Retirement And Other Postretirement Benefits (Components Of Qualified Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	$ 25,678	$ 37,660
Interest cost on projected benefit obligation	75,701	51,119
Expected return on assets	(98,133)	(103,607)
Amortization of loss	22,347	60,579
Net other postretirement benefit cost	164,020	45,751
Pension Plans Defined Benefit [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	4,749	6,858
Interest cost on projected benefit obligation	14,280	9,317
Expected return on assets	(18,076)	(19,247)
Amortization of loss	6,969	13,426
Net other postretirement benefit cost	30,096	10,354
Pension Plans Defined Benefit [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	6,280	9,137
Interest cost on projected benefit obligation	15,379	10,499
Expected return on assets	(19,233)	(21,133)
Amortization of loss	4,964	12,597
Net other postretirement benefit cost	43,389	11,100
Pension Plans Defined Benefit [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,482	2,130
Interest cost on projected benefit obligation	3,930	2,678
Expected return on assets	(4,884)	(5,203)
Amortization of loss	1,765	3,810
Net other postretirement benefit cost	13,948	3,415
Pension Plans Defined Benefit [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	491	752
Interest cost on projected benefit obligation	1,715	1,139
Expected return on assets	(2,267)	(2,515)
Amortization of loss	513	1,368
Net other postretirement benefit cost	2,145	744
Pension Plans Defined Benefit [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,107	1,632
Interest cost on projected benefit obligation	3,242	2,175
Expected return on assets	(4,152)	(4,937)
Amortization of loss	990	2,555
Net other postretirement benefit cost	10,865	1,425
Pension Plans Defined Benefit [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,467	2,045
Interest cost on projected benefit obligation	3,528	2,338
Expected return on assets	(4,538)	(4,623)
Amortization of loss	1,461	3,266
Net other postretirement benefit cost	6,717	3,026
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	3,664	6,184
Interest cost on projected benefit obligation	10,568	6,827
Expected return on assets	(9,183)	(10,855)
Amortization of prior service cost (credit)	(5,640)	(6,388)
Amortization of loss	(2,862)	1,083
Net other postretirement benefit cost	(3,453)	(3,149)
Other Postretirement [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	741	1,114
Interest cost on projected benefit obligation	2,001	1,263
Expected return on assets	(3,778)	(4,483)
Amortization of prior service cost (credit)	524	471
Amortization of loss	43	218
Net other postretirement benefit cost	(469)	(1,417)
Other Postretirement [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	845	1,408
Interest cost on projected benefit obligation	2,233	1,443
Expected return on assets	0	0
Amortization of prior service cost (credit)	(951)	(1,158)
Amortization of loss	(1,764)	(186)
Net other postretirement benefit cost	363	1,507
Other Postretirement [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	220	339
Interest cost on projected benefit obligation	543	350
Expected return on assets	(1,179)	(1,394)
Amortization of prior service cost (credit)	(239)	(443)
Amortization of loss	21	56
Net other postretirement benefit cost	(634)	(1,092)
Other Postretirement [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	59	99
Interest cost on projected benefit obligation	290	174
Expected return on assets	(1,316)	(1,499)
Amortization of prior service cost (credit)	(229)	(229)
Amortization of loss	117	(225)
Net other postretirement benefit cost	(1,079)	(1,680)
Other Postretirement [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	202	331
Interest cost on projected benefit obligation	649	399
Expected return on assets	(2,194)	(2,568)
Amortization of prior service cost (credit)	(1,093)	(1,093)
Amortization of loss	229	162
Net other postretirement benefit cost	(2,207)	(2,769)
Other Postretirement [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	189	310
Interest cost on projected benefit obligation	432	279
Expected return on assets	(634)	(791)
Amortization of prior service cost (credit)	(73)	(80)
Amortization of loss	0	30
Net other postretirement benefit cost	(86)	(252)
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	9,200	10,200
Non Qualified Pension Plans [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	450	72
Non Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	27	27
Non Qualified Pension Plans [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	552	80
Non Qualified Pension Plans [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	33	29
Non Qualified Pension Plans [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	$ 63	$ 215