Income taxes (Movement in net deferred tax assets and liabilities) (Details) - CAD ($) |
12 Months Ended | |
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Dec. 31, 2025 |
Dec. 31, 2024 |
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| Reconciliation of changes in deferred tax liability (asset) [abstract] | ||
| Deferred tax asset at beginning of year | $ 843,131,000 | $ 892,860,000 |
| Expense for the year in net earnings | (176,962,000) | (51,296,000) |
| Recovery for the year in other comprehensive income | 431,000 | 969,000 |
| Effect of movements in exchange rates | (143,000) | 598,000 |
| End of year | $ 666,457,000 | $ 843,131,000 |
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of income tax relating to amounts recognised in other comprehensive income. [Refer: Other comprehensive income] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The increase (decrease) in deferred tax liability (asset) resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Deferred tax liability (asset)] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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