2.2.0.7 true Decommissioning Trust Funds (Tables) 0509 - Disclosure - Decommissioning Trust Funds (Tables) true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 Entity Information [Line Items] 2 dei_EntityInformationLineItems dei false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. false 3 Securities held 2 us-gaap_AvailableForSaleSecuritiesTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <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> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Total</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Total</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Gains</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="10">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td align="center"> <div style="margin-left:15px; text-indent:-15px"><b>2010</b> </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Equity Securities </div></td> <td> </td> <td align="left">$</td> <td align="right">1,844</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">313</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">26</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Debt Securities </div></td> <td> </td> <td> </td> <td align="right">1,578</td> <td> </td> <td> </td> <td> </td> <td align="right">110</td> <td> </td> <td> </td> <td> </td> <td align="right">1</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">3,422</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">423</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">27</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> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td align="center"> <div style="margin-left:15px; text-indent:-15px"><b>2009</b> </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Equity Securities </div></td> <td> </td> <td align="left">$</td> <td align="right">1,788</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">311</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">30</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Debt Securities </div></td> <td> </td> <td> </td> <td align="right">1,423</td> <td> </td> <td> </td> <td> </td> <td align="right">63</td> <td> </td> <td> </td> <td> </td> <td align="right">8</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">3,211</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">374</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">38</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>  </table> </div> </div> false false false us-types:textBlockItemType textblock This item represents the entire disclosure related to Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a, b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19, 20, 21 false 4 Available for sale Securities Continuous Unrealized Loss Position Fair Value 2 etr_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueTextBlock etr false na duration Available for sale Securities Continuous Unrealized Loss Position Fair Value text block. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <tr valign="bottom"> <td width="52%"> </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> <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="6" style="border-bottom: 1px solid #000000"><b>Equity Securities</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000"><b>Debt Securities</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="14">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 12 months </div></td> <td> </td> <td align="left">$</td> <td align="right">79</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">130</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">1</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">More than 12 months </div></td> <td> </td> <td> </td> <td align="right">149</td> <td> </td> <td> </td> <td> </td> <td align="right">22</td> <td> </td> <td> </td> <td> </td> <td align="right">4</td> <td> </td> <td> </td> <td> </td> <td align="right">—</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: 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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">228</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">26</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">134</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">1</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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     The fair value and gross unrealized losses of available-for-sale equity and debt securities, summarized by investment type and length of time that the securities have been in a continuous loss position, are as follows as of December 31, 2009: </div> <div align="center"> <table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">  <tr valign="bottom"> <td width="52%"> </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> <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="6" style="border-bottom: 1px solid #000000"><b>Equity Securities</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000"><b>Debt Securities</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="14">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 12 months </div></td> <td> </td> <td align="left">$</td> <td align="right">57</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">1</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">311</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">6</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">More than 12 months </div></td> <td> </td> <td> </td> <td align="right">205</td> <td> </td> <td> </td> <td> </td> <td align="right">29</td> <td> </td> <td> </td> <td> </td> <td align="right">18</td> <td> </td> <td> </td> <td> </td> <td align="right">2</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: 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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">262</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">30</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">329</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">8</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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> </div> false false false us-types:textBlockItemType textblock Available for sale Securities Continuous Unrealized Loss Position Fair Value text block. No authoritative reference available. false 5 Fair value of debt securities by contractual maturities 2 etr_FairValueOfDebtSecuritiesByContractualMaturitiesTextBlock etr false na duration Fair value of debt securities by contractual maturities text block. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <tr valign="bottom"> <td width="76%"> </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> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 1 year </div></td> <td> </td> <td align="left">$</td> <td align="right">38</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">31</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">1 year - 5 years </div></td> <td> </td> <td> </td> <td align="right">548</td> <td> </td> <td> </td> <td> </td> <td align="right">676</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">5 years - 10 years </div></td> <td> </td> <td> </td> <td align="right">562</td> <td> </td> <td> </td> <td> </td> <td align="right">388</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">10 years - 15 years </div></td> <td> </td> <td> </td> <td align="right">152</td> <td> </td> <td> </td> <td> </td> <td align="right">131</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">15 years - 20 years </div></td> <td> </td> <td> </td> <td align="right">54</td> <td> </td> <td> </td> <td> </td> <td align="right">34</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">20 years+ </div></td> <td> </td> <td> </td> <td align="right">224</td> <td> </td> <td> </td> <td> </td> <td align="right">163</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: 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" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">1,578</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">1,423</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> </tr>  </table> </div> </div> false false false us-types:textBlockItemType textblock Fair value of debt securities by contractual maturities text block. No authoritative reference available. false 6 Entergy Arkansa's [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/decommissioningtrustfundsentergycorporationentergyarkansasentergygulfstateslouisianaentergylouisianaandsystemenergytables false 1 false false false false 0 0 false false false false 2 USD true false false false Entergy Arkansa's [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_SubsidiariesMember dei_LegalEntityAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 7 Entity Information [Line Items] 2 dei_EntityInformationLineItems dei false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. false 8 Securities held 2 us-gaap_AvailableForSaleSecuritiesTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <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> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Total</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Total</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Gains</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="10">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td align="center"> <div style="margin-left:15px; text-indent:-15px"><b>2010</b> </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Equity Securities </div></td> <td> </td> <td align="left">$</td> <td align="right">265.3</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">70.0</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">2.5</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Debt Securities </div></td> <td> </td> <td> </td> <td align="right">203.2</td> <td> </td> <td> </td> <td> </td> <td align="right">15.7</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">468.5</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">85.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">2.5</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> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td align="center"> <div style="margin-left:15px; text-indent:-15px"><b>2009</b> </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Equity Securities </div></td> <td> </td> <td align="left">$</td> <td align="right">220.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">60.1</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3.4</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Debt Securities </div></td> <td> </td> <td> </td> <td align="right">219.5</td> <td> </td> <td> </td> <td> </td> <td align="right">10.7</td> <td> </td> <td> </td> <td> </td> <td align="right">1.7</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">440.2</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">70.8</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">5.1</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>  </table> </div> </div> false false false us-types:textBlockItemType textblock This item represents the entire disclosure related to Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a, b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19, 20, 21 false 9 Available for sale Securities Continuous Unrealized Loss Position Fair Value 2 etr_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueTextBlock etr false na duration Available for sale Securities Continuous Unrealized Loss Position Fair Value text block. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <tr valign="bottom"> <td width="52%"> </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> <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="6" style="border-bottom: 1px solid #000000"><b>Equity Securities</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000"><b>Debt Securities</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="14">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 12 months </div></td> <td> </td> <td align="left">$</td> <td align="right">4.4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.1</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">12.0</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">More than 12 months </div></td> <td> </td> <td> </td> <td align="right">18.6</td> <td> </td> <td> </td> <td> </td> <td align="right">2.4</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">—</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: 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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">23.0</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">2.5</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">12.0</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">—</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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     The fair value and gross unrealized losses of available-for-sale equity and debt securities, summarized by investment type and length of time that the securities have been in a continuous loss position, are as follows as of December 31, 2009: </div> <div align="center"> <table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">  <tr valign="bottom"> <td width="52%"> </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> <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="6" style="border-bottom: 1px solid #000000"><b>Equity Securities</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000"><b>Debt Securities</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="14">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 12 months </div></td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">31.9</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">1.2</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">More than 12 months </div></td> <td> </td> <td> </td> <td align="right">26.8</td> <td> </td> <td> </td> <td> </td> <td align="right">3.4</td> <td> </td> <td> </td> <td> </td> <td align="right">3.9</td> <td> </td> <td> </td> <td> </td> <td align="right">0.5</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: 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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">26.8</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3.4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">35.8</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">1.7</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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> </div> false false false us-types:textBlockItemType textblock Available for sale Securities Continuous Unrealized Loss Position Fair Value text block. No authoritative reference available. false 10 Fair value of debt securities by contractual maturities 2 etr_FairValueOfDebtSecuritiesByContractualMaturitiesTextBlock etr false na duration Fair value of debt securities by contractual maturities text block. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <tr valign="bottom"> <td width="76%"> </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> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 1 year </div></td> <td> </td> <td align="left">$</td> <td align="right">3.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">6.7</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">1 year - 5 years </div></td> <td> </td> <td> </td> <td align="right">82.1</td> <td> </td> <td> </td> <td> </td> <td align="right">133.2</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">5 years - 10 years </div></td> <td> </td> <td> </td> <td align="right">109.5</td> <td> </td> <td> </td> <td> </td> <td align="right">68.2</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">10 years - 15 years </div></td> <td> </td> <td> </td> <td align="right">2.6</td> <td> </td> <td> </td> <td> </td> <td align="right">5.1</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">15 years - 20 years </div></td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">20 years+ </div></td> <td> </td> <td> </td> <td align="right">5.3</td> <td> </td> <td> </td> <td> </td> <td align="right">6.3</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: 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" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">203.2</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">219.5</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> </tr>  </table> </div> </div> false false false us-types:textBlockItemType textblock Fair value of debt securities by contractual maturities text block. No authoritative reference available. false 11 Entergy Gulf States Louisiana [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/decommissioningtrustfundsentergycorporationentergyarkansasentergygulfstateslouisianaentergylouisianaandsystemenergytables false 1 false false false false 0 0 false false false false 3 USD true false false false Entergy Gulf States Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ na No definition available. No authoritative reference available. false 12 Entity Information [Line Items] 2 dei_EntityInformationLineItems dei false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. false 13 Securities held 2 us-gaap_AvailableForSaleSecuritiesTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <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> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Total</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Total</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Gains</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td align="center" colspan="10">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom" style="background: #cceeff"> <td align="center"> <div style="margin-left:15px; text-indent:-15px"><b>2010</b> </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Equity Securities </div></td> <td> </td> <td align="left">$</td> <td align="right">210.4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">22.4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">4.0</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Debt Securities </div></td> <td> </td> <td> </td> <td align="right">162.0</td> <td> </td> <td> </td> <td> </td> <td align="right">15.5</td> <td> </td> <td> </td> <td> </td> <td align="right">0.1</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">372.4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">37.9</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">4.1</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> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td align="center"> <div style="margin-left:15px; text-indent:-15px"><b>2009</b> </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Equity Securities </div></td> <td> </td> <td align="left">$</td> <td align="right">182.2</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">17.0</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">5.3</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Debt Securities </div></td> <td> </td> <td> </td> <td align="right">167.3</td> <td> </td> <td> </td> <td> </td> <td align="right">10.0</td> <td> </td> <td> </td> <td> </td> <td align="right">0.9</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">349.5</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">27.0</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">6.2</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>  </table> </div> </div> false false false us-types:textBlockItemType textblock This item represents the entire disclosure related to Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a, b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19, 20, 21 false 14 Available for sale Securities Continuous Unrealized Loss Position Fair Value 2 etr_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueTextBlock etr false na duration Available for sale Securities Continuous Unrealized Loss Position Fair Value text block. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <tr valign="bottom"> <td width="52%"> </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> <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="6" style="border-bottom: 1px solid #000000"><b>Equity Securities</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000"><b>Debt Securities</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="14">(In Millions)</td> <td> </td> </tr>   <tr> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 12 months </div></td> <td> </td> <td align="left">$</td> <td align="right">9.6</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.1</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">1.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">More than 12 months </div></td> <td> </td> <td> </td> <td align="right">28.9</td> <td> </td> <td> </td> <td> </td> <td align="right">3.9</td> <td> </td> <td> </td> <td> </td> <td align="right">1.1</td> <td> </td> <td> </td> <td> </td> <td align="right">0.1</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: 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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">38.5</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">4.0</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">2.8</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.1</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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     The fair value and gross unrealized losses of available-for-sale equity and debt securities, summarized by investment type and length of time that the securities have been in a continuous loss position, are as follows as of December 31, 2009: </div> <div align="center"> <table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">  <tr valign="bottom"> <td width="52%"> </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> <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="6" style="border-bottom: 1px solid #000000"><b>Equity Securities</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000"><b>Debt Securities</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="14">(In Millions)</td> <td> </td> </tr>   <tr> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 12 months </div></td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">24.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.6</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">More than 12 months </div></td> <td> </td> <td> </td> <td align="right">48.9</td> <td> </td> <td> </td> <td> </td> <td align="right">5.3</td> <td> </td> <td> </td> <td> </td> <td align="right">4.3</td> <td> </td> <td> </td> <td> </td> <td align="right">0.3</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: 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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">48.9</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">5.3</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">29.0</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.9</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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> </div> false false false us-types:textBlockItemType textblock Available for sale Securities Continuous Unrealized Loss Position Fair Value text block. No authoritative reference available. false 15 Fair value of debt securities by contractual maturities 2 etr_FairValueOfDebtSecuritiesByContractualMaturitiesTextBlock etr false na duration Fair value of debt securities by contractual maturities text block. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <tr valign="bottom"> <td width="76%"> </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> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6">(In Millions)</td> <td> </td> </tr>   <tr> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 1 year </div></td> <td> </td> <td align="left">$</td> <td align="right">5.4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">3.3</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">1 year - 5 years </div></td> <td> </td> <td> </td> <td align="right">35.4</td> <td> </td> <td> </td> <td> </td> <td align="right">46.1</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">5 years - 10 years </div></td> <td> </td> <td> </td> <td align="right">57.7</td> <td> </td> <td> </td> <td> </td> <td align="right">53.9</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">10 years - 15 years </div></td> <td> </td> <td> </td> <td align="right">47.8</td> <td> </td> <td> </td> <td> </td> <td align="right">52.0</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">15 years - 20 years </div></td> <td> </td> <td> </td> <td align="right">4.7</td> <td> </td> <td> </td> <td> </td> <td align="right">3.5</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">20 years+ </div></td> <td> </td> <td> </td> <td align="right">11.0</td> <td> </td> <td> </td> <td> </td> <td align="right">8.5</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: 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" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">162.0</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">167.3</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> </tr>  </table> </div> </div> false false false us-types:textBlockItemType textblock Fair value of debt securities by contractual maturities text block. No authoritative reference available. false 16 Entergy Louisiana [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/decommissioningtrustfundsentergycorporationentergyarkansasentergygulfstateslouisianaentergylouisianaandsystemenergytables false 1 false false false false 0 0 false false false false 4 USD true false false false Entergy Louisiana [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiaryTwoMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ na No definition available. No authoritative reference available. false 17 Entity Information [Line Items] 2 dei_EntityInformationLineItems dei false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. false 18 Securities held 2 us-gaap_AvailableForSaleSecuritiesTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <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> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Total</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Total</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Gains</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td align="center" colspan="10">(In Millions)</td> <td> </td> </tr>   <tr> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td align="center"> <div style="margin-left:15px; text-indent:-15px"><b>2010</b> </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Equity Securities </div></td> <td> </td> <td align="left">$</td> <td align="right">130.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">19.4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">4.2</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Debt Securities </div></td> <td> </td> <td> </td> <td align="right">95.6</td> <td> </td> <td> </td> <td> </td> <td align="right">8.3</td> <td> </td> <td> </td> <td> </td> <td align="right">—</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">226.3</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">27.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">4.2</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> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td align="center"> <div style="margin-left:15px; text-indent:-15px"><b>2009</b> </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Equity Securities </div></td> <td> </td> <td align="left">$</td> <td align="right">117.9</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">15.3</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">5.3</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Debt Securities </div></td> <td> </td> <td> </td> <td align="right">91.2</td> <td> </td> <td> </td> <td> </td> <td align="right">3.9</td> <td> </td> <td> </td> <td> </td> <td align="right">0.9</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">209.1</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">19.2</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">6.2</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>  </table> </div> </div> false false false us-types:textBlockItemType textblock This item represents the entire disclosure related to Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a, b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19, 20, 21 false 19 Available for sale Securities Continuous Unrealized Loss Position Fair Value 2 etr_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueTextBlock etr false na duration Available for sale Securities Continuous Unrealized Loss Position Fair Value text block. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <tr valign="bottom"> <td width="52%"> </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> <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="6" style="border-bottom: 1px solid #000000"><b>Equity Securities</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000"><b>Debt Securities</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6">(In Millions)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr>   <tr> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 12 months </div></td> <td> </td> <td align="left">$</td> <td align="right">9.1</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.1</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">More than 12 months </div></td> <td> </td> <td> </td> <td align="right">26.3</td> <td> </td> <td> </td> <td> </td> <td align="right">4.1</td> <td> </td> <td> </td> <td> </td> <td align="right">0.2</td> <td> </td> <td> </td> <td> </td> <td align="right">—</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: 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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">35.4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">4.2</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.9</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">—</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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     The fair value and gross unrealized losses of available-for-sale equity and debt securities, summarized by investment type and length of time that the securities have been in a continuous loss position, are as follows as of December 31, 2009: </div> <div align="center"> <table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">  <tr valign="bottom"> <td width="52%"> </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> <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="6" style="border-bottom: 1px solid #000000"><b>Equity Securities</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000"><b>Debt Securities</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6">(In Millions)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr>   <tr> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 12 months </div></td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">29.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.8</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">More than 12 months </div></td> <td> </td> <td> </td> <td align="right">37.5</td> <td> </td> <td> </td> <td> </td> <td align="right">5.3</td> <td> </td> <td> </td> <td> </td> <td align="right">0.9</td> <td> </td> <td> </td> <td> </td> <td align="right">0.1</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: 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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">37.5</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">5.3</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">30.6</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.9</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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> </div> false false false us-types:textBlockItemType textblock Available for sale Securities Continuous Unrealized Loss Position Fair Value text block. No authoritative reference available. false 20 Fair value of debt securities by contractual maturities 2 etr_FairValueOfDebtSecuritiesByContractualMaturitiesTextBlock etr false na duration Fair value of debt securities by contractual maturities text block. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <tr valign="bottom"> <td width="76%"> </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> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6">(In Millions)</td> <td> </td> </tr>   <tr> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 1 year </div></td> <td> </td> <td align="left">$</td> <td align="right">4.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">2.2</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">1 year - 5 years </div></td> <td> </td> <td> </td> <td align="right">28.4</td> <td> </td> <td> </td> <td> </td> <td align="right">31.9</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">5 years - 10 years </div></td> <td> </td> <td> </td> <td align="right">25.6</td> <td> </td> <td> </td> <td> </td> <td align="right">23.7</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">10 years - 15 years </div></td> <td> </td> <td> </td> <td align="right">14.0</td> <td> </td> <td> </td> <td> </td> <td align="right">12.1</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">15 years - 20 years </div></td> <td> </td> <td> </td> <td align="right">5.9</td> <td> </td> <td> </td> <td> </td> <td align="right">5.5</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">20 years+ </div></td> <td> </td> <td> </td> <td align="right">17.0</td> <td> </td> <td> </td> <td> </td> <td align="right">15.8</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: 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" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">95.6</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">91.2</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> </tr>  </table> </div> </div> false false false us-types:textBlockItemType textblock Fair value of debt securities by contractual maturities text block. No authoritative reference available. false 21 System Energy [Member] 0 na true na na No definition available. false true false false false false false false false false false http://entergy.com/role/decommissioningtrustfundsentergycorporationentergyarkansasentergygulfstateslouisianaentergylouisianaandsystemenergytables false 1 false false false false 0 0 false false false false 5 USD true false false false System Energy [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi etr_RegistrantSubsidiarySixMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 22 Entity Information [Line Items] 2 dei_EntityInformationLineItems dei false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. false 23 Securities held 2 us-gaap_AvailableForSaleSecuritiesTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <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> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Total</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Total</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Gains</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="10">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom" style="background: #cceeff"> <td align="center"> <div style="margin-left:45px; text-indent:-15px"><b>2010</b> </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Equity Securities </div></td> <td> </td> <td align="left">$</td> <td align="right">200.5</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">22.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">12.4</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Debt Securities </div></td> <td> </td> <td> </td> <td align="right">163.6</td> <td> </td> <td> </td> <td> </td> <td align="right">7.8</td> <td> </td> <td> </td> <td> </td> <td align="right">0.1</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">364.1</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">30.5</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">12.5</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> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td align="center"> <div style="margin-left:45px; text-indent:-15px"><b>2009</b> </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">Equity Securities </div></td> <td> </td> <td align="left">$</td> <td align="right">182.3</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">17.8</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">14.7</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Debt Securities </div></td> <td> </td> <td> </td> <td align="right">144.7</td> <td> </td> <td> </td> <td> </td> <td align="right">2.8</td> <td> </td> <td> </td> <td> </td> <td align="right">0.8</td> <td> </td> </tr> <tr style="font-size: 1px"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">327.0</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">20.6</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">15.5</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>  </table> </div> </div> false false false us-types:textBlockItemType textblock This item represents the entire disclosure related to Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a, b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a, b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19, 20, 21 false 24 Available for sale Securities Continuous Unrealized Loss Position Fair Value 2 etr_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueTextBlock etr false na duration Available for sale Securities Continuous Unrealized Loss Position Fair Value text block. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <tr valign="bottom"> <td width="52%"> </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> <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="6" style="border-bottom: 1px solid #000000"><b>Equity Securities</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000"><b>Debt Securities</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="14">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 12 months </div></td> <td> </td> <td align="left">$</td> <td align="right">11.0</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.2</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">13.6</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.1</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">More than 12 months </div></td> <td> </td> <td> </td> <td align="right">74.5</td> <td> </td> <td> </td> <td> </td> <td align="right">12.2</td> <td> </td> <td> </td> <td> </td> <td align="right">0.1</td> <td> </td> <td> </td> <td> </td> <td align="right">—</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: 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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">85.5</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">12.4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">13.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.1</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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">     The fair value and gross unrealized losses of available-for-sale equity and debt securities, summarized by investment type and length of time that the securities have been in a continuous loss position, are as follows as of December 31, 2009: </div> <div align="center"> <table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">  <tr valign="bottom"> <td width="52%"> </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> <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="6" style="border-bottom: 1px solid #000000"><b>Equity Securities</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6" style="border-bottom: 1px solid #000000"><b>Debt Securities</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Gross</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Fair</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2"><b>Unrealized</b></td> <td> </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>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Value</b></td> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="2" style="border-bottom: 1px solid #000000"><b>Losses</b></td> <td> </td> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="14">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 12 months </div></td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">—</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">56.4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.6</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">More than 12 months </div></td> <td> </td> <td> </td> <td align="right">89.3</td> <td> </td> <td> </td> <td> </td> <td align="right">14.7</td> <td> </td> <td> </td> <td> </td> <td align="right">3.2</td> <td> </td> <td> </td> <td> </td> <td align="right">0.2</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: 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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 1px solid #000000"> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">89.3</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">14.7</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">59.6</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">0.8</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> <td> </td> <td nowrap="nowrap" colspan="2" align="right" style="border-top: 3px double #000000"> </td> <td> </td> </tr>  </table> </div> </div> false false false us-types:textBlockItemType textblock Available for sale Securities Continuous Unrealized Loss Position Fair Value text block. No authoritative reference available. false 25 Fair value of debt securities by contractual maturities 2 etr_FairValueOfDebtSecuritiesByContractualMaturitiesTextBlock etr false na duration Fair value of debt securities by contractual maturities text block. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <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%">  <tr valign="bottom"> <td width="76%"> </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> </tr> <tr style="font-size: 8pt" valign="bottom"> <td> </td> <td> </td> <td nowrap="nowrap" align="center" colspan="6">(In Millions)</td> <td> </td> </tr>   <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">  </div></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">Less than 1 year </div></td> <td> </td> <td align="left">$</td> <td align="right">1.4</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">1.0</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">1 year - 5 years </div></td> <td> </td> <td> </td> <td align="right">82.6</td> <td> </td> <td> </td> <td> </td> <td align="right">84.0</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">5 years - 10 years </div></td> <td> </td> <td> </td> <td align="right">51.6</td> <td> </td> <td> </td> <td> </td> <td align="right">36.2</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">10 years - 15 years </div></td> <td> </td> <td> </td> <td align="right">3.7</td> <td> </td> <td> </td> <td> </td> <td align="right">4.2</td> <td> </td> </tr> <tr valign="bottom" style="background: #cceeff"> <td> <div style="margin-left:15px; text-indent:-15px">15 years - 20 years </div></td> <td> </td> <td> </td> <td align="right">1.2</td> <td> </td> <td> </td> <td> </td> <td align="right">2.3</td> <td> </td> </tr> <tr valign="bottom"> <td> <div style="margin-left:15px; text-indent:-15px">20 years+ </div></td> <td> </td> <td> </td> <td align="right">23.1</td> <td> </td> <td> </td> <td> </td> <td align="right">17.0</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: 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" style="background: #cceeff"> <td> <div style="margin-left:30px; text-indent:-15px"><b>Total</b> </div></td> <td> </td> <td align="left">$</td> <td align="right">163.6</td> <td> </td> <td> </td> <td align="left">$</td> <td align="right">144.7</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> </tr>  </table> </div> </div> false false false us-types:textBlockItemType textblock Fair value of debt securities by contractual maturities text block. No authoritative reference available. false 1 24 false UnKnown UnKnown UnKnown false true