Retirement And Other Postretirement Benefits (Schedule of Expected Benefit Payments) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024
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	19,862
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		$ 28,539
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	7,240
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		7,740
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	1,499
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		3,432
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	3,037
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		5,235
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	6,666
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		9,984
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	$ 22,784
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year		$ 32,328