2.2.0.25falsefalse0514 - Disclosure - Equity Method Investments [Tables]truefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010
USD ($)
USD ($) / shares
$Jan-01-2010_Dec-31-2010http://www.sec.gov/CIK0000065984duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0etr_EquityMethodInvestmentsTablesAbstractetrfalsenadurationEquity method investments.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse| 1falsefalsefalse00falsefalsefalsefalsefalse | Otherxbrli:stringItemTypestringEquity method investments.falsefalse
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<!-- Begin Block Tagged Note Table: ETR-20101231_note14_table1 - us-gaap:EquityMethodInvestmentsTextBlock-->
<div align="left" style="font-size: 10pt; font-family: 'Times New Roman',Times,serif">
<div align="center">
<table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<tr valign="bottom">
<td width="15%"> </td>
<td width="1%"> </td>
<td width="23%"> </td>
<td width="1%"> </td>
<td width="60%"> </td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td nowrap="nowrap" align="left" style="border-bottom: 1px solid #000000"><b>Investment</b></td>
<td> </td>
<td nowrap="nowrap" align="center" style="border-bottom: 1px solid #000000"><b>Ownership</b></td>
<td> </td>
<td nowrap="nowrap" align="center" style="border-bottom: 1px solid #000000"><b>Description</b></td>
</tr>
<!-- End Table Head -->
<!-- Begin Table Body -->
<tr valign="bottom">
<td valign="top">
<div style="margin-left:0px; text-indent:-0px">Entergy-Koch
</div></td>
<td> </td>
<td align="left" valign="top">50% partnership interest
</td>
<td> </td>
<td align="left" valign="top">Entergy-Koch was in the energy commodity
marketing and trading business and gas
transportation and storage business until the
fourth quarter 2004 when these businesses were
sold. In December 2009, Entergy reorganized
its investment in Entergy-Koch, received a
$25.6 million cash distribution, and received
a distribution of certain software owned by
the joint venture.</td>
</tr>
<tr valign="bottom"><!-- Blank Space -->
<td valign="top">
<div style="margin-left:0px; text-indent:-0px"> 
</div></td>
<td> </td>
<td align="left" valign="top"> </td>
<td> </td>
<td align="left" valign="top"> </td>
</tr>
<tr valign="bottom">
<td valign="top">
<div style="margin-left:0px; text-indent:-0px">RS Cogen LLC
</div></td>
<td> </td>
<td align="left" valign="top">50% member interest
</td>
<td> </td>
<td align="left" valign="top">Co-generation project that produces power and
steam on an industrial and merchant basis in
the Lake Charles, Louisiana area.</td>
</tr>
<tr valign="bottom"><!-- Blank Space -->
<td valign="top">
<div style="margin-left:0px; text-indent:-0px"> 
</div></td>
<td> </td>
<td align="left" valign="top"> </td>
<td> </td>
<td align="left" valign="top"> </td>
</tr>
<tr valign="bottom">
<td valign="top">
<div style="margin-left:0px; text-indent:-0px">Top Deer
</div></td>
<td> </td>
<td align="left" valign="top">50% member interest
</td>
<td> </td>
<td align="left" valign="top">Wind-powered electric generation joint venture.</td>
</tr>
<!-- End Table Body -->
</table>
</div>
</div>
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<!-- Begin Block Tagged Notefalsefalsefalsefalsefalse | Otherus-types:textBlockItemTypestringThis item represents disclosure of information related to equity method investments in common stock. The information which should be considered for disclosure includes: (a) the name of each investee or group of investments for which combined disclosure is appropriate, (2) the percentage ownership of common stock, (3) the difference, if any, between the carrying amount of an investment and the value of the underlying equity in the net assets and the accounting treatment of difference, if any, and (4) the aggregate value of each identified investment based on its quoted market price, if available.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 20
-Subparagraph a, b
falsefalse
4false0etr_EquityMethodInvestmentsReconciliationTextBlocketrfalsenadurationEquity Method Investments Reconciliation.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel| 1falsefalsefalse00<!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" -->
<!-- Begin Block Tagged Note Table: ETR-20101231_note14_table2 - etr:EquityMethodInvestmentsReconciliationTextBlock-->
<div align="left" style="font-size: 10pt; font-family: 'Times New Roman',Times,serif">
<div align="center">
<table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<tr valign="bottom">
<td width="64%"> </td>
<td width="5%"> </td>
<td width="1%"> </td>
<td width="5%"> </td>
<td width="1%"> </td>
<td width="5%"> </td>
<td width="1%"> </td>
<td width="5%"> </td>
<td width="1%"> </td>
<td width="5%"> </td>
<td width="1%"> </td>
<td width="5%"> </td>
<td width="1%"> </td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>2010</b></td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>2009</b></td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>2008</b></td>
<td> </td>
</tr>
<tr style="font-size: 8pt" valign="bottom">
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="10">(In Thousands)</td>
<td> </td>
</tr>
<!-- End Table Head -->
<!-- Begin Table Body -->
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">Beginning of year
</div></td>
<td> </td>
<td align="left">$</td>
<td align="right">39,580</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">66,247</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">78,992</td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Loss from the investments
</div></td>
<td> </td>
<td nowrap="nowrap" align="left"> </td>
<td align="right">(2,469</td>
<td nowrap="nowrap">)</td>
<td> </td>
<td nowrap="nowrap" align="left"> </td>
<td align="right">(7,793</td>
<td nowrap="nowrap">)</td>
<td> </td>
<td nowrap="nowrap" align="left"> </td>
<td align="right">(11,684</td>
<td nowrap="nowrap">)</td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">Dispositions and other adjustments
</div></td>
<td> </td>
<td> </td>
<td align="right">3,586</td>
<td> </td>
<td> </td>
<td nowrap="nowrap" align="left"> </td>
<td align="right">(18,874</td>
<td nowrap="nowrap">)</td>
<td> </td>
<td nowrap="nowrap" align="left"> </td>
<td align="right">(1,061</td>
<td nowrap="nowrap">)</td>
</tr>
<tr style="font-size: 1px">
<td>
<div style="margin-left:15px; text-indent:-15px"> 
</div></td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">End of year
</div></td>
<td> </td>
<td align="left">$</td>
<td align="right">40,697</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">39,580</td>
<td> </td>
<td> </td>
<td align="left">$</td>
<td align="right">66,247</td>
<td> </td>
</tr>
<tr style="font-size: 1px">
<td>
<div style="margin-left:15px; text-indent:-15px"> 
</div></td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td>
<td> </td>
<td> </td>
<td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td>
<td> </td>
</tr>
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</table>
</div>
</div>
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