Income Taxes (Schedule Of Income Tax Expenses From Continuing Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal	$ 5,807	$ (14,416)	$ 36,848
State	57,939	6,535	7,274
Total	63,746	(7,881)	44,122
Deferred and non-current -- net	(190,635)	(155,956)	(1,074,416)
Investment tax credit adjustments - net		(5,988)	(6,532)
Deferred Other Tax Expense (Benefit)	5,383
Income Tax Expense (Benefit)	(121,506)	(169,825)	(1,036,826)
Entergy Arkansas [Member]
Federal	(44,627)	(14,549)	(23,638)
State	(2,563)	(714)	(1,617)
Total	(47,190)	(15,263)	(25,255)
Deferred and non-current -- net	96,195	(30,278)	(270,586)
Investment tax credit adjustments - net	(1,228)	(1,228)	(1,226)
Income Tax Expense (Benefit)	47,777	(46,769)	(297,067)
Entergy Louisiana [Member]
Federal	62,728	(20,173)	(15,841)
State	4,457	(735)	(1,122)
Total	67,185	(20,908)	(16,963)
Deferred and non-current -- net	(444,647)	147,453	(32,725)
Investment tax credit adjustments - net	(4,862)	(4,922)	(4,923)
Income Tax Expense (Benefit)	(382,324)	121,623	(54,611)
Entergy Mississippi [Member]
Federal	(14,580)	(8,939)	(11,275)
State	(1,316)	5,823	(1,066)
Total	(15,896)	(3,116)	(12,341)
Deferred and non-current -- net	43,640	34,579	(114,738)
Investment tax credit adjustments - net	(554)	(597)
Deferred Other Tax Expense (Benefit)			1,306
Income Tax Expense (Benefit)	27,190	30,866	(125,773)
Entergy New Orleans [Member]
Federal	293	(5,822)	(10,813)
State	(303)	1,856	545
Total	(10)	(3,966)	(10,268)
Deferred and non-current -- net	(18,153)	4,248	7,943
Investment tax credit adjustments - net		(96)	(111)
Deferred Other Tax Expense (Benefit)	13,956
Income Tax Expense (Benefit)	(4,207)	186	(2,436)
Entergy Texas [Member]
Federal	(5,603)	16,035	16,190
State	2,658	663	3,205
Total	(2,945)	16,698	19,395
Deferred and non-current -- net	6,619	(69,963)	(44,817)
Investment tax credit adjustments - net	(632)	(631)	(821)
Income Tax Expense (Benefit)	3,042	(53,896)	(26,243)
System Energy [Member]
Federal	372,206	16,256	(9,786)
State	55,551	(2,831)	(1,821)
Total	427,757	13,425	(11,607)
Deferred and non-current -- net	(405,928)	422	(35,329)
Investment tax credit adjustments - net	(1,286)		(739)
Deferred Other Tax Expense (Benefit)		1,502
Income Tax Expense (Benefit)	$ 20,543	$ 15,349	$ (47,675)