Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Credit Facilities) (Details)	9 Months Ended
	Sep. 30, 2015 USD ($)
Amount of Facility	$ 3,500,000,000
Amount Drawn/ Outstanding	$ 525,000,000
Entergy Arkansas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Aug. 14, 2020
Amount of Facility	$ 150,000,000	[1]
Interest Rate	1.69%	[2]
Amount Drawn/ Outstanding	$ 0
Entergy Arkansas [Member] | Credit Facility Of Twenty Million [Member]
Expiration Date	Apr. 30, 2016
Amount of Facility	$ 20,000,000	[3]
Interest Rate	1.69%	[2]
Amount Drawn/ Outstanding	$ 0
Entergy Gulf States Louisiana [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Aug. 14, 2020
Amount of Facility	$ 150,000,000	[4]
Interest Rate	3.50%	[2]
Amount Drawn/ Outstanding	$ 35,000,000
Entergy Louisiana [Member] | Credit Facility Of Two Hundred Million [Member]
Expiration Date	Aug. 14, 2020
Amount of Facility	$ 200,000,000	[5]
Interest Rate	1.44%	[2]
Amount Drawn/ Outstanding	$ 0
Entergy Mississippi [Member] | Credit Facility Of Thirty Seven Point Five Million [Member]
Expiration Date	May 31, 2016
Amount of Facility	$ 37,500,000.0	[6]
Interest Rate	1.69%	[2]
Amount Drawn/ Outstanding	$ 0
Entergy Mississippi [Member] | Credit Facility Of Thirty Five Million [Member]
Expiration Date	May 31, 2016
Amount of Facility	$ 35,000,000	[6]
Interest Rate	1.69%	[2]
Amount Drawn/ Outstanding	$ 0
Entergy Mississippi [Member] | Credit Facility Of Twenty Million [Member]
Expiration Date	May 31, 2016
Amount of Facility	$ 20,000,000	[6]
Interest Rate	1.69%	[2]
Amount Drawn/ Outstanding	$ 0
Entergy Mississippi [Member] | Credit Facility Of Ten Million [Member]
Expiration Date	May 31, 2016
Amount of Facility	$ 10,000,000	[6]
Interest Rate	1.69%	[2]
Amount Drawn/ Outstanding	$ 0
Entergy New Orleans [Member] | Credit Facility Of Twenty Five Million [Member]
Expiration Date	Nov. 30, 2015
Amount of Facility	$ 25,000,000
Interest Rate	1.94%	[2]
Amount Drawn/ Outstanding	$ 0
Entergy Texas [Member] | Credit Facility Of One Hundred And Fifty Million [Member]
Expiration Date	Aug. 14, 2020
Amount of Facility	$ 150,000,000	[7]
Interest Rate	1.69%	[2]
Amount Drawn/ Outstanding	$ 0

[1] The credit facility allows Entergy Arkansas to issue letters of credit against 50% of the borrowing capacity of the facility. As of September 30, 2015, no letters of credit were outstanding.

[2] The interest rate is the rate as of September 30, 2015 that would most likely apply to outstanding borrowings under the facility.

[3] Borrowings under the Entergy Arkansas credit facility may be secured by a security interest in its accounts receivable at Entergy Arkansas’s option.

[4] The credit facility allows Entergy Gulf States Louisiana to issue letters of credit against 50% of the borrowing capacity of the facility. As of September 30, 2015, no letters of credit were outstanding.

[5] The credit facility allows Entergy Louisiana to issue letters of credit against 50% of the borrowing capacity of the facility. As of September 30, 2015, $3 million in letters of credit were outstanding.

[6] Borrowings under the Entergy Mississippi credit facilities may be secured by a security interest in its accounts receivable at Entergy Mississippi’s option.

[7] The credit facility allows Entergy Texas to issue letters of credit against 50% of the borrowing capacity of the facility. As of September 30, 2015, $1.3 million in letters of credit were outstanding.