Retirement And Other Postretirement Benefits (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 6,565	$ 7,354	$ 19,691	$ 22,064
Amortization of loss	(21,480)	(15,183)	(64,605)	(45,535)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(4,200)	(1,279)	(5,965)	(1,279)
Total	(19,115)	(9,108)	(50,879)	(24,750)
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,934	1,947	5,802	5,841
Amortization of loss	(1,332)	(1,570)	(3,996)	(4,712)
Total	602	377	1,806	1,129
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(65)	(270)	(195)	(810)
Amortization of loss	(18,451)	(12,482)	(55,351)	(37,446)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0		0
Total	(18,516)	(12,752)	(55,546)	(38,256)
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	(865)	(836)	(2,594)	(2,508)
Total	(865)	(836)	(2,594)	(2,508)
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	6,718	7,738	20,152	23,214
Amortization of loss	(2,202)	(2,063)	(6,606)	(6,189)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0		0
Total	4,516	5,675	13,546	17,025
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	1,947	5,802	5,841
Amortization of loss	(465)	(732)	(1,395)	(2,196)
Total	1,469	1,215	4,407	3,645
Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(88)	(114)	(266)	(340)
Amortization of loss	(827)	(638)	(2,648)	(1,900)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(4,200)	(1,279)	(5,965)	(1,279)
Total	(5,115)	(2,031)	(8,879)	(3,519)
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)	(7)	(8)
Total	$ (2)	$ (2)	$ (7)	$ (8)