Retirement, Other Postretirement Benefits, And Defined Contribution Plans Expected Employer Contributions (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Other Postretirement Benefits Plan [Member]
Change in Plan Assets
Expected Employer Contributions	$ 42,800
Entergy Arkansas [Member] | Pension Plans, Defined Benefit [Member]
Change in Plan Assets
Expected Employer Contributions	40,840
Entergy Arkansas [Member] | Other Postretirement Benefits Plan [Member]
Change in Plan Assets
Expected Employer Contributions	517
Entergy Louisiana [Member] | Pension Plans, Defined Benefit [Member]
Change in Plan Assets
Expected Employer Contributions	22,917
Entergy Louisiana [Member] | Other Postretirement Benefits Plan [Member]
Change in Plan Assets
Expected Employer Contributions	15,845
Entergy Mississippi [Member] | Pension Plans, Defined Benefit [Member]
Change in Plan Assets
Expected Employer Contributions	12,852
Entergy Mississippi [Member] | Other Postretirement Benefits Plan [Member]
Change in Plan Assets
Expected Employer Contributions	130
Entergy New Orleans [Member] | Pension Plans, Defined Benefit [Member]
Change in Plan Assets
Expected Employer Contributions	922
Entergy New Orleans [Member] | Other Postretirement Benefits Plan [Member]
Change in Plan Assets
Expected Employer Contributions	175
Entergy Texas [Member] | Pension Plans, Defined Benefit [Member]
Change in Plan Assets
Expected Employer Contributions	1,924
Entergy Texas [Member] | Other Postretirement Benefits Plan [Member]
Change in Plan Assets
Expected Employer Contributions	66
System Energy [Member] | Pension Plans, Defined Benefit [Member]
Change in Plan Assets
Expected Employer Contributions	12,760
System Energy [Member] | Other Postretirement Benefits Plan [Member]
Change in Plan Assets
Expected Employer Contributions	$ 22