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      <FootnoteIndexer />
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        <Cell>
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          <ShowCurrencySymbol>false</ShowCurrencySymbol>
          <IsNumeric>true</IsNumeric>
          <IsRatio>false</IsRatio>
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          <NumericAmount>284600000</NumericAmount>
          <RoundedNumericAmount>284.6</RoundedNumericAmount>
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          <NonNumericTextHeader />
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          <ShowCurrencySymbol>false</ShowCurrencySymbol>
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          <NumericAmount>276000000</NumericAmount>
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        <Cell>
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          <ShowCurrencySymbol>false</ShowCurrencySymbol>
          <IsNumeric>true</IsNumeric>
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          <DisplayZeroAsNone>false</DisplayZeroAsNone>
          <NumericAmount>283700000</NumericAmount>
          <RoundedNumericAmount>283.7</RoundedNumericAmount>
          <NonNumbericText />
          <NonNumericTextHeader />
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          <hasSegments>false</hasSegments>
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        <Cell>
          <Id>4</Id>
          <ShowCurrencySymbol>false</ShowCurrencySymbol>
          <IsNumeric>true</IsNumeric>
          <IsRatio>false</IsRatio>
          <DisplayZeroAsNone>false</DisplayZeroAsNone>
          <NumericAmount>275400000</NumericAmount>
          <RoundedNumericAmount>275.4</RoundedNumericAmount>
          <NonNumbericText />
          <NonNumericTextHeader />
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          <hasSegments>false</hasSegments>
          <hasScenarios>false</hasScenarios>
          <DisplayDateInUSFormat>false</DisplayDateInUSFormat>
        </Cell>
      </Cells>
      <OriginalInstanceReportColumns />
      <ElementDataType>xbrli:sharesItemType</ElementDataType>
      <SimpleDataType>shares</SimpleDataType>
      <ElementDefenition>The average number of shares issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period.</ElementDefenition>
      <ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 128
 -Paragraph 40
 -Subparagraph a

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
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 -Paragraph 8

</ElementReferences>
      <IsTotalLabel>false</IsTotalLabel>
    </Row>
    <Row>
      <Id>7</Id>
      <Label>Net income for common stock per common share - basic</Label>
      <Level>1</Level>
      <ElementName>us-gaap_EarningsPerShareBasic</ElementName>
      <ElementPrefix>us-gaap</ElementPrefix>
      <IsBaseElement>true</IsBaseElement>
      <BalanceType>na</BalanceType>
      <PeriodType>duration</PeriodType>
      <ShortDefinition>No definition available.</ShortDefinition>
      <IsReportTitle>false</IsReportTitle>
      <IsSegmentTitle>false</IsSegmentTitle>
      <IsSubReportEnd>false</IsSubReportEnd>
      <IsCalendarTitle>false</IsCalendarTitle>
      <IsTuple>false</IsTuple>
      <IsAbstractGroupTitle>false</IsAbstractGroupTitle>
      <IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow>
      <IsEquityAdjustmentRow>false</IsEquityAdjustmentRow>
      <IsBeginningBalance>false</IsBeginningBalance>
      <IsEndingBalance>false</IsEndingBalance>
      <IsReverseSign>false</IsReverseSign>
      <PreferredLabelRole>terselabel</PreferredLabelRole>
      <IsEPS>true</IsEPS>
      <FootnoteIndexer />
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        <Cell>
          <Id>1</Id>
          <ShowCurrencySymbol>true</ShowCurrencySymbol>
          <IsNumeric>true</IsNumeric>
          <IsRatio>false</IsRatio>
          <DisplayZeroAsNone>false</DisplayZeroAsNone>
          <NumericAmount>1.24</NumericAmount>
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          <hasSegments>false</hasSegments>
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        <Cell>
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          <ShowCurrencySymbol>true</ShowCurrencySymbol>
          <IsNumeric>true</IsNumeric>
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          <DisplayZeroAsNone>false</DisplayZeroAsNone>
          <NumericAmount>1.22</NumericAmount>
          <RoundedNumericAmount>1.22</RoundedNumericAmount>
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        <Cell>
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          <ShowCurrencySymbol>true</ShowCurrencySymbol>
          <IsNumeric>true</IsNumeric>
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          <NumericAmount>2.69</NumericAmount>
          <RoundedNumericAmount>2.69</RoundedNumericAmount>
          <NonNumbericText />
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        <Cell>
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          <ShowCurrencySymbol>true</ShowCurrencySymbol>
          <IsNumeric>true</IsNumeric>
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          <DisplayZeroAsNone>false</DisplayZeroAsNone>
          <NumericAmount>2.43</NumericAmount>
          <RoundedNumericAmount>2.43</RoundedNumericAmount>
          <NonNumbericText />
          <NonNumericTextHeader />
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          <hasSegments>false</hasSegments>
          <hasScenarios>false</hasScenarios>
          <DisplayDateInUSFormat>false</DisplayDateInUSFormat>
        </Cell>
      </Cells>
      <OriginalInstanceReportColumns />
      <ElementDataType>us-types:perShareItemType</ElementDataType>
      <SimpleDataType>decimal</SimpleDataType>
      <ElementDefenition>The amount of net income or loss for the period per each share of common stock outstanding during the reporting period.</ElementDefenition>
      <ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 04
 -Paragraph 21
 -Article 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
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 -Paragraph 36, 37, 38

Reference 3: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 03
 -Paragraph 20
 -Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 04
 -Paragraph 18
 -Article 7

</ElementReferences>
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    <Row>
      <Id>8</Id>
      <Label>Net income for common stock per common share - diluted</Label>
      <Level>1</Level>
      <ElementName>us-gaap_EarningsPerShareDiluted</ElementName>
      <ElementPrefix>us-gaap</ElementPrefix>
      <IsBaseElement>true</IsBaseElement>
      <BalanceType>na</BalanceType>
      <PeriodType>duration</PeriodType>
      <ShortDefinition>No definition available.</ShortDefinition>
      <IsReportTitle>false</IsReportTitle>
      <IsSegmentTitle>false</IsSegmentTitle>
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      <IsEquityAdjustmentRow>false</IsEquityAdjustmentRow>
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          <ShowCurrencySymbol>true</ShowCurrencySymbol>
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          <DisplayZeroAsNone>false</DisplayZeroAsNone>
          <NumericAmount>1.23</NumericAmount>
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        <Cell>
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          <ShowCurrencySymbol>true</ShowCurrencySymbol>
          <IsNumeric>true</IsNumeric>
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        <Cell>
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          <ShowCurrencySymbol>true</ShowCurrencySymbol>
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          <DisplayZeroAsNone>false</DisplayZeroAsNone>
          <NumericAmount>2.68</NumericAmount>
          <RoundedNumericAmount>2.68</RoundedNumericAmount>
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          <DisplayZeroAsNone>false</DisplayZeroAsNone>
          <NumericAmount>2.42</NumericAmount>
          <RoundedNumericAmount>2.42</RoundedNumericAmount>
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          <hasSegments>false</hasSegments>
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      </Cells>
      <OriginalInstanceReportColumns />
      <ElementDataType>us-types:perShareItemType</ElementDataType>
      <SimpleDataType>decimal</SimpleDataType>
      <ElementDefenition>The amount of net income or loss for the period per each share of common stock and dilutive common stock equivalents outstanding during the reporting period.</ElementDefenition>
      <ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name Statement of Financial Accounting Standard (FAS)
 -Number 128
 -Paragraph 11, 12, 36

Reference 2: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 03
 -Paragraph 20
 -Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 04
 -Paragraph 18
 -Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef
 -Publisher SEC
 -Name Regulation S-X (SX)
 -Number 210
 -Section 04
 -Paragraph 21
 -Article 9

</ElementReferences>
      <IsTotalLabel>false</IsTotalLabel>
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  </Rows>
  <Footnotes />
  <NumberOfCols>4</NumberOfCols>
  <NumberOfRows>7</NumberOfRows>
  <HasScenarios>false</HasScenarios>
  <MonetaryRoundingLevel>Millions</MonetaryRoundingLevel>
  <SharesRoundingLevel>HundredThousands</SharesRoundingLevel>
  <PerShareRoundingLevel>NoRounding</PerShareRoundingLevel>
  <HasPureData>false</HasPureData>
  <SharesShouldBeRounded>true</SharesShouldBeRounded>
</InstanceReport>
