Debt Obligations - Summary Of Debt Obligations (Parenthetical) (Details) - USD ($)		1 Months Ended			6 Months Ended		12 Months Ended
		Jul. 31, 2022	Apr. 30, 2022	Mar. 31, 2022	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Feb. 28, 2022
Debt Instrument [Line Items]
Proceeds from borrowings under accounts receivable securitization facility					$ 380,000,000.0	$ 530,000,000.0
Partnership accounts receivable securitization facility, due April 2023	[1]				400,000,000.0		$ 150,000,000.0
Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Proceeds from borrowings under accounts receivable securitization facility					400,000,000.0
Partnership accounts receivable securitization facility, due April 2023					400,000,000.0
Remaining borrowing capacity					$ 0
Revolving Credit Facility [Member] | TRGP Senior Revolving Credit Facility due February 2027 [Member]
Debt Instrument [Line Items]
Maturity date					Feb. 28, 2027		Feb. 28, 2027
Revolving Credit Facility [Member] | TRC Senior Revolving Credit Facility Due February 2027 [Member]
Debt Instrument [Line Items]
Remaining borrowing capacity					$ 2,200,000,000
Maximum borrowing capacity								$ 2,750,000,000
Senior Unsecured Notes [Member] | Senior Unsecured 4.200% Notes due February 2033 [Member]
Debt Instrument [Line Items]
Maturity date					Feb. 28, 2033		Feb. 28, 2033
Interest rate on fixed rate debt			4.20%		4.20%		4.20%
Aggregate principal amount issued			$ 750,000,000.0
Senior Unsecured Notes [Member] | Senior Unsecured 4.950% Notes due April 2052 [Member]
Debt Instrument [Line Items]
Maturity date					Apr. 30, 2052		Apr. 30, 2052
Interest rate on fixed rate debt			4.95%		4.95%		4.95%
Aggregate principal amount issued			$ 750,000,000.0
Net proceeds from private placement of notes			$ 1,500,000,000
Senior Unsecured Notes [Member] | Senior Unsecured 5.875% Notes due April 2026 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt			5.875%
Senior Unsecured Notes [Member] | Senior Unsecured 5.375% Notes due February 2027 [Member]
Debt Instrument [Line Items]
Maturity date				Mar. 31, 2022
Interest rate on fixed rate debt				5.375%
Senior Unsecured Notes [Member] | 5.200% Senior Notes due 2027 [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt		5.20%
Aggregate principal amount issued		$ 750,000,000.0
Senior Unsecured Notes [Member] | 6.250% Senior Notes due 2052 [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt		6.25%
Aggregate principal amount issued		$ 500,000,000.0
Net proceeds from private placement of notes		$ 1,200,000,000
Targa Resources Partners LP [Member] | Accounts Receivable Securitization Facility [Member] | Accounts Receivable Securitization Facility, Due April 2022 [Member]
Debt Instrument [Line Items]
Maturity date					Apr. 30, 2023		Apr. 30, 2023
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 5.875% Notes due April 2026 [Member]
Debt Instrument [Line Items]
Maturity date					Apr. 30, 2026		Apr. 30, 2026
Interest rate on fixed rate debt			5.875%		5.875%		5.875%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 6.500% Notes due July 2027 [Member]
Debt Instrument [Line Items]
Maturity date					Jul. 31, 2027		Jul. 31, 2027
Interest rate on fixed rate debt					6.50%		6.50%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 5.000% Notes due January 2028 [Member]
Debt Instrument [Line Items]
Maturity date					Jan. 31, 2028		Jan. 31, 2028
Interest rate on fixed rate debt					5.00%		5.00%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 6.875% Senior Notes due January 2029 [Member]
Debt Instrument [Line Items]
Maturity date					Jan. 31, 2029		Jan. 31, 2029
Interest rate on fixed rate debt					6.875%		6.875%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 5.375% Notes due February 2027 [Member]
Debt Instrument [Line Items]
Maturity date					Feb. 28, 2027		Feb. 28, 2027
Interest rate on fixed rate debt				5.375%	5.375%		5.375%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 5.500% Notes due March 2030 [Member]
Debt Instrument [Line Items]
Maturity date					Mar. 31, 2030		Mar. 31, 2030
Interest rate on fixed rate debt					5.50%		5.50%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured of 4.000% Senior Notes due January 2032 [Member]
Debt Instrument [Line Items]
Maturity date					Jan. 31, 2032		Jan. 31, 2032
Interest rate on fixed rate debt					4.00%		4.00%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured of 4.875% Senior Notes due February 2031 [Member]
Debt Instrument [Line Items]
Maturity date					Feb. 28, 2031		Feb. 28, 2031
Interest rate on fixed rate debt					4.875%		4.875%

[1] As of June 30, 2022, the Partnership had $400.0 million of qualifying receivables under its $400.0 million accounts receivable securitization facility (“Securitization Facility”), resulting in zero availability.