Retirement, Other Postretirement Benefits, And Defined Contribution Plans Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Reclassification Out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	$ 21,700	$ 26,251
Amortization of loss	(99,186)	(86,002)
Settlement loss	(3,207)	(7,544)
Total	(80,693)	(67,295)
Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(281)	(355)
Amortization of loss	(3,628)	(3,397)
Settlement loss	(2,379)	(7,544)
Total	(6,288)	(11,296)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	(398)	(261)
Amortization of loss	(87,828)	(73,800)
Settlement loss	(828)	0
Total	(89,054)	(74,061)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	22,379	26,867
Amortization of loss	(7,730)	(8,805)
Settlement loss	0	0
Total	14,649	18,062
Entergy Louisiana [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	7,735	7,734
Amortization of loss	(5,025)	(5,327)
Total	2,710	2,407
Entergy Louisiana [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	(1)
Amortization of loss	(7)	(9)
Total	(7)	(10)
Entergy Louisiana [Member] | Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	0	0
Amortization of loss	(3,468)	(3,459)
Total	(3,468)	(3,459)
Entergy Louisiana [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Amortization of prior service cost	7,735	7,735
Amortization of loss	(1,550)	(1,859)
Total	$ 6,185	$ 5,876