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Employee Incentive Plans - Benefit Plan (Details) - EnLink Midstream Partners, LP - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Defined Contribution Plan Disclosure [Line Items]      
Employer matching contribution, percent 100.00%    
Employer matching contribution, percent of employees' gross pay 6.00%    
Non-discretionary contribution percentage 2.00%    
Employer benefit plan contributions $ 8.3 $ 7.6 $ 7.4