Certain Provision of the Partnership Agreement (Allocation) (Details) - General Partner - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Incentive distribution
Income allocation for incentive distributions	$ 56.8	$ 47.5	$ 20.6
Unit-based compensation attributable to ENLC's restricted units	(14.7)	(18.3)	(10.4)
General Partner share of net income (loss)	(2.6)	(6.7)	1.1
General Partner interest in drop down transactions		35.5	127.0
General Partner interest in net income	$ 39.5	$ 58.0	$ 138.3