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Significant Accounting Policies (Gas Imbalances) (Detail) - EnLink Midstream Partners, LP - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Oil and Gas Delivery Commitments and Contracts Additional Information [Abstract]    
Midstream services-MVC $ 11.4 $ 0.5
Midstream services-related parties-MVC 46.2 24.4
Total-MVC 57.6 24.9
Gas Imbalance    
Gas Balancing Payable 7.1 2.6
Gas Balancing Receivable 3.9 3.6
Texas Operating Segment    
Oil and Gas Delivery Commitments and Contracts Additional Information [Abstract]    
Midstream services-MVC 1.9 0.5
Midstream services-related parties-MVC 26.4 3.8
Total-MVC 28.3 4.3
Oklahoma Operating Segment    
Oil and Gas Delivery Commitments and Contracts Additional Information [Abstract]    
Midstream services-MVC 9.5  
Midstream services-related parties-MVC 10.8 20.1
Total-MVC 20.3 20.1
Crude And Condensate Segment    
Oil and Gas Delivery Commitments and Contracts Additional Information [Abstract]    
Midstream services-related parties-MVC 9.0 0.5
Total-MVC $ 9.0 $ 0.5