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Debt (Schedule Of Debt Assumed) (Details) (EnLink [Member], USD $)
0 Months Ended 9 Months Ended
Mar. 07, 2014
Sep. 30, 2014
Debt Instrument [Line Items]    
Fair value of debt $ 1,454,000,000  
8.875% Due February 15, 2018 [Member]
   
Debt Instrument [Line Items]    
Debt interest rate, stated percentage   8.875% [1]
Debt, maturity date   Feb. 15, 2018 [1]
Debt instrument, face amount 725,000,000 [1]  
Fair value of debt 760,000,000 [1]  
Effective rate of debt 7.70% [1]  
7.125% Due June 1, 2022 [Member]
   
Debt Instrument [Line Items]    
Debt interest rate, stated percentage   7.125%
Debt, maturity date   Jun. 01, 2022
Debt instrument, face amount 197,000,000  
Fair value of debt 226,000,000  
Effective rate of debt 5.30%  
Credit Facilities [Member]
   
Debt Instrument [Line Items]    
Fair value of debt $ 468,000,000  
[1] The 2018 senior notes were redeemed on April 18, 2014.