Members' Equity - Computation and Distribution Activity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Distributed earnings allocated to:
Total distributed earnings	$ 55.7	$ 47.1	$ 111.2	$ 94.1
Undistributed income (loss) allocated to:
Total undistributed loss, basic	29.6	(68.7)	9.3	(128.4)
Total undistributed loss, diluted	29.6	(68.7)	9.3	(128.4)
Net income (loss) attributable to ENLC allocated to:
Total net income (loss), basic	85.3	(21.6)	120.5	(34.3)
Total net income (loss), diluted	$ 85.3	$ (21.6)	$ 120.5	$ (34.3)
Net income (loss) attributable to ENLC per unit:
Basic (in dollars per share)	$ 0.18	$ (0.04)	$ 0.25	$ (0.07)
Diluted (in dollars per share)	$ 0.17	$ (0.04)	$ 0.25	$ (0.07)
Unvested restricted units
Distributed earnings allocated to:
Total distributed earnings	$ 1.4	$ 1.1	$ 2.5	$ 2.2
Undistributed income (loss) allocated to:
Total undistributed loss, basic	0.6	(1.6)	0.2	(3.0)
Total undistributed loss, diluted	0.6	(1.6)	0.2	(3.0)
Net income (loss) attributable to ENLC allocated to:
Total net income (loss), basic	2.0	(0.5)	2.7	(0.8)
Total net income (loss), diluted	2.0	(0.5)	2.7	(0.8)
Common units
Distributed earnings allocated to:
Total distributed earnings	54.3	46.0	108.7	91.9
Undistributed income (loss) allocated to:
Total undistributed loss, basic	29.0	(67.1)	9.1	(125.4)
Total undistributed loss, diluted	29.0	(67.1)	9.1	(125.4)
Net income (loss) attributable to ENLC allocated to:
Total net income (loss), basic	83.3	(21.1)	117.8	(33.5)
Total net income (loss), diluted	$ 83.3	$ (21.1)	$ 117.8	$ (33.5)