CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net income (loss)	$ 279.3	$ 288.0	$ 1,135.5	$ 671.3
Commodity hedging contracts:
Other comprehensive income (loss), pre-tax	347.1	(194.3)	288.5	(395.1)
Other comprehensive income (loss), related income tax	(77.4)	46.6	(64.3)	94.8
Other comprehensive income (loss), after tax	269.7	(147.7)	224.2	(300.3)
Comprehensive income (loss)	549.0	140.3	1,359.7	371.0
Less: Comprehensive income (loss) attributable to noncontrolling interests	86.2	105.8	258.0	286.5
Comprehensive income (loss) attributable to Targa Resources Corp.	462.8	34.5	1,101.7	84.5
Commodity Contracts [Member]
Commodity hedging contracts:
Change in fair value, pre-tax	225.4	(294.7)	(136.7)	(698.9)
Change in fair value, related income tax	(50.4)	71.2	30.5	167.1
Change in fair value, after tax	175.0	(223.5)	(106.2)	(531.8)
Settlements reclassified to revenues, pre-tax	121.7	100.4	425.2	303.8
Settlements reclassified to revenues, related income tax	(27.0)	(24.6)	(94.8)	(72.3)
Settlements reclassified to revenues, after tax	$ 94.7	$ 75.8	$ 330.4	$ 231.5