Stock-Based Compensation (Schedule Of Financial Information Of Options) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense included in Entergy's Consolidated Net Income for the year	$ 4.1	$ 4.1	$ 7.7
Tax benefit (expense) recognized in Entergy's Consolidated Net Income for the year	1.6	1.6	3.0
Compensation cost capitalized as part of fixed assets and inventory	0.7	0.7	1.5
Restricted Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense included in Entergy's Consolidated Net Income for the year	19.3	16.4	11.4
Tax benefit (expense) recognized in Entergy's Consolidated Net Income for the year	7.5	6.3	4.4
Compensation cost capitalized as part of fixed assets and inventory	3.1	2.6	2.0
Long-Term Incentive Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards	23.4	11.1	4.3
Compensation expense included in Entergy's Consolidated Net Income for the year	10.7	6.0	(5.0)
Tax benefit (expense) recognized in Entergy's Consolidated Net Income for the year	4.1	2.3	(1.9)
Compensation cost capitalized as part of fixed assets and inventory	1.5	0.9	(0.9)
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards	3.3	2.5	3.0
Compensation expense included in Entergy's Consolidated Net Income for the year	2.2	1.4	1.3
Tax benefit (expense) recognized in Entergy's Consolidated Net Income for the year	0.9	0.6	0.5
Compensation cost capitalized as part of fixed assets and inventory	$ 0.3	$ 0.2	$ 0.2

Employee service share based compensation awards fair value.

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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.

+ References

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

+ References

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