Retirement, Other Postretirement Benefits, And Defined Contribution Plans Schedule Of Amounts Recorded On The Balance Sheet (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Current liabilities	$ (68,336)	$ (61,815)
Non-current liabilities	(1,949,325)	(2,853,013)
Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	165,500	161,300
Accumulated other comprehensive income (before taxes)	17,000	16,700
Other Postretirement Benefits Plan [Member]
Employee contributions	22,023	37,176
Current liabilities	(42,000)	(38,963)
Non-current liabilities	(376,363)	(404,246)
Accumulated other comprehensive income (before taxes)	(34,350)	(59,216)
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	(3,168)	(128,837)
Entergy Arkansas [Member]
Non-current liabilities	(185,789)	(361,682)
Entergy Arkansas [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	2,482	2,626
Current liabilities	(248)	(218)
Non-current liabilities	(2,627)	(2,979)
Total funded status	(2,875)	(3,197)
Assets for Plan Benefits, Defined Benefit Plan	1,059	1,535
Accumulated other comprehensive income (before taxes)	0	0
Entergy Arkansas [Member] | Other Postretirement Benefits Plan [Member]
Employee contributions	5,637	7,792
Current liabilities	0	0
Assets for Plan Benefits, Defined Benefit Plan	94,312	94,823
Accumulated other comprehensive income (before taxes)	0	0
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	(85)	12,320
Entergy Louisiana [Member]
Non-current liabilities	(528,213)	(692,728)
Entergy Louisiana [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	1,445	1,802
Current liabilities	(186)	(193)
Non-current liabilities	(1,283)	(1,772)
Total funded status	(1,469)	(1,965)
Assets for Plan Benefits, Defined Benefit Plan	233	424
Accumulated other comprehensive income (before taxes)	10	18
Entergy Louisiana [Member] | Other Postretirement Benefits Plan [Member]
Employee contributions	5,186	8,269
Current liabilities	(15,839)	(15,580)
Non-current liabilities	(237,192)	(239,991)
Accumulated other comprehensive income (before taxes)	(34,518)	(37,792)
Defined Benefit Plan Regulatory Asset Before Tax	0	0
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	357	(23,508)
Entergy Mississippi [Member]
Non-current liabilities	(59,065)	(110,901)
Entergy Mississippi [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	3,377	3,345
Current liabilities	(190)	(181)
Non-current liabilities	(3,518)	(3,671)
Total funded status	(3,708)	(3,852)
Assets for Plan Benefits, Defined Benefit Plan	1,368	1,757
Accumulated other comprehensive income (before taxes)	0	0
Entergy Mississippi [Member] | Other Postretirement Benefits Plan [Member]
Employee contributions	1,386	2,122
Current liabilities	0	0
Assets for Plan Benefits, Defined Benefit Plan	36,887	31,485
Accumulated other comprehensive income (before taxes)	0	0
Defined Benefit Plan Regulatory Asset Before Tax		(7,239)
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	0	(4,428)
Entergy New Orleans [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	738	240
Current liabilities	(31)	(17)
Non-current liabilities	(1,039)	(230)
Total funded status	(1,070)	(247)
Assets for Plan Benefits, Defined Benefit Plan	251
Liability, Defined Benefit Pension Plan		(558)
Accumulated other comprehensive income (before taxes)	0	0
Entergy New Orleans [Member] | Other Postretirement Benefits Plan [Member]
Employee contributions	403	1,123
Current liabilities	0	0
Assets for Plan Benefits, Defined Benefit Plan	79,271	71,027
Accumulated other comprehensive income (before taxes)	0	0
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	0	(5,493)
Entergy Texas [Member] | Non-Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	7,355	7,949
Current liabilities	(3,080)	(633)
Non-current liabilities	(4,382)	(7,842)
Total funded status	(7,462)	(8,475)
Assets for Plan Benefits, Defined Benefit Plan		147
Liability, Defined Benefit Pension Plan	(706)
Accumulated other comprehensive income (before taxes)	0	0
Entergy Texas [Member] | Other Postretirement Benefits Plan [Member]
Employee contributions	1,491	2,456
Current liabilities	0	0
Assets for Plan Benefits, Defined Benefit Plan	110,324	99,863
Accumulated other comprehensive income (before taxes)	0	0
Defined Benefit Plan Regulatory Asset Before Tax		(18,468)
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	(3,776)	(22,441)
System Energy [Member]
Non-current liabilities	(76,104)	(125,412)
System Energy [Member] | Other Postretirement Benefits Plan [Member]
Employee contributions	1,353	1,732
Current liabilities	0	0
Assets for Plan Benefits, Defined Benefit Plan	6,775	4,918
Accumulated other comprehensive income (before taxes)	0	0
Defined Benefit Plan Regulatory Asset Before Tax	(1,718)	(1,064)
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	$ 69	$ (1,963)