Debt Obligations - Summary Of Debt Obligations (Parenthetical) (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
		Apr. 30, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2022	Sep. 29, 2022	Apr. 30, 2022	Feb. 28, 2021	Aug. 31, 2020
Debt Instrument [Line Items]
Proceeds from borrowings under accounts receivable securitization facility			$ 1,230.0	$ 630.0	$ 576.4
Partnership accounts receivable securitization facility, due September 2023	[1]		$ 800.0	$ 150.0
Senior Unsecured 4¼% Notes due November 2023 [Member]
Debt Instrument [Line Items]
Maturity date		May 31, 2021
Interest rate on fixed rate debt		4.25%
Senior Unsecured 4.875% Notes due February 2031 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt										4.875%
Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Maturity date			Sep. 01, 2023
Proceeds from borrowings under accounts receivable securitization facility			$ 800.0
Partnership accounts receivable securitization facility, due September 2023			800.0
Remaining borrowing capacity			0.0
Maximum borrowing capacity			$ 800.0
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
Remaining borrowing capacity			$ 290.0
Revolving Credit Facility [Member] | Commercial Paper Program [Member]
Debt Instrument [Line Items]
Remaining borrowing capacity			1,000.0
Revolving Credit Facility [Member] | Letters of Credit [Member]
Debt Instrument [Line Items]
Remaining borrowing capacity			$ 1,400.0
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 5.875% Notes due April 2026 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt								5.875%
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			5.20%	5.20%
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 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] | Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Maturity date			Sep. 01, 2023
Maximum borrowing capacity						$ 800.0	$ 400.0
Targa Resources Partners LP [Member] | Targa Pipeline Partners L P | Senior Unsecured 5 7/8% Notes due August 2023 [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 September 2023 [Member]
Debt Instrument [Line Items]
Maturity date			Sep. 01, 2023	Sep. 01, 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%
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%
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 4.875% 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 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 4.000% 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, 2022, the Partnership had $800.0 million of qualifying receivables under its $800.0 million Securitization Facility, resulting in zero availability.