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Share-Based Payments - Share Based Options by Exercise Price (Details) shares in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 shares $ / shares | Dec. 31, 2020 shares $ / shares | Dec. 31, 2019 shares $ / shares
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of options outstanding (in shares) | shares | 3,042 | 3,173 | 3,074
Weighted average exercise price (in CAD per share) | $ 55.85 | $ 49.65 | $ 42.36
$18.00 to $24.00 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of options outstanding (in shares) | shares | 11,000 |  |
Weighted average remaining contractual life (years) | 1 month 28 days |  |
Weighted average exercise price (in CAD per share) | $ 21.53 |  |
$18.00 to $24.00 | Bottom of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices (in CAD per share) | 18.00 |  |
$18.00 to $24.00 | Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices (in CAD per share) | $ 24.00 |  |
$35.01 to $45.00 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of options outstanding (in shares) | shares | 245,000 |  |
Weighted average remaining contractual life (years) | 3 years 21 days |  |
Weighted average exercise price (in CAD per share) | $ 39.71 |  |
$35.01 to $45.00 | Bottom of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices (in CAD per share) | 35.01 |  |
$35.01 to $45.00 | Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices (in CAD per share) | $ 45.00 |  |
$45.01 to $65.84 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of options outstanding (in shares) | shares | 2,786,000 |  |
Weighted average remaining contractual life (years) | 6 years 8 months 23 days |  |
Weighted average exercise price (in CAD per share) | $ 57.41 |  |
$45.01 to $65.84 | Bottom of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices (in CAD per share) | 45.01 |  |
$45.01 to $65.84 | Top of range |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Range of exercise prices (in CAD per share) | $ 65.84 |  |
Total stock options |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of options outstanding (in shares) | shares | 3,042,000 |  |
Weighted average remaining contractual life (years) | 6 years 4 months 28 days |  |
Weighted average exercise price (in CAD per share) | $ 55.85 |  |

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