Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 320.0	$ (888.2)	$ (1,409.7)
Loss on designated cash flow hedge, net of tax benefit and amortization to interest expense	[1]	(2.0)	0.0	0.0
Comprehensive income (loss)		318.0	(888.2)	(1,409.7)
Comprehensive income (loss) attributable to non-controlling interest		105.6	(428.2)	(1,054.5)
Comprehensive income (loss) attributable to EnLink Midstream, LLC		$ 212.4	$ (460.0)	$ (355.2)

[1] The loss on designated cash flow hedge recorded in accumulated other comprehensive loss for the year ended December 31, 2017 was net of a tax benefit of $0.2 million. For the year ended December 31, 2017, we amortized an immaterial amount of the loss into interest expense.