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Income Taxes - Additional Information (Detail)	3 Months Ended		9 Months Ended
Income Taxes - Additional Information (Detail)	Jun. 29, 2012	Jul. 01, 2011	Jun. 29, 2012	Jul. 01, 2011
Income Tax
Effective tax rate	29.30%	29.90%	28.20%	30.50%

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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