Derivatives - Commodities (Details) - Commodity Swaps gal in Millions, bbl in Millions, MMBTU in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) MMBTU bbl gal	Dec. 31, 2017 USD ($)
Derivatives
Fair Value	$ 8.5
EnLink Midstream Partners, LP
Derivatives
Fair Value	8.5	$ (1.6)
Maximum loss if counterparties fail to perform	32.7
Maximum potential exposure to credit losses net exposure	$ 9.4
EnLink Midstream Partners, LP | NGL | Short
Derivatives
Notional amount (in gallons or MMbbls) | gal	29.0
Fair Value	$ 4.5
EnLink Midstream Partners, LP | NGL | Long
Derivatives
Notional amount (in gallons or MMbbls) | gal	7.7
Fair Value	$ 0.1
EnLink Midstream Partners, LP | Natural Gas | Short
Derivatives
Notional amount (in mmbtu) | MMBTU	9.0
Fair Value	$ (1.6)
EnLink Midstream Partners, LP | Natural Gas | Long
Derivatives
Notional amount (in mmbtu) | MMBTU	14.9
Fair Value	$ (1.5)
EnLink Midstream Partners, LP | Condensate | Short
Derivatives
Notional amount (in gallons or MMbbls) | bbl	12.9
Fair Value	$ 23.6
EnLink Midstream Partners, LP | Crude and condensate | Long
Derivatives
Notional amount (in gallons or MMbbls) | bbl	0.0
Fair Value	$ (16.6)