Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Issuance Of Commercial Paper To Finance Acquisition And Ownership Of Nuclear Fuel) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Issuance of commercial paper to finance the acquisition and ownership of nuclear fuel
Amount Drawn/ Outstanding	$ 835.0
Entergy Arkansas VIE [Member]
Issuance of commercial paper to finance the acquisition and ownership of nuclear fuel
Line of Credit Facility, Expiration Date	Jun. 30, 2016
Amount of Facility	$ 85.0
Weighted Average Interest Rate on Borrowings	1.98%	[1]
Amount Drawn/ Outstanding	$ 11.7
System Energy VIE [Member]
Issuance of commercial paper to finance the acquisition and ownership of nuclear fuel
Line of Credit Facility, Expiration Date	Jun. 30, 2016
Amount of Facility	$ 125.0
Amount Drawn/ Outstanding	$ 0.0
Entergy Louisiana Waterford VIE [Member]
Issuance of commercial paper to finance the acquisition and ownership of nuclear fuel
Line of Credit Facility, Expiration Date	Jun. 30, 2016
Amount of Facility	$ 90.0
Weighted Average Interest Rate on Borrowings	1.59%	[1]
Amount Drawn/ Outstanding	$ 60.4
Entergy Louisiana River Bend VIE [Member]
Issuance of commercial paper to finance the acquisition and ownership of nuclear fuel
Line of Credit Facility, Expiration Date	Jun. 30, 2016
Amount of Facility	$ 100.0
Weighted Average Interest Rate on Borrowings	1.38%	[1]
Amount Drawn/ Outstanding	$ 0.6

[1] (a)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 Louisiana River Bend does not issue commercial paper, but borrows directly on its bank credit facility.