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v3.25.3

Segmented information - Disclosure of revenue information based on services provided by the Company (Details) - CAD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024
Disclosure of products and services [line items] |  |
Revenue | $ 15,912,673 | $ 14,676,152
Managed IT and business process services |  |
Disclosure of products and services [line items] |  |
Revenue | 8,820,863 | 8,041,857
Business and strategic IT consulting and systems integration services |  |
Disclosure of products and services [line items] |  |
Revenue | $ 7,091,810 | $ 6,634,295

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