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Income Taxes (Details) | 3 Months Ended | 9 Months Ended
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Sep. 07, 2013 | Sep. 08, 2012 | Sep. 07, 2013 | Sep. 08, 2012
Income Tax Disclosure [Abstract] |  |  |  |
Effective tax rate (percent) | 25.90% | 27.10% | 24.20% | 17.70%

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