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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 |  |

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