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| <NonNumbericText> <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Note 11. Income per Share</font></div><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Basic income per share is based on the weighted average number of common shares outstanding during the period. Diluted income per share includes additional common shares that would have been outstanding if potential common shares with a dilutive effect had been issued.</font></div><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"> A reconciliation of the number of shares used for the basic and diluted income per share calculations is as follows:</font></div><div style="DISPLAY: block; TEXT-INDENT: 0pt"><br /> </div><div align="center"><table style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman" cellspacing="0" cellpadding="0" width="65%"><tr><td style="BORDER-BOTTOM: black 2px solid" valign="bottom" align="left" width="40%"><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: times new roman">Millions of shares</font></div></td><td style="BORDER-BOTTOM: black 2px solid" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid" valign="bottom" width="6%" colspan="2"><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">2010</font></div></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid" valign="bottom" width="6%" colspan="2"><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">2009</font></div></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid" valign="bottom" width="6%" colspan="2"><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">2008</font></div></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td></tr><tr bgcolor="#cceeff"><td valign="bottom" align="left" width="40%"><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Basic weighted average common shares outstanding</font></div></td><td valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> 908</font></td><td style="TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> 900</font></td><td style="TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> 883</font></td><td style="TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td></tr><tr bgcolor="white"><td valign="bottom" align="left" width="40%"><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Dilutive effect of:</font></div></td><td valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: right" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: right" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: right" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td></tr><tr bgcolor="#cceeff"><td valign="bottom" align="left" width="40%"><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="MARGIN-LEFT: 16.05pt"></font>Convertible senior notes premium (a)</font></div></td><td valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> –</font></td><td style="TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> –</font></td><td style="TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> 22</font></td><td style="TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td></tr><tr bgcolor="white"><td style="BORDER-BOTTOM: black 2px solid" valign="bottom" align="left" width="40%"><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="MARGIN-LEFT: 16.05pt"></font>Stock options</font></div></td><td style="BORDER-BOTTOM: black 2px solid" valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> 3</font></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid" valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> 2</font></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid" valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> 4</font></td><td style="BORDER-BOTTOM: black 2px solid; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td></tr><tr bgcolor="#cceeff"><td style="BORDER-BOTTOM: black 4px double" valign="bottom" align="left" width="40%"><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Diluted weighted average common shares outstanding</font></div></td><td style="BORDER-BOTTOM: black 4px double" valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> 911</font></td><td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 4px double" valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> 902</font></td><td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 4px double" valign="bottom" align="left" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td><td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> 909</font></td><td style="BORDER-BOTTOM: black 4px double; TEXT-ALIGN: left" valign="bottom" nowrap="nowrap" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> </font></td></tr></table></div><div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="LETTER-SPACING: 9pt"> </font><font style="LETTER-SPACING: 9pt"> </font><font style="LETTER-SPACING: 9pt"> </font> (a) 3.125% convertible senior notes due 2023, which were settled during the third quarter of 2008.</font></div><br /><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Excluded from the computation of diluted income per share are options to purchase five million shares of common stock that were outstanding in 2010, seven million shares of common stock that were outstanding in 2009, and four million shares of common stock that were outstanding in 2008. These options were outstanding during these years but were excluded because they were antidilutive, as the option exercise price was greater than the average market price of the common shares.</font> </NonNumbericText> |
| <NonNumericTextHeader> Note 11. Income per ShareBasic income per share is based on the weighted average number of common shares outstanding during the </NonNumericTextHeader> |
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| | | <Unit> Other </Unit> |
| | | <ElementDataType> us-types:textBlockItemType </ElementDataType> |
| | | <SimpleDataType> string </SimpleDataType> |
| | | <ElementDefenition> This element may be used to capture the complete disclosure pertaining to an entity's earnings per share. </ElementDefenition> |
| | | <ElementReferences> Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 </ElementReferences> |
| | | <IsTotalLabel> false </IsTotalLabel> |
| | | <IsEPS> false </IsEPS> |
| | | <Label> Income per Share </Label> |
| | | </Row> |
| | </Rows> |
| <Footnotes/> |
| <NumberOfCols> 1 </NumberOfCols> |
| <NumberOfRows> 2 </NumberOfRows> |
| <ReportName> Income per Share </ReportName> |
| <MonetaryRoundingLevel> UnKnown </MonetaryRoundingLevel> |
| <SharesRoundingLevel> UnKnown </SharesRoundingLevel> |
| <PerShareRoundingLevel> UnKnown </PerShareRoundingLevel> |
| <ExchangeRateRoundingLevel> UnKnown </ExchangeRateRoundingLevel> |
| <HasCustomUnits> false </HasCustomUnits> |
| <SharesShouldBeRounded> true </SharesShouldBeRounded> |
| </InstanceReport> |