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Commitments And Contingencies (Maximum Amounts Of Possible Assessments Per Occurrence) (Details) - Insurance-related Assessments [Member]
$ in Thousands
Dec. 31, 2021
USD ($)
Entergy Arkansas [Member]  
Commitments And Contingencies [Line Items]  
Loss Contingency, Estimate of Possible Loss $ 27,600
Entergy Louisiana [Member]  
Commitments And Contingencies [Line Items]  
Loss Contingency, Estimate of Possible Loss 49,200
Entergy Mississippi [Member]  
Commitments And Contingencies [Line Items]  
Loss Contingency, Estimate of Possible Loss 110
Entergy New Orleans [Member]  
Commitments And Contingencies [Line Items]  
Loss Contingency, Estimate of Possible Loss 110
System Energy [Member]  
Commitments And Contingencies [Line Items]  
Loss Contingency, Estimate of Possible Loss $ 21,400