Retirement And Other Postretirement Benefits (Components Of Qualified Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	$ 25,302	$ 33,845	$ 76,346	$ 108,482
Interest cost on projected benefit obligation	73,850	60,734	223,584	164,529
Expected return on assets	(96,775)	(100,203)	(290,660)	(306,895)
Amortization of loss	20,204	42,367	63,858	159,359
Net other postretirement benefit cost	29,495	162,291	225,716	273,676
Pension Plans Defined Benefit [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	4,566	6,138	13,976	19,695
Interest cost on projected benefit obligation	13,813	11,866	42,010	30,944
Expected return on assets	(17,639)	(18,731)	(53,593)	(57,009)
Amortization of loss	5,438	10,283	18,170	36,557
Net other postretirement benefit cost	6,736	21,033	45,079	53,160
Pension Plans Defined Benefit [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	6,175	8,261	18,654	26,405
Interest cost on projected benefit obligation	14,896	12,523	45,219	33,706
Expected return on assets	(18,892)	(20,586)	(56,891)	(62,779)
Amortization of loss	4,748	10,156	14,704	35,055
Net other postretirement benefit cost	7,488	43,861	60,477	70,355
Pension Plans Defined Benefit [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,431	1,953	4,369	6,158
Interest cost on projected benefit obligation	3,797	3,383	11,551	8,857
Expected return on assets	(4,830)	(5,006)	(14,349)	(15,373)
Amortization of loss	1,545	2,941	4,937	10,371
Net other postretirement benefit cost	2,288	10,124	18,596	19,074
Pension Plans Defined Benefit [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	492	690	1,470	2,194
Interest cost on projected benefit obligation	1,667	1,368	5,051	3,646
Expected return on assets	(2,206)	(2,487)	(6,783)	(7,517)
Amortization of loss	456	1,208	1,453	3,944
Net other postretirement benefit cost	657	5,181	3,139	6,669
Pension Plans Defined Benefit [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,074	1,441	3,271	4,652
Interest cost on projected benefit obligation	3,138	2,795	9,542	7,242
Expected return on assets	(4,147)	(4,551)	(12,322)	(14,393)
Amortization of loss	1,008	2,130	3,057	7,124
Net other postretirement benefit cost	1,705	14,897	14,450	20,172
Pension Plans Defined Benefit [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,430	1,891	4,342	5,937
Interest cost on projected benefit obligation	3,419	2,882	10,382	7,614
Expected return on assets	(4,392)	(4,509)	(13,431)	(13,718)
Amortization of loss	1,204	2,641	3,939	9,078
Net other postretirement benefit cost	1,889	7,498	10,750	15,527
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	3,664	6,184	10,992	18,552
Interest cost on projected benefit obligation	10,568	6,827	31,704	20,481
Expected return on assets	(9,183)	(10,855)	(27,549)	(32,565)
Amortization of prior service cost (credit)	(5,640)	(6,388)	(16,920)	(19,164)
Amortization of loss	(2,862)	1,083	(8,586)	3,249
Net other postretirement benefit cost	(3,453)	(3,149)	(10,359)	(9,447)
Other Postretirement [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	741	1,114	2,223	3,342
Interest cost on projected benefit obligation	2,001	1,263	6,003	3,789
Expected return on assets	(3,778)	(4,483)	(11,334)	(13,449)
Amortization of prior service cost (credit)	524	471	1,572	1,413
Amortization of loss	43	218	129	654
Net other postretirement benefit cost	(469)	(1,417)	(1,407)	(4,251)
Other Postretirement [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	845	1,408	2,535	4,224
Interest cost on projected benefit obligation	2,233	1,443	6,699	4,329
Expected return on assets	0	0	0	0
Amortization of prior service cost (credit)	(951)	(1,158)	(2,853)	(3,474)
Amortization of loss	(1,764)	(186)	(5,292)	(558)
Net other postretirement benefit cost	363	1,507	1,089	4,521
Other Postretirement [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	220	339	660	1,017
Interest cost on projected benefit obligation	543	350	1,629	1,050
Expected return on assets	(1,179)	(1,394)	(3,537)	(4,182)
Amortization of prior service cost (credit)	(239)	(443)	(717)	(1,329)
Amortization of loss	21	56	63	168
Net other postretirement benefit cost	(634)	(1,092)	(1,902)	(3,276)
Other Postretirement [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	59	99	177	297
Interest cost on projected benefit obligation	290	174	870	522
Expected return on assets	(1,316)	(1,499)	(3,948)	(4,497)
Amortization of prior service cost (credit)	(229)	(229)	(687)	(687)
Amortization of loss	117	(225)	351	(675)
Net other postretirement benefit cost	(1,079)	(1,680)	(3,237)	(5,040)
Other Postretirement [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	202	331	606	993
Interest cost on projected benefit obligation	649	399	1,947	1,197
Expected return on assets	(2,194)	(2,568)	(6,582)	(7,704)
Amortization of prior service cost (credit)	(1,093)	(1,093)	(3,279)	(3,279)
Amortization of loss	229	162	687	486
Net other postretirement benefit cost	(2,207)	(2,769)	(6,621)	(8,307)
Other Postretirement [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	189	310	567	930
Interest cost on projected benefit obligation	432	279	1,296	837
Expected return on assets	(634)	(791)	(1,902)	(2,373)
Amortization of prior service cost (credit)	(73)	(80)	(219)	(240)
Amortization of loss	0	30	0	90
Net other postretirement benefit cost	(86)	(252)	(258)	(756)
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	21,800	5,900	39,800	23,300
Non Qualified Pension Plans [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	63	69	575	212
Non Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	24	24	76	77
Non Qualified Pension Plans [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	85	80	724	241
Non Qualified Pension Plans [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	33	28	99	84
Non Qualified Pension Plans [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	$ 63	$ 961	$ 190	$ 1,264