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Derivative Financial Instruments (Schedule Of Derivative Financial Instruments Included In The Consolidated Balance Sheets) (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Derivatives, Fair Value [Line Items]    
Fair value of derivative assets $ 310 $ 103
Fair value of derivative liabilities 84 121
Commodity Derivatives [Member] | Other Current Assets [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative assets 231 75
Commodity Derivatives [Member] | Other Long-Term Assets [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative assets 66 28
Commodity Derivatives [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative liabilities 30 58
Commodity Derivatives [Member] | Other Long-Term Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative liabilities 50 62
Interest Rate Derivatives [Member] | Other Current Assets [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative assets 1  
Interest Rate Derivatives [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative liabilities 1  
Interest Rate Derivatives [Member] | Other Long-Term Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative liabilities 1  
Foreign Currency Derivatives [Member] | Other Current Assets [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative assets 11  
Foreign Currency Derivatives [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative liabilities   1
EnLink [Member] | Commodity Derivatives [Member] | Other Current Assets [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative assets 1  
EnLink [Member] | Commodity Derivatives [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative liabilities 1  
EnLink [Member] | Commodity Derivatives [Member] | Other Long-Term Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Fair value of derivative liabilities $ 1