Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Issuance Of Commercial Paper To Finance Acquisition And Ownership Of Nuclear Fuel) (Details)	9 Months Ended
	Sep. 30, 2015 USD ($)
Issuance of commercial paper to finance the acquisition and ownership of nuclear fuel
Amount Drawn/ Outstanding	$ 525,000,000
Entergy Arkansas VIE [Member]
Issuance of commercial paper to finance the acquisition and ownership of nuclear fuel
Expiration Date	Jun. 30, 2016
Amount of Facility	$ 85,000,000
Weighted Average Interest Rate on Borrowings	1.64%	[1]
Amount Drawn/ Outstanding	$ 37,200,000
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.125%
Entergy Gulf States Louisiana VIE [Member]
Issuance of commercial paper to finance the acquisition and ownership of nuclear fuel
Expiration Date	Jun. 30, 2016
Amount of Facility	$ 100,000,000
Weighted Average Interest Rate on Borrowings	1.38%	[1]
Amount Drawn/ Outstanding	$ 16,400,000
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.10%
Entergy Louisiana VIE [Member]
Issuance of commercial paper to finance the acquisition and ownership of nuclear fuel
Expiration Date	Jun. 30, 2016
Amount of Facility	$ 90,000,000
Weighted Average Interest Rate on Borrowings	1.55%	[1]
Amount Drawn/ Outstanding	$ 66,700,000
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.10%
System Energy VIE [Member]
Issuance of commercial paper to finance the acquisition and ownership of nuclear fuel
Expiration Date	Jun. 30, 2016
Amount of Facility	$ 125,000,000
Weighted Average Interest Rate on Borrowings	1.66%	[1]
Amount Drawn/ Outstanding	$ 14,600,000
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.125%

[1] Includes letter of credit fees and bank fronting fees on commercial paper issuances by the nuclear fuel company variable interest entities for Entergy Arkansas, Entergy Louisiana, and System Energy. The nuclear fuel company variable interest entity for Entergy Gulf States Louisiana does not issue commercial paper, but borrows directly on its bank credit facility.