Retirement And Other Postretirement Benefits (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 5,248	$ 5,682	$ 15,744	$ 15,083
Amortization of loss	(13,490)	(27,620)	(75,553)	(82,561)
Total	(11,434)	(22,134)	(69,044)	(67,674)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(3,192)	(196)	(9,235)	(196)
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,230	1,695	3,690	4,479
Amortization of loss	(519)	(417)	(1,824)	(1,137)
Total	177	1,082	(68)	3,146
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(534)	(196)	(1,934)	(196)
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0	0	0
Amortization of loss	(12,439)	(26,462)	(72,322)	(79,387)
Total	(15,170)	(26,658)	(81,096)	(79,583)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(2,731)	(196)	(8,774)	(196)
Pension Plans Defined Benefit [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0	0	0
Amortization of loss	(609)	(497)	(2,093)	(1,495)
Total	(1,137)	(693)	(4,021)	(1,691)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(528)	(196)	(1,928)	(196)
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	5,288	5,739	15,864	15,255
Amortization of loss	(496)	(327)	(1,486)	(680)
Total	4,792	5,412	14,378	14,575
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0	0	0	0
Other Postretirement [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,230	1,695	3,690	4,479
Amortization of loss	91	81	273	361
Total	1,321	1,776	3,963	4,840
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0	0	0	0
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(40)	(57)	(120)	(172)
Amortization of loss	(555)	(831)	(1,745)	(2,494)
Total	(1,056)	(888)	(2,326)	(2,666)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(461)	0	(461)	0
Non Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0	0	0
Amortization of loss	(1)	(1)	(4)	(3)
Total	(7)	(1)	(10)	(3)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	$ (6)	$ 0	$ (6)	$ 0