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STOCK-BASED COMPENSATION - Stock Option Range of Exercise Prices (Details)
 12 Months Ended
Dec. 31, 2019
shares
$ / shares
Dec. 31, 2018
shares
$ / shares
Dec. 31, 2017
shares
$ / shares
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Options outstanding, Number outstanding (in shares) | shares 3,154,795 2,719,612 2,637,890
Options outstanding, Weighted average remaining contractual life (years) 7 years 6 months 21 days    
Options outstanding, Weighted average exercise price (in dollars per share) $ 61.82 $ 53.22 $ 49.42
Options exercisable, Number exercisable (in shares) | shares 993,645 1,059,590  
Options exercisable, Weighted average exercise price (in dollars per share) $ 52.38 $ 46.26  
$42.85 - $44.99      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Options outstanding, Number outstanding (in shares) | shares 153,937    
Options outstanding, Weighted average remaining contractual life (years) 4 years 9 months 25 days    
Options outstanding, Weighted average exercise price (in dollars per share) $ 44.24    
Options exercisable, Number exercisable (in shares) | shares 153,937    
Options exercisable, Weighted average exercise price (in dollars per share) $ 44.24    
$42.85 - $44.99 | Minimum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 42.85    
$42.85 - $44.99 | Maximum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 44.99    
$45.00 - $49.99      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Options outstanding, Number outstanding (in shares) | shares 506,011    
Options outstanding, Weighted average remaining contractual life (years) 4 years 8 months 1 day    
Options outstanding, Weighted average exercise price (in dollars per share) $ 48.88    
Options exercisable, Number exercisable (in shares) | shares 442,257    
Options exercisable, Weighted average exercise price (in dollars per share) $ 48.73    
$45.00 - $49.99 | Minimum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 45.00    
$45.00 - $49.99 | Maximum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 49.99    
$50.00 - $59.99      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Options outstanding, Number outstanding (in shares) | shares 910,595    
Options outstanding, Weighted average remaining contractual life (years) 7 years 9 months 3 days    
Options outstanding, Weighted average exercise price (in dollars per share) $ 58.10    
Options exercisable, Number exercisable (in shares) | shares 265,564    
Options exercisable, Weighted average exercise price (in dollars per share) $ 57.82    
$50.00 - $59.99 | Minimum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 50.00    
$50.00 - $59.99 | Maximum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 59.99    
$60.00 - $64.99      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Options outstanding, Number outstanding (in shares) | shares 415,057    
Options outstanding, Weighted average remaining contractual life (years) 7 years 8 months 19 days    
Options outstanding, Weighted average exercise price (in dollars per share) $ 62.91    
Options exercisable, Number exercisable (in shares) | shares 122,459    
Options exercisable, Weighted average exercise price (in dollars per share) $ 62.82    
$60.00 - $64.99 | Minimum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 60.00    
$60.00 - $64.99 | Maximum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 64.99    
$65.00 - $69.99      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Options outstanding, Number outstanding (in shares) | shares 129,025    
Options outstanding, Weighted average remaining contractual life (years) 9 years 4 months 17 days    
Options outstanding, Weighted average exercise price (in dollars per share) $ 66.21    
Options exercisable, Number exercisable (in shares) | shares 9,428    
Options exercisable, Weighted average exercise price (in dollars per share) $ 68.10    
$65.00 - $69.99 | Minimum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 65.00    
$65.00 - $69.99 | Maximum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 69.99    
$70.00 - $73.00      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Options outstanding, Number outstanding (in shares) | shares 1,040,170    
Options outstanding, Weighted average remaining contractual life (years) 8 years 10 months 24 days    
Options outstanding, Weighted average exercise price (in dollars per share) $ 73.00    
Options exercisable, Number exercisable (in shares) | shares 0    
Options exercisable, Weighted average exercise price (in dollars per share) $ 0    
$70.00 - $73.00 | Minimum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices 70.00    
$70.00 - $73.00 | Maximum      
Disclosure of range of exercise prices of outstanding share options [line items]      
Range of exercise prices $ 73.00