Retirement And Other Postretirement Benefits (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 3,719	$ 5,326
Amortization of loss	(27,318)	(18,988)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax		(1,137)
Total	(23,599)	(14,799)
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,089	1,838
Amortization of loss	(301)	(527)
Total	788	1,311
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Amortization of loss	(26,462)	(18,735)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax		(1,137)
Total	(26,462)	(19,872)
Pension Plans Defined Benefit [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Amortization of loss	(499)	(699)
Total	(499)	(699)
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	3,776	5,375
Amortization of loss	(25)	308
Recognized Net Gain (Loss) Due To Settlements, Pre Tax		0
Total	3,751	5,683
Other Postretirement [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,089	1,838
Amortization of loss	199	174
Total	1,288	2,012
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(57)	(49)
Amortization of loss	(831)	(561)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax		0
Total	(888)	(610)
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)	(2)
Total	$ (1)	$ (2)