CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Total revenues	$ 1,523.5	$ 1,995.3	$ 3,572.4	$ 4,294.7
Costs and expenses:
Product purchases	860.6	1,361.6	2,043.6	3,087.6
Operating expenses	183.4	210.2	383.3	400.5
Depreciation and amortization expense	204.5	237.2	443.6	474.6
General and administrative expense	58.6	69.3	115.5	146.7
Impairment of long-lived assets	0.0	0.0	2,442.8	0.0
Other operating (income) expense	0.4	(0.2)	1.6	3.3
Income (loss) from operations	216.0	117.2	(1,858.0)	182.0
Other income (expense):
Interest expense, net	(94.3)	(69.5)	(188.1)	(144.9)
Equity earnings (loss)	14.9	3.2	35.5	5.9
Gain (loss) from financing activities	21.8	0.0	61.1	(1.4)
Change in contingent considerations	0.0	0.8	0.0	(8.9)
Other, net	0.8	0.0	0.8	0.0
Income (loss) before income taxes	159.2	51.7	(1,948.7)	32.7
Income tax (expense) benefit	0.0	0.0	0.0	0.0
Net income (loss)	159.2	51.7	(1,948.7)	32.7
Less: Net income (loss) attributable to noncontrolling interests	93.3	56.3	8.0	67.7
Net income (loss) attributable to Targa Resources Partners LP	65.9	(4.6)	(1,956.7)	(35.0)
Net income attributable to preferred limited partners	2.8	2.8	5.6	5.6
Net income (loss) attributable to general partner	1.2	(0.1)	(39.4)	(0.8)
Net income (loss) attributable to common limited partners	61.9	(7.3)	(1,922.9)	(39.8)
Sales of Commodities [Member]
Revenues:
Total revenues	1,280.6	1,684.2	3,060.2	3,660.7
Fees from Midstream Services [Member]
Revenues:
Total revenues	$ 242.9	$ 311.1	$ 512.2	$ 634.0