Commitments And Contingencies (Schedule of Loss Contingencies by Contingency) (Details) - Insurance-related Assessments [Member] $ in Millions	Dec. 31, 2025 USD ($)
Entergy Arkansas [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 20.1
Entergy Louisiana [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	40.1
Entergy Mississippi [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	0.3
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	$ 15.5