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STOCK-BASED COMPENSATION - Stock Option Range of Exercise Prices (Details)
 12 Months Ended
Dec. 31, 2020
shares
$ / shares
Dec. 31, 2019
shares
$ / shares
Dec. 31, 2018
shares
$ / shares
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Options outstanding, Number outstanding (in shares) | shares 4,726,634 3,154,795 2,719,612
Options outstanding, Weighted average remaining contractual life (years) 7 years 3 months 18 days    
Options outstanding, Weighted average exercise price (in dollars per share) $ 62.10 $ 61.82 $ 53.22
Options exercisable, Number exercisable (in shares) | shares 1,470,383 993,645  
Options exercisable, Weighted average exercise price (in dollars per share) $ 56.75 $ 52.38  
$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) 3 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 499,844    
Options outstanding, Weighted average remaining contractual life (years) 3 years    
Options outstanding, Weighted average exercise price (in dollars per share) $ 48.87    
Options exercisable, Number exercisable (in shares) | shares 499,844    
Options exercisable, Weighted average exercise price (in dollars per share) $ 48.87    
$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 890,011    
Options outstanding, Weighted average remaining contractual life (years) 6 years 4 months 28 days    
Options outstanding, Weighted average exercise price (in dollars per share) $ 58.10    
Options exercisable, Number exercisable (in shares) | shares 380,499    
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 2,013,647    
Options outstanding, Weighted average remaining contractual life (years) 8 years 7 months 28 days    
Options outstanding, Weighted average exercise price (in dollars per share) $ 62.63    
Options exercisable, Number exercisable (in shares) | shares 134,379    
Options exercisable, Weighted average exercise price (in dollars per share) $ 62.89    
$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) 8 years 4 months 17 days    
Options outstanding, Weighted average exercise price (in dollars per share) $ 66.21    
Options exercisable, Number exercisable (in shares) | shares 41,684    
Options exercisable, Weighted average exercise price (in dollars per share) $ 66.64    
$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) 7 years 10 months 20 days    
Options outstanding, Weighted average exercise price (in dollars per share) $ 73.00    
Options exercisable, Number exercisable (in shares) | shares 260,040    
Options exercisable, Weighted average exercise price (in dollars per share) $ 73.00    
$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