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Accounts receivable (Tables) | 12 Months Ended
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Sep. 30, 2025
Subclassifications of assets, liabilities and equities [abstract] |
Disclosure of accounts receivable |
| As at September 30, 2025 | As at September 30, 2024
| $ | $
Trade (Note 32) | 1,343,282 |  | 1,117,712 |
Tax credits and R&D tax credits | 167,599 |  | 149,955 |
Other | 102,896 |  | 130,735 |
| 1,613,777 |  | 1,398,402 |

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