CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Net income (loss)	$ 279.8	$ 332.6
Commodity hedging contracts:
Other comprehensive income (loss), pre-tax	(27.7)	(67.1)
Other comprehensive income (loss), related income tax	6.3	15.4
Other comprehensive income (loss), after tax	(21.4)	(51.7)
Comprehensive income (loss)	258.4	280.9
Less: Comprehensive income (loss) attributable to noncontrolling interests	9.3	57.4
Comprehensive income (loss) attributable to Targa Resources Corp.	249.1	223.5
Commodity Contracts [Member]
Commodity hedging contracts:
Change in fair value, pre-tax	(33.8)	(70.3)
Change in fair value, related income tax	7.7	16.1
Change in fair value, after tax	(26.1)	(54.2)
Settlements reclassified to revenues, pre-tax	6.1	3.2
Settlements reclassified to revenues, related income tax	(1.4)	(0.7)
Settlements reclassified to revenues, after tax	$ 4.7	$ 2.5