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| <ReportLongName> 152 - Disclosure - Changes in Shares of Common Stock Outstanding (Detail) </ReportLongName> |
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| <Label Id="1" Label="9 Months Ended"/> |
| <Label Id="2" Label="Sep. 26, 2010"/> |
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| | | <CurrencyCode> USD </CurrencyCode> |
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| | | <Label> Balance at beginning of period </Label> |
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| | | <ElementPrefix> us-gaap </ElementPrefix> |
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| | | <ElementDataType> xbrli:sharesItemType </ElementDataType> |
| | | <SimpleDataType> shares </SimpleDataType> |
| | | <ElementDefenition> Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Excludes common shares repurchased by the entity and held as Treasury shares. Shares outstanding equals shares issued minus shares held in treasury. Does not include common shares that have been repurchased. </ElementDefenition> |
| | | <ElementReferences> Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 </ElementReferences> |
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| | | <Label> Warrants exercised </Label> |
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| | | <ElementPrefix> rtn </ElementPrefix> |
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| | | <PeriodType> duration </PeriodType> |
| | | <ShortDefinition> Number of shares issued during the period as a result of the exercise of warrants. </ShortDefinition> |
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| | | <ElementDataType> xbrli:sharesItemType </ElementDataType> |
| | | <SimpleDataType> shares </SimpleDataType> |
| | | <ElementDefenition> Number of shares issued during the period as a result of the exercise of warrants. </ElementDefenition> |
| | | <ElementReferences> No authoritative reference available. </ElementReferences> |
| | | <IsTotalLabel> false </IsTotalLabel> |
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| | | <Id> 7 </Id> |
| | | <Label> Stock plan activity </Label> |
| | | <Level> 3 </Level> |
| | | <ElementName> rtn_StockIssuedDuringPeriodSharesOtherStockPlans </ElementName> |
| | | <ElementPrefix> rtn </ElementPrefix> |
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| | | <ShortDefinition> Number of shares issued during the period related to other stock plans. </ShortDefinition> |
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| | | <SimpleDataType> shares </SimpleDataType> |
| | | <ElementDefenition> Number of shares issued during the period related to other stock plans. </ElementDefenition> |
| | | <ElementReferences> No authoritative reference available. </ElementReferences> |
| | | <IsTotalLabel> false </IsTotalLabel> |
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| | <Row> |
| | | <Id> 8 </Id> |
| | | <Label> Treasury stock repurchases </Label> |
| | | <Level> 3 </Level> |
| | | <ElementName> us-gaap_TreasuryStockSharesAcquired </ElementName> |
| | | <ElementPrefix> us-gaap </ElementPrefix> |
| | | <IsBaseElement> true </IsBaseElement> |
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| | | <ElementDataType> xbrli:sharesItemType </ElementDataType> |
| | | <SimpleDataType> shares </SimpleDataType> |
| | | <ElementDefenition> Number of shares that have been repurchased during the period and are being held in treasury. </ElementDefenition> |
| | | <ElementReferences> Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 </ElementReferences> |
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| | | <Label> Balance at end of period </Label> |
| | | <Level> 3 </Level> |
| | | <ElementName> us-gaap_CommonStockSharesOutstanding </ElementName> |
| | | <ElementPrefix> us-gaap </ElementPrefix> |
| | | <IsBaseElement> true </IsBaseElement> |
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| | | <OriginalInstanceReportColumns/> |
| | | <ElementDataType> xbrli:sharesItemType </ElementDataType> |
| | | <SimpleDataType> shares </SimpleDataType> |
| | | <ElementDefenition> Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Excludes common shares repurchased by the entity and held as Treasury shares. Shares outstanding equals shares issued minus shares held in treasury. Does not include common shares that have been repurchased. </ElementDefenition> |
| | | <ElementReferences> Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 </ElementReferences> |
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| <Footnotes/> |
| <NumberOfCols> 1 </NumberOfCols> |
| <NumberOfRows> 5 </NumberOfRows> |
| <HasScenarios> false </HasScenarios> |
| <MonetaryRoundingLevel> UnKnown </MonetaryRoundingLevel> |
| <SharesRoundingLevel> HundredThousands </SharesRoundingLevel> |
| <PerShareRoundingLevel> UnKnown </PerShareRoundingLevel> |
| <HasPureData> false </HasPureData> |
| <SharesShouldBeRounded> true </SharesShouldBeRounded> |
| </InstanceReport> |