Income Taxes (Schedule Of Income Tax Expenses From Continuing Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Federal	$ (14,416)	$ 36,848	$ 29,595
State	6,535	7,274	15,478
Total	(7,881)	44,122	45,073
Deferred and non-current -- net	(155,956)	(1,074,416)	505,010
Investment tax credit adjustments - net	(5,988)	(6,532)	(7,513)
Income Tax Expense (Benefit)	(169,825)	(1,036,826)	542,570
Entergy Arkansas [Member]
Federal	(14,549)	(23,638)	16,086
State	(714)	(1,617)	9,191
Total	(15,263)	(25,255)	25,277
Deferred and non-current -- net	(30,278)	(270,586)	69,753
Investment tax credit adjustments - net	(1,228)	(1,226)	(1,226)
Income Tax Expense (Benefit)	(46,769)	(297,067)	93,804
Entergy Louisiana [Member]
Federal	(20,173)	(15,841)	(84,250)
State	(735)	(1,122)	1,480
Total	(20,908)	(16,963)	(82,770)
Deferred and non-current -- net	147,453	(32,725)	572,988
Investment tax credit adjustments - net	(4,922)	(4,923)	(4,920)
Income Tax Expense (Benefit)	121,623	(54,611)	485,298
Entergy Mississippi [Member]
Federal	(8,939)	(11,275)	(8,845)
State	5,823	(1,066)	(924)
Total	(3,116)	(12,341)	(9,769)
Deferred and non-current -- net	34,579	(114,738)	83,501
Investment tax credit adjustments - net	(597)
Deferred Other Tax Expense (Benefit)		1,306	187
Income Tax Expense (Benefit)	30,866	(125,773)	73,919
Entergy New Orleans [Member]
Federal	(5,822)	(10,813)	(30,635)
State	1,856	545	(728)
Total	(3,966)	(10,268)	(31,363)
Deferred and non-current -- net	4,248	7,943	62,946
Investment tax credit adjustments - net	(96)	(111)
Deferred Other Tax Expense (Benefit)			1,695
Income Tax Expense (Benefit)	186	(2,436)	33,278
Entergy Texas [Member]
Federal	16,035	16,190	6,034
State	663	3,205	310
Total	16,698	19,395	6,344
Deferred and non-current -- net	(69,963)	(44,817)	43,102
Investment tax credit adjustments - net	(631)	(821)	(965)
Income Tax Expense (Benefit)	(53,896)	(26,243)	48,481
System Energy [Member]
Federal	16,256	(9,786)	47,674
State	(2,831)	(1,821)	5,314
Total	13,425	(11,607)	52,988
Deferred and non-current -- net	422	(35,329)	19,243
Investment tax credit adjustments - net		(739)	(2,262)
Deferred Other Tax Expense (Benefit)	1,502
Income Tax Expense (Benefit)	$ 15,349	$ (47,675)	$ 69,969

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