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Other Assets - Schedule of Other Assets (Details) - CAD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Jan. 01, 2023
--- | --- | --- | ---
Disclosure of other assets [line items] |  |  |
Financial assets | $ 195.7 | $ 204.5 |
Other assets | 327.5 | 296.3 |
Less current portion - financial | 26.2 | 15.8 |
Less current portion - non-financial | 1.3 | 1.3 |
Long-term portion | 300.0 | 279.2 | $ 224.6
Investments held for self-insured liabilities |  |  |
Disclosure of other assets [line items] |  |  |
Financial assets | 195.7 | 204.5 |
Holdbacks on long-term contracts |  |  |
Disclosure of other assets [line items] |  |  |
Financial assets | 43.7 | 25.2 |
Derivative financial instruments |  |  |
Disclosure of other assets [line items] |  |  |
Financial assets | 20.7 | 20.0 |
Insurance recovery assets |  |  |
Disclosure of other assets [line items] |  |  |
Financial assets | 10.6 | 0.0 |
Other |  |  |
Disclosure of other assets [line items] |  |  |
Financial assets | 39.2 | 28.6 |
Other | $ 17.6 | $ 18.0 |

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