Income Taxes (Schedule Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross balance January 1	$ 5,699,339	$ 7,383,154	$ 7,181,482
Additions based on tax positions related to the current year	101,623	669,207	731,276
Additions for tax positions of prior years	33,419	98,591	151,628
Reductions for tax positions of prior years	(74,413)	(935,735)	(681,232)
Settlements	0	(1,515,878)	0
Gross balance at December 31	5,759,968	5,699,339	7,383,154
Unrecognized tax benefits net of unused tax attributes and payments	712,169	979,125	1,541,567
Remaining balances of unrecognized tax benefits, effective income tax rates	3,504,000	3,491,000	4,962,000
Net operating loss carryforwards	2,868,424	1,580,109
Offset to gross unrecognized tax benefits, credit and loss carryforward	(4,987,799)	(4,710,214)	(5,831,587)
Cash Paid To Taxing Authorities	60,000	10,000	10,000
Entergy Arkansas [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross balance January 1	1,364,635	1,341,242	1,298,662
Additions based on tax positions related to the current year	30,419	9,403	84,335
Additions for tax positions of prior years	15,013	13,400	20,399
Reductions for tax positions of prior years	(1,573)	(11,346)	(62,154)
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities		11,936
Gross balance at December 31	1,408,494	1,364,635	1,341,242
Unrecognized tax benefits net of unused tax attributes and payments	415,851	252,007	207,055
Net operating loss carryforwards	275,054	119,555
Offset to gross unrecognized tax benefits, credit and loss carryforward	(992,643)	(1,112,628)	(1,134,187)
Entergy Louisiana [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross balance January 1	640,295	2,381,653	2,400,171
Additions based on tax positions related to the current year	13,437	35,681	28,705
Additions for tax positions of prior years	9,304	10,508	25,090
Reductions for tax positions of prior years	(58,408)	(679,601)	(72,313)
Settlements		(1,107,946)
Gross balance at December 31	604,628	640,295	2,381,653
Unrecognized tax benefits net of unused tax attributes and payments	0	0	808,396
Net operating loss carryforwards	1,228,547	363,806
Offset to gross unrecognized tax benefits, credit and loss carryforward	(604,628)	(640,295)	(1,573,257)
Entergy Mississippi [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross balance January 1	549,717	566,287	508,765
Additions based on tax positions related to the current year	684	5,619	68,594
Additions for tax positions of prior years	1,504	1,156	1,651
Reductions for tax positions of prior years	(2,336)	(24,173)	(12,723)
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities		828
Gross balance at December 31	549,569	549,717	566,287
Unrecognized tax benefits net of unused tax attributes and payments	160,841	84,038	59,311
Net operating loss carryforwards	166,008	54,262
Offset to gross unrecognized tax benefits, credit and loss carryforward	(388,728)	(465,679)	(506,976)
Entergy New Orleans [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross balance January 1	639,546	716,773	686,687
Additions based on tax positions related to the current year	1,050	2,430	40,676
Additions for tax positions of prior years	6	294	489
Reductions for tax positions of prior years	(1,105)	(80,267)	(11,079)
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities		316
Gross balance at December 31	639,497	639,546	716,773
Unrecognized tax benefits net of unused tax attributes and payments	154,598	187,624	271,343
Net operating loss carryforwards	105,549	26,564
Offset to gross unrecognized tax benefits, credit and loss carryforward	(484,899)	(451,922)	(445,430)
Entergy Texas [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross balance January 1	521,932	21,406	17,802
Additions based on tax positions related to the current year	32,616	504,362	2,312
Additions for tax positions of prior years	2,315	799	1,299
Reductions for tax positions of prior years	(4,568)	(5,559)	(7)
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities		924
Gross balance at December 31	552,295	521,932	21,406
Unrecognized tax benefits net of unused tax attributes and payments	11,601	14,212	17,462
Net operating loss carryforwards	81	53,052
Offset to gross unrecognized tax benefits, credit and loss carryforward	(540,694)	(507,720)	(3,944)
System Energy [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross balance January 1	21,652	473,331	467,487
Additions based on tax positions related to the current year	1,753	4,013	5,496
Additions for tax positions of prior years	1,897	4,606	2,186
Reductions for tax positions of prior years	(1,946)	(41,466)	(1,838)
Settlements		(418,832)
Gross balance at December 31	23,356	21,652	473,331
Unrecognized tax benefits net of unused tax attributes and payments	14,780	14,239	464,939
Net operating loss carryforwards	0	0
Offset to gross unrecognized tax benefits, credit and loss carryforward	$ (8,576)	$ (7,413)	$ (8,392)