XML 91 R72.htm IDEA: XBRL DOCUMENT
v3.20.4

Debt Obligations - Partnership's Revolving Credit Facility - Additional Information (Details) - TRP Revolver [Member] |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 01, 2020 | Feb. 17, 2016 | Jun. 29, 2019 | Dec. 31, 2020 USD ($) | Jun. 30, 2020
Debt Instrument [Line Items] |  |  |  |  |
Maturity date |  |  |  | Jun. 30, 2023 |
Maximum borrowing capacity |  |  |  | $ 2,200,000,000 |
Line Of Credit Additional Commitment Increase Available Upon Request |  |  |  | $ 500,000,000.0 |
First Amendment [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum percentage of consolidated EBITDA | 20.00% |  | 20.00% |  | 30.00%
Federal Funds Rate [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  |  |  | 0.50% |
London Interbank Offered Rate (LIBOR) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.00% |
Minimum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Commitment fee percentage |  |  |  | 0.25% |
Leverage ratio before collateral release date |  |  |  | 1.00 |
Leverage ratio upon and after collateral release date |  | 1.00 |  | 1.00 |
Interest coverage ratio |  |  |  | 1.00 |
Minimum [Member] | Letters of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on fixed rate debt |  |  |  | 1.25% |
Minimum [Member] | Non-Credit-Enhanced Senior Unsecured Long-Term Debt Ratings [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Commitment fee percentage |  |  |  | 0.125% |
Minimum [Member] | Non-Credit-Enhanced Senior Unsecured Long-Term Debt Ratings [Member] | Letters of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on fixed rate debt |  |  |  | 1.125% |
Minimum [Member] | Base Rate [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  |  |  | 0.25% |
Minimum [Member] | Base Rate [Member] | Non-Credit-Enhanced Senior Unsecured Long-Term Debt Ratings [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  |  |  | 0.125% |
Minimum [Member] | Eurodollar [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.25% |
Minimum [Member] | Eurodollar [Member] | Non-Credit-Enhanced Senior Unsecured Long-Term Debt Ratings [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.125% |
Maximum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Commitment fee percentage |  |  |  | 0.375% |
Leverage ratio before collateral release date |  |  |  | 5.50 |
Leverage ratio upon and after collateral release date |  | 5.50 |  | 5.25 |
Interest coverage ratio |  |  |  | 2.25 |
Aggregate principal amount issued |  |  |  | $ 400,000,000 |
Maximum [Member] | Letters of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on fixed rate debt |  |  |  | 2.25% |
Maximum [Member] | Non-Credit-Enhanced Senior Unsecured Long-Term Debt Ratings [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Commitment fee percentage |  |  |  | 0.35% |
Maximum [Member] | Non-Credit-Enhanced Senior Unsecured Long-Term Debt Ratings [Member] | Letters of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on fixed rate debt |  |  |  | 1.75% |
Maximum [Member] | Base Rate [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.25% |
Maximum [Member] | Base Rate [Member] | Non-Credit-Enhanced Senior Unsecured Long-Term Debt Ratings [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  |  |  | 0.75% |
Maximum [Member] | Eurodollar [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  |  |  | 2.25% |
Maximum [Member] | Eurodollar [Member] | Non-Credit-Enhanced Senior Unsecured Long-Term Debt Ratings [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.75% |

X
- Definition Interest coverage ratio. + References No definition available. + Details
Name: | trgp_InterestCoverageRatio
Namespace Prefix: | trgp_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Leverage ratio before collateral release date. + References No definition available. + Details
Name: | trgp_LeverageRatioBeforeCollateralReleaseDate
Namespace Prefix: | trgp_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Leverage ratio upon and after collateral release date. + References No definition available. + Details
Name: | trgp_LeverageRatioUponAndAfterCollateralReleaseDate
Namespace Prefix: | trgp_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition The additional commitment increase under the credit facility available upon request. + References No definition available. + Details
Name: | trgp_LineOfCreditAdditionalCommitmentIncreaseAvailableUponRequest
Namespace Prefix: | trgp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum percentage of consolidated EBITDA. + References No definition available. + Details
Name: | trgp_MaximumPercentageOfConsolidatedEBITDA
Namespace Prefix: | trgp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=trgp_TRPRevolverMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=trgp_FirstAmendmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=trgp_FederalFundsRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=trgp_NonCreditEnhancedSeniorUnsecuredLongTermDebtRatingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_EurodollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |