Retirement, Other Postretirement Benefits, And Defined Contribution Plans (Schedule Of Amounts Recorded On The Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current liabilities	$ (66,184)	$ (61,240)
Non-current liabilities	(2,798,265)	(2,616,085)
Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	143,400	131,900
Accumulated other comprehensive income (before taxes)	24,900	19,200
Entergy Arkansas [Member]
Non-current liabilities	(319,075)	(313,295)
Entergy Arkansas [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	2,248	2,519
Current liabilities	(249)	(198)
Non-current liabilities	(2,506)	(2,554)
Total funded status	(2,755)	(2,752)
Assets for Plan Benefits, Defined Benefit Plan	1,232	1,314
Accumulated other comprehensive income (before taxes)		0
Entergy Louisiana [Member]
Non-current liabilities	(677,619)	(643,171)
Entergy Louisiana [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	1,682	1,881
Current liabilities	(216)	(229)
Non-current liabilities	(1,467)	(1,652)
Total funded status	(1,683)	(1,881)
Assets for Plan Benefits, Defined Benefit Plan	3	79
Accumulated other comprehensive income (before taxes)		5
Entergy Mississippi [Member]
Non-current liabilities	(99,406)	(93,100)
Entergy Mississippi [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	2,938	2,427
Current liabilities	(357)	(128)
Non-current liabilities	(2,930)	(2,604)
Total funded status	(3,287)	(2,732)
Assets for Plan Benefits, Defined Benefit Plan	1,432	1,009
Accumulated other comprehensive income (before taxes)		0
Entergy New Orleans [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	230	206
Current liabilities	(17)	(16)
Non-current liabilities	(215)	(191)
Total funded status	(232)	(207)
Liability, Defined Benefit Pension Plan	(559)	(579)
Accumulated other comprehensive income (before taxes)		0
Entergy Texas [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	7,391	7,724
Current liabilities	(723)	(672)
Non-current liabilities	(7,060)	(7,280)
Total funded status	(7,783)	(7,952)
Liability, Defined Benefit Pension Plan	(603)	(517)
Accumulated other comprehensive income (before taxes)		0
System Energy [Member]
Non-current liabilities	$ (109,816)	$ (98,639)