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Income Taxes (Summary Of Effective Tax Rate) (Detail)	3 Months Ended		9 Months Ended
Income Taxes (Summary Of Effective Tax Rate) (Detail)	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Income Taxes [Line Items]
Effective tax rate	31.00%	28.80%	27.50%	29.70%

- 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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