Asset Retirement Obligations (Fair Values Of Decommissioning Trust Funds And Related Asset Retirement Obligation Regulatory Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
ANO 1 and ANO 2 [Member]
Asset Retirement Obligations [Line Items]
Decommissioning Trust Fair Values	$ 769.9	$ 710.9
Regulatory Asset	247.6	219.1
River Bend [Member]
Asset Retirement Obligations [Line Items]
Decommissioning Trust Fair Values	637.7	573.7
Regulatory Liabilities	(25.5)	(28.7)
Waterford 3 [Member]
Asset Retirement Obligations [Line Items]
Decommissioning Trust Fair Values	383.6	347.3
Regulatory Asset	145.5	128.5
Grand Gulf [Member]
Asset Retirement Obligations [Line Items]
Decommissioning Trust Fair Values	679.8	603.9
Regulatory Asset	80.4	60.8
Entergy Wholesale Commodities [Member]
Asset Retirement Obligations [Line Items]
Decommissioning Trust Fair Values	$ 2,899.9	$ 2,667.3

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The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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- Definition

The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 980

-SubTopic 340

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382

+ Details

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- Definition

The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 980

-SubTopic 405

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394

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