Debt Obligations - Debt Repurchases & Extinguishments - Additional Information (Details) - USD ($)	1 Months Ended						12 Months Ended
	Nov. 30, 2023	Jan. 31, 2023	Jul. 31, 2022	Feb. 28, 2022	Apr. 30, 2021	Feb. 28, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Apr. 30, 2022
Debt Instrument [Line Items]
Write-off debt issuance cost						$ 2,400,000
Gain (loss) from financing activities							$ (2,100,000)	$ (49,600,000)	$ (16,600,000)
Gain (loss) due to debt extinguishments						(14,900,000)	0
Premium Paid						$ 12,500,000
Senior Unsecured 5.250% Notes due May 2023 [Member]
Debt Instrument [Line Items]
Gain (loss) due to debt extinguishments				$ 800,000
Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Write-off debt issuance cost							4,500,000
Gain (loss) due to debt extinguishments							(33,800,000)
Premium Paid							$ 29,300,000
Maturity date				Mar. 31, 2022
TRGP Revolver [Member]
Debt Instrument [Line Items]
Gain (loss) due to debt extinguishments				$ 15,000,000
Senior Unsecured 4.250% Notes due November 2023 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt					4.25%
Gain (loss) due to debt extinguishments					$ (1,900,000)
Maturity date					May 31, 2021
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%
Term Loan Facility [Member]
Debt Instrument [Line Items]
Gain (loss) due to debt extinguishments	$ 2,100,000
Maturity date			Jul. 31, 2025
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt						5.125%				4.20%
Net proceeds from private placement of notes	$ 2,000,000,000	$ 1,700,000,000
Senior Unsecured Notes [Member] | Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt			5.20%
Senior Unsecured Notes [Member] | Senior Unsecured Notes Due February2033 [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
Senior Unsecured Notes [Member] | Senior Unsecured 6.150% Fixed Rate, due March 2029 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt	6.15%						6.15%	6.15%
Maturity date							Mar. 31, 2029	Mar. 31, 2029
Aggregate principal amount issued	$ 1,000,000,000
Senior Unsecured Notes [Member] | Senior Unsecured 6.500% Fixed Rate, due March 2034 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt	6.50%						6.50%	6.50%
Maturity date							Mar. 31, 2034	Mar. 31, 2034
Aggregate principal amount issued	$ 1,000,000,000
Senior Unsecured Notes [Member] | Term Loan Facility [Member]
Debt Instrument [Line Items]
Aggregate principal amount issued			$ 1,500,000,000
Targa Resources Partners LP [Member] | Targa Pipeline Partners L P
Debt Instrument [Line Items]
Gain (loss) due to debt extinguishments						$ 200,000
Targa Resources Partners LP [Member] | Senior Notes due 2027 [Member] | Targa Pipeline Partners L P
Debt Instrument [Line Items]
Write-off debt issuance cost				$ 2,400,000
Interest rate on fixed rate debt				5.375%
Premium Paid				$ 12,600,000
Targa Resources Partners LP [Member] | Senior Unsecured 4.200% Notes due 2027 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt				4.20%
Targa Resources Partners LP [Member] | Senior Unsecured 4.950% Notes due 2027 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt				4.95%
Targa Resources Partners LP [Member] | Senior Unsecured 5.875% Notes due 2027 [Member]
Debt Instrument [Line Items]
Interest rate on fixed rate debt				5.875%
Targa Resources Partners LP [Member] | Senior Unsecured 5.875% Notes due August 2023 [Member] | Targa Pipeline Partners L P
Debt Instrument [Line Items]
Interest rate on fixed rate debt						5.875%
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | TPL 4.750% Senior Notes due 2021 [Member] | Targa Pipeline Partners L P
Debt Instrument [Line Items]
Interest rate on fixed rate debt						4.75%