CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues:
Total revenues		$ 3,403.7	$ 6,055.8	$ 7,924.2	$ 11,014.9
Costs and expenses:
Product purchases and fuel		2,068.9	5,047.3	5,088.0	9,251.5
Operating expenses		272.6	215.8	530.7	399.3
Depreciation and amortization expense		332.1	269.9	656.9	479.0
General and administrative expense		81.0	71.0	163.4	138.0
Other operating (income) expense			(0.1)	(0.6)	(0.6)
Income (loss) from operations		649.1	451.9	1,485.8	747.7
Other income (expense):
Interest expense, net		(166.6)	(81.2)	(334.7)	(174.7)
Equity earnings (loss)		3.4	1.4	3.2	7.0
Gain (loss) from financing activities			(33.8)		(49.6)
(Gain) loss from sale of equity method investment			435.9		435.9
Other, net		(2.0)	0.5	(4.9)
Income (loss) before income taxes		483.9	774.7	1,149.4	966.3
Income tax (expense) benefit		(96.4)	(87.1)	(206.7)	(110.1)
Net income (loss)		387.5	687.6	942.7	856.2
Less: Net income (loss) attributable to noncontrolling interests		58.2	91.2	116.4	171.8
Net income (loss) attributable to Targa Resources Corp.		329.3	596.4	826.3	684.4
Premium on repurchase of noncontrolling interests, net of tax	[1]			490.7	53.1
Dividends on Series A Preferred Stock			8.2		30.0
Deemed dividends on Series A Preferred Stock			215.5		215.5
Net income (loss) attributable to common shareholders		$ 329.3	$ 372.7	$ 335.6	$ 385.8
Net income (loss) per common share - basic		$ 1.44	$ 1.64	$ 1.47	$ 1.69
Net income (loss) per common share - diluted		$ 1.44	$ 1.61	$ 1.46	$ 1.66
Weighted average shares outstanding - basic		225.6	227.8	226.0	228.1
Weighted average shares outstanding - diluted		226.8	231.7	227.3	232.0
Sales of Commodities [Member]
Revenues:
Total revenues		$ 2,914.6	$ 5,624.2	$ 6,939.7	$ 10,190.3
Fees from Midstream Services [Member]
Revenues:
Total revenues		$ 489.1	$ 431.6	$ 984.5	$ 824.6

[1] Represents premium paid on the Grand Prix Transaction and the DevCo JV Repurchase. See Note 4 – Acquisitions and Divestitures.