Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Issuance Of Commercial Paper To Finance Acquisition And Ownership Of Nuclear Fuel) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
Entergy Arkansas VIE [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date	Jun. 30, 2024
Entergy Arkansas VIE [Member] | Credit Facility of Eighty Million
Line of Credit Facility [Line Items]
Amount of Facility	$ 80.0
Weighted Average Interest Rate on Borrowings	1.17%
Amount Drawn/ Outstanding	$ 4.8
System Energy VIE [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date	Jun. 30, 2024
System Energy VIE [Member] | Credit Facility of One Hundred and Twenty Million
Line of Credit Facility [Line Items]
Amount of Facility	$ 120.0
Weighted Average Interest Rate on Borrowings	1.16%
Amount Drawn/ Outstanding	$ 36.1
Entergy Louisiana Waterford VIE [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date	Jun. 30, 2024
Entergy Louisiana Waterford VIE [Member] | Credit Facility of One Hundred and Five Million
Line of Credit Facility [Line Items]
Amount of Facility	$ 105.0
Weighted Average Interest Rate on Borrowings	1.16%
Amount Drawn/ Outstanding	$ 39.6
Entergy Louisiana River Bend VIE [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date	Jun. 30, 2024
Entergy Louisiana River Bend VIE [Member] | Credit Facility of One Hundred and Five Million
Line of Credit Facility [Line Items]
Amount of Facility	$ 105.0
Weighted Average Interest Rate on Borrowings	1.15%
Amount Drawn/ Outstanding	$ 42.7