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Commitments and Contingencies Commitments And Contingencies (Narrative) (Details) (Details) - USD ($)
$ in Millions
1 Months Ended
Oct. 31, 2016
Sep. 30, 2016
Apr. 30, 2016
River Bend [Member] | Entergy Louisiana [Member]      
Regulatory Assets [Line Items]      
Litigation Settlement, Amount   $ 5 $ 42
Damages awarded for previously recorded operation and maintenance   3  
Damages awarded for previously recorded nuclear fuel expense   2  
Palisades [Member] | Entergy Wholesale Commodities [Member]      
Regulatory Assets [Line Items]      
Litigation Settlement, Amount   14  
Damages awarded for previously capitalized costs   11  
Damages awarded for previously recorded operation and maintenance   $ 3  
Indian Point 2 [Member] | Entergy Wholesale Commodities [Member]      
Regulatory Assets [Line Items]      
Litigation Settlement, Amount $ 34    
Damages awarded for previously capitalized costs 14    
Damages awarded for previously recorded operation and maintenance 15    
Damages awarded for previously recorded decommissioning expense 3    
Damages awarded for previously recorded taxes other than income taxes $ 2