Income Taxes (Schedule Of Income Tax Expenses From Continuing Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Federal	$ 45,249	$ 77,166	$ 90,061
Foreign	68	97	90
State	(14,960)	157,829	(12,637)
Total	30,357	235,092	77,514
Deferred and non-current -- net	(840,465)	(864,799)	528,326
Investment tax credit adjustments - net	(7,151)	(13,220)	(16,243)
Income Tax Expense (Benefit)	(817,259)	(642,927)	589,597
Entergy Arkansas [Member]
Federal	(14,748)	66,966	(34,258)
State	2,805	6,265	(678)
Total	(11,943)	73,231	(34,936)
Deferred and non-current -- net	120,942	(31,463)	119,841
Investment tax credit adjustments - net	(1,226)	(1,227)	(1,276)
Income Tax Expense (Benefit)	107,773	40,541	83,629
Entergy Louisiana [Member]
Federal	(124,113)	101,382	(44,909)
State	10,757	35,406	(1,191)
Total	(113,356)	136,788	(46,100)
Deferred and non-current -- net	208,157	47,220	236,794
Investment tax credit adjustments - net	(5,067)	(5,337)	(5,642)
Income Tax Expense (Benefit)	89,734	178,671	185,052
Entergy Mississippi [Member]
Federal	10,603	25,628	8,103
State	2,257	6,832	7,474
Total	12,860	32,460	15,577
Deferred and non-current -- net	46,984	31,149	42,305
Investment tax credit adjustments - net	4,010	(1,737)	(2,172)
Income Tax Expense (Benefit)	63,854	61,872	55,710
Entergy New Orleans [Member]
Federal	(91,067)	(9,346)	(1,428)
State	566	1,784	510
Total	(90,501)	(7,562)	(918)
Deferred and non-current -- net	119,345	32,890	14,592
Investment tax credit adjustments - net	(139)	(138)	(224)
Income Tax Expense (Benefit)	28,705	25,190	13,450
Entergy Texas [Member]
Federal	19,656	53,313	48,610
State	1,374	2,450	4,877
Total	21,030	55,763	53,487
Deferred and non-current -- net	42,982	(17,599)	(2,418)
Investment tax credit adjustments - net	(915)	(914)	(1,425)
Income Tax Expense (Benefit)	63,097	37,250	49,644
System Energy [Member]
Federal	29,628	(63,302)	19,908
State	(25,825)	26,755	15,379
Total	3,803	(36,547)	35,287
Deferred and non-current -- net	71,051	93,491	53,501
Investment tax credit adjustments - net	(3,793)	(3,867)	(5,478)
Income Tax Expense (Benefit)	$ 71,061	$ 53,077	$ 83,310