Consolidated Statements of Operations - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues:
Product sales		$ 4,358.4	$ 3,008.9	$ 3,253.7
Product sales—related parties		144.9	134.3	119.4
Midstream services		552.3	467.2	451.0
Midstream services—related parties		688.2	653.1	618.6
Gain (loss) on derivative activity		(4.2)	(11.1)	9.4
Total revenues		5,739.6	4,252.4	4,452.1
Operating costs and expenses:
Cost of sales	[1]	4,361.5	3,015.5	3,245.3
Operating expenses		418.7	398.5	419.9
General and administrative		128.6	122.5	136.9
Loss on disposition of assets		0.0	13.2	1.2
Depreciation and amortization		545.3	503.9	387.3
Impairments		17.1	873.3	1,563.4
Gain on litigation settlement		(26.0)	0.0	0.0
Total operating costs and expenses		5,445.2	4,926.9	5,754.0
Operating income (loss)		294.4	(674.5)	(1,301.9)
Other income (expense):
Interest expense, net of interest income		(190.4)	(189.5)	(103.3)
Gain on extinguishment of debt		9.0	0.0	0.0
Income (loss) from unconsolidated affiliates		9.6	(19.9)	20.4
Other income		0.6	0.3	0.8
Total other expense		(171.2)	(209.1)	(82.1)
Income (loss) before non-controlling interest and income taxes		123.2	(883.6)	(1,384.0)
Income tax benefit (provision)		196.8	(4.6)	(25.7)
Net income (loss)		320.0	(888.2)	(1,409.7)
Net income (loss) attributable to non-controlling interest		107.2	(428.2)	(1,054.5)
Net income (loss) attributable to EnLink Midstream, LLC		212.8	(460.0)	(355.2)
Devon investment interest in net income		0.0	0.0	1.8
EnLink Midstream, LLC interest in net income (loss)		$ 212.8	$ (460.0)	$ (357.0)
Net income (loss) attributable to EnLink Midstream, LLC per unit:
Basic common unit (in dollars per share)		$ 1.18	$ (2.56)	$ (2.17)
Diluted common unit (in dollars per share)		$ 1.17	$ (2.56)	$ (2.17)

[1] Includes related party cost of sales of $211.0 million, $150.1 million and $141.3 million for the years ended December 31, 2017, 2016 and 2015, respectively.