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Stock Based Compensation (Details 1) (Restricted Awards [Member], USD $)
In Millions
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2011
Restricted Awards [Member]
  
Employee service share-based compensation, aggregate disclosures  
Compensation expense included in Entergy's Net Income for the third quarter$ 1.0$ 2.9
Tax benefit recognized in Entergy's Net Income for the third quarter0.41.1
Compensation cost capitalized as part of fixed assets and inventory as of September 30, $ 0.5