Stock-Based Compensation (Financial Information For Other Equity Plans) (Details) (Parent Company [Member], Restricted Stock Awards [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Parent Company [Member] | Restricted Stock Awards [Member]
Employee service share-based compensation, aggregate disclosures
Compensation expense included in Entergy's net income	$ 7.6	$ 5.7	$ 22.7	$ 17.5
Tax benefit recognized in Entergy's net income	2.9	2.2	8.8	6.8
Compensation cost capitalized as part of fixed assets and inventory	$ 1.2	$ 0.9	$ 3.5	$ 2.7