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Stock-Based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
9 Months Ended
Sep. 28, 2014
Sep. 28, 2014
Stock Options [Member]
Sep. 28, 2014
Restricted Stock Units [Member]
May 08, 2014
Employee Share Purchase Plan [Member]
May 07, 2014
Employee Share Purchase Plan [Member]
May 08, 2014
Stock Incentive Plan [Member]
May 07, 2014
Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized       4,200,000 3,950,000 11,250,000 11,000,000
Shares available for grant 1,876,336            
Shares of common stock reserved for issuance 3,578,885            
Total compensation cost not yet recognized $ 49.9            
Total compensation cost not yet recognized - period for recognition 1 year 10 months 24 days            
Options Outstanding and Exercisable:              
Options outstanding, number   866,618          
Options exercisable, number   173,889          
Options outstanding, weighted average exercise price   $ 60.20          
Options exercisable, weighted average exercise price   $ 38.69          
Options outstanding, aggregate intrinsic value   17.9          
Options exercisable, aggregate intrinsic value   6.9          
Options outstanding, weighted average remaining contractual term (in years)   5 years 1 month 6 days          
Options exercisable, weighted average remaining contractual term (in years)   3 years 7 months 6 days          
Restricted Stock Units Nonvested and Expected to Vest              
Restricted stock units nonvested, number     835,933        
Restricted stock units expected to vest, number     750,036        
Restricted stock units nonvested, weighted average grant date per share fair value     $ 63.75        
Restricted stock units expected to vest, weighted average grant date per share fair value     $ 62.68        
Restricted stock units nonvested, aggregate intrinsic value     65.3        
Restricted stock units expected to vest, aggregate intrinsic value     $ 58.6        
Restricted stock units nonvested, weighted average remaining term to vest (in years)     1 year 3 months 18 days        
Restricted stock units expected to vest, weighted average remaining term to vest (in years)     1 year 2 months 12 days