Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Credit Facilities) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019
Line of credit facility, maximum borrowing capacity		$ 3,500,000
Amount Drawn/ Outstanding		440,000
Amount of total borrowing capacity against which fronting commitments exist		20,000
Entergy Arkansas [Member]
Amount of total borrowing capacity against which fronting commitments exist		5,000
Entergy Arkansas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Sep. 14, 2024
Line of credit facility, maximum borrowing capacity		$ 150,000
Interest Rate		2.92%
Amount Drawn/ Outstanding		$ 0
Letters of Credit Outstanding, Amount		0
Entergy Arkansas [Member] | Credit Facility Of Twenty Million [Member]
Expiration Date	Apr. 30, 2020
Line of credit facility, maximum borrowing capacity		$ 20,000
Interest Rate		2.92%
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
Entergy Louisiana [Member] | Credit Facility Of Three Hundred and Fifty Million [Member]
Line of credit facility, maximum borrowing capacity		$ 350,000
Interest Rate		2.92%
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
Line of credit facility, maximum borrowing capacity		$ 35,000
Interest Rate		3.30%
Amount Drawn/ Outstanding		$ 0
Letters of Credit Outstanding, Amount		0
Entergy Mississippi [Member] | Credit Facility Of Ten Million [Member]
Expiration Date	May 31, 2020
Line of credit facility, maximum borrowing capacity		$ 10,000
Interest Rate		3.30%
Amount Drawn/ Outstanding		$ 0
Letters of Credit Outstanding, Amount		0
Entergy Mississippi [Member] | Credit Facility Of Thirty Seven Point Five Million [Member]
Expiration Date	May 31, 2020
Line of credit facility, maximum borrowing capacity		$ 37,500
Interest Rate		3.30%
Amount Drawn/ Outstanding		$ 0
Letters of Credit Outstanding, Amount		0
Entergy Texas [Member]
Amount of total borrowing capacity against which fronting commitments exist		30,000
Entergy Texas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Sep. 14, 2024
Line of credit facility, maximum borrowing capacity		$ 150,000
Interest Rate		3.30%
Amount Drawn/ Outstanding		$ 0
Letters of Credit Outstanding, Amount		1,300
Entergy New Orleans [Member]
Amount of total borrowing capacity against which fronting commitments exist		10,000
Entergy New Orleans [Member] | Credit Facility Of Twenty Five Million [Member]
Expiration Date	Nov. 20, 2021
Line of credit facility, maximum borrowing capacity		$ 25,000
Interest Rate		2.92%
Amount Drawn/ Outstanding		$ 20,000
Letters of Credit Outstanding, Amount		$ 800