CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net income (loss)	$ 687.6	$ 155.4	$ 856.2	$ 383.3
Commodity hedging contracts:
Other comprehensive income (loss), pre-tax	182.9	(179.0)	(58.6)	(200.8)
Other comprehensive income (loss), related income tax	(40.9)	43.0	13.1	48.2
Other comprehensive income (loss), after tax	142.0	(136.0)	(45.5)	(152.6)
Comprehensive income (loss)	829.6	19.4	810.7	230.7
Less: Comprehensive income (loss) attributable to noncontrolling interests	91.2	99.2	171.8	180.7
Comprehensive income (loss) attributable to Targa Resources Corp.	738.4	(79.8)	638.9	50.0
Commodity Contracts [Member]
Commodity hedging contracts:
Change in fair value, pre-tax	25.2	(232.6)	(362.1)	(404.2)
Change in fair value, related income tax	(5.7)	55.7	80.9	95.9
Change in fair value, after tax	19.5	(176.9)	(281.2)	(308.3)
Settlements reclassified to revenues, pre-tax	157.7	53.6	303.5	203.4
Settlements reclassified to revenues, related income tax	(35.2)	(12.7)	(67.8)	(47.7)
Settlements reclassified to revenues, after tax	$ 122.5	$ 40.9	$ 235.7	$ 155.7