Derivatives - Commodities (Details) - Commodity Swaps gal in Millions, bbl in Millions, MMBTU in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) MMBTU bbl gal	Dec. 31, 2019 USD ($)
Derivatives
Net Fair Value	$ (2.1)
EnLink Midstream Partners, LP
Derivatives
Net Fair Value	(2.1)	$ 8.4
Maximum loss if counterparties fail to perform	29.9
Maximum potential exposure to credit losses net exposure	$ 9.2
EnLink Midstream Partners, LP | NGL | Short
Derivatives
Notional amount (in gallons or MMbbls) | gal	117.3
Net Fair Value	$ (14.8)
EnLink Midstream Partners, LP | NGL | Long
Derivatives
Notional amount (in gallons or MMbbls) | gal	13.7
Net Fair Value	$ 0.3
EnLink Midstream Partners, LP | Natural Gas | Short
Derivatives
Notional amount (in mmbtu) | MMBTU	15.9
Net Fair Value	$ 1.4
EnLink Midstream Partners, LP | Natural Gas | Long
Derivatives
Notional amount (in mmbtu) | MMBTU	10.7
Net Fair Value	$ 1.2
EnLink Midstream Partners, LP | Condensate | Short
Derivatives
Notional amount (in gallons or MMbbls) | bbl	10.1
Net Fair Value	$ (7.0)
EnLink Midstream Partners, LP | Crude and condensate | Long
Derivatives
Notional amount (in gallons or MMbbls) | bbl	2.5
Net Fair Value	$ 16.8