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Stock-Based Compensation Plans (Narrative) (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
May. 06, 2016
$ / shares
shares
Apr. 03, 2016
USD ($)
installment
$ / shares
shares
Mar. 29, 2015
USD ($)
shares
Jan. 01, 2017
USD ($)
Jan. 03, 2016
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option compensation expense | $   $ 3.3 $ 3.8    
Options granted in the period         0
Stock with restrictions removed (in shares)   39,568      
Scenario, Forecast          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Expected stock option compensation expense | $       $ 11.7  
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of annual performance share plan installments | installment   3      
Performance shares issued   864 1,944    
Shares expected to be issued in two equal installments   1,883      
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grants in period (shares)   37,104      
Weighted average fair value (in USD per share) | $ / shares   $ 72.91      
Employee | Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period over which employee stock option grants are evenly expensed   3 years      
Director | Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period over which employee stock option grants are evenly expensed   1 year      
Director | Restricted Stock Units (RSUs) | Subsequent Event          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period over which employee stock option grants are evenly expensed 1 year        
Performance shares issued 10,305        
Issues in period, fair market value (in USD per share) | $ / shares $ 96.00