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SHAREHOLDERS' EQUITY (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock repurchased and retired (in shares) 300,000   576,804  
Treasury stock acquired, average cost per share $ 77.84   $ 78.12  
Repurchase of common stock, amount $ 23.4   $ 45.1  
Number of shares approved in repurchases program (in shares) 3,000,000.0   3,000,000.0  
Number of shares available for repurchase (in shares) 1,700,000   1,700,000  
Compensation expense $ 3.3 $ 3.0 $ 10.3 $ 10.1
Excess income tax benefit recognized related to share-based compensation 1.3 $ 1.1 3.9 $ 3.8
Unrecognized compensation cost related to share-based compensation $ 27.9   $ 27.9  
Weighted average period of recognition     2 years 2 months  
Number of shares available for grant 1,000,000   1,000,000  
Options and SAR's        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense     $ 3.2  
Unrecognized compensation cost related to share-based compensation $ 11.0   $ 11.0  
Weighted average period of recognition     3 years 6 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     $ 0.8  
Unrecognized compensation cost related to share-based compensation 0.7   $ 0.7  
Weighted average period of recognition     7 months  
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense     $ 4.7  
Unrecognized compensation cost related to share-based compensation 10.0   $ 10.0  
Weighted average period of recognition     1 year 11 months 6 days  
Performance Share Units (PSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense     $ 1.6  
Unrecognized compensation cost related to share-based compensation $ 6.2   $ 6.2  
Weighted average period of recognition     2 years 1 month 12 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%