CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net income (loss)	$ 168.6	$ 227.9
Commodity hedging contracts:
Other comprehensive income (loss), pre-tax	(241.4)	(21.8)
Other comprehensive income (loss), related income tax	53.9	5.2
Other comprehensive income (loss), after tax	(187.5)	(16.6)
Comprehensive income (loss)	(18.9)	211.3
Less: Comprehensive income (loss) attributable to noncontrolling interests	80.6	81.5
Comprehensive income (loss) attributable to Targa Resources Corp.	(99.5)	129.8
Commodity Contracts [Member]
Commodity hedging contracts:
Change in fair value, pre-tax	(387.1)	(171.5)
Change in fair value, related income tax	86.6	40.2
Change in fair value, after tax	(300.5)	(131.3)
Settlements reclassified to revenues, pre-tax	145.7	149.7
Settlements reclassified to revenues, related income tax	(32.7)	(35.0)
Settlements reclassified to revenues, after tax	$ 113.0	$ 114.7