Debt Obligations - Summary Of Debt Obligations (Parenthetical) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Nov. 30, 2023	Aug. 30, 2023	Aug. 29, 2023	Jan. 31, 2023	Apr. 30, 2022	Feb. 28, 2021
Debt Instrument [Line Items]
Proceeds from borrowings under accounts receivable securitization facility		$ 143,100,000	$ 1,230,000,000	$ 630,000,000.0
Partnership accounts receivable securitization facility, due August 2024	[1]	$ 575,000,000	$ 800,000,000
Senior Unsecured 6.150% Fixed Rate, due March 2029 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt					6.15%
Senior Unsecured 6.500% Fixed Rate, due March 2034 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt					6.50%
Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Maturity date		Aug. 29, 2024
Proceeds from borrowings under accounts receivable securitization facility		$ 575,000,000
Partnership accounts receivable securitization facility, due August 2024		600,000,000
Remaining liquidity needs		25,000,000				$ 600,000,000	$ 800,000,000
Maximum borrowing capacity		$ 600,000,000
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
Remaining liquidity needs		$ 0
Revolving Credit Facility [Member] | Commercial Paper Program [Member]
Debt Instrument [Line Items]
Remaining liquidity needs		175,000,000
Revolving Credit Facility [Member] | Letters of Credit [Member]
Debt Instrument [Line Items]
Remaining liquidity needs		$ 2,600,000,000
Term Loan Facility, Variable Rate, due July 2025
Debt Instrument [Line Items]
Maturity date		Jul. 31, 2025	Jul. 31, 2025
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt									4.20%	5.125%
Senior Unsecured Notes [Member] | Senior Unsecured 5.200% Fixed Rate, due July 2027 [Member]
Debt Instrument [Line Items]
Maturity date		Jul. 31, 2027	Jul. 31, 2027
Interest rate on fixed rate debt		5.20%	5.20%
Senior Unsecured Notes [Member] | Senior Unsecured 6.150% Fixed Rate, due March 2029 [Member]
Debt Instrument [Line Items]
Maturity date		Mar. 31, 2029	Mar. 31, 2029
Interest rate on fixed rate debt		6.15%	6.15%		6.15%
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%
Senior Unsecured Notes [Member] | Senior Unsecured 6.125% Fixed Rate, due March 2033 [Member]
Debt Instrument [Line Items]
Maturity date		Mar. 31, 2033	Mar. 31, 2033
Interest rate on fixed rate debt		6.125%	6.125%					6.125%
Senior Unsecured Notes [Member] | Senior Unsecured 6.500% Fixed Rate, due March 2034 [Member]
Debt Instrument [Line Items]
Maturity date		Mar. 31, 2034	Mar. 31, 2034
Interest rate on fixed rate debt		6.50%	6.50%		6.50%
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%
Senior Unsecured Notes [Member] | Senior Unsecured 6.250% fixed rate, due July 2052 [Member]
Debt Instrument [Line Items]
Maturity date		Jul. 31, 2052	Jul. 31, 2052
Interest rate on fixed rate debt		6.25%	6.25%
Senior Unsecured Notes [Member] | Senior Unsecured 6.500% Fixed Rate, due February 2053 [Member]
Debt Instrument [Line Items]
Maturity date		Feb. 28, 2053	Feb. 28, 2053
Interest rate on fixed rate debt		6.50%	6.50%					6.50%
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%
Targa Resources Partners LP [Member] | Accounts Receivable Securitization Facility [Member] | Accounts Receivable Securitization Facility, due August 2024 [Member]
Debt Instrument [Line Items]
Maturity date		Aug. 31, 2024	Aug. 31, 2024
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 6.500% Fixed Rate, 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 of 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 of 5.500% Senior 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 4.875% 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%
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%

[1] As of December 31, 2023, the Partnership had $575.0 million of qualifying receivables under its $600.0 million accounts receivable securitization facility (the “Securitization Facility”), resulting in $25.0 million of availability.