Commitments And Contingencies (Maximum Amounts Of Possible Assessments Per Occurrence) (Details) - Insurance-related Assessments [Member] $ in Millions	Apr. 01, 2023 USD ($)
Entergy Arkansas [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 19.4
Entergy Louisiana [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	36.6
Entergy Mississippi [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	0.1
Entergy New Orleans [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	0.1
System Energy [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 14.3