Share-based payments - Outstanding Stock Options (Details) |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2025
shares
$ / shares
|
Dec. 31, 2024
shares
$ / shares
|
|
| Share-based Payment Arrangements [Abstract] | ||
| Outstanding, beginning balance (in shares) | shares | 6,545,819 | 7,484,561 |
| Forfeited or expired (in shares) | shares | (1,042,645) | (938,742) |
| Outstanding, ending balance (in shares) | shares | 5,503,174 | 6,545,819 |
| Weighted average exercise price of share options outstanding, beginning balance (in cad per share) | $ / shares | $ 61 | $ 61 |
| Weighted average exercise price of share options forfeited or expired (in cad per share) | $ / shares | 57 | 59 |
| Weighted average exercise price of share options outstanding, ending balance (in cad per share) | $ / shares | $ 62 | $ 61 |
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- Definition Share-based Payment Arrangements [Abstract] No definition available.
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- Definition The number of share options outstanding in a share-based payment arrangement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The number of share options forfeited in a share-based payment arrangement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The weighted average exercise price of share options forfeited in a share-based payment arrangement. [Refer: Weighted average [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The weighted average exercise price of share options outstanding in a share-based payment arrangement. [Refer: Weighted average [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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