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Commitments and Contingencies (Details) $ in Millions		1 Months Ended			12 Months Ended
Commitments and Contingencies (Details) $ in Millions	Jul. 29, 2016 USD ($)	Aug. 31, 2014 USD ($)	Jul. 31, 2013 item	Aug. 31, 2012 item	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Operating leases future minimum payments
Operating Leases, Rent Expense, Net					$ 59.6	$ 66.1	$ 51.4
Environmental settlement fine						$ 3.5
Gain on litigation settlement							$ 6.1
LDEQ
Operating leases future minimum payments
Environmental settlement fine	$ 0.1
EnLink Midstream Partners, LP
Operating leases future minimum payments
2017					16.2
2018					15.4
2019					10.9
2020					8.6
2021					8.7
Thereafter					64.0
Total Operating Leases					$ 123.8
EnLink Midstream Partners, LP \| Flood Protection Authority for New Orleans
Operating leases future minimum payments
Number of defendants \| item			100
EnLink Midstream Partners, LP \| Texas Brine
Operating leases future minimum payments
Number of defendants \| item				2
Gain on litigation settlement		$ 6.1