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v3.20.4

Range of Exercise Prices for Options Outstanding (Detail) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 shares $ / shares | Dec. 31, 2020 shares $ / shares | Dec. 31, 2019 shares $ / shares | Dec. 31, 2019 shares $ / shares | Dec. 31, 2018 shares $ / shares | Dec. 31, 2018 shares $ / shares
Canadian Share Options [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Number | shares | 148,665 | 148,665 | 201,079 | 201,079 | 236,658 | 236,658
Total options outstanding, Weighted average exercise price | $ 138.86 |  | $ 145.88 |  | $ 155.56 |
Options exercisable, Number | shares | 141,156 | 141,156 | 178,453 | 178,453 | 189,324 | 189,324
Canadian Share Options [Member] | 87.00 – 139.99 Range of Exercise Prices [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Number | shares | 47,970 | 47,970 |  |  |  |
Total options outstanding, Weighted average exercise price | $ 88.17 |  |  |  |  |
Total options outstanding, Weighted average remaining contractual life (years) | 3 years 1 month 2 days |  |  |  |  |
Options exercisable, Number | shares | 40,461 | 40,461 |  |  |  |
Options exercisable, Weighted average exercise price | $ 88.38 |  |  |  |  |
Canadian Share Options [Member] | 87.00 – 139.99 Range of Exercise Prices [Member] | Top of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | 87.00 |  |  |  |  |
Canadian Share Options [Member] | 87.00 – 139.99 Range of Exercise Prices [Member] | Bottom Of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | $ 139.99 |  |  |  |  |
Canadian Share Options [Member] | 140.00 – 279.99 Range of Exercise Prices [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Number | shares | 99,710 | 99,710 |  |  |  |
Total options outstanding, Weighted average exercise price | $ 161.80 |  |  |  |  |
Total options outstanding, Weighted average remaining contractual life (years) | 1 year 2 months 8 days |  |  |  |  |
Options exercisable, Number | shares | 99,710 | 99,710 |  |  |  |
Options exercisable, Weighted average exercise price | $ 161.80 |  |  |  |  |
Canadian Share Options [Member] | 140.00 – 279.99 Range of Exercise Prices [Member] | Top of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | 140.00 |  |  |  |  |
Canadian Share Options [Member] | 140.00 – 279.99 Range of Exercise Prices [Member] | Bottom Of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | $ 279.99 |  |  |  |  |
Canadian Share Options [Member] | 280.00 – 286.20 Range of Exercise Prices [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Number | shares | 985 | 985 |  |  |  |
Total options outstanding, Weighted average exercise price | $ 286.20 |  |  |  |  |
Total options outstanding, Weighted average remaining contractual life (years) | 4 months 2 days |  |  |  |  |
Options exercisable, Number | shares | 985 | 985 |  |  |  |
Options exercisable, Weighted average exercise price | $ 286.20 |  |  |  |  |
Canadian Share Options [Member] | 280.00 – 286.20 Range of Exercise Prices [Member] | Top of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | 280.00 |  |  |  |  |
Canadian Share Options [Member] | 280.00 – 286.20 Range of Exercise Prices [Member] | Bottom Of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | $ 286.20 |  |  |  |  |
Canadian Share Options [Member] | 87.00 – 286.20 Range of Exercise Prices [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Number | shares | 148,665 | 148,665 |  |  |  |
Total options outstanding, Weighted average exercise price | $ 138.86 |  |  |  |  |
Total options outstanding, Weighted average remaining contractual life (years) | 1 year 9 months 18 days |  |  |  |  |
Options exercisable, Number | shares | 141,156 | 141,156 |  |  |  |
Options exercisable, Weighted average exercise price | $ 141.62 |  |  |  |  |
Canadian Share Options [Member] | 87.00 – 286.20 Range of Exercise Prices [Member] | Top of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | 87.00 |  |  |  |  |
Canadian Share Options [Member] | 87.00 – 286.20 Range of Exercise Prices [Member] | Bottom Of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | $ 286.20 |  |  |  |  |
U.S. Share Options [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Number | shares | 283,793 | 283,793 | 318,153 | 318,153 | 303,293 | 303,293
Total options outstanding, Weighted average exercise price |  | $ 86.23 |  | $ 93.32 |  | $ 103.47
Options exercisable, Number | shares | 239,521 | 239,521 | 217,441 | 217,441 | 161,204 | 161,204
U.S. Share Options [Member] | 51.20 – 79.99 Range of Exercise Prices [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Number | shares | 176,603 | 176,603 |  |  |  |
Total options outstanding, Weighted average exercise price | $ 64.01 |  |  |  |  |
Total options outstanding, Weighted average remaining contractual life (years) | 3 years 5 months 26 days |  |  |  |  |
Options exercisable, Number | shares | 132,331 | 132,331 |  |  |  |
Options exercisable, Weighted average exercise price | $ 65.04 |  |  |  |  |
U.S. Share Options [Member] | 51.20 – 79.99 Range of Exercise Prices [Member] | Top of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | 51.20 |  |  |  |  |
U.S. Share Options [Member] | 51.20 – 79.99 Range of Exercise Prices [Member] | Bottom Of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | $ 79.99 |  |  |  |  |
U.S. Share Options [Member] | 80.00 – 139.99 Range of Exercise Prices [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Number | shares | 91,240 | 91,240 |  |  |  |
Total options outstanding, Weighted average exercise price | $ 112.21 |  |  |  |  |
Total options outstanding, Weighted average remaining contractual life (years) | 2 years 4 months 17 days |  |  |  |  |
Options exercisable, Number | shares | 91,240 | 91,240 |  |  |  |
Options exercisable, Weighted average exercise price | $ 112.21 |  |  |  |  |
U.S. Share Options [Member] | 80.00 – 139.99 Range of Exercise Prices [Member] | Top of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | 80.00 |  |  |  |  |
U.S. Share Options [Member] | 80.00 – 139.99 Range of Exercise Prices [Member] | Bottom Of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | $ 139.99 |  |  |  |  |
U.S. Share Options [Member] | 140.00 – 183.60 Range of Exercise Prices [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Number | shares | 15,950 | 15,950 |  |  |  |
Total options outstanding, Weighted average exercise price | $ 183.60 |  |  |  |  |
Total options outstanding, Weighted average remaining contractual life (years) | 1 month 13 days |  |  |  |  |
Options exercisable, Number | shares | 15,950 | 15,950 |  |  |  |
Options exercisable, Weighted average exercise price | $ 183.60 |  |  |  |  |
U.S. Share Options [Member] | 140.00 – 183.60 Range of Exercise Prices [Member] | Top of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | 140.00 |  |  |  |  |
U.S. Share Options [Member] | 140.00 – 183.60 Range of Exercise Prices [Member] | Bottom Of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | $ 183.60 |  |  |  |  |
U.S. Share Options [Member] | 51.20 – 183.60 Range of Exercise Prices [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Number | shares | 283,793 | 283,793 |  |  |  |
Total options outstanding, Weighted average exercise price | $ 86.23 |  |  |  |  |
Total options outstanding, Weighted average remaining contractual life (years) | 2 years 11 months 8 days |  |  |  |  |
Options exercisable, Number | shares | 239,521 | 239,521 |  |  |  |
Options exercisable, Weighted average exercise price | $ 90.90 |  |  |  |  |
U.S. Share Options [Member] | 51.20 – 183.60 Range of Exercise Prices [Member] | Top of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | 51.20 |  |  |  |  |
U.S. Share Options [Member] | 51.20 – 183.60 Range of Exercise Prices [Member] | Bottom Of Range [Member] |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |  |  |
Total options outstanding, Range of exercise prices | $ 183.60 |  |  |  |  |

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