Income Taxes (Significant Components Of Accumulated Deferred Income Taxes And Taxes Accrued) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Liabilities, Property, Plant and Equipment	$ (6,192,156)	$ (5,270,010)
Deferred Tax Liabilities, Regulatory Assets and Liabilities	(989,405)	(937,554)
Deferred Tax Liabilities Nuclear Decommissioning Trusts	(467,267)	(318,570)
Deferred Tax Liability, Tax Deferred Expense, Compensation and Benefits, Pensions	(363,829)	(336,496)
Deferred Tax Liabilities, Combined Unitary State Taxes	(8,783)	(10,335)
Deferred Tax Liability, Deferred Fuel	(69,436)	(181,222)
Deferred Tax Liabilities, Other	(251,107)	(333,421)
Deferred Tax Liabilities, Net	(8,420,069)	(7,426,814)
Regulatory liabilities	1,247,530	1,108,075
Pension and other post-employment benefits	116,222	141,399
Compensation	81,226	76,317
Accumulated deferred investment tax credit	55,928	57,501
Provision for allowances and contingencies	149,479	97,545
Net operating loss carryforwards	2,857,908	2,065,149
Capital losses and miscellaneous tax credits	107,009	28,876
Valuation allowance	(372,119)	(372,017)
Other	(220,055)	(245,236)
Deferred Tax Assets, Net of Valuation Allowance	4,612,667	3,643,187
Non-current accrued taxes (including unrecognized tax benefits)	(422,213)	(951,110)
Deferred Tax Liabilities, Deferred Expense	(75,612)	(3,993)
Deferred Tax Liabilities, Accumulated Storm Damage Provision	2,474	35,213
Deferred tax asset Nuclear Decommissioning Liabilities	147,011	173,201
Accumulated deferred income taxes and taxes accrued	(4,229,615)	(4,734,737)
Deferred Tax Asset, Unbilled Revenue	(2,418)	(21,905)
Entergy Arkansas [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	(1,421,272)	(1,181,456)
Deferred Tax Liabilities, Regulatory Assets and Liabilities	(241,427)	(244,624)
Deferred Tax Liabilities Nuclear Decommissioning Trusts	(154,106)	(107,858)
Deferred Tax Liability, Tax Deferred Expense, Compensation and Benefits, Pensions	(96,853)	(93,139)
Deferred Tax Liabilities, Deferred Fuel	0	(35,205)
Deferred Tax Liabilities, Other	(21,187)	(76,813)
Deferred Tax Liabilities, Net	(1,918,852)	(1,747,391)
Regulatory liabilities	296,278	236,318
Deferred tax Liability, Accrued Tax Expense, Compensation and Benefits Pensions	(28,868)	(28,463)
Compensation	4,054	3,361
Accumulated deferred investment tax credit	6,761	7,171
Provision for allowances and contingencies	23,956	26,432
Net operating loss carryforwards	94,321	10,491
Other	(17,072)	(24,969)
Deferred Tax Assets, Net of Valuation Allowance	544,974	426,708
Non-current accrued taxes (including unrecognized tax benefits)	(63,175)	(177,551)
Deferred Tax Liabilities, Accumulated Storm Damage Provision	0	0
Deferred Tax Liabilities, Power Purchase Agreements	(15,993)	8,296
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	7,137	719
Deferred tax asset Nuclear Decommissioning Liabilities	118,301	139,499
Accumulated deferred income taxes and taxes accrued	(1,437,053)	(1,498,234)
Deferred Tax Asset, Unbilled Revenue	(5,962)	(6,211)
Entergy Louisiana [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	(2,639,079)	(2,513,138)
Deferred Tax Liabilities, Regulatory Assets and Liabilities	(500,395)	(457,102)
Deferred Tax Liabilities Nuclear Decommissioning Trusts	(173,402)	(118,172)
Deferred Tax Liability, Tax Deferred Expense, Compensation and Benefits, Pensions	(82,305)	(82,891)
Deferred Tax Liabilities, Deferred Fuel	(17,065)	(49,792)
Deferred Tax Liabilities, Other	(126,952)	(126,350)
Deferred Tax Liabilities, Net	(3,651,490)	(3,389,963)
Regulatory liabilities	575,459	508,594
Pension and other post-employment benefits	46,837	52,414
Compensation	6,078	5,207
Accumulated deferred investment tax credit	27,902	29,271
Provision for allowances and contingencies	70,297	15,741
Net operating loss carryforwards	459,553	307,175
Other	(52,438)	(41,310)
Deferred Tax Assets, Net of Valuation Allowance	1,240,317	972,964
Non-current accrued taxes (including unrecognized tax benefits)	(19,731)	(42,121)
Deferred Tax Liabilities, Deferred Expense	(20,375)	(2,405)
Deferred Tax Liabilities, Accumulated Storm Damage Provision	0	31,337
Deferred Tax Liabilities, Power Purchase Agreements	112,292	11,181
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	13,073	2,774
Deferred tax asset Nuclear Decommissioning Liabilities	9,055	12,883
Accumulated deferred income taxes and taxes accrued	(2,391,442)	(2,374,878)
Entergy Mississippi [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	(810,120)	(691,675)
Deferred Tax Liabilities, Regulatory Assets and Liabilities	(41,519)	(44,358)
Deferred Tax Liabilities Nuclear Decommissioning Trusts	0	0
Deferred Tax Liability, Tax Deferred Expense, Compensation and Benefits, Pensions	(24,342)	(22,256)
Deferred Tax Liabilities, Deferred Fuel	(21,137)	(37,333)
Deferred Tax Liabilities, Other	(6,844)	(26,752)
Deferred Tax Liabilities, Net	(902,822)	(822,374)
Regulatory liabilities	54,586	54,454
Deferred tax Liability, Accrued Tax Expense, Compensation and Benefits Pensions	(10,064)	(9,196)
Compensation	3,649	2,316
Accumulated deferred investment tax credit	3,446	3,641
Provision for allowances and contingencies	10,072	10,300
Net operating loss carryforwards	8,375	10,140
Other	(1,556)	(6,849)
Deferred Tax Assets, Net of Valuation Allowance	85,427	89,483
Non-current accrued taxes (including unrecognized tax benefits)	(4,349)	(47,139)
Deferred Tax Liabilities, Accumulated Storm Damage Provision	0	0
Deferred Tax Liabilities, Power Purchase Agreements	(1,140)	0
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	7,613	5,152
Deferred tax asset Nuclear Decommissioning Liabilities	0	1
Accumulated deferred income taxes and taxes accrued	(821,744)	(780,030)
Deferred Tax Asset, Unbilled Revenue	(6,194)	(5,826)
Entergy New Orleans [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	(272,187)	(115,841)
Deferred Tax Liabilities, Regulatory Assets and Liabilities	(23,618)	(24,738)
Deferred Tax Liabilities Nuclear Decommissioning Trusts	0	0
Deferred Tax Liability, Tax Deferred Expense, Compensation and Benefits, Pensions	(9,216)	(9,604)
Deferred Tax Liabilities, Deferred Fuel	(1,563)	(2,560)
Deferred Tax Liabilities, Other	(4,270)	(21,977)
Deferred Tax Liabilities, Net	(323,370)	(184,092)
Regulatory liabilities	42,921	27,438
Deferred tax Liability, Accrued Tax Expense, Compensation and Benefits Pensions	(19,354)	(18,114)
Compensation	1,268	1,107
Accumulated deferred investment tax credit	4,431	4,438
Provision for allowances and contingencies	25,846	26,671
Net operating loss carryforwards	26,227	12,146
Other	(235)	(11,105)
Deferred Tax Assets, Net of Valuation Allowance	97,833	79,887
Non-current accrued taxes (including unrecognized tax benefits)	(29,922)	(281,054)
Deferred Tax Liabilities, Accumulated Storm Damage Provision	0	0
Deferred Tax Liabilities, Power Purchase Agreements	12,516	9,372
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	15,684	11,006
Deferred tax asset Nuclear Decommissioning Liabilities	0	0
Accumulated deferred income taxes and taxes accrued	(195,615)	(385,259)
Deferred Tax Asset, Unbilled Revenue	(1,045)	(4,090)
Entergy Texas [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	(671,072)	(614,134)
Deferred Tax Liabilities, Regulatory Assets and Liabilities	(104,562)	(95,717)
Deferred Tax Liabilities Nuclear Decommissioning Trusts	0	0
Deferred Tax Liability, Tax Deferred Expense, Compensation and Benefits, Pensions	(17,522)	(18,111)
Deferred Tax Liabilities, Deferred Fuel	(29,194)	(54,204)
Deferred Tax Liabilities, Other	(3,301)	(4,126)
Deferred Tax Liabilities, Net	(831,589)	(812,182)
Regulatory liabilities	41,137	47,248
Deferred tax Liability, Accrued Tax Expense, Compensation and Benefits Pensions	(21,977)	(20,867)
Compensation	2,181	1,712
Accumulated deferred investment tax credit	1,672	1,829
Provision for allowances and contingencies	8,659	7,755
Net operating loss carryforwards	61	27,620
Other	(1,740)	(729)
Deferred Tax Assets, Net of Valuation Allowance	43,590	77,423
Non-current accrued taxes (including unrecognized tax benefits)	(26,906)	(9,468)
Deferred Tax Liabilities, Accumulated Storm Damage Provision	1,387	3,876
Deferred Tax Liabilities, Power Purchase Agreements	4,551	22,014
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	1,655	3,728
Deferred tax asset Nuclear Decommissioning Liabilities	97	97
Accumulated deferred income taxes and taxes accrued	(814,905)	(744,227)
Deferred Tax Asset, Unbilled Revenue	(8,365)	(7,572)
System Energy [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	(450,559)	(448,010)
Deferred Tax Liabilities, Regulatory Assets and Liabilities	(76,522)	(68,742)
Deferred Tax Liabilities Nuclear Decommissioning Trusts	(139,858)	(92,527)
Deferred Tax Liability, Tax Deferred Expense, Compensation and Benefits, Pensions	(18,895)	(17,889)
Deferred Tax Liabilities, Deferred Fuel	(37)	(128)
Deferred Tax Liabilities, Other	(9,051)	(14,364)
Deferred Tax Liabilities, Net	(694,922)	(641,660)
Regulatory liabilities	240,310	237,452
Deferred tax Liability, Accrued Tax Expense, Compensation and Benefits Pensions	(2,641)	(2,481)
Compensation	406	308
Accumulated deferred investment tax credit	11,717	11,151
Provision for allowances and contingencies	225	0
Net operating loss carryforwards	35,089	20,639
Other	0	0
Deferred Tax Assets, Net of Valuation Allowance	317,576	294,270
Non-current accrued taxes (including unrecognized tax benefits)	(28,398)	(28,680)
Deferred Tax Liabilities, Accumulated Storm Damage Provision	0	0
Deferred Tax Liabilities, Power Purchase Agreements	0	0
Deferred Tax Assets, Capital Losses and Miscellaneous Tax Credits	13,211	8,261
Deferred tax asset Nuclear Decommissioning Liabilities	19,259	18,940
Accumulated deferred income taxes and taxes accrued	(405,744)	(376,070)
Deferred Tax Asset, Unbilled Revenue	$ 0	$ 0