Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Narrative) (Details) (USD $)	12 Months Ended	1 Months Ended
	Dec. 31, 2014	Jan. 31, 2015
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 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%
Consolidated debt ratio	65.00%
Commercial Paper program limit	1,500,000,000.0
Commercial Paper Amount Outstanding	484,000,000
Consolidated debt ratio of lessees total capitalization	70.00%
Amount Drawn/ Outstanding	695,000,000
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 lessees total capitalization	70.00%
Amount Drawn/ Outstanding	46,000,000
Entergy Mississippi [Member]
Debt Instrument [Line Items]
Consolidated debt ratio	65.00%
Entergy New Orleans [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	1.50%
Consolidated debt ratio	65.00%
Entergy Gulf States Louisiana VIE [Member]
Debt Instrument [Line Items]
Amount Drawn/ Outstanding	0
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%
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.10%
Consolidated debt ratio of lessees total capitalization	70.00%
System Energy [Member]
Debt Instrument [Line Items]
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.125%
Consolidated debt ratio of lessees total capitalization	70.00%
Entergy Arkansas [Member]
Debt Instrument [Line Items]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Consolidated debt ratio	65.00%
Line of credit facility commitment fee as a percentage of undrawn commitment amount	0.125%
Consolidated debt ratio of lessees total capitalization	70.00%
Entergy Texas [Member]
Debt Instrument [Line Items]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Consolidated debt ratio	65.00%
Letters of Credit Outstanding, Amount	1,300,000
Entergy Louisiana [Member]
Debt Instrument [Line Items]
Issuance of letters of credit, percentage of total borrowing capacity	50.00%
Consolidated debt ratio	65.00%
Credit Facility [Member]
Debt Instrument [Line Items]
Debt, weighted average interest rate	1.93%
Commercial Paper Program [Member]
Debt Instrument [Line Items]
Debt, weighted average interest rate	0.88%
Three Point Nine Two Percent Series H Dues February Two Thousand Twenty One [Member] | Entergy Louisiana VIE [Member]
Debt Instrument [Line Items]
Notes payable noncurrent amount	40,000,000
Debt instrument, interest rate, stated percentage	3.92%
Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	0.275%
Minimum [Member]
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage	0.125%
Subsequent Event [Member] | Entergy Nuclear Vermont Yankee [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		60,000,000
Line of credit facility, commitment fee percentage		0.25%
Debt, weighted average interest rate		1.92%
Uncommitted Credit Facility		$ 85,000,000