v2.4.0.8
Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Operating Loss Carryforwards [Line Items]    
Income Tax Expense (Benefit) $ 200 $ 279
Effective tax rate 25.00% 30.00%
Federal statutory income tax rate 35.00% 35.00%
Florida Gas Pipeline [Member]
   
Operating Loss Carryforwards [Line Items]    
Ownership interest   50.00%
EPNG and EP Midstream [Member]
   
Operating Loss Carryforwards [Line Items]    
Ownership interest   50.00%