Retirement And Other Postretirement Benefits (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Pension Plan [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 23,617	$ 23,370	$ 47,234	$ 46,746
Defined Benefit Plan, Interest Cost	59,680	65,961	119,360	136,587
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(75,280)	(89,506)	(150,560)	(185,486)
Defined Benefit Plan, Amortization of Gain (Loss)	13,309	14,854	26,618	29,974
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	(325,253)	0	(325,253)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	21,326	339,932	42,652	353,074
Pension Plan [Member] | Entergy Arkansas [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	4,427	4,100	8,854	8,199
Defined Benefit Plan, Interest Cost	13,814	13,217	27,628	26,434
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(17,676)	(18,155)	(35,352)	(36,310)
Defined Benefit Plan, Amortization of Gain (Loss)	4,791	5,746	9,582	11,492
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	5,356	4,908	10,712	9,815
Pension Plan [Member] | Entergy Arkansas [Member] | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	47	68
Pension Plan [Member] | Entergy Louisiana [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	5,454	5,551	10,908	11,102
Defined Benefit Plan, Interest Cost	14,704	13,961	29,408	27,922
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(18,897)	(19,447)	(37,794)	(38,894)
Defined Benefit Plan, Amortization of Gain (Loss)	2,268	2,602	4,536	5,204
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	3,529	2,667	7,058	5,334
Pension Plan [Member] | Entergy Louisiana [Member] | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	36	51
Pension Plan [Member] | Entergy Mississippi [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,304	1,284	2,608	2,568
Defined Benefit Plan, Interest Cost	3,699	3,521	7,398	7,042
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,949)	(5,113)	(9,898)	(10,226)
Defined Benefit Plan, Amortization of Gain (Loss)	822	1,140	1,644	2,280
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	876	832	1,752	1,664
Pension Plan [Member] | Entergy Mississippi [Member] | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	90	83
Pension Plan [Member] | Entergy New Orleans [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	411	440	822	880
Defined Benefit Plan, Interest Cost	1,647	1,569	3,294	3,138
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(2,174)	(2,203)	(4,348)	(4,407)
Defined Benefit Plan, Amortization of Gain (Loss)	415	470	830	940
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	299	276	598	551
Pension Plan [Member] | Entergy New Orleans [Member] | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	35	31
Pension Plan [Member] | Entergy Texas [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,024	962	2,048	1,923
Defined Benefit Plan, Interest Cost	2,973	2,831	5,946	5,662
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(3,889)	(4,077)	(7,778)	(8,154)
Defined Benefit Plan, Amortization of Gain (Loss)	454	393	908	786
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		0		0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	562	109	1,124	217
Pension Plan [Member] | Entergy Texas [Member] | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	39	62
Pension Plan [Member] | System Energy [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,372	1,383	2,744	2,767
Defined Benefit Plan, Interest Cost	3,585	3,386	7,170	6,777
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,575)	(4,633)	(9,150)	(9,281)
Defined Benefit Plan, Amortization of Gain (Loss)	1,114	1,162	2,228	2,327
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement		(611)		(611)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	1,496	1,909	2,992	3,201
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	2,757	3,126	5,514	6,252
Defined Benefit Plan, Interest Cost	9,690	9,852	19,380	19,704
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(10,209)	(10,569)	(20,418)	(21,138)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(5,720)	(5,720)	(11,440)	(11,440)
Defined Benefit Plan, Amortization of Gain (Loss)	(3,870)	(2,761)	(7,740)	(5,522)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(7,352)	(6,072)	(14,704)	(12,144)
Other Postretirement Benefits Plan [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	572	642	1,144	1,284
Defined Benefit Plan, Interest Cost	1,775	1,833	3,550	3,666
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,225)	(4,384)	(8,450)	(8,768)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	524	524	1,048	1,048
Defined Benefit Plan, Amortization of Gain (Loss)	(353)	0	(706)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(1,707)	(1,385)	(3,414)	(2,770)
Other Postretirement Benefits Plan [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	671	700	1,342	1,400
Defined Benefit Plan, Interest Cost	2,012	1,999	4,024	3,998
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)	(2,272)	(2,272)
Defined Benefit Plan, Amortization of Gain (Loss)	(1,811)	(1,738)	(3,622)	(3,476)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(264)	(175)	(528)	(350)
Other Postretirement Benefits Plan [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	162	184	324	368
Defined Benefit Plan, Interest Cost	489	486	978	972
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1,328)	(1,372)	(2,656)	(2,744)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(239)	(239)	(478)	(478)
Defined Benefit Plan, Amortization of Gain (Loss)	(57)	15	(114)	30
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(973)	(926)	(1,946)	(1,852)
Other Postretirement Benefits Plan [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	52	51	104	102
Defined Benefit Plan, Interest Cost	249	253	498	506
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1,445)	(1,479)	(2,890)	(2,958)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(229)	(229)	(458)	(458)
Defined Benefit Plan, Amortization of Gain (Loss)	(27)	19	(54)	38
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(1,400)	(1,385)	(2,800)	(2,770)
Other Postretirement Benefits Plan [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	159	168	318	336
Defined Benefit Plan, Interest Cost	582	603	1,164	1,206
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(2,452)	(2,539)	(4,904)	(5,078)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1,093)	(1,093)	(2,186)	(2,186)
Defined Benefit Plan, Amortization of Gain (Loss)	153	148	306	296
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(2,651)	(2,713)	(5,302)	(5,426)
Other Postretirement Benefits Plan [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	174	175	348	350
Defined Benefit Plan, Interest Cost	394	398	788	796
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(702)	(728)	(1,404)	(1,456)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(73)	(73)	(146)	(146)
Defined Benefit Plan, Amortization of Gain (Loss)	(7)	0	(14)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	$ (214)	$ (228)	$ (428)	$ (456)