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Segmented information - Disclosure of PP&E, contract costs and intangible assets information by location (Details) - CAD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | $ 1,895,542 | $ 1,803,146
U.S. |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 656,176 | 557,381
Canada |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 433,965 | 427,811
France |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 182,015 | 200,842
U.K. |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 107,649 | 115,560
Finland |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 101,137 | 100,212
Sweden |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 105,491 | 94,801
Germany |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 94,704 | 85,013
India |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 65,185 | 65,664
Netherlands |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 54,552 | 49,570
Rest of the world |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | $ 94,668 | $ 106,292

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