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Segmented information - Disclosure of PP&E, contract costs and intangible assets information by location (Details) - CAD ($) $ in Thousands | Sep. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | $ 1,803,146 | $ 1,782,300
U.S. |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 557,381 | 556,075
Canada |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 427,811 | 374,757
France |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 200,842 | 217,261
U.K. |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 115,560 | 112,924
Finland |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 100,212 | 97,486
Sweden |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 94,801 | 100,088
Germany |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 85,013 | 89,527
India |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 65,664 | 71,942
Netherlands |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | 49,570 | 47,274
Rest of the world |  |
Disclosure of operating segments [line items] |  |
PP&E, contract costs and intangible assets | $ 106,292 | $ 114,966

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