Certain Provisions of the Partnership Agreement - Allocation of Income (Details) - General Partner - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Incentive distribution
Income allocation for incentive distributions	$ 59.5	$ 58.9	$ 56.8
Unit-based compensation attributable to ENLC’s restricted units	(20.3)	(21.0)	(14.7)
General partner share of net income (loss)	(0.6)	0.4	(2.6)
General partner interest in net income	$ 38.6	$ 38.3	$ 39.5