Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Credit Facilities) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Amount of Facility	$ 3,500,000,000
Amount Drawn/ Outstanding	150,000,000
Entergy Arkansas [Member]
Amount of total borrowing capacity against which fronting commitments exist	$ 5,000,000
Entergy Arkansas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Sep. 14, 2023
Amount of Facility	$ 150,000,000
Interest Rate	3.57%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Arkansas [Member] | Credit Facility Of Twenty Million [Member]
Expiration Date	Apr. 30, 2020
Amount of Facility	$ 20,000,000
Interest Rate	3.57%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	0
Entergy Louisiana [Member]
Amount of total borrowing capacity against which fronting commitments exist	$ 15,000,000
Entergy Louisiana [Member] | Credit Facility Of Three Hundred Fifty Million [Member]
Expiration Date	Sep. 14, 2023
Amount of Facility	$ 350,000,000
Interest Rate	3.57%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	0
Entergy Mississippi [Member]
Letters of Credit Outstanding, Amount	$ 200,000	$ 200,000
Entergy Mississippi [Member] | Credit Facility Of Thirty Seven Point Five Million [Member]
Expiration Date	May 31, 2020
Amount of Facility	$ 37,500,000
Interest Rate	3.82%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Mississippi [Member] | Credit Facility Of Thirty Five Million [Member]
Expiration Date	May 31, 2020
Amount of Facility	$ 35,000,000
Interest Rate	3.82%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 0
Entergy Mississippi [Member] | Credit Facility Of Ten Million [Member]
Expiration Date	May 31, 2020
Amount of Facility	$ 10,000,000
Interest Rate	3.82%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	0
Entergy New Orleans [Member]
Amount of total borrowing capacity against which fronting commitments exist	10,000,000
Letters of Credit Outstanding, Amount	$ 10,200
Entergy New Orleans [Member] | Credit Facility Of Twenty Five Million [Member]
Expiration Date	Nov. 20, 2021
Amount of Facility	$ 25,000,000
Interest Rate	3.59%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	800,000
Entergy Texas [Member]
Amount of total borrowing capacity against which fronting commitments exist	30,000,000
Letters of Credit Outstanding, Amount	$ 2,200,000	$ 4,100,000
Entergy Texas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Sep. 14, 2023
Amount of Facility	$ 150,000,000
Interest Rate	3.82%
Amount Drawn/ Outstanding	$ 0
Letters of Credit Outstanding, Amount	$ 1,300,000