Retirement And Other Postretirement Benefits (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Pension Plan [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 23,617	$ 23,376
Defined Benefit Plan, Interest Cost	59,680	70,626
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(75,280)	(95,980)
Defined Benefit Plan, Amortization of Gain (Loss)	13,309	15,120
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	21,326	13,142
Pension Plan [Member] | Entergy Arkansas [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	4,427	4,099
Defined Benefit Plan, Interest Cost	13,814	13,217
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(17,676)	(18,155)
Defined Benefit Plan, Amortization of Gain (Loss)	4,791	5,746
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	5,356	4,907
Pension Plan [Member] | Entergy Louisiana [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	5,454	5,551
Defined Benefit Plan, Interest Cost	14,704	13,961
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(18,897)	(19,447)
Defined Benefit Plan, Amortization of Gain (Loss)	2,268	2,602
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	3,529	2,667
Pension Plan [Member] | Entergy Mississippi [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,304	1,284
Defined Benefit Plan, Interest Cost	3,699	3,521
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,949)	(5,113)
Defined Benefit Plan, Amortization of Gain (Loss)	822	1,140
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	876	832
Pension Plan [Member] | Entergy New Orleans [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	411	440
Defined Benefit Plan, Interest Cost	1,647	1,569
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(2,174)	(2,204)
Defined Benefit Plan, Amortization of Gain (Loss)	415	470
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	299	275
Pension Plan [Member] | Entergy Texas [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,024	961
Defined Benefit Plan, Interest Cost	2,973	2,831
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(3,889)	(4,077)
Defined Benefit Plan, Amortization of Gain (Loss)	454	393
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	562	108
Pension Plan [Member] | System Energy [Member] | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,372	1,384
Defined Benefit Plan, Interest Cost	3,585	3,391
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,575)	(4,648)
Defined Benefit Plan, Amortization of Gain (Loss)	1,114	1,165
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	1,496	1,292
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	2,757	3,126
Defined Benefit Plan, Interest Cost	9,690	9,852
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(10,209)	(10,569)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(5,720)	(5,720)
Defined Benefit Plan, Amortization of Gain (Loss)	(3,870)	(2,761)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(7,352)	(6,072)
Other Postretirement Benefits Plan [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	572	642
Defined Benefit Plan, Interest Cost	1,775	1,833
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,225)	(4,384)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	524	524
Defined Benefit Plan, Amortization of Gain (Loss)	(353)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(1,707)	(1,385)
Other Postretirement Benefits Plan [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	671	700
Defined Benefit Plan, Interest Cost	2,012	1,999
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1,136)	(1,136)
Defined Benefit Plan, Amortization of Gain (Loss)	(1,811)	(1,738)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(264)	(175)
Other Postretirement Benefits Plan [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	162	184
Defined Benefit Plan, Interest Cost	489	486
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1,328)	(1,372)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(239)	(239)
Defined Benefit Plan, Amortization of Gain (Loss)	(57)	15
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(973)	(926)
Other Postretirement Benefits Plan [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	52	51
Defined Benefit Plan, Interest Cost	249	253
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1,445)	(1,479)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(229)	(229)
Defined Benefit Plan, Amortization of Gain (Loss)	(27)	19
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(1,400)	(1,385)
Other Postretirement Benefits Plan [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	159	168
Defined Benefit Plan, Interest Cost	582	603
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(2,452)	(2,539)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1,093)	(1,093)
Defined Benefit Plan, Amortization of Gain (Loss)	153	148
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(2,651)	(2,713)
Other Postretirement Benefits Plan [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	174	175
Defined Benefit Plan, Interest Cost	394	398
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(702)	(728)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(73)	(73)
Defined Benefit Plan, Amortization of Gain (Loss)	(7)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	$ (214)	$ (228)