Retirement And Other Postretirement Benefits (Reclassification Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 5,326	$ 5,426
Amortization of loss	(18,988)	(24,952)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(1,137)	(1,616)
Total	(14,799)	(21,142)
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,838	1,934
Amortization of loss	(527)	(1,257)
Total	1,311	677
Pension Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	(99)
Amortization of loss	(18,735)	(21,957)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	(1,137)	0
Total	(19,872)	(22,056)
Pension Plans Defined Benefit [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Amortization of loss	(699)	(867)
Total	(699)	(867)
Other Postretirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	5,375	5,595
Amortization of loss	308	(1,932)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0	0
Total	5,683	3,663
Other Postretirement [Member] | Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	1,838	1,934
Amortization of loss	174	(388)
Total	2,012	1,546
Non Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(49)	(70)
Amortization of loss	(561)	(1,063)
Recognized Net Gain (Loss) Due To Settlements, Pre Tax	0	(1,616)
Total	(610)	(2,749)
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)