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Stock Plans (Narrative) (Details)
12 Months Ended
Dec. 29, 2019
USD ($)
plan
$ / shares
shares
Dec. 30, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Stock-based Compensation Plans | plan 1    
Total income tax benefit recognized for stock-based compensation $ 11,600,000 $ 13,600,000 $ 14,500,000
Stock-based compensation costs capitalized as part of inventory 300,000    
Options related excess tax benefit, classified as a financing cash activity 0 0  
Aggregate intrinsic value for stock options outstanding $ 56,200,000    
Weighted average remaining contractual term of options (in years) 3 years 9 months 18 days    
Aggregate intrinsic value for stock options exercisable $ 46,200,000    
Weighted average remaining contractual term of options exercisable (in years) 2 years 10 months 24 days    
Number of shares vested and expected to vest in the future | shares 1,500,000    
Aggregate intrinsic value of vested and expected to vest stock options $ 56,200,000    
Weighted average remaining contractual term for options vested and expected to vest 3 years 9 months 18 days    
Total pre-tax stock-based compensation expense $ 31,514,000 $ 28,767,000 $ 25,421,000
Deferred compensation liability 10,400,000    
Acceleration of executive compensation $ 7,700,000    
Performance Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value of stock granted (per share) | $ / shares   $ 73.23 $ 52.69
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | shares 10,116 0 15,139
Total pre-tax stock-based compensation expense $ 5,600,000 $ 7,700,000 $ 8,700,000
Shares/units granted | shares 0 37,281 49,845
Awards/units outstanding | shares 71,213    
Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value of stock granted (per share) | $ / shares $ 95.84 $ 72.17 $ 63.14
Total pre-tax stock-based compensation expense $ 700,000 $ 800,000  
Shares/units granted | shares 7,301 11,088 12,006
Stock award program for non-employees Directors, fair market value $ 100,000 $ 100,000  
Restricted Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value of stock granted (per share) | $ / shares $ 94.80    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | shares 65,000    
Fair value of restricted stock awards vested $ 12,000,000.0 10,400,000 $ 10,600,000
Total pre-tax stock-based compensation expense 12,700,000 $ 11,700,000 $ 10,300,000
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock, granted $ 14,800,000    
Shares/units granted | shares 163,000    
Awards/units outstanding | shares 345,000 465,000  
Weighted-average period for recognition of unrecognized compensation cost, years 1 year 4 months 24 days    
Option vesting period (in years) 3 years    
Employee Stock Purchase Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized under plan | shares 5,000,000.0    
Weighted-average grant-date fair value of stock granted (per share) | $ / shares $ 82.25 $ 69.57 $ 67.09
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date 95.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 10.00%    
Shares/units granted | shares 33,843 21,321 36,769
Shares available for grant under employee stock purchase plan | shares 800,000    
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value of options | $ / shares $ 22.63 $ 17.56 $ 11.83
Total intrinsic value of options exercised $ 19,100,000 $ 35,000,000.0 $ 17,600,000
Cash received from option exercises 19,700,000 24,800,000 18,000,000.0
Total pre-tax stock-based compensation expense 6,700,000 $ 5,400,000 $ 4,700,000
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock, granted $ 6,300,000    
Weighted-average period for recognition of unrecognized compensation cost, years 1 year 9 months 18 days    
Option vesting period (in years)   3 years  
Stock Options Expiration Period After Date of Grant   7 years  
Performance Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average grant-date fair value of stock granted (per share) | $ / shares $ 92.95 $ 80.31  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | shares 18,777    
Total pre-tax stock-based compensation expense $ 5,900,000 $ 3,200,000  
Shares/units granted | shares 76,218 39,133  
Awards/units outstanding | shares 145,114