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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Dec. 29, 2012
Income Tax Disclosure [Abstract]      
Effective tax rate 23.20% 26.30%  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate 35.00%    
Unrecognized tax benefits     $ 5.7