Debt Obligations - Summary Of Debt Obligations (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
Current Obligations of the Partnership [Abstract]
Partnership accounts receivable securitization facility, due September 2023	[1]	$ 800.0	$ 150.0
Finance lease liabilities	[2]	34.3	12.8
Current debt obligations		834.3	162.8
Long-term [Abstract]
Long-term debt including Unamortized premium(discount) and Debt issuance costs		10,574.7	6,465.7
Debt issuance costs, net of amortization		(65.6)	(45.0)
Finance lease liabilities	[2]	193.0	13.7
Long-term debt		10,702.1	6,434.4
Total debt obligations		11,536.4	6,597.2
Letters of credit outstanding		33.2	71.3
Senior Unsecured Notes [Member]
Long-term [Abstract]
Unamortized discount		(8.4)	0.0
Senior Unsecured Notes [Member] | Senior Unsecured 5.875% Notes due April 2026 [Member] | Targa Resources Partners LP [Member]
Long-term [Abstract]
Long-term debt	[3]	0.0	963.2
Senior Unsecured Notes [Member] | Senior Unsecured 5.375% Notes due February 2027 [Member] | Targa Resources Partners LP [Member]
Long-term [Abstract]
Long-term debt	[3]	0.0	468.1
Senior Unsecured Notes [Member] | Senior Unsecured 6.500% fixed rate, due July 2027 [Member]
Long-term [Abstract]
Long-term debt		750.0	0.0
Senior Unsecured Notes [Member] | Senior Unsecured 6.500% fixed rate, due July 2027 [Member] | Targa Resources Partners LP [Member]
Long-term [Abstract]
Long-term debt	[3]	705.2	705.2
Senior Unsecured Notes [Member] | Senior Unsecured 5.000% Notes due January 2028 [Member] | Targa Resources Partners LP [Member]
Long-term [Abstract]
Long-term debt	[3]	700.3	700.3
Senior Unsecured Notes [Member] | Senior Unsecured of 6.875% Senior Notes due January 2029 [Member] | Targa Resources Partners LP [Member]
Long-term [Abstract]
Long-term debt	[3]	679.3	679.3
Senior Unsecured Notes [Member] | Senior Unsecured of 5.500% Senior Notes due March 2030 [Member] | Targa Resources Partners LP [Member]
Long-term [Abstract]
Long-term debt	[3]	949.6	949.6
Senior Unsecured Notes [Member] | Senior Unsecured 4.875% Notes due February 2031 [Member] | Targa Resources Partners LP [Member]
Long-term [Abstract]
Long-term debt	[3]	1,000.0	1,000.0
Senior Unsecured Notes [Member] | Senior Unsecured of 4.000% Senior Notes due January 2032 [Member] | Targa Resources Partners LP [Member]
Long-term [Abstract]
Long-term debt	[3]	1,000.0	1,000.0
Senior Unsecured Notes [Member] | Senior Unsecured 4.200% Notes due February 2033 [Member]
Long-term [Abstract]
Long-term debt		750.0	0.0
Senior Unsecured Notes [Member] | Senior Unsecured 4.950% Notes due April 2052 [Member]
Long-term [Abstract]
Long-term debt		750.0	0.0
Senior Unsecured Notes [Member] | Senior Unsecured 6.250% fixed rate, due July 2052 [Member]
Long-term [Abstract]
Long-term debt		500.0	0.0
Revolving Credit Facility [Member] | TRP Senior Secured Revolving Credit Facility due June 2023 [Member] | Targa Resources Partners LP [Member]
Long-term [Abstract]
Letters of credit outstanding	[4]	0.0	71.3
Revolving Credit Facility [Member] | TRGP Senior Revolving Credit Facility due February 2027 [Member]
Long-term [Abstract]
Long-term debt	[4]	1,298.7	0.0
Revolving Credit Facility [Member] | TRGP Senior Revolving Credit Facility due February 2027 [Member] | Targa Resources Partners LP [Member]
Long-term [Abstract]
Letters of credit outstanding	[4]	33.2	0.0
Term Loan Facility, Variable Rate, due July 2025
Long-term [Abstract]
Long-term debt		$ 1,500.0	$ 0.0

[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.

[2] The December 31, 2022 balance includes $171.2 million of assets and $167.0 million of liabilities related to compressor leases from the Delaware Basin Acquisition that were subsequently amended and extended.

[3] As of February 2022, we guarantee all of the Partnership’s outstanding senior unsecured notes.

[4] In February 2022, we entered into the TRGP Revolver which matures in February 2027, and terminated our previous TRGP senior secured revolving credit facility (the “Previous TRGP Revolver”) and the Partnership’s senior secured revolving credit facility (the “Partnership Revolver”). In July 2022, we established an unsecured commercial paper note program (the “Commercial Paper Program”), the borrowings of which are supported through maintaining a minimum available borrowing capacity under our TRGP Revolver equal to the aggregate amount outstanding under the Commercial Paper Program. As of December 31, 2022, the TRGP Revolver had $290.0 million borrowings outstanding and the Commercial Paper Program had $1.0 billion borrowings outstanding, resulting in approximately $1.4 billion of available liquidity, after accounting for outstanding letters of credit. As of December 31, 2021, we had no balance outstanding under the Previous TRGP Revolver or the Partnership Revolver.