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Income Taxes (Details)
3 Months Ended 9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Sep. 29, 2012
Income Taxes        
Consolidated effective tax rates (as a percent) 28.80% 32.50% 28.70% 30.30%
U.S. statutory rate (as a percent)     35.00%