001232384us-gaap:DisposalGroupNotDiscontinuedOperationsMembertrp:PortlandsEnergyMembertrp:PowerandStorageSegmentMember2019-12-310001232384trp:NorthernCourierMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384trp:PowerDevelopmentProjectMember2017-12-312017-12-310001232384trp:BisonPipelineLLCMember2018-12-312018-12-310001232384trp:A20FirstNationsMembertrp:CoastalGasLinkPipelineProjectMemberus-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember2019-01-012019-12-310001232384trp:EnergyEastEasternMainlineandUplandProjectsMember2017-10-052017-10-050001232384trp:KKRandAIMCoMembertrp:CoastalGasLinkPipelineProjectMemberus-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember2019-12-012019-12-310001232384trp:TCPipeLinesLPMember2019-12-310001232384us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMembertrp:NorthernCourierMember2019-07-172019-07-170001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:NaturalGasPipelinesOtherMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:GTNMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMemberus-gaap:AssetUnderConstructionMembertrp:PowerandStorageSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:NaturalGasStorageEquipmentMembertrp:PowerandStorageSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMemberus-gaap:PipelinesMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:OtherNaturalGasPipelinesMemberus-gaap:AssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembersrt:NaturalGasReservesMembertrp:PowerandStorageSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembersrt:NaturalGasReservesMembertrp:PowerandStorageSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMembertrp:MeteringAndOtherMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMemberus-gaap:PipelinesMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMemberus-gaap:AssetUnderConstructionMembertrp:PowerandStorageSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:OtherNaturalGasPipelinesMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMembertrp:CompressionMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMemberus-gaap:PipelinesMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMembertrp:CompressionMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMembertrp:CompressionMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:OtherNaturalGasPipelinesMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMembertrp:CompressionMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMemberus-gaap:PipelinesMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:NaturalGasPipelinesOtherMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMembertrp:TanksAndOtherMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMemberus-gaap:AssetUnderConstructionMembertrp:MexicoNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:OtherNaturalGasPipelinesMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:NaturalGasStorageEquipmentMembertrp:PowerandStorageSegmentMember2018-12-310001232384trp:NGTLSystemMemberus-gaap:AssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMemberus-gaap:AssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMemberus-gaap:AssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:MidstreamMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMemberus-gaap:AssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:OtherNaturalGasPipelinesMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:PowerandStorageSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:OtherNaturalGasPipelinesMemberus-gaap:AssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:CompressionMembertrp:MexicoNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMembertrp:MeteringAndOtherMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:MexicoNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMembertrp:CompressionMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMemberus-gaap:AssetUnderConstructionMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:PowerandStorageSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMembertrp:MeteringAndOtherMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMemberus-gaap:PipelinesMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:GreatLakesMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMembertrp:PumpingEquipmentMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMembertrp:MeteringAndOtherMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:GTNMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGulfTransmissionMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMembertrp:CompressionMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:MeteringAndOtherMembertrp:MexicoNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:MidstreamMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:OtherNaturalGasPipelinesMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMembertrp:MeteringAndOtherMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMembertrp:PumpingEquipmentMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMemberus-gaap:PipelinesMembertrp:MexicoNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMemberus-gaap:PipelinesMembertrp:MexicoNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:MeteringAndOtherMembertrp:MexicoNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGulfTransmissionMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMembertrp:MeteringAndOtherMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:GreatLakesMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:MexicoNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMemberus-gaap:AssetUnderConstructionMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMemberus-gaap:PipelinesMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMembertrp:TanksAndOtherMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMembertrp:MeteringAndOtherMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMembertrp:TanksAndOtherMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:OtherNaturalGasPipelinesMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMembertrp:CompressionMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMembertrp:PumpingEquipmentMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:OtherNaturalGasPipelinesMemberus-gaap:AssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:CompressionMembertrp:MexicoNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:NaturalGasPipelinesOtherMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMemberus-gaap:AssetUnderConstructionMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMemberus-gaap:AssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:NaturalGasPipelinesOtherMemberus-gaap:PipelinesMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:CanadianMainlineMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:IntraAlbertaPipelinesMembertrp:TanksAndOtherMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMemberus-gaap:AssetUnderConstructionMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMembertrp:PumpingEquipmentMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMemberus-gaap:AssetUnderConstructionMembertrp:MexicoNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMemberus-gaap:AssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMemberus-gaap:PipelinesMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:OtherNaturalGasPipelinesMemberus-gaap:AssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMemberus-gaap:AssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384trp:NGTLSystemMemberus-gaap:AssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMembertrp:MeteringAndOtherMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ColumbiaGasTransmissionMembertrp:CompressionMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMemberus-gaap:PipelinesMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:KeystoneMembertrp:PropertyPlantAndEquipmentExcludingAssetUnderConstructionMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384us-gaap:OperatingSegmentsMemberus-gaap:AssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMembertrp:ANRMemberus-gaap:AssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OperatingSegmentsMembertrp:NGTLSystemMemberus-gaap:AssetUnderConstructionMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384us-gaap:OperatingSegmentsMemberus-gaap:AssetUnderConstructionMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMember2019-12-310001232384us-gaap:AccountingStandardsUpdate201602Member2019-01-0100012323842019-01-010001232384us-gaap:AssetsLeasedToOthersMember2019-12-310001232384srt:MaximumMember2019-12-310001232384srt:MinimumMember2019-12-310001232384trp:IroquoisGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384trp:SurdeTexasTransmissionSystemMember2019-01-012019-12-310001232384trp:TransGasdeOccidenteS.A.Member2017-08-310001232384trp:SurdeTexasTransmissionSystemMemberus-gaap:CorporateJointVentureMember2019-01-012019-12-310001232384trp:SurdeTexasTransmissionSystemMemberus-gaap:CorporateJointVentureMember2017-01-012017-12-310001232384trp:TransGasdeOccidenteS.A.Member2017-08-012017-08-310001232384trp:SurdeTexasTransmissionSystemMemberus-gaap:CorporateJointVentureMember2019-12-310001232384us-gaap:RevolvingCreditFacilityMemberus-gaap:UnsecuredDebtMemberus-gaap:CorporateJointVentureMember2017-12-310001232384trp:SurdeTexasTransmissionSystemMembertrp:MexicoNaturalGasPipelinesMember2019-12-310001232384trp:CanaportEnergyEastMarineLimitedPartnershipMembertrp:EnergyEastEasternMainlineandUplandProjectsMembertrp:LiquidsPipelinesSegmentMember2017-10-012017-10-310001232384trp:SurdeTexasTransmissionSystemMember2017-01-012017-12-310001232384trp:NorthernBorderPipelineCompanyMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384trp:SurdeTexasTransmissionSystemMemberus-gaap:CorporateJointVentureMember2018-01-012018-12-310001232384trp:GrandRapidsMember2018-12-310001232384trp:GrandRapidsMember2019-12-310001232384trp:SurdeTexasTransmissionSystemMember2018-01-012018-12-310001232384trp:BrucePowerMembertrp:PowerandStorageSegmentMember2019-12-310001232384trp:BrucePowerMembertrp:PowerandStorageSegmentMember2018-12-310001232384trp:NorthernCourierMember2019-12-310001232384trp:IroquoisGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384trp:CanaportEnergyEastMarineLimitedPartnershipMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384trp:NorthernBorderPipelineCompanyMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384trp:SurdeTexasTransmissionSystemMemberus-gaap:CorporateJointVentureMember2018-12-310001232384trp:PortlandsEnergyMembertrp:PowerandStorageSegmentMember2018-12-310001232384trp:PortlandsEnergyMembertrp:PowerandStorageSegmentMember2019-12-310001232384trp:TransCanadaTurbinesMembertrp:PowerandStorageSegmentMember2019-01-012019-12-310001232384trp:NorthernBorderPipelineCompanyMembertrp:U.S.NaturalGasPipelinesMember2017-01-012017-12-310001232384trp:PennantMidstreamGasTransmissionSystemMembertrp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384trp:IroquoisGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2017-01-012017-12-310001232384trp:OtherEquityMethodInvesteeMembertrp:U.S.NaturalGasPipelinesMember2017-01-012017-12-310001232384trp:PennantMidstreamGasTransmissionSystemMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384trp:PennantMidstreamGasTransmissionSystemMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384trp:TransQuebecAndMaritimesPipelineIncMembertrp:CanadianNaturalGasPipelinesMember2018-12-310001232384trp:OtherEquityMethodInvesteeMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384trp:NorthernCourierMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384trp:GrandRapidsMembertrp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384trp:SurdeTexasTransmissionSystemMembertrp:MexicoNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:OtherEquityMethodInvesteeMembertrp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384trp:BrucePowerMembertrp:PowerandStorageSegmentMember2018-01-012018-12-310001232384trp:TransQuebecAndMaritimesPipelineIncMembertrp:CanadianNaturalGasPipelinesMember2019-12-310001232384trp:SurdeTexasTransmissionSystemMembertrp:MexicoNaturalGasPipelinesMember2018-12-310001232384trp:TransGasdeOccidenteS.A.Membertrp:MexicoNaturalGasPipelinesMember2017-08-310001232384trp:MillenniumGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384trp:TransQuebecAndMaritimesPipelineIncMembertrp:CanadianNaturalGasPipelinesMember2017-01-012017-12-310001232384trp:TransCanadaTurbinesMembertrp:PowerandStorageSegmentMember2019-12-310001232384trp:MillenniumGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384trp:OtherEquityMethodInvesteeMembertrp:U.S.NaturalGasPipelinesMember2018-01-012018-12-310001232384trp:PennantMidstreamGasTransmissionSystemMembertrp:U.S.NaturalGasPipelinesMember2017-01-012017-12-310001232384trp:GrandRapidsMembertrp:LiquidsPipelinesSegmentMember2018-12-310001232384trp:TransGasdeOccidenteS.A.Membertrp:MexicoNaturalGasPipelinesMember2019-12-310001232384trp:IroquoisGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384trp:NorthernBorderPipelineCompanyMembertrp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384trp:PortlandsEnergyMembertrp:PowerandStorageSegmentMember2018-01-012018-12-310001232384trp:GrandRapidsMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384trp:NorthernCourierMembertrp:LiquidsPipelinesSegmentMember2017-01-012017-12-310001232384trp:MillenniumGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2018-01-012018-12-310001232384trp:TransQuebecAndMaritimesPipelineIncMembertrp:CanadianNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:TransGasdeOccidenteS.A.Membertrp:MexicoNaturalGasPipelinesMember2018-01-012018-12-310001232384trp:MillenniumGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2017-01-012017-12-310001232384trp:NorthernCourierMembertrp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384trp:GrandRapidsMembertrp:LiquidsPipelinesSegmentMember2018-01-012018-12-310001232384trp:SurdeTexasTransmissionSystemMembertrp:MexicoNaturalGasPipelinesMember2018-01-012018-12-310001232384trp:OtherEquityMethodInvesteeMembertrp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384trp:OtherEquityMethodInvesteeMembertrp:U.S.NaturalGasPipelinesMember2019-12-310001232384trp:TransGasdeOccidenteS.A.Membertrp:MexicoNaturalGasPipelinesMember2017-01-012017-12-310001232384trp:OtherEquityMethodInvesteeMembertrp:LiquidsPipelinesSegmentMember2017-01-012017-12-310001232384trp:OtherEquityMethodInvesteeMembertrp:LiquidsPipelinesSegmentMember2018-01-012018-12-310001232384trp:PortlandsEnergyMembertrp:PowerandStorageSegmentMember2017-01-012017-12-310001232384trp:TransQuebecAndMaritimesPipelineIncMembertrp:CanadianNaturalGasPipelinesMember2018-01-012018-12-310001232384trp:PennantMidstreamGasTransmissionSystemMembertrp:U.S.NaturalGasPipelinesMember2018-01-012018-12-310001232384trp:TransCanadaTurbinesMembertrp:PowerandStorageSegmentMember2018-01-012018-12-310001232384trp:TransGasdeOccidenteS.A.Membertrp:MexicoNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:OtherEquityMethodInvesteeMembertrp:LiquidsPipelinesSegmentMember2019-12-310001232384trp:MillenniumGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384trp:OtherEquityMethodInvesteeMembertrp:U.S.NaturalGasPipelinesMember2018-12-310001232384trp:NorthernCourierMembertrp:LiquidsPipelinesSegmentMember2018-01-012018-12-310001232384trp:BrucePowerMembertrp:PowerandStorageSegmentMember2019-01-012019-12-310001232384trp:TransGasdeOccidenteS.A.Membertrp:MexicoNaturalGasPipelinesMember2018-12-310001232384trp:GrandRapidsMembertrp:LiquidsPipelinesSegmentMember2017-01-012017-12-310001232384trp:TransCanadaTurbinesMembertrp:PowerandStorageSegmentMember2017-01-012017-12-310001232384trp:NorthernBorderPipelineCompanyMembertrp:U.S.NaturalGasPipelinesMember2018-01-012018-12-310001232384trp:IroquoisGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2018-01-012018-12-310001232384trp:SurdeTexasTransmissionSystemMembertrp:MexicoNaturalGasPipelinesMember2017-01-012017-12-310001232384trp:PortlandsEnergyMembertrp:PowerandStorageSegmentMember2019-01-012019-12-310001232384trp:TransCanadaTurbinesMembertrp:PowerandStorageSegmentMember2018-12-310001232384trp:BrucePowerMembertrp:PowerandStorageSegmentMember2017-01-012017-12-310001232384trp:ForeignExchangeOnLongTermDebtMember2019-12-310001232384trp:ANRMemberus-gaap:PensionAndOtherPostretirementPlansCostsMember2019-12-310001232384trp:LongTermAdjustmentAccountMember2018-12-310001232384trp:ForeignExchangeOnLongTermDebtMember2018-12-310001232384trp:BridgingAmortizationAccountMember2018-12-310001232384us-gaap:RemovalCostsMember2018-12-310001232384trp:AbandonmentCostsMember2019-12-310001232384us-gaap:DeferredIncomeTaxChargesMember2018-12-310001232384trp:AbandonmentCostsMember2018-12-310001232384trp:DeferredIncomeTaxesUSTaxReformMember2019-12-310001232384trp:OperatingAndDebtServiceRegulatoryLiabilitiesMember2018-12-310001232384trp:BridgingAmortizationAccountMember2019-12-310001232384us-gaap:PensionAndOtherPostretirementPlansCostsMember2019-12-310001232384trp:OperatingAndDebtServiceRegulatoryAssetsMember2019-12-310001232384us-gaap:DeferredIncomeTaxChargesMember2019-12-310001232384trp:OperatingAndDebtServiceRegulatoryAssetsMember2018-12-310001232384trp:LongTermAdjustmentAccountMember2019-12-310001232384trp:ANRMemberus-gaap:PensionAndOtherPostretirementPlansCostsMember2018-12-310001232384trp:OtherRegulatoryLiabilitiesMember2019-12-310001232384us-gaap:RemovalCostsMember2019-12-310001232384trp:OtherRegulatoryLiabilitiesMember2018-12-310001232384us-gaap:PensionAndOtherPostretirementPlansCostsMember2018-12-310001232384trp:OperatingAndDebtServiceRegulatoryLiabilitiesMember2019-12-310001232384trp:DeferredIncomeTaxesMember2019-12-310001232384trp:DeferredIncomeTaxesMember2018-12-310001232384trp:OtherRegulatoryAssetsMember2018-12-310001232384trp:DeferredIncomeTaxesUSTaxReformMember2018-12-310001232384trp:OtherRegulatoryAssetsMember2019-12-310001232384trp:CanadianMainlineMember2017-01-012017-12-310001232384trp:CanadianMainlineMember2014-01-012014-12-310001232384trp:ColumbiaGasTransmissionMember2013-01-012013-12-310001232384trp:ColumbiaGasTransmissionMember2016-03-012016-03-310001232384trp:GreatLakesMember2018-02-222018-02-220001232384trp:NGTLSystemMember2018-06-012018-06-300001232384trp:ANRMemberus-gaap:PostretirementBenefitCostsMember2018-12-312018-12-310001232384trp:ANRMemberus-gaap:PostretirementBenefitCostsMember2006-01-012006-12-310001232384trp:LongTermAdjustmentAccountAmountToBeAmortizedOverOneYearMember2019-12-310001232384trp:LongTermAdjustmentAccountAmountToBeAmortizedOverOneYearMember2019-01-012019-12-310001232384trp:CanadianMainlineMember2018-01-012018-12-310001232384trp:TCPipeLinesLPMember2019-12-310001232384srt:MaximumMembertrp:LongTermAdjustmentAccountMember2019-01-012019-12-310001232384trp:OperatingAndDebtServiceRegulatoryAssetsMember2019-01-012019-12-310001232384trp:BridgingAmortizationAccountMember2019-01-012019-12-310001232384srt:MinimumMembertrp:LongTermAdjustmentAccountMember2019-01-012019-12-310001232384srt:MaximumMembertrp:ForeignExchangeOnLongTermDebtMember2019-01-012019-12-310001232384trp:OperatingAndDebtServiceRegulatoryLiabilitiesMember2019-01-012019-12-310001232384srt:MinimumMembertrp:ForeignExchangeOnLongTermDebtMember2019-01-012019-12-310001232384trp:GreatLakesMember2018-02-212018-02-210001232384trp:TuscaroraGasTransmissionCompanyMember2019-12-310001232384trp:TuscaroraGasTransmissionCompanyMember2018-01-012018-12-310001232384trp:MidstreamMember2019-08-010001232384trp:U.S.NaturalGasPipelinesMember2017-12-310001232384trp:U.S.NaturalGasPipelinesMember2018-12-310001232384trp:TuscaroraGasTransmissionCompanyMember2018-12-310001232384trp:KeystoneXLMember2018-12-310001232384trp:CoastalGasLinkPipelineProjectMember2018-11-012018-11-300001232384trp:PacificNorthwestLNGProjectMember2017-10-012017-10-310001232384trp:KeystoneXLMember2019-12-310001232384trp:TransCanadaPipelinesLimitedandTransCanadaPipelinesUSAMemberus-gaap:RevolvingCreditFacilityMember2019-12-310001232384trp:TCPLTCPLUSAColumbiaandTAILMemberus-gaap:RevolvingCreditFacilityMembertrp:UnsecuredCreditFacilityMaturingDecember2020Member2018-12-310001232384trp:TransCanadaPipelinesLimitedandTransCanadaPipelinesUSAMemberus-gaap:RevolvingCreditFacilityMember2018-12-310001232384trp:TCPLTCPLUSAColumbiaandTAILMemberus-gaap:RevolvingCreditFacilityMembertrp:UnsecuredCreditFacilityMaturingDecember2022Member2019-12-310001232384trp:TransCanadaPipeLinesLimitedMemberus-gaap:RevolvingCreditFacilityMembertrp:UnsecuredCreditFacilityMaturingDecember2024Member2018-12-310001232384trp:TCPLTCPLUSAColumbiaandTAILMemberus-gaap:RevolvingCreditFacilityMembertrp:UnsecuredCreditFacilityMaturingDecember2022Member2018-12-310001232384trp:TCPLTCPLUSAColumbiaandTAILMemberus-gaap:RevolvingCreditFacilityMembertrp:UnsecuredCreditFacilityMaturingDecember2020Member2019-12-310001232384trp:MexicanSubsidiaryMemberus-gaap:RevolvingCreditFacilityMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMemberus-gaap:RevolvingCreditFacilityMembertrp:UnsecuredCreditFacilityMaturingDecember2024Member2019-12-310001232384trp:MexicanSubsidiaryMemberus-gaap:RevolvingCreditFacilityMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMemberus-gaap:CommercialPaperMember2018-12-310001232384trp:MexicanSubsidiaryMemberus-gaap:CommercialPaperMember2019-12-310001232384trp:MexicanSubsidiaryMemberus-gaap:CommercialPaperMember2018-12-310001232384trp:TransCanadaAmericanInvestmentsLtd.andTransCanadaPowerMarketingLtd.Memberus-gaap:CommercialPaperMember2018-12-310001232384trp:TransCanadaAmericanInvestmentsLtd.andTransCanadaPowerMarketingLtd.Memberus-gaap:CommercialPaperMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMemberus-gaap:CommercialPaperMember2019-12-310001232384us-gaap:RevolvingCreditFacilityMember2018-01-012018-12-310001232384trp:RevolvingAndDemandCreditFacilityMember2019-12-310001232384us-gaap:CommercialPaperMember2018-12-310001232384us-gaap:RevolvingCreditFacilityMember2019-01-012019-12-310001232384srt:AffiliatedEntityMember2019-12-310001232384trp:RevolvingAndDemandCreditFacilityMember2018-12-310001232384us-gaap:CommercialPaperMember2019-12-310001232384us-gaap:RevolvingCreditFacilityMember2017-01-012017-12-310001232384srt:AffiliatedEntityMember2018-12-3100012323842019-10-222019-10-220001232384trp:ColumbiaPipelinePartnersLPMemberus-gaap:NoncontrollingInterestMember2019-10-220001232384us-gaap:DomesticCountryMember2019-12-310001232384us-gaap:InternalRevenueServiceIRSMember2019-12-310001232384us-gaap:DomesticCountryMember2018-12-310001232384us-gaap:MexicanTaxAuthorityMember2019-12-310001232384us-gaap:DomesticCountryMembertrp:AlternativeMinimumTaxMember2019-12-3100012323842019-06-012019-06-300001232384us-gaap:DomesticCountryMembertrp:AlternativeMinimumTaxMember2018-12-3100012323842018-10-012018-12-310001232384us-gaap:InternalRevenueServiceIRSMember2018-12-310001232384us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2017-01-012017-12-310001232384us-gaap:MexicanTaxAuthorityMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotes1.875PercentInterestRateDueJanuary2018Member2018-01-012018-01-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:DebenturesDueMarch2018Member2018-03-012018-03-310001232384trp:GreatLakesGasTransmissionLimitedPartnershipMembertrp:SeniorUnsecuredNotesDueMarch2018Member2018-03-012018-03-310001232384trp:TCPipeLinesLPMembertrp:UnsecuredTermLoanDueJune2019Member2019-06-012019-06-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:DebenturesDueMarch2019Member2019-03-012019-03-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:BridgeFacilityFloatingRatesMember2017-02-012017-02-280001232384trp:TransCanadaPipeLinesLimitedMembertrp:DebenturesDueMarch2019Member2019-03-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:BridgeFacilityFloatingRatesMember2017-06-012017-06-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueAugust2018Member2018-08-012018-08-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueJanuary2019OneMember2019-01-310001232384trp:TransCanadaPipeLineUSALTDMembertrp:BridgeFacilityFloatingRatesMember2017-06-012017-06-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNote1.625PercentInterestRateDueNovember2017Member2017-11-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueMay2019Member2019-05-012019-05-310001232384trp:PortlandNaturalGasTransmissionSystemMembertrp:SeniorSecuredNotesDueMay2018Member2018-05-310001232384trp:GasTransmissionNorthwestCorporationMembertrp:UnsecuredTermLoanDueMay2019Member2019-05-012019-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueAugust2018Member2018-08-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesFloatingRatesDueinJanuary2018Member2018-01-012018-01-310001232384trp:ColumbiaPipelineGroupIncMembertrp:SeniorUnsecuredNotesDueJune2018Member2018-06-300001232384trp:TCPipeLinesLPMembertrp:UnsecuredTermLoanDueDecember2018Member2018-12-012018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:Debentures9.80PercentInterestRateMember2017-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueMay2019Member2019-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueJanuary2019TwoMember2019-01-012019-01-310001232384trp:ColumbiaPipelineGroupIncMembertrp:SeniorUnsecuredNotesDueJune2018Member2018-06-012018-06-300001232384trp:TuscaroraGasTransmissionCompanyMembertrp:SeniorSecuredNotes3.82PercentInterestRateMember2017-08-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:DebenturesDueMarch2018Member2018-03-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotes1.875PercentInterestRateDueJanuary2018Member2018-01-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueNovember2019TwoMember2019-11-012019-11-300001232384trp:PortlandNaturalGasTransmissionSystemMembertrp:SeniorSecuredNotesDueMay2018Member2018-05-012018-05-310001232384trp:TransCanadaPipeLineUSALTDMembertrp:BridgeFacilityFloatingRatesMember2017-04-012017-04-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotes5.10PercentInterestRateMember2017-01-012017-01-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:Debentures9.80PercentInterestRateMember2017-12-012017-12-310001232384trp:TuscaroraGasTransmissionCompanyMembertrp:SeniorSecuredNotes3.82PercentInterestRateMember2017-08-012017-08-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueNovember2019OneMember2019-11-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNote1.625PercentInterestRateDueNovember2017Member2017-11-012017-11-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueJanuary2019OneMember2019-01-012019-01-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueJanuary2019TwoMember2019-01-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotes5.10PercentInterestRateMember2017-01-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueNovember2019OneMember2019-11-012019-11-300001232384trp:GreatLakesGasTransmissionLimitedPartnershipMembertrp:SeniorUnsecuredNotesDueMarch2018Member2018-03-310001232384trp:TCPipeLinesLPMembertrp:UnsecuredTermLoanMember2019-12-310001232384trp:NovaGasTransmissionLTDMember2018-12-310001232384trp:NovaGasTransmissionLTDMembertrp:MediumTermNotesMaturityDateof2026Member2019-12-310001232384trp:TCPipeLinesLPMembertrp:SeniorUnsecuredNotesMember2018-12-310001232384trp:NovaGasTransmissionLTDMembertrp:MediumTermNotesMaturityDateof2026Member2018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesMember2019-12-310001232384trp:NovaGasTransmissionLTDMembertrp:DebenturesandNotesMaturityDateof2023Member2019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesMember2018-12-310001232384trp:NovaGasTransmissionLTDMember2019-12-310001232384trp:ANRPipeLineCompanyMembertrp:SeniorUnsecuredNotesMember2018-12-310001232384trp:PortlandNaturalGasTransmissionSystemMemberus-gaap:UnsecuredDebtMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:DebenturesMaturityDateof2021Member2019-12-310001232384trp:TCPipeLinesLPMembertrp:UnsecuredTermLoanMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:DebenturesMaturityDateof2021Member2018-12-310001232384trp:NorthBajaPipelineLLCMembertrp:UnsecuredTermLoanMember2018-12-310001232384trp:NovaGasTransmissionLTDMembertrp:MediumTermNotesMaturitybetween2025and2030Member2019-12-310001232384trp:GasTransmissionNorthwestCorporationMembertrp:SeniorUnsecuredNotesMember2019-12-310001232384trp:GasTransmissionNorthwestCorporationMember2018-12-310001232384trp:NorthBajaPipelineLLCMembertrp:UnsecuredTermLoanMember2019-12-310001232384trp:GreatLakesGasTransmissionLimitedPartnershipMembertrp:SeniorUnsecuredNotesMember2019-12-310001232384trp:ColumbiaPipelineGroupIncMembertrp:SeniorUnsecuredNotesMember2019-12-310001232384trp:NovaGasTransmissionLTDMembertrp:DebenturesandNotesMaturityDate2024Member2018-12-310001232384trp:GreatLakesGasTransmissionLimitedPartnershipMembertrp:SeniorUnsecuredNotesMember2018-12-310001232384trp:NovaGasTransmissionLTDMembertrp:DebenturesandNotesMaturityDateof2023Member2018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:DebenturesMaturityDatesBetween2019and2020Member2018-12-310001232384trp:TCPipeLinesLPMemberus-gaap:UnsecuredDebtMember2019-12-310001232384trp:ColumbiaPipelineGroupIncMembertrp:SeniorUnsecuredNotesMember2018-12-310001232384trp:GasTransmissionNorthwestCorporationMembertrp:UnsecuredTermLoanMember2018-12-310001232384trp:NovaGasTransmissionLTDMembertrp:MediumTermNotesMaturitybetween2025and2030Member2018-12-310001232384trp:TCPipeLinesLPMemberus-gaap:UnsecuredDebtMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:DebenturesMaturityDatesBetween2019and2020Member2019-12-310001232384trp:TuscaroraGasTransmissionCompanyMembertrp:UnsecuredTermLoanMember2019-12-310001232384trp:TuscaroraGasTransmissionCompanyMembertrp:UnsecuredTermLoanMember2018-12-310001232384trp:NovaGasTransmissionLTDMembertrp:DebenturesandNotesMaturityDate2024Member2019-12-310001232384trp:TransCanadaPipeLinesLimitedMemberus-gaap:MediumTermNotesMember2019-12-310001232384trp:GasTransmissionNorthwestCorporationMembertrp:SeniorUnsecuredNotesMember2018-12-310001232384trp:PortlandNaturalGasTransmissionSystemMemberus-gaap:UnsecuredDebtMember2018-12-310001232384trp:GasTransmissionNorthwestCorporationMembertrp:UnsecuredTermLoanMember2019-12-310001232384trp:GasTransmissionNorthwestCorporationMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMemberus-gaap:MediumTermNotesMember2018-12-310001232384trp:TCPipeLinesLPMember2018-12-310001232384trp:ANRPipeLineCompanyMembertrp:SeniorUnsecuredNotesMember2019-12-310001232384trp:TCPipeLinesLPMembertrp:SeniorUnsecuredNotesMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueMarch2049Member2018-10-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNote2.125PercentInterestRateMember2017-11-012017-11-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueMay2038Member2018-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueJuly2048Member2019-09-300001232384trp:TCPipeLinesLPMembertrp:SeniorUnsecuredNotes3.90PercentInterestRateMember2017-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueMay2028Member2018-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueSeptember2029Member2019-09-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotes3.39PercentRateMember2017-09-012017-09-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueMarch2028Member2018-07-012018-07-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueMay2028Member2018-10-012018-10-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesFloatingInterestRateMember2017-11-012017-11-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueMay2048Member2018-05-012018-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueJuly2048Member2018-07-012018-07-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueMay2028Member2018-10-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotes4.33Member2017-09-012017-09-300001232384trp:NorthernCourierMembertrp:SeniorSecuredNotesDueJune2042Member2019-07-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueMay2048Member2018-05-310001232384trp:NorthernCourierMembertrp:SeniorSecuredNotesDueJune2042Member2019-07-012019-07-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNote2.125PercentInterestRateMember2017-11-300001232384trp:PortlandNaturalGasTransmissionSystemMembertrp:UnsecuredLoanFacilityDueApril2023Member2018-04-012018-04-300001232384trp:NorthBajaPipelineLLCMembertrp:UnsecuredTermLoanDueDecember2021Member2018-12-012018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueMarch2049Member2018-10-012018-10-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueMay2028Member2018-05-012018-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueMarch2028Member2018-07-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueOctober2049Member2019-04-012019-04-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotes4.33Member2017-09-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotes3.39PercentRateMember2017-09-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueOctober2049Member2019-04-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueJuly2048Member2018-07-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueSeptember2029Member2019-09-012019-09-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:SeniorUnsecuredNotesDueMay2038Member2018-05-012018-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:MediumTermNotesDueJuly2048Member2019-09-012019-09-300001232384trp:TuscaroraGasTransmissionCompanyMembertrp:UnsecuredTermLoanFloatingRateDueAugust2020Member2017-08-012017-08-310001232384trp:TCPipeLinesLPMembertrp:SeniorUnsecuredNotes3.90PercentInterestRateMember2017-05-012017-05-310001232384trp:ColumbiaPipelineGroupIncMember2018-01-012018-12-310001232384trp:ColumbiaPipelineGroupIncMember2019-01-012019-12-310001232384trp:LongTermDebtExcludingJuniorSubordinatedNotesMember2017-01-012017-12-310001232384trp:LongTermDebtExcludingJuniorSubordinatedNotesMember2019-01-012019-12-310001232384us-gaap:CommercialPaperMember2019-01-012019-12-310001232384us-gaap:JuniorSubordinatedDebtMember2018-01-012018-12-310001232384trp:LongTermDebtExcludingJuniorSubordinatedNotesMember2018-01-012018-12-310001232384us-gaap:CommercialPaperMember2018-01-012018-12-310001232384us-gaap:JuniorSubordinatedDebtMember2017-01-012017-12-310001232384us-gaap:CommercialPaperMember2017-01-012017-12-310001232384us-gaap:JuniorSubordinatedDebtMember2019-01-012019-12-310001232384trp:TransCanadaTrustMembertrp:TrustNotesSeries2019AMemberus-gaap:NotesPayableOtherPayablesMember2019-09-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2067Memberus-gaap:JuniorSubordinatedDebtMember2017-05-310001232384trp:TransCanadaTrustMembertrp:PeriodOneMembertrp:TrustNotesSeries2017AMemberus-gaap:NotesPayableOtherPayablesMember2017-03-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:TrustNotesSeries2017BMemberus-gaap:JuniorSubordinatedDebtMember2017-05-310001232384trp:TransCanadaTrustMembertrp:TrustNotesSeries2017BMemberus-gaap:NotesPayableOtherPayablesMember2017-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:TrustNotesSeries2017AMemberus-gaap:JuniorSubordinatedDebtMember2017-03-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:TrustNotesSeries2019AMemberus-gaap:JuniorSubordinatedDebtMember2019-09-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:TrustNotesSeries2017BMemberus-gaap:JuniorSubordinatedDebtMember2017-05-012017-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:PeriodFourMembertrp:TrustNotesSeries2017BMemberus-gaap:JuniorSubordinatedDebtMemberus-gaap:LondonInterbankOfferedRateLIBORMember2017-05-012017-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:PeriodSevenMembertrp:TrustNotesSeries2017AMemberus-gaap:JuniorSubordinatedDebtMemberus-gaap:LondonInterbankOfferedRateLIBORMember2017-03-012017-03-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2067Memberus-gaap:JuniorSubordinatedDebtMember2019-01-012019-12-310001232384trp:TransCanadaTrustMembertrp:TrustNotesSeries2017AMemberus-gaap:NotesPayableOtherPayablesMember2017-01-012017-03-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:PeriodSixMembertrp:TrustNotesSeries2017AMemberus-gaap:JuniorSubordinatedDebtMemberus-gaap:LondonInterbankOfferedRateLIBORMember2017-03-012017-03-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:TrustNotesSeries2017AMemberus-gaap:JuniorSubordinatedDebtMember2017-03-012017-03-310001232384trp:TransCanadaTrustMembertrp:TrustNotesSeries2017AMemberus-gaap:NotesPayableOtherPayablesMember2017-03-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2067Memberus-gaap:JuniorSubordinatedDebtMember2017-05-012017-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:PeriodThreeMembertrp:TrustNotesSeries2019AMemberus-gaap:JuniorSubordinatedDebtMemberus-gaap:LondonInterbankOfferedRateLIBORMember2019-09-012019-09-300001232384trp:TransCanadaTrustMembertrp:PeriodOneMembertrp:TrustNotesSeries2019AMemberus-gaap:NotesPayableOtherPayablesMember2019-09-300001232384trp:TransCanadaTrustMembertrp:TrustNotesSeries2017BMemberus-gaap:NotesPayableOtherPayablesMember2017-05-012017-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:PeriodFiveMembertrp:TrustNotesSeries2017BMemberus-gaap:JuniorSubordinatedDebtMemberus-gaap:LondonInterbankOfferedRateLIBORMember2017-05-012017-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2067Memberus-gaap:JuniorSubordinatedDebtMemberus-gaap:LondonInterbankOfferedRateLIBORMember2017-05-012017-05-310001232384trp:TransCanadaTrustMembertrp:TrustNotesSeries2019AMemberus-gaap:NotesPayableOtherPayablesMember2019-09-012019-09-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:PeriodTwoMembertrp:TrustNotesSeries2019AMemberus-gaap:JuniorSubordinatedDebtMemberus-gaap:LondonInterbankOfferedRateLIBORMember2019-09-012019-09-300001232384trp:TransCanadaPipeLinesLimitedMembertrp:TrustNotesSeries2019AMemberus-gaap:JuniorSubordinatedDebtMember2019-09-012019-09-300001232384trp:TransCanadaTrustMembertrp:PeriodOneMembertrp:TrustNotesSeries2017BMemberus-gaap:NotesPayableOtherPayablesMember2017-05-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2075Memberus-gaap:JuniorSubordinatedDebtMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2067Memberus-gaap:JuniorSubordinatedDebtMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2079Memberus-gaap:JuniorSubordinatedDebtMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMemberus-gaap:JuniorSubordinatedDebtMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2067Memberus-gaap:JuniorSubordinatedDebtMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDueTwoThousandSeventySixMemberus-gaap:JuniorSubordinatedDebtMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:CanadianJuniorSubordinatedDebtDue2077Memberus-gaap:JuniorSubordinatedDebtMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDueTwoThousandSeventySevenMemberus-gaap:JuniorSubordinatedDebtMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:CanadianJuniorSubordinatedDebtDue2077Memberus-gaap:JuniorSubordinatedDebtMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMemberus-gaap:JuniorSubordinatedDebtMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2079Memberus-gaap:JuniorSubordinatedDebtMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2075Memberus-gaap:JuniorSubordinatedDebtMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDueTwoThousandSeventySevenMemberus-gaap:JuniorSubordinatedDebtMember2019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDueTwoThousandSeventySixMemberus-gaap:JuniorSubordinatedDebtMember2018-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2079Memberus-gaap:JuniorSubordinatedDebtMember2019-01-012019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDueTwoThousandSeventySevenMemberus-gaap:JuniorSubordinatedDebtMember2019-01-012019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:CanadianJuniorSubordinatedDebtDue2077Memberus-gaap:JuniorSubordinatedDebtMember2019-01-012019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDueTwoThousandSeventySixMemberus-gaap:JuniorSubordinatedDebtMember2019-01-012019-12-310001232384trp:TransCanadaPipeLinesLimitedMembertrp:JuniorSubordinatedDebtDue2075Memberus-gaap:JuniorSubordinatedDebtMember2019-01-012019-12-310001232384trp:TCPipeLinesLPMemberus-gaap:NoncontrollingInterestMember2018-01-012018-12-310001232384trp:ColumbiaPipelinePartnersLPMemberus-gaap:NoncontrollingInterestMember2019-01-012019-12-310001232384trp:TCPipeLinesLPMemberus-gaap:NoncontrollingInterestMember2019-01-012019-12-310001232384trp:TCPipeLinesLPMemberus-gaap:NoncontrollingInterestMember2017-01-012017-12-310001232384trp:PortlandNaturalGasTransmissionSystemMemberus-gaap:NoncontrollingInterestMember2018-01-012018-12-310001232384trp:PortlandNaturalGasTransmissionSystemMemberus-gaap:NoncontrollingInterestMember2019-01-012019-12-310001232384trp:ColumbiaPipelinePartnersLPMemberus-gaap:NoncontrollingInterestMember2017-01-012017-12-310001232384trp:ColumbiaPipelinePartnersLPMemberus-gaap:NoncontrollingInterestMember2018-01-012018-12-310001232384trp:PortlandNaturalGasTransmissionSystemMemberus-gaap:NoncontrollingInterestMember2017-01-012017-12-310001232384trp:TCPipeLinesLPMemberus-gaap:NoncontrollingInterestMember2016-12-310001232384trp:TCPipeLinesLPMemberus-gaap:NoncontrollingInterestMember2019-12-310001232384trp:TCPipeLinesLPMembersrt:MinimumMemberus-gaap:NoncontrollingInterestMember2017-12-310001232384trp:TCPipeLinesLPMembersrt:MaximumMemberus-gaap:NoncontrollingInterestMember2017-12-310001232384trp:ColumbiaPipelinePartnersLPMemberus-gaap:NoncontrollingInterestMember2017-02-172017-02-170001232384trp:TCPipeLinesLPMembersrt:MaximumMemberus-gaap:NoncontrollingInterestMember2018-12-310001232384trp:TCPipeLinesLPMembersrt:MinimumMemberus-gaap:NoncontrollingInterestMember2018-12-310001232384trp:PortlandNaturalGasTransmissionSystemMemberus-gaap:NoncontrollingInterestMember2017-06-012017-06-010001232384trp:ColumbiaPipelinePartnersLPMemberus-gaap:NoncontrollingInterestMember2017-02-170001232384trp:PortlandNaturalGasTransmissionSystemMemberus-gaap:NoncontrollingInterestMember2019-12-310001232384trp:TCPipeLinesLPMemberus-gaap:NoncontrollingInterestMember2016-01-012016-12-310001232384trp:TCPipeLinesLPMemberus-gaap:NoncontrollingInterestMember2018-12-310001232384trp:AttheMarketEquityIssuanceProgramMember2018-06-300001232384trp:AttheMarketEquityIssuanceProgramMember2017-12-312017-12-310001232384trp:AttheMarketEquityIssuanceProgramMember2017-12-310001232384trp:AttheMarketEquityIssuanceProgramMember2018-01-012018-12-310001232384trp:AttheMarketEquityIssuanceProgramMember2017-06-300001232384us-gaap:EmployeeStockOptionMember2019-01-012019-12-310001232384trp:AttheMarketEquityIssuanceProgramMember2017-06-012017-06-300001232384trp:AttheMarketEquityIssuanceProgramMember2018-12-310001232384trp:AttheMarketEquityIssuanceProgramMember2018-06-012018-06-300001232384trp:AttheMarketEquityIssuanceProgramMember2019-01-012019-12-310001232384us-gaap:ShareBasedCompensationAwardTrancheOneMember2019-01-012019-12-310001232384us-gaap:ShareBasedCompensationAwardTrancheThreeMember2019-01-012019-12-310001232384us-gaap:ShareBasedCompensationAwardTrancheTwoMember2019-01-012019-12-310001232384trp:Series11CumulativePreferredStockMember2019-12-310001232384trp:SeriesThirteenCumulativePreferredStockMember2019-12-310001232384trp:SeriesTwoPreferredStockMember2019-12-310001232384trp:SeriesFourPreferredStockMember2017-12-310001232384trp:SeriesThreePreferredStockMember2019-12-310001232384trp:Series9PreferredStockMember2018-12-310001232384trp:Series9PreferredStockMember2019-01-012019-12-310001232384trp:SeriesFivePreferredStockMember2018-12-310001232384trp:SeriesThreePreferredStockMember2019-01-012019-12-310001232384trp:Series7PreferredStockMember2018-12-310001232384trp:Series7PreferredStockMember2019-12-310001232384trp:SeriesFifteenCumulativePreferredStockMember2018-12-310001232384trp:SeriesFourPreferredStockMember2019-12-310001232384trp:SeriesOnePreferredStockMember2019-01-012019-12-310001232384trp:Series11CumulativePreferredStockMember2017-12-310001232384trp:Series7PreferredStockMember2019-01-012019-12-310001232384trp:SeriesOnePreferredStockMember2018-12-310001232384trp:SeriesThirteenCumulativePreferredStockMember2019-01-012019-12-310001232384trp:SeriesFivePreferredStockMember2017-12-310001232384trp:SeriesFifteenCumulativePreferredStockMember2019-12-310001232384trp:SeriesFourPreferredStockMember2018-12-310001232384trp:SeriesFivePreferredStockMember2019-12-310001232384trp:SeriesThirteenCumulativePreferredStockMember2017-12-310001232384trp:SeriesFivePreferredStockMember2019-01-012019-12-310001232384trp:SeriesOnePreferredStockMember2019-12-310001232384trp:SeriesSixPreferredStockMember2019-12-310001232384trp:SeriesThreePreferredStockMember2017-12-310001232384trp:Series7PreferredStockMember2017-12-310001232384trp:Series11CumulativePreferredStockMember2019-01-012019-12-310001232384trp:SeriesTwoPreferredStockMember2017-12-310001232384trp:SeriesOnePreferredStockMember2017-12-310001232384trp:SeriesThreePreferredStockMember2018-12-310001232384trp:Series11CumulativePreferredStockMember2018-12-310001232384trp:Series9PreferredStockMember2019-12-310001232384trp:SeriesFifteenCumulativePreferredStockMember2017-12-310001232384trp:Series9PreferredStockMember2017-12-310001232384trp:SeriesSixPreferredStockMember2018-12-310001232384trp:SeriesSixPreferredStockMember2017-12-310001232384trp:SeriesFifteenCumulativePreferredStockMember2019-01-012019-12-310001232384trp:SeriesThirteenCumulativePreferredStockMember2018-12-310001232384trp:SeriesTwoPreferredStockMember2018-12-310001232384trp:SeriesFourPreferredStockMembertrp:GovernmentofCanada90DayTreasuryBillRateMember2019-12-310001232384trp:Series7PreferredStockMember2019-04-302019-04-300001232384trp:SeriesFifteenCumulativePreferredStockMembertrp:GovernmentofCanadaFiveYearBondYieldMember2019-12-310001232384trp:SeriesFivePreferredStockMembertrp:GovernmentofCanadaFiveYearBondYieldMember2019-12-310001232384trp:SeriesThirteenCumulativePreferredStockMembertrp:GovernmentofCanadaFiveYearBondYieldMember2019-12-310001232384trp:Series11CumulativePreferredStockMembertrp:GovernmentofCanadaFiveYearBondYieldMember2019-12-310001232384trp:SeriesFourteenPreferredStockMembertrp:GovernmentofCanada90DayTreasuryBillRateMember2019-12-310001232384trp:SeriesOnePreferredStockMember2019-12-312019-12-310001232384trp:SeriesSixPreferredStockMembertrp:GovernmentofCanada90DayTreasuryBillRateMember2019-12-310001232384trp:SeriesOnePreferredStockMembertrp:GovernmentofCanadaFiveYearBondYieldMember2019-12-310001232384trp:SeriesTwoPreferredStockMember2019-12-312019-12-310001232384trp:Series9PreferredStockMember2019-10-302019-10-300001232384trp:SeriesSixPreferredStockMember2019-01-012019-12-310001232384trp:SeriesTwoPreferredStockMember2019-01-012019-12-310001232384trp:SeriesThreePreferredStockMembertrp:GovernmentofCanadaFiveYearBondYieldMember2019-12-310001232384trp:Series9PreferredStockMembertrp:GovernmentofCanadaFiveYearBondYieldMember2019-12-310001232384trp:Series7PreferredStockMembertrp:GovernmentofCanadaFiveYearBondYieldMember2019-12-310001232384trp:Series8Membertrp:GovernmentofCanada90DayTreasuryBillRateMember2019-12-310001232384trp:Series10CumulativeRedeemablePreferredStockMembertrp:GovernmentofCanada90DayTreasuryBillRateMember2019-12-310001232384trp:PreferredCumulativeSharesSeries12Membertrp:GovernmentofCanada90DayTreasuryBillRateMember2018-12-310001232384trp:SeriesFourPreferredStockMember2015-12-312015-12-310001232384trp:SeriesTwoFourandSixPreferredStockMember2019-12-310001232384trp:SeriesSixteenPreferredStockMembertrp:GovernmentofCanada90DayTreasuryBillRateMember2019-12-310001232384trp:SeriesTwoPreferredStockMembertrp:GovernmentofCanada90DayTreasuryBillRateMember2019-12-310001232384trp:EvenNumberedSeriesofPreferredSharesMember2019-01-012019-12-310001232384trp:PreferredCumulativeSharesincludingSeries1Series3Series5Series7Series9Series11Series13andSeries15Member2019-01-012019-12-310001232384us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2018-01-012018-12-310001232384us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2018-01-012018-12-310001232384us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2017-12-310001232384us-gaap:AccumulatedTranslationAdjustmentMember2019-01-012019-12-310001232384us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2017-12-310001232384us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2017-01-012017-12-310001232384us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2019-01-012019-12-310001232384us-gaap:AccumulatedTranslationAdjustmentMember2017-01-012017-12-310001232384us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2016-12-310001232384us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2017-01-012017-12-310001232384us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2019-01-012019-12-310001232384us-gaap:AccumulatedTranslationAdjustmentMember2016-12-310001232384us-gaap:AccumulatedTranslationAdjustmentMember2018-01-012018-12-310001232384us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2018-12-310001232384us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2017-01-012017-12-310001232384us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2018-01-012018-12-310001232384us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2019-01-012019-12-310001232384us-gaap:AccumulatedTranslationAdjustmentMember2017-12-310001232384us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2019-12-310001232384us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2018-12-310001232384us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2016-12-310001232384us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2018-12-310001232384us-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2017-12-310001232384us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2016-12-310001232384us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2019-12-310001232384us-gaap:AccumulatedTranslationAdjustmentMember2018-12-310001232384us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2019-12-310001232384us-gaap:AccumulatedTranslationAdjustmentMember2019-12-310001232384us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossIncludingPortionAttributableToNoncontrollingInterestMember2018-01-012018-12-310001232384us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2018-01-012018-12-310001232384us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2018-01-012018-12-310001232384us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2018-01-012018-12-310001232384trp:AccumulatedNetGainLossfromInvestmentHedgesIncludingPortionAttributabletoNoncontrollingInterestMember2018-01-012018-12-310001232384us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2017-01-012017-12-310001232384us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2017-01-012017-12-310001232384us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2017-01-012017-12-310001232384us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossIncludingPortionAttributableToNoncontrollingInterestMember2017-01-012017-12-310001232384us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossIncludingPortionAttributableToNoncontrollingInterestMember2019-01-012019-12-310001232384trp:AccumulatedNetGainLossfromInvestmentHedgesIncludingPortionAttributabletoNoncontrollingInterestMember2019-01-012019-12-310001232384us-gaap:AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember2019-01-012019-12-310001232384us-gaap:AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember2019-01-012019-12-310001232384us-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2019-01-012019-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedTranslationAdjustmentMember2019-01-012019-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2019-01-012019-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2018-01-012018-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedTranslationAdjustmentMember2018-01-012018-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2018-01-012018-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2017-01-012017-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedTranslationAdjustmentMember2017-01-012017-12-310001232384us-gaap:InterestRateContractMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2017-01-012017-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2019-01-012019-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember2019-01-012019-12-310001232384trp:PowerandStorageSegmentMemberus-gaap:CommodityContractMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2019-01-012019-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMembertrp:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossAndNetPriorServiceAttributableToParentMember2018-01-012018-12-310001232384us-gaap:InterestRateContractMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2019-01-012019-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2018-01-012018-12-310001232384trp:PowerandStorageSegmentMemberus-gaap:CommodityContractMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2017-01-012017-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2017-01-012017-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMembertrp:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossAndNetPriorServiceAttributableToParentMember2017-01-012017-12-310001232384trp:PowerandStorageSegmentMemberus-gaap:CommodityContractMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2018-01-012018-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedDefinedBenefitPlansAdjustmentMember2017-01-012017-12-310001232384us-gaap:InterestRateContractMemberus-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2018-01-012018-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMembertrp:AccumulatedDefinedBenefitPlansAdjustmentNetSettlementChargesAttributableToParentMember2018-01-012018-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMembertrp:AccumulatedDefinedBenefitPlansAdjustmentNetGainLossAndNetPriorServiceAttributableToParentMember2019-01-012019-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMembertrp:AccumulatedDefinedBenefitPlansAdjustmentNetSettlementChargesAttributableToParentMember2017-01-012017-12-310001232384us-gaap:AccumulatedGainLossNetCashFlowHedgeNoncontrollingInterestMember2019-01-012019-12-310001232384us-gaap:AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterestMember2019-01-012019-12-310001232384us-gaap:AccumulatedNetInvestmentGainLossAttributableToNoncontrollingInterestMember2019-01-012019-12-310001232384us-gaap:AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterestMember2018-01-012018-12-310001232384us-gaap:AccumulatedNetInvestmentGainLossAttributableToNoncontrollingInterestMember2018-01-012018-12-310001232384us-gaap:AccumulatedGainLossNetCashFlowHedgeNoncontrollingInterestMember2017-01-012017-12-310001232384us-gaap:AccumulatedForeignCurrencyAdjustmentAttributableToNoncontrollingInterestMember2017-01-012017-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedNetInvestmentGainLossAttributableToNoncontrollingInterestMember2018-01-012018-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeNoncontrollingInterestMember2019-01-012019-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedNetInvestmentGainLossAttributableToNoncontrollingInterestMember2019-01-012019-12-310001232384us-gaap:AccumulatedGainLossNetCashFlowHedgeNoncontrollingInterestMember2018-01-012018-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedNetInvestmentGainLossAttributableToNoncontrollingInterestMember2017-01-012017-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeNoncontrollingInterestMember2018-01-012018-12-310001232384us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMemberus-gaap:AccumulatedGainLossNetCashFlowHedgeNoncontrollingInterestMember2017-01-012017-12-310001232384us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2019-12-310001232384country:USus-gaap:PensionPlansDefinedBenefitMember2017-01-012017-12-310001232384us-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384country:USus-gaap:PensionPlansDefinedBenefitMember2018-12-012018-12-310001232384us-gaap:PensionPlansDefinedBenefitMember2019-01-012019-12-310001232384country:CAus-gaap:PensionPlansDefinedBenefitMember2019-01-012019-12-310001232384country:CAus-gaap:PensionPlansDefinedBenefitMember2018-01-012018-12-310001232384country:CAus-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384country:CAus-gaap:PensionPlansDefinedBenefitMember2017-01-012017-12-310001232384us-gaap:PensionPlansDefinedBenefitMember2018-01-012018-12-310001232384us-gaap:PensionPlansDefinedBenefitMember2018-12-310001232384trp:FundsHeldonDepositMember2019-12-310001232384us-gaap:RealEstateInvestmentMember2018-12-310001232384trp:InfrastructureInvestmentsMember2019-12-310001232384trp:USStatesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:DebtSecurityCorporateCanadaMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:InfrastructureInvestmentsMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384us-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesInternationalMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384us-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:DebtSecurityGovernmentInternationalMember2018-12-310001232384trp:DebtSecurityCorporateCanadaMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:DebtSecurityGovernmentInternationalMember2019-12-310001232384trp:DebtSecurityCorporateInternationalMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesEmergingMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesEmergingMember2019-12-310001232384trp:FundsHeldonDepositMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesCanadaMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:DebtSecurityCorporateInternationalMember2018-12-310001232384trp:DebtSecurityCorporateInternationalMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanCanadianProvincialDebtSecuritiesMember2019-12-310001232384trp:InfrastructureInvestmentsMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384us-gaap:DomesticCorporateDebtSecuritiesMember2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesGlobalMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:USStatesDebtSecuritiesMember2019-12-310001232384trp:USStatesDebtSecuritiesMember2018-12-310001232384us-gaap:RealEstateInvestmentMember2019-12-310001232384trp:DefinedBenefitPlanCanadianMunicipalDebtSecuritiesMember2019-12-310001232384trp:DebtSecurityCorporateCanadaMember2019-12-310001232384trp:FundsHeldonDepositMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DebtSecurityCorporateInternationalMember2019-12-310001232384trp:CollateralizedMortgageBackedSecuritiesInternationalMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384us-gaap:DomesticCorporateDebtSecuritiesMember2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesCanadaMember2018-12-310001232384us-gaap:USTreasuryAndGovernmentMember2019-12-310001232384us-gaap:CashAndCashEquivalentsMember2019-12-310001232384trp:InfrastructureInvestmentsMember2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesCanadaMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:DefinedBenefitPlanCanadianProvincialDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:InfrastructureInvestmentsMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanCanadianMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:DefinedBenefitPlanCanadianMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DebtSecurityGovernmentInternationalMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesEmergingMember2018-12-310001232384us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384us-gaap:RealEstateInvestmentMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:CollateralizedMortgageBackedSecuritiesInternationalMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesCanadaMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:CollateralizedMortgageBackedSecuritiesInternationalMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:CollateralizedMortgageBackedSecuritiesInternationalMember2019-12-310001232384us-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesGlobalMember2019-12-310001232384trp:USStatesMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384us-gaap:RealEstateInvestmentMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:DefinedBenefitPlanCanadianFederalDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:CollateralizedMortgageBackedSecuritiesInternationalMember2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesInternationalMember2018-12-310001232384us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanCanadianFederalDebtSecuritiesMember2019-12-310001232384us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesInternationalMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:DefinedBenefitPlanCanadianProvincialDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384us-gaap:DomesticCorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384us-gaap:DomesticCorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:USStatesMunicipalDebtSecuritiesMember2019-12-310001232384us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:DefinedBenefitPlanCanadianFederalDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384us-gaap:RealEstateInvestmentMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384us-gaap:PrivateEquityFundsMember2018-12-310001232384us-gaap:DomesticCorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384us-gaap:PrivateEquityFundsMember2019-12-310001232384trp:CollateralizedMortgageBackedSecuritiesInternationalMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:FundsHeldonDepositMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:DebtSecurityGovernmentInternationalMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DebtSecurityGovernmentInternationalMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesCanadaMember2019-12-310001232384trp:DefinedBenefitPlanCanadianProvincialDebtSecuritiesMember2018-12-310001232384trp:USStatesDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesInternationalMember2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesGlobalMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesGlobalMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesInternationalMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:FundsHeldonDepositMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384us-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:USStatesMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DebtSecurityCorporateInternationalMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:FundsHeldonDepositMember2018-12-310001232384trp:DefinedBenefitPlanCanadianProvincialDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:USStatesMunicipalDebtSecuritiesMember2018-12-310001232384trp:DefinedBenefitPlanCanadianMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:USStatesMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:FundsHeldonDepositMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384us-gaap:CashAndCashEquivalentsMember2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesGlobalMember2018-12-310001232384trp:DefinedBenefitPlanCanadianFederalDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384us-gaap:DomesticCorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesInternationalMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:DebtSecurityGovernmentInternationalMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:DebtSecurityCorporateInternationalMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384us-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:DebtSecurityGovernmentInternationalMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:InfrastructureInvestmentsMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesInternationalMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:USStatesDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384us-gaap:RealEstateInvestmentMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:USStatesMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanCanadianProvincialDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:DefinedBenefitPlanCanadianMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:DefinedBenefitPlanCanadianProvincialDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DefinedBenefitPlanCanadianFederalDebtSecuritiesMember2018-12-310001232384us-gaap:USTreasuryAndGovernmentMember2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesEmergingMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesGlobalMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesEmergingMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:CollateralizedMortgageBackedSecuritiesInternationalMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:DefinedBenefitPlanCanadianProvincialDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DebtSecurityCorporateCanadaMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:DebtSecurityCorporateCanadaMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesGlobalMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanCanadianFederalDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:USStatesDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:DebtSecurityCorporateCanadaMember2018-12-310001232384us-gaap:DefinedBenefitPlanEquitySecuritiesUsMember2019-12-310001232384trp:DebtSecurityGovernmentInternationalMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:InfrastructureInvestmentsMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:USStatesDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanCanadianMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesEmergingMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesCanadaMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanCanadianMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:InfrastructureInvestmentsMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:USStatesMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384us-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DebtSecurityCorporateInternationalMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384us-gaap:FairValueInputsLevel3Member2019-12-310001232384us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DefinedBenefitPlanCanadianMunicipalDebtSecuritiesMember2018-12-310001232384trp:DebtSecurityCorporateCanadaMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesInternationalMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesEmergingMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesCanadaMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384us-gaap:CashAndCashEquivalentsMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384us-gaap:PrivateEquityFundsMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384us-gaap:DomesticCorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:FundsHeldonDepositMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384trp:DebtSecurityCorporateCanadaMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:USStatesDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesCanadaMemberus-gaap:FairValueInputsLevel3Member2018-12-310001232384us-gaap:DomesticCorporateDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384us-gaap:DefinedBenefitPlanEquitySecuritiesUsMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384trp:DefinedBenefitPlanCanadianFederalDebtSecuritiesMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:CollateralizedMortgageBackedSecuritiesInternationalMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesGlobalMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:DefinedBenefitPlanEquitySecuritiesEmergingMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:DefinedBenefitPlanCanadianFederalDebtSecuritiesMemberus-gaap:FairValueInputsLevel2Member2018-12-310001232384trp:USStatesMunicipalDebtSecuritiesMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384us-gaap:RealEstateInvestmentMemberus-gaap:FairValueInputsLevel1Member2019-12-310001232384us-gaap:USTreasuryAndGovernmentMemberus-gaap:FairValueInputsLevel2Member2019-12-310001232384trp:DebtSecurityCorporateInternationalMemberus-gaap:FairValueInputsLevel3Member2019-12-310001232384us-gaap:RealEstateInvestmentMemberus-gaap:FairValueInputsLevel1Member2018-12-310001232384us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2018-12-310001232384us-gaap:PensionPlansDefinedBenefitMember2017-01-012017-12-310001232384us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2018-01-012018-12-310001232384us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2019-01-012019-12-310001232384us-gaap:FairValueInputsLevel3Member2019-01-012019-12-310001232384us-gaap:FairValueInputsLevel3Member2018-01-012018-12-310001232384us-gaap:FairValueInputsLevel3Member2017-12-310001232384us-gaap:UnfundedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384us-gaap:UnfundedPlanMemberus-gaap:PensionPlansDefinedBenefitMember2018-12-310001232384us-gaap:OtherThanSecuritiesInvestmentMemberus-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384us-gaap:EquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2018-12-310001232384us-gaap:OtherThanSecuritiesInvestmentMemberus-gaap:PensionPlansDefinedBenefitMember2018-12-310001232384us-gaap:DebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2018-12-310001232384us-gaap:DebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384us-gaap:EquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384us-gaap:EquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2018-01-012018-12-310001232384us-gaap:DebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2018-01-012018-12-310001232384us-gaap:DebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2019-01-012019-12-310001232384us-gaap:EquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2019-01-012019-12-310001232384us-gaap:PensionPlansDefinedBenefitMember2017-12-310001232384us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2019-01-012019-12-310001232384us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2019-01-012019-12-310001232384us-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2017-12-310001232384us-gaap:UnfundedPlanMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2019-12-310001232384us-gaap:UnfundedPlanMemberus-gaap:OtherPostretirementBenefitPlansDefinedBenefitMember2018-12-310001232384srt:MinimumMemberus-gaap:EquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384srt:MinimumMemberus-gaap:OtherThanSecuritiesInvestmentMemberus-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384srt:MaximumMemberus-gaap:OtherThanSecuritiesInvestmentMemberus-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384srt:MaximumMemberus-gaap:EquitySecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384srt:MaximumMemberus-gaap:DebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384srt:MinimumMemberus-gaap:DebtSecuritiesMemberus-gaap:PensionPlansDefinedBenefitMember2019-12-310001232384us-gaap:InterestRateSwapMember2019-12-310001232384us-gaap:SalesMember2018-01-012018-12-310001232384us-gaap:InterestRateSwapMember2019-01-012019-12-310001232384trp:U.S.NortheastMerchantPowerAssetsMember2019-01-012019-12-310001232384us-gaap:SalesMember2019-01-012019-12-310001232384us-gaap:InterestRateSwapMember2018-01-012018-12-310001232384currency:USDus-gaap:CrossCurrencyInterestRateContractMemberus-gaap:NetInvestmentHedgingMember2019-01-012019-12-310001232384us-gaap:InterestRateSwapMember2018-12-310001232384currency:USDus-gaap:CrossCurrencyInterestRateContractMemberus-gaap:NetInvestmentHedgingMember2018-01-012018-12-310001232384us-gaap:CustomerConcentrationRiskMember2019-01-012019-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMember2018-12-310001232384us-gaap:InterestRateContractMember2018-12-310001232384us-gaap:ForeignExchangeContractMember2018-12-310001232384us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2018-12-310001232384us-gaap:FairValueInputsLevel2Memberus-gaap:CarryingReportedAmountFairValueDisclosureMember2018-12-310001232384us-gaap:FairValueInputsLevel2Memberus-gaap:CarryingReportedAmountFairValueDisclosureMember2019-12-310001232384us-gaap:FairValueInputsLevel2Memberus-gaap:EstimateOfFairValueFairValueDisclosureMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueHedgingMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMemberus-gaap:CommodityMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:InterestRateContractMember2019-12-310001232384us-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:FairValueHedgingMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMembertrp:TotalTradingActivityMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:FixedIncomeInterestRateMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:CommodityMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMember2019-12-310001232384trp:TotalTradingActivityMember2019-12-310001232384us-gaap:CashFlowHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:FairValueHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:CommodityMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:FairValueHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:ForeignExchangeContractMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:ForeignExchangeContractMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:InterestRateContractMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:CashFlowHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeMember2019-12-310001232384us-gaap:OtherCurrentAssetsMember2019-12-310001232384us-gaap:FairValueHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:InterestRateContractMemberus-gaap:FixedIncomeInterestRateMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeMember2019-12-310001232384us-gaap:OtherCurrentAssetsMembertrp:TotalTradingActivityMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueHedgingMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:InterestRateContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMembertrp:TotalTradingActivityMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:InterestRateContractMemberus-gaap:FixedIncomeInterestRateMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:InterestRateContractMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:FairValueHedgingMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMemberus-gaap:FairValueHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:FairValueHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:InterestRateContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:InterestRateContractMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:FairValueHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CashFlowHedgingMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:FixedIncomeInterestRateMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMembertrp:TotalTradingActivityMember2019-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMember2019-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:ForeignExchangeContractMember2019-12-310001232384trp:OtherRestrictedInvestmentsMember2017-01-012017-12-310001232384trp:LMCIRestrictedInvestmentsMember2017-01-012017-12-310001232384trp:OtherRestrictedInvestmentsMember2019-01-012019-12-310001232384trp:LMCIRestrictedInvestmentsMember2018-01-012018-12-310001232384trp:OtherRestrictedInvestmentsMember2018-01-012018-12-310001232384trp:LMCIRestrictedInvestmentsMember2019-01-012019-12-310001232384us-gaap:CrossCurrencyInterestRateContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384currency:USDus-gaap:ForeignExchangeOptionMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:ForeignExchangeOptionMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384currency:USDus-gaap:CrossCurrencyInterestRateContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384currency:USDus-gaap:NetInvestmentHedgingMember2019-12-310001232384us-gaap:ForeignExchangeOptionMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:CrossCurrencyInterestRateContractMemberus-gaap:NetInvestmentHedgingMember2019-12-310001232384currency:USDus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:NetInvestmentHedgingMember2018-12-310001232384currency:USDus-gaap:ForeignExchangeOptionMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384currency:USDus-gaap:CrossCurrencyInterestRateContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:FixedIncomeSecuritiesMembertrp:OtherRestrictedInvestmentsMember2018-12-310001232384us-gaap:FixedIncomeSecuritiesMembertrp:LMCIRestrictedInvestmentsMember2019-12-310001232384us-gaap:FixedIncomeSecuritiesMembertrp:LMCIRestrictedInvestmentsMember2018-12-310001232384trp:LMCIRestrictedInvestmentsMember2019-12-310001232384us-gaap:FixedIncomeSecuritiesMembertrp:OtherRestrictedInvestmentsMember2019-12-310001232384trp:LMCIRestrictedInvestmentsMember2018-12-310001232384trp:OtherRestrictedInvestmentsMember2018-12-310001232384trp:OtherRestrictedInvestmentsMember2019-12-310001232384us-gaap:CommodityContractMemberus-gaap:SalesMember2018-01-012018-12-310001232384us-gaap:InterestRateContractMemberus-gaap:InterestExpenseMember2019-01-012019-12-310001232384us-gaap:InterestRateContractMemberus-gaap:InterestExpenseMember2017-01-012017-12-310001232384us-gaap:InterestRateContractMemberus-gaap:InterestExpenseMember2018-01-012018-12-310001232384us-gaap:CommodityContractMemberus-gaap:SalesMember2017-01-012017-12-310001232384us-gaap:CommodityContractMemberus-gaap:SalesMember2019-01-012019-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2018-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:InterestRateContractMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:ForeignExchangeContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:ForeignExchangeContractMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:InterestRateContractMemberus-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:FairValueInputsLevel1Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:FairValueInputsLevel3Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:FairValueInputsLevel2Memberus-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:FairValueMeasurementsRecurringMember2019-12-310001232384us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2017-01-012017-12-310001232384us-gaap:InterestRateContractMember2017-01-012017-12-310001232384us-gaap:CommodityContractMember2017-01-012017-12-310001232384us-gaap:InterestRateContractMember2019-01-012019-12-310001232384us-gaap:CommodityContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2018-01-012018-12-310001232384us-gaap:ForeignExchangeContractMember2017-01-012017-12-310001232384us-gaap:CommodityContractMember2019-01-012019-12-310001232384us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2018-01-012018-12-310001232384us-gaap:CommodityContractMember2018-01-012018-12-310001232384us-gaap:InterestRateContractMember2018-01-012018-12-310001232384us-gaap:ForeignExchangeContractMember2018-01-012018-12-310001232384us-gaap:CommodityContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2017-01-012017-12-310001232384us-gaap:ForeignExchangeContractMember2019-01-012019-12-310001232384us-gaap:ForeignExchangeContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2019-01-012019-12-310001232384us-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2018-01-012018-12-310001232384us-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2019-01-012019-12-310001232384us-gaap:CommodityContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2019-01-012019-12-310001232384us-gaap:InterestRateContractMemberus-gaap:DesignatedAsHedgingInstrumentMember2017-01-012017-12-310001232384us-gaap:InterestRateContractMember2019-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMember2019-12-310001232384us-gaap:ForeignExchangeContractMember2019-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:CashFlowHedgingMember2019-01-012019-12-310001232384us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMember2018-01-012018-12-310001232384us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMember2019-01-012019-12-310001232384us-gaap:CashFlowHedgingMember2018-01-012018-12-310001232384us-gaap:CashFlowHedgingMember2019-01-012019-12-310001232384us-gaap:CashFlowHedgingMember2017-01-012017-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:CashFlowHedgingMember2017-01-012017-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:CashFlowHedgingMember2018-01-012018-12-310001232384us-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMember2017-01-012017-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:InterestRateContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:ForeignExchangeContractMember2018-12-310001232384us-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:ForeignExchangeContractMember2018-12-310001232384trp:TotalTradingActivityMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:CommodityContractMemberus-gaap:CommodityMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:InterestRateContractMember2018-12-310001232384us-gaap:OtherCurrentAssetsMembertrp:TotalTradingActivityMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:InterestRateContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:InterestRateContractMemberus-gaap:FixedIncomeInterestRateMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:CommodityContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:InterestRateContractMember2018-12-310001232384us-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:InterestRateContractMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:FixedIncomeInterestRateMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:InterestRateContractMemberus-gaap:FixedIncomeInterestRateMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:CommodityContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:FixedIncomeInterestRateMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:CommodityMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMemberus-gaap:CommodityMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:CommodityContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMembertrp:TotalTradingActivityMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMembertrp:TotalTradingActivityMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:CommodityContractMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CashFlowHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMembertrp:TotalTradingActivityMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:InterestRateContractMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:InterestRateContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:InterestRateContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:OtherCurrentAssetsMemberus-gaap:CommodityContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:ForeignExchangeContractMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:CashFlowHedgingMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:CommodityContractMemberus-gaap:CommodityMember2018-12-310001232384us-gaap:OtherNoncurrentLiabilitiesMemberus-gaap:NetInvestmentHedgingMember2018-12-310001232384trp:IntangiblesandOtherAssetsMemberus-gaap:ForeignExchangeContractMemberus-gaap:FairValueHedgingMember2018-12-310001232384us-gaap:AccountsPayableAndAccruedLiabilitiesMemberus-gaap:ForeignExchangeContractMemberus-gaap:ForeignExchangeMember2018-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:ShortMember2018-01-012018-12-310001232384trp:LiquidsMemberus-gaap:CommodityContractMemberus-gaap:ShortMember2018-01-012018-12-310001232384srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:LongMember2018-01-012018-12-310001232384trp:LiquidsMemberus-gaap:CommodityContractMemberus-gaap:LongMember2018-01-012018-12-310001232384srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:ShortMember2018-01-012018-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:LongMember2018-01-012018-12-310001232384trp:LiquidsMemberus-gaap:CommodityContractMemberus-gaap:ShortMember2019-01-012019-12-310001232384trp:LiquidsMemberus-gaap:CommodityContractMemberus-gaap:LongMember2019-01-012019-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:ShortMember2019-01-012019-12-310001232384srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:LongMember2019-01-012019-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMemberus-gaap:LongMember2019-01-012019-12-310001232384srt:NaturalGasReservesMemberus-gaap:CommodityContractMemberus-gaap:ShortMember2019-01-012019-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMember2018-01-012018-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMember2017-12-310001232384us-gaap:EnergyRelatedDerivativeMemberus-gaap:CommodityContractMember2019-01-012019-12-310001232384trp:LongTermDebtCurrentPortionMember2019-12-310001232384trp:LongTermDebtExcludingCurrentPortionMember2018-12-310001232384us-gaap:LongTermDebtMember2018-12-310001232384us-gaap:LongTermDebtMember2019-12-310001232384trp:LongTermDebtCurrentPortionMember2018-12-310001232384trp:LongTermDebtExcludingCurrentPortionMember2019-12-310001232384us-gaap:CustomerConcentrationRiskMember2018-01-012018-12-310001232384trp:U.S.NortheastMerchantPowerAssetsMember2018-01-012018-12-310001232384trp:U.S.NortheastMerchantPowerAssetsMember2017-01-012017-12-310001232384us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMembertrp:SaltRiverProjectAgricultureImprovementandPowerDistrictMember2019-05-212019-05-210001232384trp:PortlandNaturalGasTransmissionSystemMemberus-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember2017-06-012017-06-010001232384us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMembertrp:SaltRiverProjectAgricultureImprovementandPowerDistrictMember2019-05-210001232384trp:NorthernCourierMembertrp:LiquidsPipelinesSegmentMember2019-07-170001232384us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMembertrp:PNGTAndIroquoisTransmissionsystemsMember2017-06-010001232384trp:RavenswoodIronwoodKibbyWindandOceanStatePowerMember2017-01-012017-12-310001232384trp:ColumbiaMidstreamAssetsMember2019-08-012019-08-010001232384trp:NorthernCourierMembertrp:SeniorSecuredNotesDueJune2042Member2019-07-162019-07-160001232384us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMembertrp:CartierWindMember2018-10-242018-10-240001232384trp:TCHydroMember2018-01-012018-12-310001232384trp:OntarioSolarAssetsMember2017-12-192017-12-190001232384us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMembertrp:NorthernCourierMember2019-07-170001232384trp:IroquoisGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2017-06-010001232384trp:TCHydroMember2017-04-012017-04-300001232384trp:RavenswoodIronwoodKibbyWindandOceanStatePowerMember2016-01-012016-12-310001232384trp:ColumbiaMidstreamAssetsMember2019-08-010001232384trp:RavenswoodIronwoodKibbyWindandOceanStatePowerMember2017-06-022017-06-020001232384trp:IroquoisGasTransmissionSystemLPMemberus-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember2017-06-012017-06-010001232384trp:RavenswoodIronwoodKibbyWindandOceanStatePowerMember2016-01-012016-12-310001232384us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMembertrp:PNGTAndIroquoisTransmissionsystemsMember2017-06-012017-06-010001232384trp:IroquoisGasTransmissionSystemLPMembertrp:U.S.NaturalGasPipelinesMember2017-06-020001232384trp:TCHydroMember2017-04-192017-04-190001232384us-gaap:CapitalAdditionsMembertrp:PowerandStorageSegmentMember2019-01-012019-12-310001232384us-gaap:CapitalAdditionsMembertrp:LiquidsPipelinesSegmentMember2019-01-012019-12-310001232384us-gaap:CapitalAdditionsMembertrp:U.S.NaturalGasPipelinesMember2019-01-012019-12-310001232384us-gaap:CapitalAdditionsMembertrp:CanadianNaturalGasPipelinesMember2019-01-012019-12-310001232384us-gaap:CapitalAdditionsMembertrp:MexicoNaturalGasPipelinesMember2019-01-012019-12-310001232384trp:BrucePowerMemberus-gaap:PerformanceGuaranteeMember2019-12-310001232384trp:SurdeTexasTransmissionSystemMemberus-gaap:PerformanceGuaranteeMember2019-12-310001232384trp:OtherEquityMethodInvesteeMemberus-gaap:PerformanceGuaranteeMember2018-12-310001232384trp:OtherEquityMethodInvesteeMemberus-gaap:PerformanceGuaranteeMember2019-12-310001232384us-gaap:PerformanceGuaranteeMember2019-12-310001232384trp:NorthernCourierMemberus-gaap:PerformanceGuaranteeMember2018-12-310001232384us-gaap:PerformanceGuaranteeMember2018-12-310001232384trp:NorthernCourierMemberus-gaap:PerformanceGuaranteeMember2019-12-310001232384trp:BrucePowerMemberus-gaap:PerformanceGuaranteeMember2018-12-310001232384trp:SurdeTexasTransmissionSystemMemberus-gaap:PerformanceGuaranteeMember2018-12-310001232384us-gaap:ContractTerminationMember2018-01-012018-12-310001232384us-gaap:EmployeeSeveranceMember2017-12-310001232384us-gaap:ContractTerminationMember2019-12-310001232384us-gaap:EmployeeSeveranceMember2019-12-310001232384us-gaap:EmployeeSeveranceMember2018-01-012018-12-310001232384us-gaap:ContractTerminationMember2019-01-012019-12-310001232384us-gaap:EmployeeSeveranceMember2019-01-012019-12-310001232384us-gaap:EmployeeSeveranceMember2018-12-310001232384us-gaap:ContractTerminationMember2017-12-310001232384us-gaap:ContractTerminationMember2018-12-310001232384us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2018-12-310001232384us-gaap:VariableInterestEntityNotPrimaryBeneficiaryMember2019-12-310001232384us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2019-12-310001232384us-gaap:VariableInterestEntityPrimaryBeneficiaryMember2018-12-31xbrli:pureutreg:miiso4217:CADtrp:plantxbrli:sharesiso4217:CADxbrli:sharestrp:segmentutreg:kmutreg:Bcfiso4217:MXNiso4217:USDiso4217:USDxbrli:sharestrp:pipelineutreg:GWhutreg:MMBbls



U.S. Securities and Exchange Commission
Washington, D.C. 20549
Form 40-F
☐
REGISTRATION STATEMENT PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934
OR
☒
ANNUAL REPORT PURSUANT TO SECTION 13(a) OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2019
TC ENERGY CORPORATION
(Commission File Number 1-31690)

TRANSCANADA PIPELINES LIMITED
(Commission File Number 1-8887)
(Exact name of Registrant as specified in its charter)
Canada
(Province or other jurisdiction of incorporation or organization)
4922, 4923, 4924, 5172
(Primary Standard Industrial Classification Code Number (if applicable))
Not Applicable
(TC Energy Corporation)
(I.R.S. Employer Identification Number (if applicable))
52-2179728
(TransCanada PipeLines Limited)
(I.R.S. Employer Identification Number (if applicable))
TC Energy Tower, 450 - 1 Street S.W.
Calgary, Alberta, Canada, T2P 5H1
(403) 920-2000
(Address and telephone number of Registrant's principal executive offices)
TransCanada PipeLine USA Ltd., 700 Louisiana Street, Suite 700
Houston, Texas, 77002-2700; (832) 320-5201
(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:
Title of each class
Trading Symbol(s)
Name of each exchange on which registered
Common Shares (including Rights
under Shareholder Rights Plan) of
TC Energy Corporation
TRP
New York Stock Exchange

Securities registered or to be registered pursuant to Section 12(g) of the Act: None
Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act:
Debt Securities of TransCanada PipeLines Limited

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.
At December 31, 2019, 938,399,506 common shares;
14,577,184 Cumulative Redeemable First Preferred Shares, Series 1;
7,422,816 Cumulative Redeemable First Preferred Shares, Series 2;
8,533,405 Cumulative Redeemable First Preferred Shares, Series 3;
5,466,595 Cumulative Redeemable First Preferred Shares, Series 4;
12,714,261 Cumulative Redeemable First Preferred Shares, Series 5;
1,285,739 Cumulative Redeemable First Preferred Shares Series 6;
24,000,000 Cumulative Redeemable First Preferred Shares Series 7;
18,000,000 Cumulative Redeemable First Preferred Shares Series 9;
10,000,000 Cumulative Redeemable First Preferred Shares, Series 11;
20,000,000 Cumulative Redeemable First Preferred Shares, Series 13; and
40,000,000 Cumulative Redeemable First Preferred Shares, Series 15
of TC Energy Corporation were issued and outstanding.

At December 31, 2019, 902,108,711 common shares of TransCanada PipeLines Limited,
which were all owned by TC Energy Corporation, were issued and outstanding.

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 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 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.






The documents (or portions thereof) forming part of this Form 40-F are incorporated by reference into the following registration statements under the Securities Act of 1933, as amended:
Form
Registration No.
S-8
333-5916
S-8
333-8470
S-8
333-9130
S-8
333-151736
S-8
333-184074
S-8
333-227114
F-3
33-13564
F-3
333-6132
F-10
333-151781
F-10
333-161929
F-10
333-208585
F-10
333-214971
F-10
333-228848
F-10
333-235546


EXPLANATORY NOTE
TransCanada PipeLines Limited (“TransCanada PipeLines”) is a wholly owned subsidiary of TC Energy Corporation (formerly TransCanada Corporation) (“TC Energy”). As of the date of filing of this Form 40-F, TransCanada PipeLines is relying on the continuous disclosure documents filed by TC Energy pursuant to an exemption from the requirements of National Instrument 51-102 - Continuous Disclosure Obligations and as provided in the decision of the Alberta Securities Commission and the Ontario Securities Commission in Re TransCanada Corporation, 2019 ABASC 1, issued on January 3, 2019. Consistent with the exemptive relief, information contained in this Form 40-F is that provided by TC Energy except as indicated below.




AUDITED CONSOLIDATED ANNUAL FINANCIAL STATEMENTS AND
MANAGEMENT'S DISCUSSION & ANALYSIS
Except sections specifically referenced below which shall be deemed incorporated by reference herein and filed, no other portion of the TC Energy 2019 Management's discussion and analysis and audited consolidated financial statements to shareholders, except as otherwise specifically incorporated by reference in the TC Energy Annual information form, shall be deemed filed with the U.S. Securities and Exchange Commission (the "Commission") as part of this report under the Exchange Act.
A.    Audited Annual Financial Statements
For audited consolidated financial statements, including the auditors' report, see pages 108 through 186 of the TC Energy 2019 Management's discussion and analysis and audited consolidated financial statements included herein.
B.    Management's Discussion and Analysis
For management's discussion and analysis, see pages 5 through 106 of the TC Energy 2019 Management's discussion and analysis and audited consolidated financial statements included herein under the heading "Management's discussion and analysis".
C.    Management's Report on Internal Control Over Financial Reporting
For management's report on internal control over financial reporting, see "Management's Report on Internal Control over Financial Reporting" that accompanies the audited consolidated financial statements on page 107 of the TC Energy 2019 Management's discussion and analysis and audited consolidated financial statements included herein.
UNDERTAKING
Each Registrant undertakes to make available, in person or by telephone, representatives to respond to inquiries made by the Commission staff, and to furnish promptly, when requested to do so by the Commission staff, information relating to: the securities registered pursuant to Form 40-F; the securities in relation to which the obligation to file an annual report on Form 40-F arises; or transactions in said securities.
DISCLOSURE CONTROLS AND PROCEDURES AND INTERNAL CONTROL OVER FINANCIAL REPORTING
For information on disclosure controls and procedures and management's annual report on internal control over financial reporting, see "Other information - Controls and Procedures" in Management's discussion and analysis on page 93 of the TC Energy 2019 Management's discussion and analysis and audited consolidated financial statements.
AUDIT COMMITTEE FINANCIAL EXPERT
Each Registrant's Board of Directors has determined that it has at least one audit committee financial expert serving on its Audit committee. Mr. John E. Lowe, Ms. Una Power and Mr. Thierry Vandal have been designated audit committee financial experts and are independent, as that term is defined by the New York Stock Exchange's listing standards applicable to each Registrant. The Commission has indicated that the designation of Mr. Lowe, Ms. Power and Mr. Vandal as audit committee financial experts does not make Mr. Lowe, Ms. Power or Mr. Vandal "experts" for any purpose, impose any duties, obligations or liability on Mr. Lowe, Ms. Power or Mr. Vandal that are greater than those imposed on members of the Audit committee and Board of Directors who do not carry this designation or affect the duties, obligations or liability of any other member of the Audit committee.
CODE OF ETHICS
The Registrants have adopted a code of business ethics ("Code") for their directors, officers, employees and contractors. In 2019, the Code was updated with amendments for health, safety and the environment; accepting gifts, invitations and entertainment from suppliers; personal relationship disclosure; and protecting and using TC Energy's assets, as well as changes throughout related to TC Energy's renaming and rebranding.
The Registrants' Code is available on its website at www.tcenergy.com. No waivers have been granted from any provision of the Code during the 2019 fiscal year.
PRINCIPAL ACCOUNTANT FEES AND SERVICES
For information on principal accountant fees and services, see "Audit committee - Pre-approval Policies and Procedures" and "Audit committee - External Auditor Service Fees" on page 37 of the TC Energy Annual information form.
OFF-BALANCE SHEET ARRANGEMENTS
The Registrants have no off-balance sheet arrangements, as defined in this Form, other than the guarantees and commitments described in Note 28 of the Notes to the audited consolidated financial statements attached to this Form 40-F and incorporated herein by reference.




TABULAR DISCLOSURE OF CONTRACTUAL OBLIGATIONS
For information on tabular disclosure of contractual obligations, see "Financial Condition - Contractual obligations" in Management's discussion and analysis on page 79 of the TC Energy 2019 Management's discussion and analysis and audited consolidated financial statements.
IDENTIFICATION OF THE AUDIT COMMITTEE
Each Registrant has a separately-designated standing Audit committee. The members of each Audit committee as of February 12, 2020 (unless otherwise indicated) are:
Chair:
Members:
J.E. Lowe
S. Crétier
R. Limbacher
U. Power (as of May 3, 2019)
I. Samarasekera
T. Vandal
FORWARD-LOOKING INFORMATION
We disclose forward-looking information to help current and potential investors understand management's assessment of our future plans and financial outlook, and our future prospects overall.
Statements that are forward-looking are based on certain assumptions and on what we know and expect today and generally include words like anticipate, expect, believe, may, will, should, estimate or other similar words.
Forward-looking statements in this document include information about the following, among other things:
•
our financial and operational performance, including the performance of our subsidiaries
•
expectations about strategies and goals for growth and expansion
•
expected cash flows and future financing options available, including portfolio management
•
expected dividend growth
•
expected access to and cost of capital
•
expected costs and schedules for planned projects, including projects under construction and in development
•
expected capital expenditures, contractual obligations, commitments and contingent liabilities
•
expected regulatory processes and outcomes
•
expected outcomes with respect to legal proceedings, including arbitration and insurance claims
•
the expected impact of future tax and accounting changes
•
expected industry, market and economic conditions.
Forward-looking statements do not guarantee future performance. Actual events and results could be significantly different because of assumptions, risks or uncertainties related to our business or events that happen after the date of this document.
Our forward-looking information is based on the following key assumptions, and subject to the following risks and uncertainties:
Assumptions
•
regulatory decisions and outcomes
•
planned and unplanned outages and the use of our pipeline, power and storage assets
•
integrity and reliability of our assets
•
anticipated construction costs, schedules and completion dates
•
access to capital markets, including portfolio management
•
expected industry, market and economic conditions
•
inflation rates and commodity prices
•
interest, tax and foreign exchange rates
•
nature and scope of hedging.





Risks and uncertainties
•
our ability to successfully implement our strategic priorities and whether they will yield the expected benefits
•
our ability to implement a capital allocation strategy aligned with maximizing shareholder value
•
the operating performance of our pipeline, power and storage assets
•
amount of capacity sold and rates achieved in our pipeline businesses
•
the amount of capacity payments and revenues from our power generation assets due to plant availability
•
production levels within supply basins
•
construction and completion of capital projects
•
costs for labour, equipment and materials
•
the availability and market prices of commodities
•
access to capital markets on competitive terms
•
interest, tax and foreign exchange rates
•
performance and credit risk of our counterparties
•
regulatory decisions and outcomes of legal proceedings, including arbitration and insurance claims
•
our ability to effectively anticipate and assess changes to government policies and regulations, including those related to the environment
•
competition in the businesses in which we operate
•
unexpected or unusual weather
•
acts of civil disobedience
•
cyber security and technological developments
•
economic conditions in North America as well as globally.
You can read more about these factors and others in reports we have filed with Canadian securities regulators and the Commission.
As actual results could vary significantly from the forward-looking information, you should not put undue reliance on forward-looking information and should not use future-oriented information or financial outlooks for anything other than their intended purpose. We do not update our forward-looking statements due to new information or future events, unless we are required to by law.










DOCUMENTS FILED AS PART OF THIS REPORT
EXHIBITS
 
 
13.1
TC Energy Corporation Annual information form for the year ended December 31, 2019.
 
 
13.2
Management's discussion and analysis (included on pages 5 through 106 of the TC Energy Corporation 2019 Management's discussion and analysis and audited consolidated financial statements to shareholders).
 
 
13.3
2019 Audited consolidated financial statements (included on pages 107 through 186 of the TC Energy Corporation 2019 Management's discussion and analysis and audited consolidated financial statements to shareholders), including the Report of Independent Registered Public Accounting Firm on the Consolidated Financial Statements and the Report of Independent Registered Public Accounting Firm on the effectiveness of TC Energy's internal control over financial reporting as of December 31, 2019.
 
 
23.1
Consent of KPMG LLP, Chartered Professional Accountants, Independent Registered Public Accounting Firm.
 
 
31.1
Certification of Chief Executive Officer regarding Periodic Report containing Financial Statements.
 
 
31.2
Certification of Chief Financial Officer regarding Periodic Report containing Financial Statements.
 
 
32.1
Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
 
 
32.2
Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
 
 
99.1
A copy of TC Energy Corporation's Code of Business Ethics Policy, as amended and filed with the Securities and Exchange Commission as part of a Form 6-K report on December 20, 2019, and incorporated by reference herein.
 
 
101.SCH
Inline XBRL Taxonomy Extension Schema Document.
 
 
101.CAL
Inline XBRL Taxonomy Extension Calculation Linkbase Document.
 
 
101.DEF
Inline XBRL Taxonomy Definition Linkbase Document.
 
 
101.LAB
Inline XBRL Taxonomy Extension Label Linkbase Document.
 
 
101.PRE
Inline XBRL Taxonomy Extension Presentation Linkbase Document.
 
 
104
Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).




SIGNATURES
Pursuant to the requirements of the Exchange Act, each Registrant certifies that it meets all of the requirements for filing on Form 40-F and has duly caused this annual report to be signed on its behalf by the undersigned, thereto duly authorized, in the City of Calgary, Province of Alberta, Canada.
 
TC ENERGY CORPORATION
 
TRANSCANADA PIPELINES LIMITED
 
(Registrants)
 
 
 
 
By:
/s/ DONALD R. MARCHAND
 
 
DONALD R. MARCHAND
Executive Vice-President, Strategy & Corporate Development and
Chief Financial Officer
 
 
 
 
 
Date: February 13, 2020

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

DISCLAIMER

CompaniesMarketCap is not associated in any way with CoinMarketCap.com
Stock prices are delayed, the delay can range from a few minutes to several hours.
Company logos are from the CompaniesLogo.com logo database and belong to their respective copyright holders. Companies Marketcap displays them for editorial purposes only.

Contact

For inquiries or if you want to report a problem write to hello@8marketcap.com

Links

- Privacy policy

- Terms and conditions

© 2025 CompaniesMarketcap.com