Related Party Transactions (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 1 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jan. 31, 2014
Related party transactions      
Capital expenditures $ 432 $ 459  
Affiliate Supply Agreement | Eagle Ford drilling operations      
Related party transactions      
Capital expenditures 7    
Number of supply agreements 2    
Management Fee Agreement | Sponsors      
Related party transactions      
Transaction fee paid     6.25
Capital expenditures     $ 83