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Income Taxes (Details)	3 Months Ended		9 Months Ended
Income Taxes (Details)	Sep. 29, 2012	Sep. 24, 2011	Sep. 29, 2012	Sep. 24, 2011
Income Tax Disclosure [Abstract]
Effective Income Tax Rate, Continuing Operations	35.50%	36.70%	36.70%	36.60%
Expected full year effective tax rate (in hundredths)			36.70%

- 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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