Certain Provisions of the ENLK Partnership Agreement - Narrative and Distributions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Series B Preferred Unitholders
Partnership agreement
Distribution paid-in kind (in shares)	150,871	150,494	149,371	148,999
Cash distributions	$ 17.0	$ 16.9	$ 16.8	$ 16.8
Series B Preferred Unitholders | EnLink Midstream Partners, LP
Partnership agreement
Preferred units, issued (in shares)	60,348,278	60,197,784
Preferred units, outstanding (in shares)	60,348,278	60,197,784
Series C Preferred Unitholders | EnLink Midstream Partners, LP
Partnership agreement
Preferred units, issued (in shares)	400,000	400,000
Preferred units, outstanding (in shares)	400,000	400,000