Amount paid for premium on extinguishment of debt.

No definition available.

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Namespace Prefix:	trgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Debt instrument redemption price per share.

+ References

No definition available.

+ Details

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Namespace Prefix:	trgp_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum combined aggregate redemption price exclusive of accrued and unpaid interest.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Balance Type:	na
Period Type:	instant

- 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

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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Balance Type:	na
Period Type:	duration

- Definition

Description of debt redemption features under terms of the debt agreement.

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- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Balance Type:	credit
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- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

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- Details

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Debt Obligations - Senior Unsecured Notes Redemptions and Issuance - Additional Information (Details) - Senior Unsecured Notes [Member] - USD ($)	1 Months Ended		3 Months Ended	6 Months Ended	12 Months Ended
	Apr. 30, 2022	Mar. 31, 2022	Mar. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Senior Unsecured 5.375% Notes due February 2027 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt		5.375%	5.375%
Maturity date		Mar. 31, 2022
Redemption description			In March 2022, the Partnership redeemed all of the outstanding 5.375% Notes at a redemption price equal to $1,026.88 for each $1,000 principal amount of 5.375% Notes redeemed, plus accrued and unpaid interest to, but not including, March 30, 2022, or a maximum combined aggregate redemption price (exclusive of accrued and unpaid interest) of $480.7 million. The 5.375% Notes were redeemed with available liquidity under the TRGP Revolver.
Redemption price per share		$ 1,026.88
Redemption of principal amount		$ 1,000	$ 1,000
Maximum combined aggregate redemption price exclusive of accrued and unpaid interest		480,700,000
Gain (loss) due to debt extinguishments		(15,000,000.0)
Premium Paid		12,600,000
Write-off debt issuance cost		$ 2,400,000
Senior Unsecured 4.200% Notes due February 2033 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt	4.20%			4.20%	4.20%
Maturity date				Feb. 28, 2033	Feb. 28, 2033
Aggregate principal amount issued	$ 750,000,000.0
Senior Unsecured 4.950% Notes due April 2052 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt	4.95%			4.95%	4.95%
Maturity date				Apr. 30, 2052	Apr. 30, 2052
Aggregate principal amount issued	$ 750,000,000.0
Net proceeds from registered offering of notes	$ 1,500,000,000
Senior Unsecured 5.875% Notes due April 2026 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt	5.875%
Gain (loss) due to debt extinguishments	$ 33,800,000
Premium Paid	29,300,000
Write-off debt issuance cost	$ 4,500,000