CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Total revenues	$ 2,299.4	$ 2,455.6
Costs and expenses:
Product purchases	1,726.0	1,941.0
Operating expenses	190.2	173.2
Depreciation and amortization expense	237.4	198.1
General and administrative expense	81.1	56.7
Other operating (income) expense	3.4	0.3
Income (loss) from operations	61.3	86.3
Other income (expense):
Interest income (expense), net	(80.6)	16.1
Equity earnings (loss)	2.8	1.5
Gain (loss) from financing activities	(1.4)
Change in contingent considerations	(9.7)	(56.1)
Income (loss) before income taxes	(27.6)	47.8
Income tax (expense) benefit	2.9	(8.9)
Net income (loss)	(24.7)	38.9
Less: Net income (loss) attributable to noncontrolling interests	14.2	16.0
Net income (loss) attributable to Targa Resources Corp.	(38.9)	22.9
Dividends on Series A Preferred Stock	22.9	22.9
Deemed dividends on Series A Preferred Stock	7.9	7.0
Net income (loss) attributable to common shareholders	$ (69.7)	$ (7.0)
Net income (loss) per common share - basic	$ (0.30)	$ (0.03)
Net income (loss) per common share - diluted	$ (0.30)	$ (0.03)
Weighted average shares outstanding - basic	232.2	218.7
Weighted average shares outstanding - diluted	232.2	218.7
Sales of Commodities [Member]
Revenues:
Total revenues	$ 1,976.5	$ 2,173.7
Fees from Midstream Services [Member]
Revenues:
Total revenues	$ 322.9	$ 281.9