Goodwill and Intangible Assets - Narrative (Details) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss recognized				$ 1,125,600,000	$ 232,000,000.0	$ 0
Impairment of intangible assets				$ 0	0	0
Intangible asset, useful life				15 years
Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life				5 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible asset, useful life				20 years
EnLink Midstream Partners, LP
Finite-Lived Intangible Assets [Line Items]
Amortization expense				$ (123,700,000)	(123,500,000)	$ (127,100,000)
Corporate | Louisiana | EnLink Midstream Partners, LP
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss recognized		$ 186,500,000
Corporate | Crude and Condensate | EnLink Midstream Partners, LP
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss recognized				0	0
Operating Segments | Louisiana | EnLink Midstream Partners, LP
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss recognized				186,500,000	0
Operating Segments | North Texas
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss recognized			$ 202,700,000
Operating Segments | North Texas | EnLink Midstream Partners, LP
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss recognized	$ 125,700,000				202,700,000
Operating Segments | Oklahoma | EnLink Midstream Partners, LP
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss recognized	$ 813,400,000				0
Operating Segments | Permian
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss recognized			$ 29,300,000
Operating Segments | Permian | EnLink Midstream Partners, LP
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment loss recognized				$ 0	$ 29,300,000