Derivatives - Commodities (Details) - Commodity Swaps gal in Millions, bbl in Millions, MMBTU in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) MMBTU bbl gal	Dec. 31, 2018 USD ($)
Derivatives
Net Fair Value	$ 8.4
EnLink Midstream Partners, LP
Derivatives
Net Fair Value	8.4	$ 8.5
Maximum loss if counterparties fail to perform	17.2
Maximum potential exposure to credit losses net exposure	$ 8.4
EnLink Midstream Partners, LP | NGL | Short
Derivatives
Notional amount (in gallons or MMbbls) | gal	64.0
Net Fair Value	$ 1.7
EnLink Midstream Partners, LP | NGL | Long
Derivatives
Notional amount (in gallons or MMbbls) | gal	11.7
Net Fair Value	$ (0.5)
EnLink Midstream Partners, LP | Natural Gas | Short
Derivatives
Notional amount (in mmbtu) | MMBTU	4.7
Net Fair Value	$ 1.0
EnLink Midstream Partners, LP | Natural Gas | Long
Derivatives
Notional amount (in mmbtu) | MMBTU	3.7
Net Fair Value	$ (0.4)
EnLink Midstream Partners, LP | Condensate | Short
Derivatives
Notional amount (in gallons or MMbbls) | bbl	12.8
Net Fair Value	$ (1.0)
EnLink Midstream Partners, LP | Crude and condensate | Long
Derivatives
Notional amount (in gallons or MMbbls) | bbl	2.0
Net Fair Value	$ 7.6