Retirement And Other Postretirement Benefits (Schedule of Expected Benefit Payments) (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2025
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Contributions by Employer			$ 147,600
Qualified Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Service Cost	$ 23,454	$ 23,358	70,688	$ 70,104
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	23,874	0	23,874	325,253
Defined Benefit Plan, Other Cost (Credit)	(5,780)	0	(5,780)	0
Entergy Louisiana [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	41,253		41,253
Defined Benefit Plan, Plan Assets, Contributions by Employer			25,383
Entergy Louisiana [Member] | Qualified Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Service Cost	5,403	5,550	16,311	16,652
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	5,982		5,982	0
Defined Benefit Plan, Other Cost (Credit)	(2,472)		(2,472)
Entergy Louisiana [Member] | Subsequent Event [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year					$ 15,870
Entergy Mississippi [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	8,064		8,064
Defined Benefit Plan, Plan Assets, Contributions by Employer			5,322
Entergy Mississippi [Member] | Qualified Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Service Cost	1,296	1,284	3,904	3,852
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	146		146	0
Defined Benefit Plan, Other Cost (Credit)	0		0
Entergy Mississippi [Member] | Subsequent Event [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year					2,742
Entergy New Orleans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	5,016		5,016
Defined Benefit Plan, Plan Assets, Contributions by Employer			3,080
Entergy New Orleans [Member] | Qualified Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Service Cost	410	441	1,232	1,321
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	6,195		6,195	0
Defined Benefit Plan, Other Cost (Credit)	(1,934)		(1,934)
Entergy New Orleans [Member] | Subsequent Event [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year					1,936
Entergy Texas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	7,725		7,725
Defined Benefit Plan, Plan Assets, Contributions by Employer			4,735
Entergy Texas [Member] | Qualified Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Service Cost	1,008	963	3,056	2,886
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	617		617	0
Defined Benefit Plan, Other Cost (Credit)	0		0
Entergy Texas [Member] | Subsequent Event [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year					2,990
System Energy [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	15,668		15,668
Defined Benefit Plan, Plan Assets, Contributions by Employer			9,498
System Energy [Member] | Qualified Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Service Cost	1,352	1,380	4,096	4,147
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	512		512	611
Defined Benefit Plan, Other Cost (Credit)	0		0
System Energy [Member] | Subsequent Event [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year					6,170
Entergy Arkansas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	35,544		35,544
Defined Benefit Plan, Plan Assets, Contributions by Employer			23,160
Entergy Arkansas [Member] | Qualified Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Service Cost	4,385	$ 4,101	13,239	12,300
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	1,454		1,454	$ 0
Defined Benefit Plan, Other Cost (Credit)	$ 0		$ 0
Entergy Arkansas [Member] | Subsequent Event [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year					$ 12,384