Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Summary Of The Borrowings Outstanding And Capacity Available Under The Facility) (Details) $ in Millions	Sep. 30, 2022 USD ($)
Summary of the borrowings outstanding and capacity available under the facility
Capacity	$ 3,500
Amount Drawn/ Outstanding	150
Letters of Credit	3
Capacity Available	3,347
Line of Credit Facility [Line Items]
Amount of Facility	3,500
Credit Facility [Member]
Summary of the borrowings outstanding and capacity available under the facility
Capacity	3,500
Line of Credit Facility [Line Items]
Amount of Facility	3,500
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Mississippi [Member]
Summary of the borrowings outstanding and capacity available under the facility
Capacity	150
Amount Drawn/ Outstanding	100
Line of Credit Facility [Line Items]
Amount of Facility	$ 150