Asset Retirement Obligations (Difference Between Estimated Incurred Removal Costs And Estimated Removal Costs Recovered In Rates) (Details) - Removal Costs [Member] - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Entergy Arkansas [Member]
Asset Retirement Obligations [Line Items]
Regulatory Assets	$ 267.1	$ 224.3
Entergy Louisiana [Member]
Asset Retirement Obligations [Line Items]
Regulatory Assets	418.8	848.2
Entergy Mississippi [Member]
Asset Retirement Obligations [Line Items]
Regulatory Assets	159.4	136.8
Entergy New Orleans [Member]
Asset Retirement Obligations [Line Items]
Regulatory Assets	56.3	91.7
Entergy Texas [Member]
Asset Retirement Obligations [Line Items]
Regulatory Assets	62.9	98.1
System Energy [Member]
Asset Retirement Obligations [Line Items]
Regulatory Assets	$ 94.4	$ 89.7