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          <IsNumeric>true</IsNumeric>
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          <NumericAmount>-25000000</NumericAmount>
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        <Cell>
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          <IsNumeric>true</IsNumeric>
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        <Cell>
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          <ShowCurrencySymbol>false</ShowCurrencySymbol>
          <IsNumeric>true</IsNumeric>
          <IsRatio>false</IsRatio>
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        </Cell>
      </Cells>
      <OriginalInstanceReportColumns />
      <ElementDataType>xbrli:monetaryItemType</ElementDataType>
      <SimpleDataType>monetary</SimpleDataType>
      <ElementDefenition>The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.</ElementDefenition>
      <ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name FASB Interpretation (FIN)
 -Number 48
 -Paragraph 21
 -Subparagraph a(3)

</ElementReferences>
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    </Row>
    <Row>
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      <Level>1</Level>
      <ElementName>us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations</ElementName>
      <ElementPrefix>us-gaap</ElementPrefix>
      <IsBaseElement>true</IsBaseElement>
      <BalanceType>debit</BalanceType>
      <PeriodType>duration</PeriodType>
      <ShortDefinition>No definition available.</ShortDefinition>
      <IsReportTitle>false</IsReportTitle>
      <IsSegmentTitle>false</IsSegmentTitle>
      <IsSubReportEnd>false</IsSubReportEnd>
      <IsCalendarTitle>false</IsCalendarTitle>
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      <IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow>
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          <NumericAmount>-4000000</NumericAmount>
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          <ShowCurrencySymbol>false</ShowCurrencySymbol>
          <IsNumeric>true</IsNumeric>
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          <DisplayZeroAsNone>false</DisplayZeroAsNone>
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          <NonNumbericText />
          <NonNumericTextHeader />
          <FootnoteIndexer />
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      </Cells>
      <OriginalInstanceReportColumns />
      <ElementDataType>xbrli:monetaryItemType</ElementDataType>
      <SimpleDataType>monetary</SimpleDataType>
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      <ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name FASB Interpretation (FIN)
 -Number 48
 -Paragraph 21
 -Subparagraph a(4)

</ElementReferences>
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      <ElementPrefix>us-gaap</ElementPrefix>
      <IsBaseElement>true</IsBaseElement>
      <BalanceType>credit</BalanceType>
      <PeriodType>instant</PeriodType>
      <ShortDefinition>No definition available.</ShortDefinition>
      <IsReportTitle>false</IsReportTitle>
      <IsSegmentTitle>false</IsSegmentTitle>
      <IsSubReportEnd>false</IsSubReportEnd>
      <IsCalendarTitle>false</IsCalendarTitle>
      <IsTuple>false</IsTuple>
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      <IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow>
      <IsEquityAdjustmentRow>false</IsEquityAdjustmentRow>
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      <IsEndingBalance>true</IsEndingBalance>
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      <PreferredLabelRole>periodendlabel</PreferredLabelRole>
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      <FootnoteIndexer />
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          <ShowCurrencySymbol>true</ShowCurrencySymbol>
          <IsNumeric>true</IsNumeric>
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          <NumericAmount>184000000</NumericAmount>
          <RoundedNumericAmount>184</RoundedNumericAmount>
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        <Cell>
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          <ShowCurrencySymbol>true</ShowCurrencySymbol>
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      </Cells>
      <OriginalInstanceReportColumns />
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      <SimpleDataType>monetary</SimpleDataType>
      <ElementDefenition>The gross amount of unrecognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns) pertaining to uncertain tax positions taken in tax returns as of the beginning balance sheet date, excluding amounts pertaining to examined tax returns.</ElementDefenition>
      <ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef
 -Publisher FASB
 -Name FASB Interpretation (FIN)
 -Number 48
 -Paragraph 21
 -Subparagraph a

</ElementReferences>
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  <Footnotes />
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  <NumberOfRows>8</NumberOfRows>
  <HasScenarios>false</HasScenarios>
  <MonetaryRoundingLevel>Millions</MonetaryRoundingLevel>
  <SharesRoundingLevel>UnKnown</SharesRoundingLevel>
  <PerShareRoundingLevel>UnKnown</PerShareRoundingLevel>
  <HasPureData>false</HasPureData>
  <SharesShouldBeRounded>true</SharesShouldBeRounded>
</InstanceReport>
