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Derivatives - Commodities (Details) - EnLink Midstream Partners, LP
gal in Millions, MMBbls in Millions, MMBTU in Millions, $ in Millions
9 Months Ended
Sep. 30, 2017
USD ($)
MMBTU
gal
MMBbls
Dec. 31, 2016
USD ($)
Derivatives    
Fair Value $ (2.5) $ (6.3)
Commodity    
Derivatives    
Fair Value (2.5)  
Maximum loss if counterparties fail to perform 4.7  
Possible reduction in maximum loss if counterparties fail to perform $ 1.7  
Commodity | NGL | Short    
Derivatives    
Notional amount (in gallons and mmbls) | gal 35.8  
Fair Value $ (4.9)  
Commodity | NGL | Long    
Derivatives    
Notional amount (in gallons and mmbls) | gal 25.1  
Fair Value $ 1.9  
Commodity | Natural Gas | Short    
Derivatives    
Notional amount (in mmbtu) | MMBTU 20.5  
Fair Value $ 1.3  
Commodity | Natural Gas | Long    
Derivatives    
Notional amount (in mmbtu) | MMBTU 23.2  
Fair Value $ (0.7)  
Commodity | Condensate | Short    
Derivatives    
Notional amount (in gallons and mmbls) | MMBbls 0.1  
Fair Value $ (0.1)