Commitments, contingencies and guarantees (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||
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Sep. 30, 2025 | |||||||||||||||||||||||||||||||||||||
| Other Provisions, Contingent Liabilities And Contingent Assets [Abstract] | |||||||||||||||||||||||||||||||||||||
| Disclosure of minimum payments under long-term service and other agreements | Minimum payments under these agreements are due as follows:
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