Commitments And Contingencies (Narrative) (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended		1 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2013 Parent Company [Member]	Sep. 30, 2013 Parent Company [Member]	Sep. 30, 2014 Entergy Mississippi [Member]	Oct. 31, 2014 Entergy Mississippi [Member] Subsequent Event [Member]	Sep. 30, 2014 Entergy Arkansas [Member]	Sep. 30, 2013 Entergy Arkansas [Member]	Sep. 30, 2014 Minimum [Member] Entergy Mississippi [Member]	Sep. 30, 2014 Maximum [Member] Entergy Mississippi [Member]
Regulatory Assets [Line Items]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments					$ (1,304,000)	$ (1,304,000)
Stock Options Excluded From Diluted Common Shares Outstanding Calculation	5.2	8.8	6.6	8.9
Commitments and Contingencies Disclosure [Abstract]
Estimated cost to restore ANO to service									95,000,000
Authorized deferred fuel balance retained related to ANO stator incident									65,900,000
Course of construction sublimit									50,000,000
Proceeds from insurance settlement, operating and investing activities									40,000,000
Proceeds from insurance			33,350,000	0					29,280,000	0
Estimated cost to restore Baxter Wilson to service											45,000,000	60,000,000
Property insurance deductible							20,000,000
Property Insurance Receivable							18,000,000
Total spending for Baxter Wilson recovery							38,000,000
Capital expense related to Baxter Wilson recovery							8,000,000
Operation and maintenance expense incurred for Baxter Wilson recovery							10,000,000
MSPC authorized deferral of other operation and maintenance expenses								$ 6,000,000