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Stock-Based Compensation (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Restricted Awards [Member]
Employee service share-based compensation, aggregate disclosures
Compensation expense included in Entergy's Consolidated Net Income	$ 3.7	$ 3.9	$ 2.0
Tax benefit recognized in Entergy's Consolidated Net Income	1.4	1.5	0.8
Compensation cost capitalized as part of fixed assets and inventory	0.7	0.9	0.5
Restricted Stock Awards [Member]
Employee service share-based compensation, aggregate disclosures
Compensation expense included in Entergy's Consolidated Net Income	3.9	0	0
Tax benefit recognized in Entergy's Consolidated Net Income	1.5	0	0
Compensation cost capitalized as part of fixed assets and inventory	$ 0.7	$ 0	$ 0

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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