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Business Segment Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Jul. 31, 2013 position	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Restructuring costs incurred, pre-tax		$ 20us-gaap_RestructuringCharges	$ 110us-gaap_RestructuringCharges
Restructuring costs incurred, net of tax		12etr_RestructuringChargesNetOfTax	70etr_RestructuringChargesNetOfTax
Number of employee positions eliminated	800
Utility Plants [Member]
Segment Reporting Information [Line Items]
Restructuring costs incurred, pre-tax		15	85
Restructuring costs incurred, net of tax		9	55
Entergy Wholesale Commodities [Member]
Segment Reporting Information [Line Items]
Restructuring costs incurred, pre-tax		5	25
Restructuring costs incurred, net of tax		$ 3	$ 15

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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