CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net income (loss)	$ 1,553.5	$ 1,579.3	$ 1,531.4
Commodity hedging contracts:
Other comprehensive income (loss), pre-tax	(75.3)	40.0	367.4
Other comprehensive income (loss), related income tax	17.2	(9.1)	(81.8)
Other comprehensive income (loss), after tax	(58.1)	30.9	285.6
Comprehensive income (loss)	1,495.4	1,610.2	1,817.0
Less: Comprehensive income (loss) attributable to noncontrolling interests	241.5	233.4	335.9
Comprehensive income (loss) attributable to Targa Resources Corp.	1,253.9	1,376.8	1,481.1
Commodity Contracts [Member]
Commodity hedging contracts:
Change in fair value, pre-tax	(7.5)	193.4	(5.6)
Change in fair value, related income tax	1.7	(44.3)	1.3
Change in fair value, after tax	(5.8)	149.1	(4.3)
Settlements reclassified to revenues, pre-tax	(67.8)	(153.4)	373.0
Settlements reclassified to revenues, related income tax	15.5	35.2	(83.1)
Settlements reclassified to revenues, after tax	$ (52.3)	$ (118.2)	$ 289.9