Retirement And Other Postretirement Benefits (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Entergy Arkansas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 43,104,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	12,008,000
Entergy Louisiana [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	38,052,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	10,349,000
Entergy Mississippi [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	10,320,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	4,660,000
Entergy New Orleans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	4,576,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	355,000
Entergy Texas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	6,980,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	1,292,000
System Energy [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	13,312,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	3,338,000
Non Qualified Pension Plans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	2,700,000	$ 9,200,000
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	4,800,000
Non Qualified Pension Plans [Member] | Entergy Arkansas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	68,000	450,000
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	379,000
Non Qualified Pension Plans [Member] | Entergy Louisiana [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	51,000	27,000
Defined Benefit Plan, Plan Assets, Payment for Settlement	0
Non Qualified Pension Plans [Member] | Entergy Mississippi [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	83,000	552,000
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	453,000
Non Qualified Pension Plans [Member] | Entergy New Orleans [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	31,000	33,000
Defined Benefit Plan, Plan Assets, Payment for Settlement	0
Non Qualified Pension Plans [Member] | Entergy Texas [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	62,000	$ 63,000
Defined Benefit Plan, Plan Assets, Payment for Settlement	0
Pension Plan [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Contributions by Employer	58,000,000
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 270,000,000