Rate And Regulatory Matters (Correction Of Regulatory Asset For Income Taxes, Statement Of Changes In Equity) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Beginning Balance			$ 9,291,089	$ 9,055,270
Net income	168,055	370,583	335,038	223,844
Ending Balance	9,368,517	9,123,996	9,368,517	9,123,996
Entergy Arkansas [Member]
Beginning Balance			1,579,616	1,444,124
Net income	40,483	45,755	55,202	59,629
Ending Balance	1,616,381	1,500,316	1,616,381	1,500,316
Entergy Gulf States Louisiana [Member]
Beginning Balance			1,383,004	1,333,776
Net income	29,720	50,389	56,885	78,748
Ending Balance	1,321,474	1,402,035	1,321,474	1,402,035
Entergy Gulf States Louisiana [Member] | Member's Equity [Member]
Beginning Balance			1,438,233	1,393,386
Net income			56,885	78,748
Ending Balance	1,374,786	1,450,110	1,374,786	1,450,110
Entergy Louisiana [Member]
Beginning Balance			3,070,496	2,564,929
Net income	61,377	130,714	106,753	164,009
Ending Balance	2,953,280	2,726,123	2,953,280	2,726,123
Entergy Louisiana [Member] | Member's Equity [Member]
Beginning Balance			3,016,628	2,504,436
Net income			106,753	164,009
Ending Balance	2,898,051	2,664,370	2,898,051	2,664,370
Entergy Mississippi [Member]
Beginning Balance			879,646	835,706
Net income	18,954	15,914	32,888	24,596
Ending Balance	903,720	858,888	903,720	858,888
Entergy New Orleans
Beginning Balance			195,565	181,165
Net income	598	7,186	1,905	7,226
Ending Balance	196,988	186,209	196,988	186,209
Entergy Texas [Member]
Beginning Balance			854,146	899,355
Net income	10,953	16,204	11,875	17,948
Ending Balance	866,021	872,303	866,021	872,303
System Energy [Member]
Beginning Balance			832,729	800,563
Net income	27,734	35,368	55,740	61,904
Ending Balance	$ 838,469	$ 829,717	$ 838,469	$ 829,717