CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Revenues:
Total revenues		$ 4,562.4	$ 4,520.5
Costs and expenses:
Product purchases and fuel		3,218.0	3,019.0
Operating expenses		278.0	258.2
Depreciation and amortization expense		340.5	324.8
General and administrative expense		86.5	82.4
Other operating (income) expense			(0.6)
Income (loss) from operations		639.4	836.7
Other income (expense):
Interest expense, net		(228.6)	(168.0)
Equity earnings (loss)		2.8	(0.2)
Other, net		1.7	(3.0)
Income (loss) before income taxes		415.3	665.5
Income tax (expense) benefit		(82.7)	(110.3)
Net income (loss)		332.6	555.2
Less: Net income (loss) attributable to noncontrolling interests		57.4	58.2
Net income (loss) attributable to Targa Resources Corp.		275.2	497.0
Premium on repurchase of noncontrolling interests, net of tax	[1]		490.7
Net income (loss) attributable to common shareholders		$ 275.2	$ 6.3
Net income (loss) per common share - basic		$ 1.23	$ 0.03
Net income (loss) per common share - diluted		$ 1.22	$ 0.03
Weighted average shares outstanding - basic		222.8	226.4
Weighted average shares outstanding - diluted		223.7	229.3
Sales of Commodities [Member]
Revenues:
Total revenues		$ 3,953.0	$ 4,025.0
Fees from Midstream Services [Member]
Revenues:
Total revenues		$ 609.4	$ 495.5

[1] Represents premium paid on the Grand Prix Transaction. See Note 4 – Acquisitions.