Certain Provisions of the Partnership Agreement - Allocation of Income (Details) - General Partner - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Incentive distribution
Income allocation for incentive distributions	$ 0.0	$ 59.5	$ 58.9
Unit-based compensation attributable to ENLC’s restricted and performance units	(37.0)	(20.3)	(21.0)
General Partner share of net income (loss)	(1.4)	(0.6)	0.4
General Partner interest in EOGP acquisition	2.4	27.5	4.8
General Partner interest in net income (loss)	$ (36.0)	$ 66.1	$ 43.1