Retirement, Other Postretirement Benefits, And Defined Contribution Plans Schedule Of Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	$ 14,654	$ 24,734	$ 26,578
Defined Benefit Plan, Interest Cost	42,272	27,306	21,278
Expected return on assets	(36,732)	(43,420)	(43,220)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(22,558)	(25,550)	(33,069)
Recognized net loss	(11,446)	4,333	2,853
Net pension cost	(13,810)	(12,597)	(25,580)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	(4,434)	(858)	(3,168)
Net (gain)/loss	(44,441)	(131,524)	6,210
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	22,558	25,550	33,069
Amortization of net loss	(11,446)	4,333	2,853
Total	(14,871)	(111,165)	33,258
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(28,681)	(123,762)	7,678
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	77,900	140,000
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	29,700	56,800
Net pension cost	43,800	30,900	28,600
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	5,600,000	5,700,000
Service cost - benefits earned during the period	101,182	138,085	165,278
Defined Benefit Plan, Interest Cost	298,281	235,805	191,107
Expected return on assets	(388,030)	(402,504)	(424,572)
Recognized net loss	81,919	188,683	334,124
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	(160,387)	(230,389)	(205,878)
Net pension cost	253,739	390,458	471,815
Net (gain)/loss	(213,636)	6,113	(448,532)
Amortization of net loss	(81,919)	(188,683)	(334,124)
Total	(455,942)	(412,959)	(988,534)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(202,203)	(22,501)	(516,719)
Entergy Arkansas [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	2,965	4,457	4,135
Defined Benefit Plan, Interest Cost	8,002	5,050	3,726
Expected return on assets	(15,113)	(17,930)	(18,020)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	2,096	1,885	(1,121)
Recognized net loss	171	873	196
Net pension cost	(1,879)	(5,665)	(11,084)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	0	(273)	85
Net (gain)/loss	(23,033)	12,894	9,956
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	(2,096)	(1,885)	1,121
Amortization of net loss	171	873	196
Total	(25,300)	10,409	10,796
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(27,179)	4,744	(288)
Entergy Arkansas [Member] | Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	1,935	2,192
Net pension cost	637	282	343
Entergy Arkansas [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	1,048,901	1,008,152
Service cost - benefits earned during the period	18,461	25,210	28,632
Defined Benefit Plan, Interest Cost	56,026	45,378	35,683
Expected return on assets	(70,574)	(75,820)	(78,368)
Recognized net loss	19,400	43,597	69,290
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	(26,137)	(36,409)	(37,682)
Net pension cost	49,450	74,774	92,919
Net (gain)/loss	(30,674)	28,365	(96,066)
Amortization of net loss	(19,400)	(43,597)	(69,290)
Total	(76,211)	(51,641)	(203,038)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(26,761)	23,133	(110,119)
Entergy Louisiana [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	3,379	5,633	6,174
Defined Benefit Plan, Interest Cost	8,931	5,770	4,520
Expected return on assets	0	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(3,804)	(4,630)	(4,920)
Recognized net loss	(7,057)	(744)	(364)
Net pension cost	1,449	6,029	5,410
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	4,434	(323)	(357)
Net (gain)/loss	(458)	(65,501)	(2,367)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	3,804	4,630	4,920
Amortization of net loss	(7,057)	(744)	(364)
Total	5,969	(59,804)	3,274
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	7,418	(53,775)	8,684
Entergy Louisiana [Member] | Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	2,494	1,197
Net pension cost	99	102	307
Entergy Louisiana [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	1,085,318	1,146,561
Service cost - benefits earned during the period	24,716	33,520	38,271
Defined Benefit Plan, Interest Cost	60,346	49,330	39,740
Expected return on assets	(75,757)	(82,478)	(89,821)
Recognized net loss	19,797	41,711	67,015
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	(40,437)	(58,550)	(61,945)
Net pension cost	69,539	100,633	117,150
Net (gain)/loss	(71,016)	(15,604)	(89,534)
Amortization of net loss	(19,797)	(41,711)	(67,015)
Total	(131,250)	(115,865)	(218,494)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(61,711)	(15,232)	(101,344)
Entergy Mississippi [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	878	1,354	1,448
Defined Benefit Plan, Interest Cost	2,170	1,401	1,110
Expected return on assets	(4,716)	(5,575)	(5,536)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(955)	(1,772)	(1,775)
Recognized net loss	85	222	76
Net pension cost	(2,538)	(4,370)	(4,677)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	0	1,300	0
Net (gain)/loss	(6,883)	6,629	(2,823)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	955	1,772	1,775
Amortization of net loss	85	222	76
Total	(6,013)	6,879	(1,124)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(8,551)	2,509	(5,801)
Entergy Mississippi [Member] | Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	3,187	3,594
Net pension cost	808	321	365
Entergy Mississippi [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	273,338	292,596
Service cost - benefits earned during the period	5,775	8,043	9,070
Defined Benefit Plan, Interest Cost	15,402	12,979	10,446
Expected return on assets	(19,423)	(20,168)	(22,407)
Recognized net loss	5,719	12,594	20,007
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	(12,242)	(15,786)	(16,710)
Net pension cost	19,715	29,234	33,826
Net (gain)/loss	(20,220)	(4,743)	(29,675)
Amortization of net loss	(5,719)	(12,594)	(20,007)
Total	(38,181)	(33,123)	(66,392)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(18,466)	(3,889)	(32,566)
Entergy New Orleans [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	235	397	437
Defined Benefit Plan, Interest Cost	1,160	694	521
Expected return on assets	(5,263)	(5,997)	(5,750)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(916)	(916)	(916)
Recognized net loss	466	(898)	(712)
Net pension cost	(4,318)	(6,720)	(6,420)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	0	0	0
Net (gain)/loss	(7,606)	17,334	(3,330)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	916	916	916
Amortization of net loss	466	(898)	(712)
Total	(7,156)	19,148	(1,702)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(11,474)	12,428	(8,122)
Entergy New Orleans [Member] | Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	814	719
Net pension cost	132	114	30
Entergy New Orleans [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	125,878	128,499
Service cost - benefits earned during the period	1,955	2,745	3,038
Defined Benefit Plan, Interest Cost	6,747	5,491	4,392
Expected return on assets	(8,798)	(9,920)	(10,598)
Recognized net loss	1,694	4,787	7,596
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	(2,080)	(6,676)	(5,431)
Net pension cost	3,678	9,779	9,859
Net (gain)/loss	(3,183)	525	(16,159)
Amortization of net loss	(1,694)	(4,787)	(7,596)
Total	(6,957)	(10,938)	(29,186)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(3,279)	(1,159)	(19,327)
Entergy Texas [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	809	1,322	1,384
Defined Benefit Plan, Interest Cost	2,597	1,596	1,269
Expected return on assets	(8,776)	(10,273)	(10,192)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(4,371)	(4,371)	(3,742)
Recognized net loss	914	648	398
Net pension cost	(8,827)	(11,078)	(10,883)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	0	0	3,776
Net (gain)/loss	(8,790)	22,323	939
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	4,371	4,371	3,742
Amortization of net loss	914	648	398
Total	(5,333)	26,046	507
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(14,160)	14,968	(10,376)
Entergy Texas [Member] | Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	3,701	3,776
Net pension cost	253	1,320	615
Entergy Texas [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	225,379	245,428
Service cost - benefits earned during the period	4,328	5,999	6,921
Defined Benefit Plan, Interest Cost	12,726	10,729	8,381
Expected return on assets	(16,641)	(18,317)	(21,158)
Recognized net loss	4,075	9,013	12,676
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	(11,230)	(22,411)	(11,797)
Net pension cost	15,718	29,835	18,617
Net (gain)/loss	(16,759)	13,363	(18,217)
Amortization of net loss	(4,075)	(9,013)	(12,676)
Total	(32,064)	(18,061)	(42,690)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(16,346)	11,774	(24,073)
System Energy [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	754	1,239	1,340
Defined Benefit Plan, Interest Cost	1,726	1,116	878
Expected return on assets	(2,535)	(3,162)	(3,156)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(293)	(319)	(436)
Recognized net loss	0	121	61
Net pension cost	(348)	(1,005)	(1,313)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax	0	(141)	(69)
Net (gain)/loss	(3,942)	1,208	210
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	293	319	436
Amortization of net loss	0	121	61
Total	(3,649)	1,547	654
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(3,997)	542	(659)
System Energy [Member] | Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	267,432	269,583
Service cost - benefits earned during the period	5,749	7,746	8,851
Defined Benefit Plan, Interest Cost	13,852	11,286	9,087
Expected return on assets	(17,585)	(18,173)	(19,254)
Recognized net loss	4,236	10,938	18,404
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	(6,375)	(9,905)	(12,260)
Net pension cost	12,627	21,702	29,348
Net (gain)/loss	(3,268)	(7,063)	(27,617)
Amortization of net loss	(4,236)	(10,938)	(18,404)
Total	(13,879)	(27,906)	(58,281)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	$ (1,252)	$ (6,204)	$ (28,933)