Income Taxes (Significant Components Of Accumulated Deferred Income Taxes And Taxes Accrued) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Plant basis differences - net	$ (5,270,010)	$ (6,136,563)
Regulatory assets for income taxes - net	(937,554)	(930,244)
Nuclear decommissioning trusts	(318,570)	(656,185)
Pension, net funding	(336,496)	(322,788)
Combined unitary state taxes	(10,335)	(7,255)
Deferred Tax Liability, Deferred Fuel	(181,222)	(85,310)
Other	(333,421)	(341,450)
Total	(7,426,814)	(8,687,038)
Regulatory liabilities	1,108,075	1,318,381
Pension and other post-employment benefits	141,399	208,128
Sale and leaseback	0	102,474
Compensation	76,317	79,798
Accumulated deferred investment tax credit	57,501	57,986
Provision for allowances and contingencies	97,545	82,286
Deferred Tax Assets, Power Purchase Arrangements	0	55,259
Net operating loss carryforwards	2,065,149	2,868,424
Capital losses and miscellaneous tax credits	28,876	11,111
Valuation allowance	(372,017)	(325,239)
Other	245,236	200,032
Deferred Tax Assets, Net of Valuation Allowance	3,643,187	4,963,459
Non-current accrued taxes (including unrecognized tax benefits)	(951,110)	(929,032)
Deferred Tax Liabilities, Deferred Expense	(3,993)	0
Deferred Tax Liabilities, Accumulated Storm Damage Provision	35,213	207,243
Deferred tax asset Nuclear Decommissioning Liabilities	173,201	278,136
Deferred Tax Liabilities, Net, Noncurrent	(4,734,737)	(4,652,611)
Deferred Tax Asset, Unbilled Revenue	21,905	26,683
Entergy Arkansas [Member]
Plant basis differences - net	(1,181,456)	(1,158,523)
Regulatory assets for income taxes - net	(244,624)	(226,687)
Nuclear decommissioning trusts	(107,858)	(175,882)
Pension, net funding	(93,139)	(92,881)
Deferred fuel	(35,205)	(27,497)
Other	(76,813)	(77,820)
Total	(1,747,391)	(1,759,290)
Regulatory liabilities	236,318	310,256
Deferred tax Liability, Accrued Tax Expense, Compensation and Benefits Pensions	(28,463)	(26,577)
Sale and leaseback		0
Compensation	3,361	3,347
Accumulated deferred investment tax credit	7,171	7,518
Provision for allowances and contingencies	26,432	24,829
Deferred Tax Assets, Power Purchase Arrangements		0
Net operating loss carryforwards	10,491	275,054
Other	24,969	19,397
Deferred Tax Assets, Net of Valuation Allowance	426,708	740,723
Accrued Income Taxes, Noncurrent	177,551	397,634
Deferred Tax Assets, Deferred Income	6,211	3,331
Deferred Tax Liabilities, Accumulated Storm Damage Provision	0	0
Deferred Tax Liabilities, Power Purchase Agreements	(8,296)
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	719	0
Deferred tax asset Nuclear Decommissioning Liabilities	139,499	123,568
Deferred Tax Liabilities, Net, Noncurrent	(1,498,234)	(1,416,201)
Entergy Louisiana [Member]
Plant basis differences - net	(2,513,138)	(3,429,473)
Regulatory assets for income taxes - net	(457,102)	(530,274)
Nuclear decommissioning trusts	(118,172)	(186,382)
Pension, net funding	(82,891)	(93,681)
Deferred fuel	(49,792)	(13,686)
Other	(126,350)	(138,299)
Total	(3,389,963)	(4,585,762)
Regulatory liabilities	508,594	634,184
Deferred tax liability nuclear decommissioning liabilities		(909)
Pension and other post-employment benefits	52,414	73,006
Sale and leaseback		0
Compensation	5,207	5,288
Accumulated deferred investment tax credit	29,271	30,666
Provision for allowances and contingencies	15,741	21,768
Deferred Tax Assets, Power Purchase Arrangements		0
Net operating loss carryforwards	307,175	1,228,547
Other	41,310	5,968
Deferred Tax Assets, Net of Valuation Allowance	972,964	2,013,578
Deferred Tax Liabilities, Prepaid Expenses	42,121	138,330
Deferred Tax Assets, Deferred Income		9,919
Deferred Tax Liabilities, Deferred Expense	(2,405)
Deferred Tax Liabilities, Accumulated Storm Damage Provision	31,337	193,967
Deferred Tax Liabilities, Power Purchase Agreements	(11,181)
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	2,774	5,141
Deferred tax asset Nuclear Decommissioning Liabilities	12,883
Deferred Tax Liabilities, Net, Noncurrent	(2,374,878)	(2,433,854)
Entergy Mississippi [Member]
Plant basis differences - net	(691,675)	(681,968)
Regulatory assets for income taxes - net	(44,358)	(34,799)
Nuclear decommissioning trusts	0	0
Pension, net funding	(22,256)	(22,253)
Deferred fuel	(37,333)	(30,409)
Other	(26,752)	(29,108)
Total	(822,374)	(798,537)
Regulatory liabilities	54,454	59,418
Deferred tax Liability, Accrued Tax Expense, Compensation and Benefits Pensions	(9,196)	(7,793)
Sale and leaseback		0
Compensation	2,316	2,181
Accumulated deferred investment tax credit	3,641	2,723
Provision for allowances and contingencies	10,300	10,236
Deferred Tax Assets, Power Purchase Arrangements		1,140
Net operating loss carryforwards	10,140	166,008
Other	6,849	2,891
Deferred Tax Assets, Net of Valuation Allowance	89,483	240,369
Accrued Income Taxes, Noncurrent	47,139	161,929
Deferred Tax Assets, Deferred Income	5,826	2,306
Deferred Tax Liabilities, Accumulated Storm Damage Provision	0	0
Deferred Tax Liabilities, Power Purchase Agreements	0
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	5,152	1,258
Deferred tax asset Nuclear Decommissioning Liabilities	1	1
Deferred Tax Liabilities, Net, Noncurrent	(780,030)	(720,097)
Entergy New Orleans [Member]
Plant basis differences - net	(115,841)	(192,660)
Regulatory assets for income taxes - net	(24,738)	(30,694)
Nuclear decommissioning trusts	0	0
Pension, net funding	(9,604)	(11,429)
Deferred fuel	(2,560)	(1,600)
Other	(21,977)	(33,071)
Total	(184,092)	(269,454)
Regulatory liabilities	27,438	36,057
Deferred tax liability nuclear decommissioning liabilities		(433)
Deferred tax Liability, Accrued Tax Expense, Compensation and Benefits Pensions	(18,114)	(16,090)
Sale and leaseback		0
Compensation	1,107	1,036
Accumulated deferred investment tax credit	4,438	4,391
Provision for allowances and contingencies	26,671	5,559
Deferred Tax Assets, Power Purchase Arrangements		0
Net operating loss carryforwards	12,146	105,549
Other	11,105	7,788
Deferred Tax Assets, Net of Valuation Allowance	79,887	155,805
Accrued Income Taxes, Noncurrent	281,054	251,735
Deferred Tax Assets, Deferred Income	4,090	971
Deferred Tax Liabilities, Accumulated Storm Damage Provision	0	0
Deferred Tax Liabilities, Power Purchase Agreements	(9,372)
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	11,006	10,977
Deferred tax asset Nuclear Decommissioning Liabilities	0
Deferred Tax Liabilities, Net, Noncurrent	(385,259)	(365,384)
Entergy Texas [Member]
Plant basis differences - net	(614,134)	(654,252)
Regulatory assets for income taxes - net	(95,717)	(45,470)
Nuclear decommissioning trusts	0	0
Pension, net funding	(18,111)	(19,914)
Deferred fuel	(54,204)	(10,139)
Other	(4,126)	(2,526)
Total	(812,182)	(745,577)
Regulatory liabilities	47,248	55,022
Deferred tax Liability, Accrued Tax Expense, Compensation and Benefits Pensions	(20,867)	(18,793)
Sale and leaseback		0
Compensation	1,712	1,618
Accumulated deferred investment tax credit	1,829	1,958
Provision for allowances and contingencies	7,755	7,730
Net operating loss carryforwards	27,620	81
Other	729	863
Deferred Tax Assets, Net of Valuation Allowance	77,423	58,450
Accrued Income Taxes, Noncurrent	9,468	5,369
Deferred Tax Assets, Deferred Income	7,572	10,196
Deferred Tax Liabilities, Accumulated Storm Damage Provision	3,876	13,276
Deferred Tax Liabilities, Power Purchase Agreements	(22,014)	(1,202)
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	3,728	883
Deferred tax asset Nuclear Decommissioning Liabilities	97	94
Deferred Tax Liabilities, Net, Noncurrent	(744,227)	(692,496)
System Energy [Member]
Plant basis differences - net	(448,010)	(433,874)
Regulatory assets for income taxes - net	(68,742)	(61,205)
Nuclear decommissioning trusts	(92,527)	(153,610)
Pension, net funding	(17,889)	(18,033)
Deferred fuel	(128)	(49)
Other	(14,364)	(5,622)
Total	(641,660)	(672,393)
Regulatory liabilities	237,452	224,036
Deferred tax Liability, Accrued Tax Expense, Compensation and Benefits Pensions	(2,481)	(1,925)
Sale and leaseback		102,474
Compensation	308	447
Accumulated deferred investment tax credit	11,151	10,729
Provision for allowances and contingencies	0	0
Deferred Tax Assets, Power Purchase Arrangements		0
Net operating loss carryforwards	20,639	0
Other	0	2
Deferred Tax Assets, Net of Valuation Allowance	294,270	347,153
Accrued Income Taxes, Noncurrent	28,680	57,691
Deferred Tax Assets, Deferred Income	0	0
Deferred Tax Liabilities, Accumulated Storm Damage Provision	0	0
Deferred Tax Liabilities, Power Purchase Agreements	0
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	8,261	1,958
Deferred tax asset Nuclear Decommissioning Liabilities	18,940	9,432
Deferred Tax Liabilities, Net, Noncurrent	$ (376,070)	$ (382,931)