XML 78 R59.htm IDEA: XBRL DOCUMENT
v3.20.4

Joint Ventures and Divestitures - Additional Information Divestitures (Details) - USD ($) $ in Millions |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2018 | Oct. 31, 2020 | Apr. 30, 2019 | Feb. 28, 2019 | May 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 01, 2019 | Feb. 06, 2018
Assets And Liabilities Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |
(Gain) loss on sale or disposition of business and assets |  |  |  |  |  | $ 58.4 | $ 71.1 | $ (0.1) |  |
Fractionation-related infrastructure funded and owned percentage |  |  |  |  |  |  |  |  |  | 100.00%
Sale price of Delaware crude system |  |  |  |  |  |  |  |  | $ 134.0 |
Proceeds from sale of business and assets |  |  |  |  |  | $ 198.7 | 14.8 | 256.9 |  |
Train 7 Joint Venture [Member] | Fractionation Related Infrastructure [Member] | Targa Resources Corp [Member] |  |  |  |  |  |  |  |  |  |
Assets And Liabilities Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |
Fractionation-related infrastructure funded and owned percentage |  |  |  | 100.00% |  |  |  |  |  |
Versado Gathering System [Member] |  |  |  |  |  |  |  |  |  |
Assets And Liabilities Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |
(Gain) loss on sale or disposition of business and assets |  |  |  |  |  |  |  | (44.4) |  |
Other Operating Income (Expense) [Member] |  |  |  |  |  |  |  |  |  |
Assets And Liabilities Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale or disposal of assets |  |  |  |  |  |  | $ (59.5) |  |  |
Targa Badlands LLC [Member] |  |  |  |  |  |  |  |  |  |
Assets And Liabilities Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |
Option to purchase equity interest percentage |  |  | 7.50% |  |  |  |  |  |  |
Subsidiary ownership interest sale percentage |  |  | 45.00% |  |  |  |  |  |  |
Consideration received on sale of interest on subsidiary |  |  | $ 1,600.0 |  |  |  |  |  |  |
Channelview, Texas [Member] |  |  |  |  |  |  |  |  |  |
Assets And Liabilities Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from sale of business and assets |  | $ 58.0 |  |  |  |  |  |  |  |
Channelview, Texas [Member] | Other Operating Income (Expense) [Member] |  |  |  |  |  |  |  |  |  |
Assets And Liabilities Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |
(Gain) loss on sale or disposition of business and assets |  | $ 58.3 |  |  |  |  |  |  |  |
Refined Products And Crude Oil Storage And Terminaling Facilities [Member] | Tacoma, Washington and Baltimore, Maryland [Member] |  |  |  |  |  |  |  |  |  |
Assets And Liabilities Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from sale of property | $ 165.0 |  |  |  |  |  |  |  |  |
Refined Products And Crude Oil Storage And Terminaling Facilities [Member] | Tacoma, Washington and Baltimore, Maryland [Member] | Other Operating Income (Expense) [Member] |  |  |  |  |  |  |  |  |  |
Assets And Liabilities Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale or disposal of assets | $ (59.1) |  |  |  |  |  |  |  |  |
Train 7 [Member] |  |  |  |  |  |  |  |  |  |
Assets And Liabilities Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |
Option to purchase equity interest percentage |  |  |  | 20.00% |  |  |  |  |  |
Logistics and Transportation [Member] |  |  |  |  |  |  |  |  |  |
Assets And Liabilities Held For Sale [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from sale of property |  |  |  |  | $ 69.3 |  |  |  |  |
Gain Loss On Sale Of Business |  |  |  |  |  |  |  | $ 48.1 |  |

X
- Definition Assets and liabilities held for sale. + References No definition available. + Details
Name: | trgp_AssetsAndLiabilitiesHeldForSaleLineItems
Namespace Prefix: | trgp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fractionation-related infrastructure funded and owned percentage. + References No definition available. + Details
Name: | trgp_FractionationRelatedInfrastructureFundedAndOwnedPercentage
Namespace Prefix: | trgp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Option to purchase equity interest percentage. + References No definition available. + Details
Name: | trgp_OptionToPurchaseEquityInterestPercentage
Namespace Prefix: | trgp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sale price of Delaware crude system. + References No definition available. + Details
Name: | trgp_SalePriceOfDelawareCrudeSystem
Namespace Prefix: | trgp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The selling price of property, plant, and equipment. + References No definition available. + Details
Name: | trgp_SellingPriceOfInlandMarineBargeBusiness
Namespace Prefix: | trgp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Subsidiary ownership interest sale percentage. + References No definition available. + Details
Name: | trgp_SubsidiaryOwnershipInterestSalePercentage
Namespace Prefix: | trgp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnDispositionOfAssets1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684 + Details
Name: | us-gaap_GainLossOnSaleOfBusiness
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of oil and gas property or timber property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnSaleOfProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or the sale of investment in consolidated subsidiaries (generally greater than 50 percent). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfProductiveAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=trgp_TrainSevenJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=trgp_FractionationRelatedInfrastructureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=trgp_TargaResourcesCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=trgp_VersadoGatheringSystemMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OtherOperatingIncomeExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=trgp_TargaBadlandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=trgp_ChannelviewTexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=trgp_RefinedProductsCrudeOilStorageAndTerminalingFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=trgp_TacomaWashingtonAndBaltimoreMarylandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=trgp_TrainSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=trgp_LogisticsAndTransportationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |