Retirement And Other Postretirement Benefits (Schedule of Net Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 3,126	$ 3,664
Defined Benefit Plan, Interest Cost	9,852	10,568
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(10,569)	(9,183)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(5,720)	(5,640)
Defined Benefit Plan, Amortization of Gain (Loss)	(2,761)	(2,862)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(6,072)	(3,453)
Other Postretirement Benefits Plan [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	642	741
Defined Benefit Plan, Interest Cost	1,833	2,001
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,384)	(3,778)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	524	524
Defined Benefit Plan, Amortization of Gain (Loss)	0	43
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(1,385)	(469)
Other Postretirement Benefits Plan [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	700	845
Defined Benefit Plan, Interest Cost	1,999	2,233
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1,136)	(951)
Defined Benefit Plan, Amortization of Gain (Loss)	(1,738)	(1,764)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(175)	363
Other Postretirement Benefits Plan [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	184	220
Defined Benefit Plan, Interest Cost	486	543
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1,372)	(1,179)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(239)	(239)
Defined Benefit Plan, Amortization of Gain (Loss)	15	21
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(926)	(634)
Other Postretirement Benefits Plan [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	51	59
Defined Benefit Plan, Interest Cost	253	290
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(1,479)	(1,316)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(229)	(229)
Defined Benefit Plan, Amortization of Gain (Loss)	19	117
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(1,385)	(1,079)
Other Postretirement Benefits Plan [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	168	202
Defined Benefit Plan, Interest Cost	603	649
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(2,539)	(2,194)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(1,093)	(1,093)
Defined Benefit Plan, Amortization of Gain (Loss)	148	229
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(2,713)	(2,207)
Other Postretirement Benefits Plan [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	175	189
Defined Benefit Plan, Interest Cost	398	432
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(728)	(634)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(73)	(73)
Defined Benefit Plan, Amortization of Gain (Loss)	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(228)	(86)
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	2,700	9,200
Non Qualified Pension Plans [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	68	450
Non Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	51	27
Non Qualified Pension Plans [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	83	552
Non Qualified Pension Plans [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	31	33
Non Qualified Pension Plans [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	62	63
Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	23,376	25,678
Defined Benefit Plan, Interest Cost	70,626	75,701
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(95,980)	(98,133)
Defined Benefit Plan, Amortization of Gain (Loss)	15,120	22,347
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	13,142	164,020
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	0	138,427
Qualified Pension Plans [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	4,099	4,749
Defined Benefit Plan, Interest Cost	13,217	14,280
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(18,155)	(18,076)
Defined Benefit Plan, Amortization of Gain (Loss)	5,746	6,969
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	4,907	30,096
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		22,174
Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	5,551	6,280
Defined Benefit Plan, Interest Cost	13,961	15,379
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(19,447)	(19,233)
Defined Benefit Plan, Amortization of Gain (Loss)	2,602	4,964
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	2,667	43,389
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		35,999
Qualified Pension Plans [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,284	1,482
Defined Benefit Plan, Interest Cost	3,521	3,930
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(5,113)	(4,884)
Defined Benefit Plan, Amortization of Gain (Loss)	1,140	1,765
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	832	13,948
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		11,655
Qualified Pension Plans [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	440	491
Defined Benefit Plan, Interest Cost	1,569	1,715
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(2,204)	(2,267)
Defined Benefit Plan, Amortization of Gain (Loss)	470	513
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	275	2,145
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		1,693
Qualified Pension Plans [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	961	1,107
Defined Benefit Plan, Interest Cost	2,831	3,242
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,077)	(4,152)
Defined Benefit Plan, Amortization of Gain (Loss)	393	990
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	108	10,865
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		9,678
Qualified Pension Plans [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,384	1,467
Defined Benefit Plan, Interest Cost	3,391	3,528
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(4,648)	(4,538)
Defined Benefit Plan, Amortization of Gain (Loss)	1,165	1,461
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	$ 1,292	6,717
Defined Benefit Plan, Benefit Obligation, Payment for Settlement		$ 4,799