CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net income (loss)	$ 555.2	$ 168.6
Commodity hedging contracts:
Other comprehensive income (loss), pre-tax	38.7	(241.4)
Other comprehensive income (loss), related income tax	(8.6)	53.9
Other comprehensive income (loss), after tax	30.1	(187.5)
Comprehensive income (loss)	585.3	(18.9)
Less: Comprehensive income (loss) attributable to noncontrolling interests	58.2	80.6
Comprehensive income (loss) attributable to Targa Resources Corp.	527.1	(99.5)
Commodity Contracts [Member]
Commodity hedging contracts:
Change in fair value, pre-tax	83.9	(387.1)
Change in fair value, related income tax	(18.6)	86.6
Change in fair value, after tax	65.3	(300.5)
Settlements reclassified to revenues, pre-tax	(45.2)	145.7
Settlements reclassified to revenues, related income tax	10.0	(32.7)
Settlements reclassified to revenues, after tax	$ (35.2)	$ 113.0