Retirement And Other Postretirement Benefits (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 5,248	$ 5,682	$ 10,496	$ 9,401
Amortization of loss	(27,534)	(27,619)	(62,063)	(54,937)
Total	(28,329)	(21,937)	(57,610)	(45,536)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(6,043)		(6,043)
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,230	1,698	2,460	2,787
Amortization of loss	(626)	(419)	(1,305)	(720)
Total	(796)	1,279	(245)	2,067
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(1,400)		(1,400)
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0	0	0
Amortization of loss	(26,443)	(26,461)	(59,883)	(52,923)
Total	(32,486)	(26,461)	(65,926)	(52,923)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(6,043)		(6,043)
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	(716)	(499)	(1,484)	(998)
Total	(2,116)	(499)	(2,884)	(998)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(1,400)		(1,400)
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	5,288	5,739	10,576	9,516
Amortization of loss	(496)	(327)	(990)	(352)
Total	4,792	5,412	9,586	9,164
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0		0
Other Postretirement [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,230	1,698	2,460	2,787
Amortization of loss	91	81	182	280
Total	1,321	1,779	2,642	3,067
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0		0
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(40)	(57)	(80)	(115)
Amortization of loss	(595)	(831)	(1,190)	(1,662)
Total	(635)	(888)	(1,270)	(1,777)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0		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)	(3)	(2)
Total	(1)	$ (1)	(3)	$ (2)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	$ 0		$ 0