Retirement And Other Postretirement Benefits (Schedule of Expected Benefit Payments) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
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	$ 48,401
Defined Benefit Plan, Plan Assets, Contributions by Employer	10,349
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	38,052
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	14,980
Defined Benefit Plan, Plan Assets, Contributions by Employer	4,660
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	10,320
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	4,931
Defined Benefit Plan, Plan Assets, Contributions by Employer	355
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	4,576
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	8,272
Defined Benefit Plan, Plan Assets, Contributions by Employer	1,292
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	6,980
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	16,650
Defined Benefit Plan, Plan Assets, Contributions by Employer	3,338
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	13,312
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	55,112
Defined Benefit Plan, Plan Assets, Contributions by Employer	12,008
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 43,104