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Capital management (Capital management) (Details) - CAD ($) | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
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Capital management [abstract] |  |  |
Current portion of long-term debt | $ 285,707,000 | $ 499,821,000 |
Long-term debt | 995,583,000 | 1,284,353,000 |
Cash and cash equivalents | (600,462,000) | (566,809,000) | $ (1,143,674,000)
Net debt | 680,828,000 | 1,217,365,000 |
Non-controlling interest | 26,000 | 4,000 |
Shareholders' equity | 6,364,307,000 | 6,094,305,000 |
Total equity | 6,364,333,000 | 6,094,309,000 | $ 5,836,065,000
Total capital | $ 7,045,161,000 | $ 7,311,674,000 |

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