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Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Narrative) (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Apr. 30, 2016 | Mar. 31, 2016 | Jan. 31, 2016 | Mar. 31, 2016
Debt Instrument [Line Items] |  |  |  |  |
Amount of Facility |  |  | $ 3,500,000 |  | $ 3,500,000
Issuance of letters of credit, percentage of total borrowing capacity |  |  | 50.00% |  | 50.00%
Letters of Credit Outstanding, Amount |  |  | $ 400 |  | $ 400
Line of credit facility, commitment fee percentage |  |  |  |  | 0.275%
Amount Drawn/ Outstanding |  |  | 616,000 |  | $ 616,000
Commercial Paper program limit |  |  | 1,500,000 |  | 1,500,000
Commercial Paper Amount Outstanding |  |  | $ 578,000 |  | $ 578,000
Commercial Paper Program [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt, weighted average interest rate |  |  | 1.14% |  | 1.14%
Credit Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt, weighted average interest rate |  |  | 2.35% |  | 2.35%
Entergy Arkansas [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Authorized Short Term Borrowings |  |  | $ 250,000 |  | $ 250,000
Issuance of letters of credit, percentage of total borrowing capacity |  |  | 50.00% |  | 50.00%
Consolidated debt ratio |  |  | 65.00% |  | 65.00%
Entergy Arkansas [Member] | Three Point Five Percent Series First Mortgage Bonds Due April Two Thousand Twenty Six [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  |  | 3.50% |
Issuance Of Debt |  |  |  | $ 325,000 |
Entergy Arkansas [Member] | Mortgage Bonds Five Point Sixty Six Percent Series due February Two Thousand Twenty Five [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  |  | 5.66% |
Redemption of debt instrument |  |  |  | $ 175,000 |
Entergy Louisiana [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Authorized Short Term Borrowings |  |  | $ 450,000 |  | $ 450,000
Issuance of letters of credit, percentage of total borrowing capacity |  |  | 50.00% |  | 50.00%
Consolidated debt ratio |  |  | 65.00% |  | 65.00%
Cash payment representing the purchase price to acquire the undivided interests in Waterford 3 |  |  | $ 60,000 |  |
Entergy Louisiana [Member] | Mortgage Bonds, Four Point Ninety Five Percent Series, Due January Two Thousand Forty Five [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 4.95% |  | 4.95%
Issuance Of Debt |  |  | $ 200,000 |  |
Entergy Louisiana [Member] | Mortgage Bonds, Three Point Two Five Percent Series, Due April Twenty Twenty Eight [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 3.25% |  | 3.25%
Issuance Of Debt |  |  | $ 425,000 |  |
Entergy Louisiana [Member] | Mortgage Notes, Waterford 3 Series [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Issuance Of Debt |  |  | $ 51,972 |  |
Entergy Louisiana [Member] | Governmental Bonds, Three Point Three Seven Five Percent, Due September Twenty Twenty Eight [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 3.375% |  | 3.375%
Issuance Of Debt |  |  | $ 83,680 |  |
Entergy Louisiana [Member] | Governmental Bonds, Three Point Five Zero Percent, Due June Twenty Thirty [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 3.50% |  | 3.50%
Issuance Of Debt |  |  | $ 115,000 |  |
Entergy Mississippi [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Letters of credit posted to cover derivative exposure |  |  | 400 |  | $ 400
Authorized Short Term Borrowings |  |  | 175,000 |  | 175,000
Letters of Credit Outstanding, Amount |  |  | $ 400 |  | $ 400
Consolidated debt ratio |  |  | 65.00% |  | 65.00%
Entergy Texas [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Authorized Short Term Borrowings |  |  | $ 200,000 |  | $ 200,000
Issuance of letters of credit, percentage of total borrowing capacity |  |  | 50.00% |  | 50.00%
Consolidated debt ratio |  |  | 65.00% |  | 65.00%
Entergy Texas [Member] | Mortgage Bonds, Two Point Five Five Series, Due June Twenty Twenty One [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 2.55% |  | 2.55%
Issuance Of Debt |  |  | $ 125,000 |  |
System Energy [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Authorized Short Term Borrowings |  |  | 200,000 |  | $ 200,000
Entergy Nuclear Vermont Yankee [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount of Facility |  |  | 100,000 |  | $ 100,000
Line of credit facility, commitment fee percentage |  |  |  |  | 0.25%
Amount Drawn/ Outstanding |  |  | 61,000 |  | $ 61,000
Line of Credit Facility, Interest Rate During Period |  |  |  |  | 2.20%
Uncommitted Credit Facility |  |  | 85,000 |  | $ 85,000
Uncommitted Line of Credit Facility Interest Rate During Period |  |  |  |  | 2.18%
Entergy New Orleans [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Authorized Short Term Borrowings |  |  | $ 100,000 |  | $ 100,000
Consolidated debt ratio |  |  | 65.00% |  | 65.00%
Entergy New Orleans [Member] | Mortgage Bonds, Five Point Five Zero Percent Series, Due April Twenty Sixty Six [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 5.50% |  | 5.50%
Issuance Of Debt |  |  | $ 110,000 |  |
System Energy VIE [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount Drawn/ Outstanding |  |  | $ 111,000 |  | $ 111,000
Line of credit facility commitment fee as a percentage of undrawn commitment amount |  |  |  |  | 0.125%
Consolidated debt ratio of total capitalization |  |  |  |  | 70.00%
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% |  | 3.78%
Entergy Arkansas VIE [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount Drawn/ Outstanding |  |  | $ 0 |  | $ 0
Line of credit facility commitment fee as a percentage of undrawn commitment amount |  |  |  |  | 0.125%
Consolidated debt ratio of total capitalization |  |  |  |  | 70.00%
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% |  | 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%
Entergy Louisiana VIE [Member] | Variable Interest Entity Notes Payable Three Point Three Zero Percent Series F Due March Two Thousand Sixteen [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 3.30% |  | 3.30%
Redemption of debt instrument |  |  | $ 20,000 |  |
Entergy Louisiana Waterford VIE [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount Drawn/ Outstanding |  |  | $ 77,500 |  | $ 77,500
Entergy Louisiana Waterford 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% |  | 3.92%
Entergy Louisiana River Bend VIE [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount Drawn/ Outstanding |  |  | $ 0 |  | $ 0
Maximum [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, commitment fee percentage |  |  |  |  | 0.275%
Consolidated debt ratio |  |  | 65.00% |  | 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 | [1] |  | $ 150,000 |  | $ 150,000
Letters of Credit Outstanding, Amount |  |  | 0 |  | 0
Amount Drawn/ Outstanding |  |  | 0 |  | $ 0
Line of Credit Facility, Interest Rate During Period | [2] |  |  |  | 1.68%
Credit Facility Of One Hundred And Fifty Million [Member] | Entergy Texas [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amount of Facility | [3] |  | 150,000 |  | $ 150,000
Letters of Credit Outstanding, Amount |  |  | 1,300 |  | 1,300
Amount Drawn/ Outstanding |  |  | $ 0 |  | $ 0
Line of Credit Facility, Interest Rate During Period | [2] |  |  |  | 1.93%
Subsequent Event [Member] | Entergy Louisiana [Member] | Pollution Control Revenue Bonds [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Redemption of debt instrument |  | $ 198,680 |  |  |
[1] | The credit facility allows Entergy Arkansas to issue letters of credit against 50% of the borrowing capacity of the facility.
[2] | The interest rate is the rate as of March 31, 2016 that would most likely apply to outstanding borrowings under the facility.
[3] | The credit facility allows Entergy Texas to issue letters of credit against 50% of the borrowing capacity of the facility.

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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