Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deferred Tax Liabilities, Property, Plant and Equipment	$ 7,183,430	$ 6,451,189
Deferred Tax Liabilities, Regulatory Assets	1,030,792	1,003,045
Deferred Tax Liabilities, Other	161,274	206,648
Deferred Tax Liabilities, Net	9,311,012	8,643,831
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	27,723	22,646
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	87,837	79,580
Deferred Tax Assets, Tax Credit Carryforwards	49,248	52,709
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	191,295	141,769
Deferred Tax Assets, Deferred Income	(3,586)	(9,960)
Deferred Tax Assets, Operating Loss Carryforwards	2,761,672	2,672,993
Deferred Tax Assets, Capital Loss Carryforwards	145,625	111,325
Deferred Tax Assets, Valuation Allowance	335,105	338,508
Deferred Tax Assets, Other	167,209	212,563
Deferred Tax Assets, Net of Valuation Allowance	4,587,238	4,504,739
Accumulated deferred income taxes and taxes accrued	5,577,141	4,448,761
Deferred Tax Assets, Regulatory Assets and Liabilities	1,325,440	1,394,937
Non-current accrued taxes (including unrecognized tax benefits)	(853,367)	(309,669)
Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	601,444	563,423
Pension, net regulatory asset
Deferred Tax Liabilities, Other	323,779	303,007
Combined unitary state taxes
Deferred Tax Liabilities, Other	2,911	3,600
Power Purchase Agreements
Deferred Tax Liabilities, Other	(13,270)	89,614
Deferred fuel
Deferred Tax Liabilities, Other	20,652	23,305
Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	169,880	164,685
Entergy Arkansas [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	1,752,176	1,530,196
Deferred Tax Liabilities, Regulatory Assets	237,989	219,773
Deferred Tax Liabilities, Other	20,874	24,430
Deferred Tax Liabilities, Net	2,330,775	2,050,018
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	(31,745)	(29,923)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	4,418	4,851
Deferred Tax Assets, Tax Credit Carryforwards	6,067	6,360
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	49,359	31,686
Deferred Tax Assets, Deferred Income	5,490	3,546
Deferred Tax Assets, Operating Loss Carryforwards	169,743	126,255
Deferred Tax Assets, Capital Loss Carryforwards	45,982	14,489
Deferred Tax Assets, Valuation Allowance	(1,727)
Deferred Tax Assets, Other	10,373	11,608
Deferred Tax Assets, Net of Valuation Allowance	744,539	607,426
Accumulated deferred income taxes and taxes accrued	1,846,713	1,489,169
Deferred Tax Assets, Regulatory Assets and Liabilities	348,063	310,621
Non-current accrued taxes (including unrecognized tax benefits)	(260,477)	(46,577)
Entergy Arkansas [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	223,747	185,725
Entergy Arkansas [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	102,847	101,887
Entergy Arkansas [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	(13,633)	(11,993)
Entergy Arkansas [Member] | Deferred fuel
Deferred Tax Liabilities, Other	6,775	0
Entergy Arkansas [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	138,516	127,933
Entergy Louisiana [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	2,993,462	2,729,299
Deferred Tax Liabilities, Regulatory Assets	469,902	497,177
Deferred Tax Liabilities, Other	88,305	106,590
Deferred Tax Liabilities, Net	3,928,505	3,722,793
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	41,555	39,379
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	5,764	7,119
Deferred Tax Assets, Tax Credit Carryforwards	23,882	26,549
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	70,167	59,448
Deferred Tax Assets, Deferred Income	(18,816)	(24,017)
Deferred Tax Assets, Operating Loss Carryforwards	360,028	336,128
Deferred Tax Assets, Capital Loss Carryforwards	18,554	17,029
Deferred Tax Assets, Valuation Allowance	(5)
Deferred Tax Assets, Other	40,459	54,207
Deferred Tax Assets, Net of Valuation Allowance	1,151,866	1,212,577
Accumulated deferred income taxes and taxes accrued	3,093,218	2,477,954
Deferred Tax Assets, Regulatory Assets and Liabilities	595,662	678,086
Non-current accrued taxes (including unrecognized tax benefits)	(316,579)	32,262
Entergy Louisiana [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	202,364	202,364
Entergy Louisiana [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	87,917	84,732
Entergy Louisiana [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	76,837	97,846
Entergy Louisiana [Member] | Deferred fuel
Deferred Tax Liabilities, Other	9,718	4,785
Entergy Louisiana [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	14,616	18,649
Entergy Mississippi [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	927,853	849,623
Deferred Tax Liabilities, Regulatory Assets	39,316	37,374
Deferred Tax Liabilities, Other	4,763	5,231
Deferred Tax Liabilities, Net	1,000,394	934,386
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	(7,377)	(8,989)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	3,196	3,277
Deferred Tax Assets, Tax Credit Carryforwards	3,291	3,355
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	32,112	11,361
Deferred Tax Assets, Deferred Income	897	1,274
Deferred Tax Assets, Operating Loss Carryforwards	0	305
Deferred Tax Assets, Capital Loss Carryforwards	8,795	8,206
Deferred Tax Assets, Valuation Allowance	0
Deferred Tax Assets, Other	(1,193)	1,096
Deferred Tax Assets, Net of Valuation Allowance	90,767	72,931
Accumulated deferred income taxes and taxes accrued	926,734	870,116
Deferred Tax Assets, Regulatory Assets and Liabilities	51,201	53,046
Non-current accrued taxes (including unrecognized tax benefits)	(17,107)	(8,661)
Entergy Mississippi [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	0	0
Entergy Mississippi [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	26,416	26,064
Entergy Mississippi [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	(1,140)	(1,140)
Entergy Mississippi [Member] | Deferred fuel
Deferred Tax Liabilities, Other	3,186	17,234
Entergy Mississippi [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	(155)	0
Entergy New Orleans [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	243,442	272,182
Deferred Tax Liabilities, Regulatory Assets	53,375	72,389
Deferred Tax Liabilities, Other	2,208	5,133
Deferred Tax Liabilities, Net	318,977	373,023
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	(15,975)	(19,443)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	1,077	1,394
Deferred Tax Assets, Tax Credit Carryforwards	3,909	4,205
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	36,608	23,998
Deferred Tax Assets, Deferred Income	(129)	715
Deferred Tax Assets, Operating Loss Carryforwards	6,803	30,740
Deferred Tax Assets, Capital Loss Carryforwards	16,693	16,220
Deferred Tax Assets, Valuation Allowance	0
Deferred Tax Assets, Other	612	1,692
Deferred Tax Assets, Net of Valuation Allowance	119,381	148,499
Accumulated deferred income taxes and taxes accrued	201,345	201,541
Deferred Tax Assets, Regulatory Assets and Liabilities	70,190	89,385
Non-current accrued taxes (including unrecognized tax benefits)	(1,749)	22,983
Entergy New Orleans [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	0	0
Entergy New Orleans [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	8,725	9,687
Entergy New Orleans [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	11,226	12,385
Entergy New Orleans [Member] | Deferred fuel
Deferred Tax Liabilities, Other	1	1,247
Entergy New Orleans [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	(407)	(407)
Entergy Texas [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	788,106	727,242
Deferred Tax Liabilities, Regulatory Assets	111,154	100,959
Deferred Tax Liabilities, Other	6,158	4,512
Deferred Tax Liabilities, Net	926,581	854,430
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	(24,479)	(23,403)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	2,531	2,596
Deferred Tax Assets, Tax Credit Carryforwards	1,358	1,515
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	16,701	4,358
Deferred Tax Assets, Deferred Income	8,561	7,925
Deferred Tax Assets, Operating Loss Carryforwards	54	50
Deferred Tax Assets, Capital Loss Carryforwards	1,125	1,273
Deferred Tax Assets, Valuation Allowance	0
Deferred Tax Assets, Other	404	1,189
Deferred Tax Assets, Net of Valuation Allowance	41,532	32,925
Accumulated deferred income taxes and taxes accrued	947,067	868,849
Deferred Tax Assets, Regulatory Assets and Liabilities	35,726	37,325
Non-current accrued taxes (including unrecognized tax benefits)	(62,018)	(47,344)
Entergy Texas [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	0	0
Entergy Texas [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	15,642	16,569
Entergy Texas [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	4,578	5,148
Entergy Texas [Member] | Deferred fuel
Deferred Tax Liabilities, Other	943	0
Entergy Texas [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	(449)	97
System Energy [Member]
Deferred Tax Liabilities, Property, Plant and Equipment	473,895	466,361
Deferred Tax Liabilities, Regulatory Assets	119,157	75,606
Deferred Tax Liabilities, Other	10,214	13,572
Deferred Tax Liabilities, Net	778,624	730,958
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions	(27,660)	(24,642)
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	139	515
Deferred Tax Assets, Tax Credit Carryforwards	10,740	10,724
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Contingencies	225	225
Deferred Tax Assets, Deferred Income	0	0
Deferred Tax Assets, Operating Loss Carryforwards	84,302	69,611
Deferred Tax Assets, Capital Loss Carryforwards	11,245	10,788
Deferred Tax Assets, Valuation Allowance	0
Deferred Tax Assets, Other	36	0
Deferred Tax Assets, Net of Valuation Allowance	322,907	314,242
Accumulated deferred income taxes and taxes accrued	625,165	451,830
Deferred Tax Assets, Regulatory Assets and Liabilities	226,660	229,065
Non-current accrued taxes (including unrecognized tax benefits)	(169,448)	(35,114)
System Energy [Member] | Nuclear decommissioning trusts/receivables
Deferred Tax Liabilities, Other	175,341	175,341
System Energy [Member] | Pension, net regulatory asset
Deferred Tax Liabilities, Other	0	0
System Energy [Member] | Power Purchase Agreements
Deferred Tax Liabilities, Other	0	0
System Energy [Member] | Deferred fuel
Deferred Tax Liabilities, Other	17	78
System Energy [Member] | Nuclear and other decommissioning liabilities
Deferred Tax Assets, Other	$ 17,220	$ 17,956