Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Narrative) (Details) (USD $)	3 Months Ended		1 Months Ended
	Mar. 31, 2015		Apr. 30, 2015
Debt Instrument [Line Items]
Amount of Facility	$ 3,500,000,000
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Line of credit facility, commitment fee percentage	0.275%
Commercial Paper program limit	1,500,000,000.0
Commercial Paper Amount Outstanding	762,000,000
Amount Drawn/ Outstanding	508,000,000
Commercial Paper Program [Member]
Debt Instrument [Line Items]
Debt, weighted average interest rate	0.85%
Credit Facility [Member]
Debt Instrument [Line Items]
Debt, weighted average interest rate	1.93%
Entergy Arkansas [Member]
Debt Instrument [Line Items]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Consolidated debt ratio	65.00%
Entergy Gulf States Louisiana [Member]
Debt Instrument [Line Items]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Consolidated debt ratio	65.00%
Entergy Louisiana [Member]
Debt Instrument [Line Items]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Consolidated debt ratio	65.00%
Entergy Mississippi [Member]
Debt Instrument [Line Items]
Consolidated debt ratio	65.00%
Entergy Texas [Member]
Debt Instrument [Line Items]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Letters of Credit Outstanding, Amount	1,300,000
Consolidated debt ratio	65.00%
Entergy Nuclear Vermont Yankee [Member]
Debt Instrument [Line Items]
Amount of Facility	60,000,000
Line of credit facility, commitment fee percentage	0.25%
Line of Credit Facility, Interest Rate During Period	1.93%
Uncommitted Credit Facility	85,000,000
Entergy New Orleans [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	1.50%
Consolidated debt ratio	65.00%
System Energy VIE [Member]
Debt Instrument [Line Items]
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.125%
Consolidated debt ratio of total capitalization	70.00%
Amount Drawn/ Outstanding	0
System Energy VIE [Member] | Three Point Seven Eight Percent Series I Notes Due October Two Thousand Eighteen [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.78%
System Energy VIE [Member] | Five Point Three Three Percent Series G Notes Due April Two Thousand Fifteen [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	5.33%
Entergy Arkansas VIE [Member]
Debt Instrument [Line Items]
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.125%
Consolidated debt ratio of total capitalization	70.00%
Amount Drawn/ Outstanding	19,500,000
Entergy Arkansas VIE [Member] | Three Point Six Five Percent Series L Notes Due July Two Thousand Twenty One [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.65%
Entergy Louisiana VIE [Member]
Debt Instrument [Line Items]
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.10%
Consolidated debt ratio of total capitalization	70.00%
Amount Drawn/ Outstanding	27,300,000
Entergy Louisiana VIE [Member] | Three Point Nine Two Percent Series H Dues February Two Thousand Twenty One [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	3.92%
Entergy Gulf States Louisiana VIE [Member]
Debt Instrument [Line Items]
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.10%
Consolidated debt ratio of total capitalization	70.00%
Amount Drawn/ Outstanding	41,000,000
Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	0.275%
Consolidated debt ratio	65.00%
Minimum [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	0.125%
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Arkansas [Member]
Debt Instrument [Line Items]
Amount of Facility	150,000,000	[1]
Line of Credit Facility, Interest Rate During Period	1.68%	[2]
Amount Drawn/ Outstanding	0
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Gulf States Louisiana [Member]
Debt Instrument [Line Items]
Amount of Facility	150,000,000	[3]
Line of Credit Facility, Interest Rate During Period	1.43%	[2]
Amount Drawn/ Outstanding	0
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Texas [Member]
Debt Instrument [Line Items]
Amount of Facility	150,000,000	[4]
Line of Credit Facility, Interest Rate During Period	1.68%	[2]
Amount Drawn/ Outstanding	0
Subsequent Event [Member] | System Energy VIE [Member] | Five Point Three Three Percent Series G Notes Due April Two Thousand Fifteen [Member]
Debt Instrument [Line Items]
Redemption of debt instrument			$ 60,000,000

[1] The credit facility allows Entergy Arkansas to issue letters of credit against 50% of the borrowing capacity of the facility. As of March 31, 2015, no letters of credit were outstanding.

[2] The interest rate is the rate as of March 31, 2015 that would most likely apply to outstanding borrowings under the facility.

[3] The credit facility allows Entergy Gulf States Louisiana to issue letters of credit against 50% of the borrowing capacity of the facility. As of March 31, 2015, no letters of credit were outstanding.

[4] The credit facility allows Entergy Texas to issue letters of credit against 50% of the borrowing capacity of the facility. As of March 31, 2015, $1.3 million in letters of credit were outstanding.