Debt Obligations - Summary Of Debt Obligations (Parenthetical) (Details) - USD ($)		1 Months Ended	3 Months Ended		12 Months Ended
		Jan. 31, 2023	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Debt Instrument [Line Items]
Proceeds from borrowings under accounts receivable securitization facility			$ 0	$ 250,000,000.0
Partnership accounts receivable securitization facility, due September 2023	[1]		704,000,000.0		$ 800,000,000.0
Commercial Paper Program [Member]
Debt Instrument [Line Items]
Aggregate principal amount issued			2,750,000,000
Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Proceeds from borrowings under accounts receivable securitization facility			704,000,000.0
Remaining borrowing capacity			$ 800,000,000
Term Loan Facility, Variable Rate, due July 2025
Debt Instrument [Line Items]
Maturity date			Jul. 31, 2025		Jul. 31, 2025
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 borrowing capacity			$ 0
Revolving Credit Facility [Member] | Commercial Paper Program [Member]
Debt Instrument [Line Items]
Remaining borrowing capacity			305,000,000.0
Revolving Credit Facility [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Remaining borrowing capacity			$ 2,400,000,000
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Net proceeds from senior notes		$ 1,700,000,000
Senior Unsecured Notes [Member] | Senior Unsecured 4.200% Notes due February 2033 [Member]
Debt Instrument [Line Items]
Maturity date			Feb. 28, 2033		Feb. 28, 2023
Interest rate on fixed rate debt			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%
Aggregate principal amount issued		$ 900,000,000.0
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 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%
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%
Aggregate principal amount issued		$ 850,000,000.0
Targa Resources Partners LP [Member] | Accounts Receivable Securitization Facility [Member] | Accounts Receivable Securitization Facility, due September 2023 [Member]
Debt Instrument [Line Items]
Maturity date			Sep. 30, 2023		Sep. 30, 2023
Targa Resources Partners LP [Member] | 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			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 5.500% 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] The Partnership's accounts receivable securitization facility (the “Securitization Facility”) provides up to $800 million of borrowing capacity. As of March 31, 2023, the Partnership had $704.0 million of qualifying receivables.