Retirement And Other Postretirement Benefits (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 5,426	$ 6,562
Amortization of loss	(24,952)	(21,571)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(1,616)
Total	(21,142)	(15,009)
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,934	1,934
Amortization of loss	(1,257)	(1,332)
Total	677	602
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(99)	(65)
Amortization of loss	(21,957)	(18,450)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0
Total	(22,056)	(18,515)
Pension Plans Defined Benefit [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Amortization of loss	(867)	(865)
Total	(867)	(865)
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	5,595	6,717
Amortization of loss	(1,932)	(2,202)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0
Total	3,663	4,515
Other Postretirement [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,934	1,934
Amortization of loss	(388)	(465)
Total	1,546	1,469
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(70)	(90)
Amortization of loss	(1,063)	(919)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(1,616)
Total	(2,749)	(1,009)
Non Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Amortization of loss	(2)	(2)
Total	$ (2)	$ (2)