2.2.0.25falsefalse0508 - Disclosure - Common Stock (Tables)truefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010
USD ($)
USD ($) / shares
$Jan-01-2010_Dec-31-2010http://www.sec.gov/CIK0000092122duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0so_CommonStockTablesAbstractsofalsenadurationCommon stock.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse| 1falsefalsefalse00falsefalsefalsefalsefalse | Otherxbrli:stringItemTypestringCommon stock.falsefalse
3false0so_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyTextBlocksofalsenadurationAssumptions used in the pricing model and the weighted average grant-date fair value of stock options granted.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel| 1falsefalsefalse00<!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" -->
<!-- Begin Block Tagged Note Table: SO-20101231_note8_table1 - so:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyTextBlock-->
<div align="left" style="font-size: 10pt; font-family: 'Times New Roman',Times,serif">
<div align="center">
<table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<tr valign="bottom">
<td width="64%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
</tr>
<tr style="font-size: 10pt" valign="bottom">
<td nowrap="nowrap" align="left"><b>Year Ended December 31</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3"><b>2010</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3">2009</td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3">2008</td>
</tr>
<!-- End Table Head -->
<!-- Begin Table Body -->
<tr style="font-size: 1px">
<td colspan="13" align="left" style="border-top: 1px solid #000000"> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">Expected volatility
</div></td>
<td> </td>
<td nowrap="nowrap" align="right"> </td>
<td align="right"><b>17.4</b></td>
<td nowrap="nowrap"><b>%</b></td>
<td> </td>
<td nowrap="nowrap" align="right"> </td>
<td align="right">15.6</td>
<td nowrap="nowrap">%</td>
<td> </td>
<td nowrap="nowrap" align="right"> </td>
<td align="right">13.1</td>
<td nowrap="nowrap">%</td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Expected term <i>(in years)</i>
</div></td>
<td> </td>
<td> </td>
<td align="right"><b>5.0</b></td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">5.0</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">5.0</td>
<td> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">Interest rate
</div></td>
<td> </td>
<td nowrap="nowrap" align="right"> </td>
<td align="right"><b>2.4</b></td>
<td nowrap="nowrap"><b>%</b></td>
<td> </td>
<td nowrap="nowrap" align="right"> </td>
<td align="right">1.9</td>
<td nowrap="nowrap">%</td>
<td> </td>
<td nowrap="nowrap" align="right"> </td>
<td align="right">2.8</td>
<td nowrap="nowrap">%</td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Dividend yield
</div></td>
<td> </td>
<td nowrap="nowrap" align="right"> </td>
<td align="right"><b>5.6</b></td>
<td nowrap="nowrap"><b>%</b></td>
<td> </td>
<td nowrap="nowrap" align="right"> </td>
<td align="right">5.4</td>
<td nowrap="nowrap">%</td>
<td> </td>
<td nowrap="nowrap" align="right"> </td>
<td align="right">4.5</td>
<td nowrap="nowrap">%</td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">Weighted average grant-date fair value
</div></td>
<td> </td>
<td align="right"><b>$</b></td>
<td align="right"><b>2.23</b></td>
<td> </td>
<td> </td>
<td align="right">$</td>
<td align="right">1.80</td>
<td> </td>
<td> </td>
<td align="right">$</td>
<td align="right">2.37</td>
<td> </td>
</tr>
<!-- End Table Body -->
</table>
</div>
</div>
<!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" -->
<!-- Begin Block Tagged Notefalsefalsefalsefalsefalse | Otherus-types:textBlockItemTypestringAssumptions used in the pricing model and the weighted average grant-date fair value of stock options granted.No authoritative reference available.falsefalse
4false0so_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingTextBlocksofalsenadurationSummary of Company's activity in the stock option plan for the current year.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel| 1falsefalsefalse00<!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" -->
<!-- Begin Block Tagged Note Table: SO-20101231_note8_table2 - so:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingTextBlock-->
<div align="left" style="font-size: 10pt; font-family: 'Times New Roman',Times,serif">
<div align="center">
<table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<tr valign="bottom">
<td width="76%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
</tr>
<tr style="font-size: 10pt" valign="bottom">
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3"><b>Shares Subject</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3"><b>Weighted Average</b></td>
</tr>
<tr style="font-size: 10pt" valign="bottom">
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3"><b>To Option</b></td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="3"><b>Exercise Price</b></td>
</tr>
<!-- End Table Head -->
<!-- Begin Table Body -->
<tr style="font-size: 1px">
<td colspan="9" align="left" style="border-top: 1px solid #000000"> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">Outstanding at December 31, 2009
</div></td>
<td> </td>
<td> </td>
<td align="right">48,247,319</td>
<td> </td>
<td> </td>
<td align="right">$</td>
<td align="right">32.10</td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Granted
</div></td>
<td> </td>
<td> </td>
<td align="right">9,582,288</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">31.22</td>
<td> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">Exercised
</div></td>
<td> </td>
<td nowrap="nowrap" align="right"> </td>
<td align="right">(7,024,176</td>
<td nowrap="nowrap">)</td>
<td> </td>
<td> </td>
<td align="right">28.15</td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Cancelled
</div></td>
<td> </td>
<td nowrap="nowrap" align="right"> </td>
<td align="right">(93,845</td>
<td nowrap="nowrap">)</td>
<td> </td>
<td> </td>
<td align="right">31.02</td>
<td> </td>
</tr>
<tr style="font-size: 1px">
<td colspan="9" align="left" style="border-top: 1px solid #000000"> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px"><b>Outstanding at December 31, 2010</b>
</div></td>
<td> </td>
<td> </td>
<td align="right"><b>50,711,586</b></td>
<td> </td>
<td> </td>
<td align="right"><b>$</b></td>
<td align="right"><b>32.48</b></td>
<td> </td>
</tr>
<tr style="font-size: 1px">
<td colspan="9" align="left" style="border-top: 3px double #000000"> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px"><b>Exercisable at December 31, 2010</b>
</div></td>
<td> </td>
<td> </td>
<td align="right"><b>34,564,434</b></td>
<td> </td>
<td> </td>
<td align="right"><b>$</b></td>
<td align="right"><b>32.81</b></td>
<td> </td>
</tr>
<tr style="font-size: 1px">
<td colspan="9" align="left" style="border-top: 3px double #000000"> </td>
</tr>
<!-- End Table Body -->
</table>
</div>
</div>
<!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" -->
<!-- Begin Block Tagged Notefalsefalsefalsefalsefalse | Otherus-types:textBlockItemTypestringSummary of Company's activity in the stock option plan for the current year.No authoritative reference available.falsefalse
5false0so_EarningPerShareTextBlocksofalsenadurationCalculation of diluted shares used to determined diluted earnings per share.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel| 1falsefalsefalse00<!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" -->
<!-- Begin Block Tagged Note Table: SO-20101231_note8_table3 - so:EarningPerShareTextBlock-->
<div align="left" style="font-size: 10pt; font-family: 'Times New Roman',Times,serif">
<div align="center">
<table style="font-size: 10pt; text-align: left" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<tr valign="bottom">
<td width="64%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
<td width="5%"> </td>
<td width="3%"> </td>
<td width="1%"> </td>
<td width="3%"> </td>
</tr>
<tr style="font-size: 10pt" valign="bottom">
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="11" style="border-bottom: 1px solid #000000"><b>Average Common Stock Shares</b></td>
</tr>
<tr style="font-size: 10pt" valign="bottom">
<td style="border-bottom: 1px solid #000000"> </td>
<td style="border-bottom: 1px solid #000000"> </td>
<td nowrap="nowrap" align="center" colspan="3" style="border-bottom: 1px solid #000000"><b>2010</b></td>
<td style="border-bottom: 1px solid #000000"> </td>
<td nowrap="nowrap" align="center" colspan="3" style="border-bottom: 1px solid #000000">2009</td>
<td style="border-bottom: 1px solid #000000"> </td>
<td nowrap="nowrap" align="center" colspan="3" style="border-bottom: 1px solid #000000">2008</td>
</tr>
<tr style="font-size: 10pt" valign="bottom">
<td> </td>
<td> </td>
<td nowrap="nowrap" align="center" colspan="11"><i style="font-size: 8pt">(in thousands)</i></td>
</tr>
<!-- End Table Head -->
<!-- Begin Table Body -->
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">As reported shares
</div></td>
<td> </td>
<td> </td>
<td align="right"><b>832,189</b></td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">794,795</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">771,039</td>
<td> </td>
</tr>
<tr valign="bottom">
<td>
<div style="margin-left:15px; text-indent:-15px">Effect of options
</div></td>
<td> </td>
<td> </td>
<td align="right"><b>4,792</b></td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">1,620</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">3,809</td>
<td> </td>
</tr>
<tr style="font-size: 1px">
<td colspan="13" align="left" style="border-top: 1px solid #000000"> </td>
</tr>
<tr valign="bottom" style="background: #cceeff">
<td>
<div style="margin-left:15px; text-indent:-15px">Diluted shares
</div></td>
<td> </td>
<td> </td>
<td align="right"><b>836,981</b></td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">796,415</td>
<td> </td>
<td> </td>
<td> </td>
<td align="right">774,848</td>
<td> </td>
</tr>
<tr style="font-size: 1px">
<td colspan="13" align="left" style="border-top: 3px double #000000"> </td>
</tr>
<!-- End Table Body -->
</table>
</div>
</div>
<!--DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" -->
<!-- Begin Block Tagged Notefalsefalsefalsefalsefalse | Otherus-types:textBlockItemTypestringCalculation of diluted shares used to determined diluted earnings per share.No authoritative reference available.falsefalse
14Common Stock (Tables)UnKnownUnKnownUnKnownUnKnownfalsetrue