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Supplemental Cash Flow Information (Details) - USD ($) shares in Millions, $ in Millions		12 Months Ended
	Jan. 07, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
EnLink Oklahoma T.O.
Noncash Transactions [Line Items]
Installment payable, net of discount of $79.1 million	$ 420.9
Installment payable discount	$ 79.1
EnLink Oklahoma T.O. \| EnLink Midstream Partners, LP
Noncash Transactions [Line Items]
Installment payable, net of discount of $79.1 million		$ 0.0	$ 420.9
Installment payable discount			79.1
Common Units \| EnLink Oklahoma T.O.
Noncash Transactions [Line Items]
Non-cash issuance of ENLC common units		$ 0.0	$ 214.9
Common Units \| Coronado \| EnLink Midstream Partners, LP
Noncash Transactions [Line Items]
Non-cash issuance of units				180.0
Class C Common Unit \| Coronado \| EnLink Midstream Partners, LP
Noncash Transactions [Line Items]
Non-cash issuance of units				180.0