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Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Book Value And The Fair Value Of Long-Term Debt) (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Short-term Debt [Line Items] |  |  |  |
Long-term Debt, Fair Value | $ 14,811,845 | [1],[2] | $ 13,578,511 | [3],[4]
Long-term Debt, Book Value | 14,296,872 |  | 13,325,930 |
Notes payable to power authority | 35,000 |  | 35,000 |
Entergy Arkansas [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Long-term Debt, Fair Value | 2,726,079 | [1],[2] | 2,498,108 | [3],[4]
Long-term Debt, Book Value | 2,777,649 |  | 2,629,839 |
Long term DOE obligations | 181,000 |  | 181,000 |
Entergy Louisiana [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Long-term Debt, Fair Value | 5,967,996 | [1],[2] | 5,018,786 | [3],[4]
Long-term Debt, Book Value | 5,620,234 |  | 4,836,162 |
Capital Lease Obligations | 56,000 |  | 109,000 |
Entergy Mississippi [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Long-term Debt, Fair Value | 1,100,469 | [1],[2] | 1,087,326 | [3],[4]
Long-term Debt, Book Value | 1,045,430 |  | 1,045,085 |
Entergy New Orleans [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Long-term Debt, Fair Value | 443,145 | [1],[2] | 351,040 | [3],[4]
Long-term Debt, Book Value | 449,892 |  | 342,880 |
Entergy Texas [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Long-term Debt, Fair Value | 1,702,601 | [1],[2] | 1,590,616 | [3],[4]
Long-term Debt, Book Value | 1,552,741 |  | 1,451,967 |
System Energy [Member] |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Long-term Debt, Fair Value | 550,080 | [1],[2] | 552,762 | [3],[4]
Long-term Debt, Book Value | 572,742 |  | 572,667 |
Capital Lease Obligations | $ 34,000 |  | $ 34,000 |
[1] | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements and are based on prices derived from inputs such as benchmark yields and reported trades.
[2] | The values exclude lease obligations of $56 million at Entergy Louisiana and $34 million at System Energy, long-term DOE obligations of $181 million at Entergy Arkansas, and the note payable to NYPA of $35 million at Entergy, and include debt due within one year.
[3] | Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements and are based on prices derived from inputs such as benchmark yields and reported trades.
[4] | The values exclude lease obligations of $109 million at Entergy Louisiana and $34 million at System Energy, long-term DOE obligations of $181 million at Entergy Arkansas, and the note payable to NYPA of $35 million at Entergy, and include debt due within one year.

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 Reference 2: 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 3: 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(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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