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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Jun. 29, 2013
Dec. 28, 2013
Income Tax Disclosure [Abstract]          
Effective tax rate 26.50% 25.00% 26.40% 24.10%  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate     35.00%    
Unrecognized tax benefits $ 4.0   $ 4.0   $ 4.4