Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Credit Facilities) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Amount of Facility	$ 3,500.0
Amount Drawn/ Outstanding	0.0
Entergy Arkansas [Member]
Amount of total borrowing capacity against which fronting commitments exist	5.0
Letters of Credit Outstanding, Amount	1.7
Entergy Arkansas [Member] | Credit Facility Of Twenty Five Million [Member]
Amount of Facility	$ 25.0
Interest Rate	7.27%
Amount Drawn/ Outstanding	$ 0.0
Letters of Credit Outstanding, Amount	0.0
Entergy Arkansas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Amount of Facility	$ 150.0
Interest Rate	6.54%
Amount Drawn/ Outstanding	$ 0.0
Letters of Credit Outstanding, Amount	0.0
Entergy Louisiana [Member]
Amount of total borrowing capacity against which fronting commitments exist	15.0
Letters of Credit Outstanding, Amount	0.9
Entergy Louisiana [Member] | Credit Facility Of Three Hundred Fifty Million [Member]
Amount of Facility	$ 350.0
Interest Rate	6.67%
Amount Drawn/ Outstanding	$ 0.0
Letters of Credit Outstanding, Amount	0.0
Entergy Mississippi [Member]
Letters of Credit Outstanding, Amount	0.6	$ 0.2
Entergy Mississippi [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Amount of Facility	$ 150.0
Interest Rate	6.54%
Amount Drawn/ Outstanding	$ 0.0
Letters of Credit Outstanding, Amount	0.0
Entergy New Orleans [Member]
Amount of total borrowing capacity against which fronting commitments exist	10.0
Letters of Credit Outstanding, Amount		0.2
Entergy New Orleans [Member] | Credit Facility Of Twenty Five Million [Member]
Amount of Facility	$ 25.0
Interest Rate	7.04%
Amount Drawn/ Outstanding	$ 0.0
Letters of Credit Outstanding, Amount	0.0
Entergy Texas [Member]
Amount of total borrowing capacity against which fronting commitments exist	30.0
Letters of Credit Outstanding, Amount	0.5	$ 2.4
Entergy Texas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Amount of Facility	$ 150.0
Interest Rate	6.67%
Amount Drawn/ Outstanding	$ 0.0
Letters of Credit Outstanding, Amount	$ 1.1