CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Sales of commodities (see Note 3)	$ 2,173.7	$ 1,858.1
Fees from midstream services (see Note 3)	281.9	254.5
Total revenues	2,455.6	2,112.6
Costs and expenses:
Product purchases (see Note 3)	1,941.0	1,654.2
Operating expenses	173.2	151.9
Depreciation and amortization expense	198.1	191.1
General and administrative expense	56.7	48.7
Other operating (income) expense	0.3	16.2
Income (loss) from operations	86.3	50.5
Other income (expense):
Interest income (expense), net	16.1	(63.0)
Equity earnings (loss)	1.5	(12.6)
Gain (loss) from financing activities		(5.8)
Change in contingent considerations	(56.1)	(3.3)
Other, net		(5.2)
Income (loss) before income taxes	47.8	(39.4)
Income tax (expense) benefit	(8.9)	(71.1)
Net income (loss)	38.9	(110.5)
Less: Net income (loss) attributable to noncontrolling interests	16.0	8.8
Net income (loss) attributable to Targa Resources Corp.	22.9	(119.3)
Dividends on Series A Preferred Stock	22.9	22.9
Deemed dividends on Series A Preferred Stock	7.0	6.1
Net income (loss) attributable to common shareholders	$ (7.0)	$ (148.3)
Net income (loss) per common share - basic	$ (0.03)	$ (0.77)
Net income (loss) per common share - diluted	$ (0.03)	$ (0.77)
Weighted average shares outstanding - basic	218.7	191.8
Weighted average shares outstanding - diluted	218.7	191.8
Dividends per common share declared for the period	$ 0.91	$ 0.91