Retirement And Other Postretirement Benefits (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Pension Plan [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 23,454	$ 23,358	$ 70,688	$ 70,104
Defined Benefit Plan, Interest Cost	58,145	56,631	177,505	193,218
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(75,383)	(76,557)	(225,943)	(262,043)
Defined Benefit Plan, Amortization of Gain (Loss)	13,086	14,322	39,704	44,296
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	23,874	0	23,874	325,253
Defined Benefit Plan, Other Cost (Credit)	(5,780)	0	(5,780)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	37,396	17,754	80,048	370,828
Pension Plan [Member] | Entergy Arkansas [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	4,385	4,101	13,239	12,300
Defined Benefit Plan, Interest Cost	13,580	13,218	41,208	39,652
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(17,791)	(18,156)	(53,143)	(54,466)
Defined Benefit Plan, Amortization of Gain (Loss)	4,171	5,745	13,753	17,237
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	1,454		1,454	0
Defined Benefit Plan, Other Cost (Credit)	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	5,799	4,908	16,511	14,723
Pension Plan [Member] | Entergy Louisiana [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	5,403	5,550	16,311	16,652
Defined Benefit Plan, Interest Cost	14,347	13,962	43,755	41,884
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(18,981)	(19,446)	(56,775)	(58,340)
Defined Benefit Plan, Amortization of Gain (Loss)	2,367	2,601	6,903	7,805
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	5,982		5,982	0
Defined Benefit Plan, Other Cost (Credit)	(2,472)		(2,472)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	6,646	2,667	13,704	8,001
Pension Plan [Member] | Entergy Mississippi [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,296	1,284	3,904	3,852
Defined Benefit Plan, Interest Cost	3,661	3,522	11,059	10,564
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(5,039)	(5,112)	(14,937)	(15,338)
Defined Benefit Plan, Amortization of Gain (Loss)	750	1,140	2,394	3,420
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	146		146	0
Defined Benefit Plan, Other Cost (Credit)	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	814	834	2,566	2,498
Pension Plan [Member] | Entergy New Orleans [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	410	441	1,232	1,321
Defined Benefit Plan, Interest Cost	1,613	1,569	4,907	4,707
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1,946)	(2,202)	(6,294)	(6,609)
Defined Benefit Plan, Amortization of Gain (Loss)	703	471	1,533	1,411
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	6,195		6,195	0
Defined Benefit Plan, Other Cost (Credit)	(1,934)		(1,934)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	5,041	279	5,639	830
Pension Plan [Member] | Entergy Texas [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,008	963	3,056	2,886
Defined Benefit Plan, Interest Cost	2,917	2,832	8,863	8,494
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(3,890)	(4,077)	(11,668)	(12,231)
Defined Benefit Plan, Amortization of Gain (Loss)	454	393	1,362	1,179
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	617		617	0
Defined Benefit Plan, Other Cost (Credit)	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	1,106	111	2,230	328
Pension Plan [Member] | System Energy [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,352	1,380	4,096	4,147
Defined Benefit Plan, Interest Cost	3,497	3,375	10,667	10,152
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,605)	(4,602)	(13,755)	(13,883)
Defined Benefit Plan, Amortization of Gain (Loss)	954	1,155	3,182	3,482
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	512		512	611
Defined Benefit Plan, Other Cost (Credit)	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	1,710	1,308	4,702	4,509
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	2,702	3,126	8,216	9,378
Defined Benefit Plan, Interest Cost	9,447	9,852	28,827	29,556
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(9,830)	(10,569)	(30,248)	(31,707)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(5,661)	(5,720)	(17,101)	(17,160)
Defined Benefit Plan, Amortization of Gain (Loss)	(3,679)	(2,761)	(11,419)	(8,283)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	(2,957)	0	(2,957)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	(2,202)	0	(2,202)	0
Defined Benefit Plan, Other Cost (Credit)	13,725	0	13,725	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	1,545	(6,072)	(13,159)	(18,216)
Other Postretirement Benefits Plan [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	571	642	1,715	1,926
Defined Benefit Plan, Interest Cost	1,775	1,833	5,325	5,499
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,225)	(4,384)	(12,675)	(13,152)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	524	524	1,572	1,572
Defined Benefit Plan, Amortization of Gain (Loss)	(353)	0	(1,059)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0		0
Defined Benefit Plan, Other Cost (Credit)	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(1,708)	(1,385)	(5,122)	(4,155)
Other Postretirement Benefits Plan [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	632	700	1,974	2,100
Defined Benefit Plan, Interest Cost	1,932	1,999	5,956	5,997
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0	0	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1,136)	(1,136)	(3,408)	(3,408)
Defined Benefit Plan, Amortization of Gain (Loss)	(1,500)	(1,738)	(5,122)	(5,214)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	(1,014)		(1,014)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	(1,094)		(1,094)
Defined Benefit Plan, Other Cost (Credit)	(2,541)		(2,541)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(4,721)	(175)	(5,249)	(525)
Other Postretirement Benefits Plan [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	162	184	486	552
Defined Benefit Plan, Interest Cost	489	486	1,467	1,458
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1,327)	(1,372)	(3,983)	(4,116)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(239)	(239)	(717)	(717)
Defined Benefit Plan, Amortization of Gain (Loss)	(58)	15	(172)	45
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0		0
Defined Benefit Plan, Other Cost (Credit)	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(973)	(926)	(2,919)	(2,778)
Other Postretirement Benefits Plan [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	32	51	136	153
Defined Benefit Plan, Interest Cost	203	253	701	759
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1,065)	(1,479)	(3,955)	(4,437)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(170)	(229)	(628)	(687)
Defined Benefit Plan, Amortization of Gain (Loss)	(83)	19	(137)	57
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	(1,345)		(1,345)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	(268)		(268)
Defined Benefit Plan, Other Cost (Credit)	18,793		18,793
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	16,097	(1,385)	13,297	(4,155)
Other Postretirement Benefits Plan [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	158	168	476	504
Defined Benefit Plan, Interest Cost	581	603	1,745	1,809
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(2,451)	(2,539)	(7,355)	(7,617)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1,093)	(1,093)	(3,279)	(3,279)
Defined Benefit Plan, Amortization of Gain (Loss)	154	148	460	444
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0		0
Defined Benefit Plan, Other Cost (Credit)	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(2,651)	(2,713)	(7,953)	(8,139)
Other Postretirement Benefits Plan [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	175	175	523	525
Defined Benefit Plan, Interest Cost	394	398	1,182	1,194
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(703)	(728)	(2,107)	(2,184)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(73)	(73)	(219)	(219)
Defined Benefit Plan, Amortization of Gain (Loss)	(7)	0	(21)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0		0
Defined Benefit Plan, Other Cost (Credit)	0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	$ (214)	$ (228)	$ (642)	$ (684)