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Retirement And Other Postretirement Benefits (Tables)
3 Months Ended
Mar. 31, 2013
Defined Benefit Plan Disclosure [Line Items]  
Reclassification Out Of Accumulated Other Comprehensive Income
Parent Company [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Reclassification Out Of Accumulated Other Comprehensive Income
Entergy Gulf States Louisiana [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Reclassification Out Of Accumulated Other Comprehensive Income
Entergy Louisiana [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Reclassification Out Of Accumulated Other Comprehensive Income