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SHAREHOLDERS' EQUITY (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
2 Months Ended 3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Jul. 24, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock repurchased and retired (in shares)   77,533   1,007,538    
Treasury stock acquired, average cost per share   $ 79.93   $ 77.74    
Repurchase of common stock, amount   $ 6.2   $ 78.3    
Compensation expense   3.3   10.5 $ 10.3  
Excess income tax benefit recognized related to share-based compensation   0.8 $ 1.3 2.5 $ 3.9  
Unrecognized compensation cost related to share-based compensation $ 27.1 $ 27.1   $ 27.1    
Weighted average period of recognition       2 years 2 months    
Number of shares available for grant 2,600,000 2,600,000   2,600,000    
Options and SAR's            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation expense       $ 2.7    
Unrecognized compensation cost related to share-based compensation $ 10.6 $ 10.6   $ 10.6    
Weighted average period of recognition       3 years 5 months    
Award vesting period       5 years    
Award expiration period       10 years    
Restricted Stock Awards (RSAs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation expense       $ 0.9    
Unrecognized compensation cost related to share-based compensation 0.8 0.8   $ 0.8    
Weighted average period of recognition       7 months    
Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation expense       $ 4.9    
Unrecognized compensation cost related to share-based compensation 9.0 9.0   $ 9.0    
Weighted average period of recognition       2 years    
Performance Share Units (PSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation expense       $ 2.0    
Unrecognized compensation cost related to share-based compensation $ 6.6 $ 6.6   $ 6.6    
Weighted average period of recognition       2 years 6 days    
Performance period       3 years    
Minimum | Performance Share Units (PSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance target percentage, payout       0.00%    
Maximum | Performance Share Units (PSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance target percentage, payout       200.00%    
2013 Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock repurchased and retired (in shares)       32,000    
Number of shares approved in repurchases program (in shares) 3,000,000.0 3,000,000.0   3,000,000.0    
2018 Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Repurchase of common stock, amount $ 3.6          
Stock repurchase program, authorized amount           $ 250.0