Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Schedule Of Actuarially Estimated Effect Of Future Medicare Subsidies And The Actual Subsidies Received) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Entergy Arkansas [Member]
Medicare subsidies received	$ 737
Entergy Gulf States Louisiana [Member]
Medicare subsidies received	410
Entergy Louisiana [Member]
Medicare subsidies received	513
Entergy Mississippi [Member]
Medicare subsidies received	245
Entergy New Orleans [Member]
Medicare subsidies received	194
Entergy Texas [Member]
Medicare subsidies received	334
System Energy [Member]
Medicare subsidies received	105
APBO [Member] | Entergy Arkansas [Member]
Actuarially estimated effect of future Medicare subsidies	(9,639)	(62,877)
APBO [Member] | Entergy Gulf States Louisiana [Member]
Actuarially estimated effect of future Medicare subsidies	(4,875)	(32,055)
APBO [Member] | Entergy Louisiana [Member]
Actuarially estimated effect of future Medicare subsidies	(5,580)	(36,015)
APBO [Member] | Entergy Mississippi [Member]
Actuarially estimated effect of future Medicare subsidies	(3,060)	(19,507)
APBO [Member] | Entergy New Orleans [Member]
Actuarially estimated effect of future Medicare subsidies	(1,769)	(10,902)
APBO [Member] | Entergy Texas [Member]
Actuarially estimated effect of future Medicare subsidies	(3,324)	(21,164)
APBO [Member] | System Energy [Member]
Actuarially estimated effect of future Medicare subsidies	(1,973)	(13,586)
Other Postretirement [Member]
Medicare subsidies received	3,310	5,999
Other Postretirement [Member] | Entergy Arkansas [Member]
Actuarially estimated effect of future Medicare subsidies	(4,732)	(5,791)	6,309
Medicare subsidies received	737	1,331
Other Postretirement [Member] | Entergy Gulf States Louisiana [Member]
Actuarially estimated effect of future Medicare subsidies	(2,988)	(3,660)	(3,923)
Medicare subsidies received	410	779
Other Postretirement [Member] | Entergy Louisiana [Member]
Actuarially estimated effect of future Medicare subsidies	(3,025)	(3,643)	(3,889)
Medicare subsidies received	513	908
Other Postretirement [Member] | Entergy Mississippi [Member]
Actuarially estimated effect of future Medicare subsidies	(1,503)	(1,799)	(2,016)
Medicare subsidies received	245	434
Other Postretirement [Member] | Entergy New Orleans [Member]
Actuarially estimated effect of future Medicare subsidies	(729)	(995)	(1,170)
Medicare subsidies received	194	396
Other Postretirement [Member] | Entergy Texas [Member]
Actuarially estimated effect of future Medicare subsidies	(1,045)	(1,321)	(1,528)
Medicare subsidies received	334	644
Other Postretirement [Member] | System Energy [Member]
Actuarially estimated effect of future Medicare subsidies	(1,093)	(1,400)	(1,403)
Medicare subsidies received	$ 105	$ 170