Certain Provisions of the ENLK Partnership Agreement - Narrative and Distributions (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended								9 Months Ended
	Feb. 13, 2019	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019
Partnership agreement
Distribution declared/unit (in dollars per share)		$ 0.09375	$ 0.09375	$ 0.09375	$ 0.1875	$ 0.283	$ 0.283	$ 0.279	$ 0.275
Series B Preferred Unitholders
Partnership agreement
Distribution paid-in kind (in shares)		150,119	149,745	149,371	148,999	148,627	148,257	147,887	425,785
Cash distributions		$ 16.9	$ 16.8	$ 16.8	$ 16.8	$ 17.1	$ 17.1	$ 16.7	$ 16.5
Series B Preferred Unitholders | EnLink Midstream Partners, LP
Partnership agreement
Preferred units, issued (in shares)		60,047,665			59,599,550					60,047,665
Preferred units, outstanding (in shares)		60,047,665			59,599,550					60,047,665
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
Common units | EnLink Midstream Partners, LP
Partnership agreement
Distribution declared/unit (in dollars per share)	$ 0.39