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
Mar. 31, 2015	Mar. 31, 2014
Parent Company [Member] \| Restricted Stock Awards [Member]
Employee service share-based compensation, aggregate disclosures
Compensation expense included in Entergy's net income	$ 8.1	$ 7.4
Tax benefit recognized in Entergy's net income	3.1	2.9
Compensation cost capitalized as part of fixed assets and inventory	$ 1.5	$ 1.1

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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

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-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

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-Publisher FASB

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

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- Definition

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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- Definition

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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