Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Data (Unaudited)
Revenues	$ 1,224.9	$ 1,104.6	$ 1,033.2	$ 889.7	$ 1,066.5	$ 1,170.6	$ 1,274.5	$ 940.5	$ 4,252.4	$ 4,452.1	$ 3,507.8
Impairments				873.3	764.2	799.2			873.3	1,563.4
Operating income (loss)	39.2	65.9	45.2	(824.8)	(692.0)	(731.8)	71.4	50.5	(674.5)	(1,301.9)	354.3
Net income (loss) attributable to the non-controlling interest	(25.3)	10.4	0.4	(413.7)	(528.4)	(562.5)	28.4	8.0	(428.2)	(1,054.5)	126.7
Net income (loss) attributable to Enlink Midstream, LLC	$ (3.9)	$ 0.7	$ 0.8	$ (457.6)	$ (195.0)	$ (193.4)	$ 16.2	$ 17.0	$ (460.0)	$ (355.2)	$ 124.0
Basic common unit (usd per unit)	$ (0.02)		$ 0.01	$ (2.56)	$ (1.18)	$ (1.18)	$ 0.09	$ 0.10	$ (2.56)	$ (2.17)	$ 0.55
Diluted common unit (usd per unit)	$ (0.02)		$ 0.01	$ (2.56)	$ (1.18)	$ (1.18)	$ 0.09	$ 0.10	$ (2.56)	$ (2.17)	$ 0.55