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, 2023	Dec. 31, 2022
Liability, Defined Benefit Plan, Current	$ (59,508)	$ (104,845)
Liability, Defined Benefit Plan, Noncurrent	(648,413)	(1,213,555)
Non Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	77,900	140,000
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	3,900	8,700
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	18,669	22,486
Liability, Defined Benefit Plan, Current	(45,706)	(42,484)
Liability, Defined Benefit Plan, Noncurrent	(118,797)	(199,546)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	(150,977)	(178,823)
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	(4,434)	(858)
Defined Benefit Plan, Plan Assets, Contributions by Employer	49,126	52,835
Defined Benefit Plan Regulatory Liability Before Tax	(55,082)	(12,367)
Entergy Arkansas [Member]
Liability, Defined Benefit Plan, Noncurrent	(8,901)	(118,020)
Entergy Arkansas [Member] | Non Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	1,935	2,192
Liability, Defined Benefit Plan, Current	(276)	(234)
Liability, Defined Benefit Plan, Noncurrent	(2,037)	(2,199)
Liability, Defined Benefit Plan	(2,313)	(2,433)
Assets for Plan Benefits, Defined Benefit Plan	857	512
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	0	0
Entergy Arkansas [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	3,131	5,521
Liability, Defined Benefit Plan, Current	0	0
Assets for Plan Benefits, Defined Benefit Plan	118,827	91,099
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	0	0
Defined Benefit Plan Regulatory Asset Before Tax		12,303
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	0	273
Defined Benefit Plan, Plan Assets, Contributions by Employer	582	1,573
Defined Benefit Plan Regulatory Liability Before Tax	(12,997)
Entergy Louisiana [Member]
Liability, Defined Benefit Plan, Noncurrent	(271,928)	(389,631)
Entergy Louisiana [Member] | Non Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	2,494	1,197
Liability, Defined Benefit Plan, Current	(308)	(184)
Liability, Defined Benefit Plan, Noncurrent	(2,266)	(1,013)
Liability, Defined Benefit Plan	(2,574)	(1,197)
Assets for Plan Benefits, Defined Benefit Plan	1,604	119
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	67	5
Entergy Louisiana [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	4,317	5,081
Liability, Defined Benefit Plan, Current	(15,049)	(15,356)
Liability, Defined Benefit Plan, Noncurrent	(155,090)	(167,770)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	(88,354)	(94,323)
Defined Benefit Plan Regulatory Asset Before Tax	0	0
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	(4,434)	323
Defined Benefit Plan, Plan Assets, Contributions by Employer	20,451	16,187
Entergy Mississippi [Member]
Liability, Defined Benefit Plan, Noncurrent	0	(23,742)
Entergy Mississippi [Member] | Non Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	3,187	3,594
Liability, Defined Benefit Plan, Current	(474)	(214)
Liability, Defined Benefit Plan, Noncurrent	(2,895)	(3,616)
Liability, Defined Benefit Plan	(3,369)	(3,830)
Assets for Plan Benefits, Defined Benefit Plan	1,303	1,291
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	0	0
Entergy Mississippi [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	1,386	1,443
Liability, Defined Benefit Plan, Current	0	0
Assets for Plan Benefits, Defined Benefit Plan	44,318	35,131
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	0	0
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	0	(1,300)
Defined Benefit Plan, Plan Assets, Contributions by Employer	646	759
Defined Benefit Plan Regulatory Liability Before Tax	(7,497)	(1,484)
Entergy New Orleans [Member] | Non Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	814	719
Liability, Defined Benefit Plan, Current	(106)	(32)
Liability, Defined Benefit Plan, Noncurrent	(928)	(992)
Liability, Defined Benefit Plan	(1,034)	(1,024)
Assets for Plan Benefits, Defined Benefit Plan	5	111
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	0	0
Entergy New Orleans [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	374	440
Liability, Defined Benefit Plan, Current	0	0
Assets for Plan Benefits, Defined Benefit Plan	78,851	67,169
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	0	0
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	0	0
Defined Benefit Plan, Plan Assets, Contributions by Employer	213	333
Defined Benefit Plan Regulatory Liability Before Tax	(7,825)	(669)
Entergy Texas [Member] | Non Qualified Pension Plans [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	3,701	3,776
Liability, Defined Benefit Plan, Current	(448)	(448)
Liability, Defined Benefit Plan, Noncurrent	(3,314)	(3,402)
Liability, Defined Benefit Plan	(3,762)	(3,850)
Liability, Defined Benefit Pension Plan	(2,526)	(2,615)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	0	0
Entergy Texas [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	680	924
Liability, Defined Benefit Plan, Current	0	0
Assets for Plan Benefits, Defined Benefit Plan	109,701	95,317
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	0	0
Defined Benefit Plan Regulatory Asset Before Tax	2,752	8,085
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	0	0
Defined Benefit Plan Refund to Employer		(23)
Defined Benefit Plan, Plan Assets, Contributions by Employer	235
System Energy [Member]
Liability, Defined Benefit Plan, Noncurrent	(19,491)	(40,750)
System Energy [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	994	1,222
Liability, Defined Benefit Plan, Current	0	0
Assets for Plan Benefits, Defined Benefit Plan	11,624	7,160
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	0	0
Defined Benefit Plan Regulatory Asset Before Tax		3,265
Defined Benefit Plan, Accumulated Benefit Obligation, Increase (Decrease) for Plan Amendment	0	141
Defined Benefit Plan, Plan Assets, Contributions by Employer	480	$ 944
Defined Benefit Plan Regulatory Liability Before Tax	$ (384)