Rate And Regulatory Matters (Calendar Year 2011 Production Costs) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Oct. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007
Entergy Arkansas [Member]
Regulatory Assets [Line Items]
Payments (receipts) based on production costs	$ 0	$ 41	$ 77	$ 156	$ 41	$ 390	$ 252	$ 252
Entergy Gulf States Louisiana [Member]
Regulatory Assets [Line Items]
Payments (receipts) based on production costs	0	0	(12)	(75)	0	(107)	(124)	(120)
Entergy Louisiana [Member]
Regulatory Assets [Line Items]
Payments (receipts) based on production costs	0	(41)	0	0	(22)	(140)	(36)	(91)
Entergy Mississippi [Member]
Regulatory Assets [Line Items]
Payments (receipts) based on production costs	0	0	(40)	(33)	(19)	(24)	(20)	(41)
Entergy New Orleans [Member]
Regulatory Assets [Line Items]
Payments (receipts) based on production costs	(15)	0	(25)	(5)	0	0	(7)	0
Entergy Texas [Member]
Regulatory Assets [Line Items]
Payments (receipts) based on production costs	$ 15	$ 0	$ 0	$ (43)	$ 0	$ (119)	$ (65)	$ (30)