Retirement And Other Postretirement Benefits (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 5,248	$ 3,719
Amortization of loss	(34,529)	(27,318)
Total	(29,281)	(23,599)
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,230	1,089
Amortization of loss	(679)	(301)
Total	551	788
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Amortization of loss	(33,439)	(26,462)
Total	(33,439)	(26,462)
Pension Plans Defined Benefit [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Amortization of loss	(769)	(499)
Total	(769)	(499)
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	5,288	3,776
Amortization of loss	(495)	(25)
Total	4,793	3,751
Other Postretirement [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,230	1,089
Amortization of loss	91	199
Total	1,321	1,288
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(40)	(57)
Amortization of loss	(595)	(831)
Total	(635)	(888)
Non Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Amortization of loss	(1)	(1)
Total	$ (1)	$ (1)