CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Total revenues	$ 1,902.5	$ 2,986.4	$ 6,197.2	$ 7,886.3
Costs and expenses:
Product purchases	1,328.1	2,383.5	4,415.7	6,229.7
Operating expenses	200.2	194.9	600.8	538.7
Depreciation and amortization expense	244.3	206.3	718.9	607.1
General and administrative expense	69.9	63.2	223.5	176.9
Other operating (income) expense	18.4	61.8	21.7	15.7
Income (loss) from operations	41.6	76.7	216.6	318.2
Other income (expense):
Interest expense, net	(89.1)	(78.2)	(241.8)	(124.2)
Equity earnings (loss)	10.0	3.0	15.9	6.4
Gain (loss) from financing activities			(1.4)	(2.0)
Gain (loss) from sale of equity-method investment	65.8		65.8
Change in contingent considerations		(16.6)	(8.8)	(12.1)
Income (loss) before income taxes	28.3	(15.1)	46.3	186.3
Income tax (expense) benefit	3.8	3.9	10.0	(37.7)
Net income (loss)	32.1	(11.2)	56.3	148.6
Less: Net income (loss) attributable to noncontrolling interests	79.4	12.5	152.7	40.4
Net income (loss) attributable to Targa Resources Corp.	(47.3)	(23.7)	(96.4)	108.2
Dividends on Series A Preferred Stock	22.9	22.9	68.8	68.8
Deemed dividends on Series A Preferred Stock	8.4	7.4	24.4	21.5
Net income (loss) attributable to common shareholders	$ (78.6)	$ (54.0)	$ (189.6)	$ 17.9
Net income (loss) per common share - basic	$ (0.34)	$ (0.24)	$ (0.82)	$ 0.08
Net income (loss) per common share - diluted	$ (0.34)	$ (0.24)	$ (0.82)	$ 0.08
Weighted average shares outstanding - basic	232.7	226.5	232.4	222.1
Weighted average shares outstanding - diluted	232.7	226.5	232.4	223.8
Sales of Commodities [Member]
Revenues:
Total revenues	$ 1,594.2	$ 2,654.1	$ 5,254.8	$ 6,981.4
Fees from Midstream Services [Member]
Revenues:
Total revenues	$ 308.3	$ 332.3	$ 942.4	$ 904.9