Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Credit Facilities) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Entergy Arkansas [Member] | Credit Facility Of Twenty Five Million [Member]
Line of Credit Facility, Expiration Date	Apr. 30, 2024
Line of Credit Facility, Maximum Borrowing Capacity	$ 25.0
Line of Credit Facility, Interest Rate During Period	7.29%
Long-Term Line of Credit	$ 0.0
Letters of Credit Outstanding, Amount	$ 0.0
Entergy Arkansas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Line of Credit Facility, Expiration Date	Jun. 30, 2028
Line of Credit Facility, Maximum Borrowing Capacity	$ 150.0
Line of Credit Facility, Interest Rate During Period	6.58%
Long-Term Line of Credit	$ 0.0
Letters of Credit Outstanding, Amount	0.0
Amount of total borrowing capacity against which fronting commitments exist for the issuance of letters of credit	5.0
Entergy Louisiana [Member] | Credit Facility Of Three Hundred and Fifty Million [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 350.0
Line of Credit Facility, Interest Rate During Period	6.71%
Long-Term Line of Credit	$ 0.0
Letters of Credit Outstanding, Amount	0.0
Amount of total borrowing capacity against which fronting commitments exist for the issuance of letters of credit	$ 15.0
Entergy Louisiana [Member] | Credit Facility Of Three Hundred Fifty Million [Member]
Line of Credit Facility, Expiration Date	Jun. 30, 2028
Entergy Mississippi [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Line of Credit Facility, Expiration Date	Jul. 31, 2025
Line of Credit Facility, Maximum Borrowing Capacity	$ 150.0
Line of Credit Facility, Interest Rate During Period	6.58%
Long-Term Line of Credit	$ 0.0
Letters of Credit Outstanding, Amount	0.0
Entergy Mississippi [Member] | Credit Facility of Sixty Five Million [Member]
Letters of credit posted to cover financial transmission right exposure	$ 0.3
Entergy Texas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Line of Credit Facility, Expiration Date	Jun. 30, 2028
Line of Credit Facility, Maximum Borrowing Capacity	$ 150.0
Line of Credit Facility, Interest Rate During Period	6.71%
Long-Term Line of Credit	$ 0.0
Letters of Credit Outstanding, Amount	1.1
Amount of total borrowing capacity against which fronting commitments exist for the issuance of letters of credit	$ 30.0
Entergy New Orleans [Member] | Credit Facility Of Twenty Five Million [Member]
Line of Credit Facility, Expiration Date	Jun. 30, 2024
Line of Credit Facility, Maximum Borrowing Capacity	$ 25.0
Line of Credit Facility, Interest Rate During Period	7.08%
Long-Term Line of Credit	$ 0.0
Letters of Credit Outstanding, Amount	0.0
Amount of total borrowing capacity against which fronting commitments exist for the issuance of letters of credit	$ 10.0
Entergy Arkansas VIE [Member]
Line of Credit Facility, Expiration Date	Jun. 30, 2025
Entergy Louisiana River Bend VIE [Member]
Line of Credit Facility, Expiration Date	Jun. 30, 2025
Entergy Louisiana Waterford VIE [Member]
Line of Credit Facility, Expiration Date	Jun. 30, 2025
System Energy VIE [Member]
Line of Credit Facility, Expiration Date	Jun. 30, 2025