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Capital management (Capital management) (Details) - CAD ($) | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Capital management [abstract] |  |  |
Current portion of long-term debt | $ 499,821,000 | $ 0 |
Long-term debt | 1,284,353,000 | 997,000,000 |
Cash and cash equivalents | (566,809,000) | (1,143,674,000) | $ (1,247,447,000)
Short-term investments | 0 | (1,138,174,000) |
Net debt | 1,217,365,000 | (1,284,848,000) |
Non-controlling interest | 4,000 | 11,000 |
Shareholders' equity | 6,094,305,000 | 5,836,054,000 |
Total equity | 6,094,309,000 | 5,836,065,000 | $ 4,845,968,000
Total capital | $ 7,311,674,000 | $ 4,551,217,000 |

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