Certain Provisions of the ENLK Partnership Agreement - Narrative and Distributions (Details) - USD ($) $ in Millions	3 Months Ended						6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2021	Jun. 30, 2020
Series B Preferred Unitholders
Partnership agreement
Distribution paid-in kind (in shares)	151,248	150,871	150,494	149,745	149,371	148,999
Cash distributions	$ 17.0	$ 17.0	$ 16.9	$ 16.8	$ 16.8	$ 16.8
Series B Preferred Unitholders | EnLink Midstream Partners, LP
Partnership agreement
Preferred units, issued (in shares)	60,499,149		60,197,784				60,499,149
Preferred units, outstanding (in shares)	60,499,149		60,197,784				60,499,149
Series C Preferred Unitholders
Partnership agreement
Distribution paid-in kind (in shares)	12,000,000.0			12,000,000.0			12,000,000.0	12,000,000.0
Series C Preferred Unitholders | EnLink Midstream Partners, LP
Partnership agreement
Preferred units, issued (in shares)	400,000		400,000				400,000
Preferred units, outstanding (in shares)	400,000		400,000				400,000