Retirement And Other Postretirement Benefits (Components Of Qualified Net Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	$ 37,660	$ 45,241
Interest cost on projected benefit obligation	51,119	46,099
Expected return on assets	(103,607)	(105,713)
Amortization of loss	60,579	104,392
Net other postretirement benefit cost	45,751	90,019
Pension Plans Defined Benefit [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	6,858	7,418
Interest cost on projected benefit obligation	9,317	8,341
Expected return on assets	(19,247)	(19,670)
Amortization of loss	13,426	19,303
Net other postretirement benefit cost	10,354	15,392
Pension Plans Defined Benefit [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	9,137	10,043
Interest cost on projected benefit obligation	10,499	9,562
Expected return on assets	(21,133)	(22,538)
Amortization of loss	12,597	19,204
Net other postretirement benefit cost	11,100	16,271
Pension Plans Defined Benefit [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	2,130	2,364
Interest cost on projected benefit obligation	2,678	2,462
Expected return on assets	(5,203)	(5,587)
Amortization of loss	3,810	5,668
Net other postretirement benefit cost	3,415	4,907
Pension Plans Defined Benefit [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	752	796
Interest cost on projected benefit obligation	1,139	1,029
Expected return on assets	(2,515)	(2,622)
Amortization of loss	1,368	2,270
Net other postretirement benefit cost	744	1,473
Pension Plans Defined Benefit [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,632	1,801
Interest cost on projected benefit obligation	2,175	1,949
Expected return on assets	(4,937)	(5,237)
Amortization of loss	2,555	3,711
Net other postretirement benefit cost	1,425	2,224
Pension Plans Defined Benefit [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	2,045	2,314
Interest cost on projected benefit obligation	2,338	2,142
Expected return on assets	(4,623)	(4,778)
Amortization of loss	3,266	5,326
Net other postretirement benefit cost	3,026	5,004
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	6,184	6,645
Interest cost on projected benefit obligation	6,827	5,320
Expected return on assets	(10,855)	(10,805)
Amortization of prior service cost (credit)	(6,388)	(8,267)
Amortization of loss	1,083	713
Net other postretirement benefit cost	(3,149)	(6,394)
Other Postretirement [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,114	1,034
Interest cost on projected benefit obligation	1,263	932
Expected return on assets	(4,483)	(4,505)
Amortization of prior service cost (credit)	471	(280)
Amortization of loss	218	49
Net other postretirement benefit cost	(1,417)	(2,770)
Other Postretirement [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	1,408	1,544
Interest cost on projected benefit obligation	1,443	1,130
Expected return on assets	0	0
Amortization of prior service cost (credit)	(1,158)	(1,230)
Amortization of loss	(186)	(91)
Net other postretirement benefit cost	1,507	1,353
Other Postretirement [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	339	362
Interest cost on projected benefit obligation	350	278
Expected return on assets	(1,394)	(1,384)
Amortization of prior service cost (credit)	(443)	(444)
Amortization of loss	56	19
Net other postretirement benefit cost	(1,092)	(1,169)
Other Postretirement [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	99	109
Interest cost on projected benefit obligation	174	130
Expected return on assets	(1,499)	(1,438)
Amortization of prior service cost (credit)	(229)	(229)
Amortization of loss	(225)	(178)
Net other postretirement benefit cost	(1,680)	(1,606)
Other Postretirement [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	331	346
Interest cost on projected benefit obligation	399	317
Expected return on assets	(2,568)	(2,548)
Amortization of prior service cost (credit)	(1,093)	(936)
Amortization of loss	162	100
Net other postretirement benefit cost	(2,769)	(2,721)
Other Postretirement [Member] | System Energy [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	310	335
Interest cost on projected benefit obligation	279	220
Expected return on assets	(791)	(789)
Amortization of prior service cost (credit)	(80)	(109)
Amortization of loss	30	15
Net other postretirement benefit cost	(252)	(328)
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	10,200	4,600
Non Qualified Pension Plans [Member] | Entergy Arkansas [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	72	90
Non Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	27	44
Non Qualified Pension Plans [Member] | Entergy Mississippi [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	80	96
Non Qualified Pension Plans [Member] | Entergy New Orleans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	29	8
Non Qualified Pension Plans [Member] | Entergy Texas [Member]
Defined Benefit Plan Disclosure [Line Items]
Net other postretirement benefit cost	$ 215	$ 115