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Acquisitions And Divestitures (Purchase Price Allocation Of Enlink's Acquisition Activity) (Details) - USD ($)
$ in Millions
1 Months Ended
Mar. 16, 2015
Jan. 31, 2015
May. 31, 2015
Feb. 28, 2015
Sep. 30, 2015
Dec. 31, 2014
Business Acquisition [Line Items]            
Goodwill         $ 5,775 $ 6,303
EnLink [Member] | LPC Crude Oil Marketing LLC [Member]            
Business Acquisition [Line Items]            
Cash   $ 108        
PP&E   30        
Goodwill   30        
Intangibles   43        
Current assets   $ 5        
EnLink [Member] | Coronado Midstream Holdings LLC [Member]            
Business Acquisition [Line Items]            
Cash $ 240          
Common units value 360          
PP&E 302          
Goodwill 18          
Intangibles 281          
Current liabilities $ (1)          
EnLink [Member] | EnLink Midstream Holdings [Member]            
Business Acquisition [Line Items]            
Common units value     $ 900 $ 925