Retirement And Other Postretirement Benefits (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 5,425	$ 6,565	$ 16,278	$ 19,691
Amortization of loss	(24,740)	(21,480)	(74,503)	(64,605)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(76)	(4,200)	(2,098)	(5,965)
Total	(19,391)	(19,115)	(60,323)	(50,879)
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,934	1,934	5,802	5,802
Amortization of loss	(1,257)	(1,332)	(3,770)	(3,996)
Total	677	602	2,032	1,806
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(99)	(65)	(297)	(195)
Amortization of loss	(21,958)	(18,451)	(65,870)	(55,351)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0	0	0	0
Total	(22,057)	(18,516)	(66,167)	(55,546)
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	(867)	(865)	(2,601)	(2,594)
Total	(867)	(865)	(2,601)	(2,594)
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	5,595	6,718	16,786	20,152
Amortization of loss	(1,932)	(2,202)	(5,801)	(6,606)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0	0	0	0
Total	3,663	4,516	10,985	13,546
Other Postretirement [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,934	1,934	5,802	5,802
Amortization of loss	(388)	(465)	(1,164)	(1,395)
Total	1,546	1,469	4,638	4,407
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(71)	(88)	(211)	(266)
Amortization of loss	(850)	(827)	(2,832)	(2,648)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(76)	(4,200)	(2,098)	(5,965)
Total	(997)	(5,115)	(5,141)	(8,879)
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	(2)	(2)	(5)	(7)
Total	$ (2)	$ (2)	$ (5)	$ (7)