Retirement And Other Postretirement Benefits (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 5,682	$ 5,325	$ 15,083	$ 15,977
Amortization of loss	(27,620)	(20,919)	(82,561)	(58,888)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(196)	(16,630)	(196)	(18,685)
Total	(22,134)	(32,224)	(67,674)	(61,596)
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,695	1,837	4,479	5,511
Amortization of loss	(417)	(526)	(1,137)	(1,578)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(196)		(196)
Total	1,082	1,311	3,146	3,933
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0	0	0
Amortization of loss	(26,462)	(20,686)	(79,387)	(58,156)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(196)	(16,257)	(196)	(17,557)
Total	(26,658)	(36,943)	(79,583)	(75,713)
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	(497)	(699)	(1,495)	(2,096)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(196)		(196)
Total	(693)	(699)	(1,691)	(2,096)
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	5,739	5,375	15,255	16,125
Amortization of loss	(327)	308	(680)	923
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0	0	0	0
Total	5,412	5,683	14,575	17,048
Other Postretirement [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,695	1,837	4,479	5,511
Amortization of loss	81	174	361	522
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0		0
Total	1,776	2,011	4,840	6,033
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(57)	(50)	(172)	(148)
Amortization of loss	(831)	(541)	(2,494)	(1,655)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0	(373)	0	(1,128)
Total	(888)	(964)	(2,666)	(2,931)
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)	(4)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0		0
Total	$ (1)	$ (1)	$ (3)	$ (4)