Retirement And Other Postretirement Benefits (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 5,424	$ 6,564	$ 10,850	$ 13,126
Amortization of loss	(24,808)	(21,554)	(49,760)	(43,125)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(406)	(1,765)	(2,022)	(1,765)
Total	(19,790)	(16,755)	(40,932)	(31,764)
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,934	1,934	3,868	3,868
Amortization of loss	(1,256)	(1,332)	(2,513)	(2,664)
Total	678	602	1,355	1,204
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(99)	(65)	(198)	(130)
Amortization of loss	(21,957)	(18,450)	(43,914)	(36,899)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0		0
Total	(22,056)	(18,515)	(44,112)	(37,029)
Pension Plans Defined Benefit [Member] | Parent Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Recognized Net Gain (Loss) Due To Settlements, Pre Tax		0		0
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)	(1,734)	(1,730)
Total	(867)	(865)	(1,734)	(1,730)
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	5,594	6,718	11,189	13,435
Amortization of loss	(1,933)	(2,202)	(3,865)	(4,404)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0		0
Total	3,661	4,516	7,324	9,031
Other Postretirement [Member] | Parent Company [Member]
Defined Benefit Plan Disclosure [Line Items]
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	1,934	1,934	3,868	3,868
Amortization of loss	(387)	(465)	(775)	(930)
Total	1,547	1,469	3,093	2,938
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(71)	(89)	(141)	(179)
Amortization of loss	(918)	(902)	(1,981)	(1,822)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(406)	(1,765)	(2,022)	(1,765)
Total	(1,395)	(2,756)	(4,144)	(3,766)
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)	(4)	(4)
Total	$ (2)	$ (2)	$ (4)	$ (4)