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Income Taxes Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Regulatory Liability, Noncurrent | $ 1,433,632 | $ 1,414,898
Entergy Arkansas [Member] |  |
Regulatory Liability, Noncurrent | 257,879 | 242,913
Entergy Louisiana [Member] |  |
Regulatory Liability, Noncurrent | 817,625 | 818,623
System Energy [Member] |  |
Regulatory Liability, Noncurrent | $ 344,950 | $ 337,424

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- Definition The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. + 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 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | instant

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- Details
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- Details
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |