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Stock-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Mar. 29, 2013
Mar. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Proceeds from stock options exercised $ 12.8 $ 0.8
Excess Tax Benefit from Share-based Compensation, Operating Activities 0.1  
Restricted Stock Units (RSUs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted Stock Awards, Awards that Will Vest, Period 3 years  
Compensation expense $ 0.4 $ 0.3
Restricted Stock [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted Stock Awards, Awards that Will Vest, Period 6 months  
Restricted Stock Awards, Percent that Vest on the Date of Grant 50.00%  
Restricted Stock Awards, Percent that Vest upon retirement 0.5  
Dividend Equivalent Units (DEUs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Price per share $ 26.98  
Share-based Payment Award Nonvested, Number 1,516  
Maximum [Member] | Restricted Stock Units (RSUs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted Stock Units, Number of Units Granted 100.00%  
Minimum [Member] | Restricted Stock Units (RSUs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted Stock Units, Number of Units Granted 0.00%