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Contract costs | 12 Months Ended
--- | ---
Sep. 30, 2025
Revenue From Contracts With Customers [Abstract] |
Contract costs | Contract costs
| As at September 30, 2025 | As at September 30, 2024
| Cost | Accumulated amortization and impairment | Net carrying amount | Cost | Accumulated amortization and impairment | Net carrying amount
| $ | $ | $ | $ | $ | $
Transition costs | 690,012 |  | 323,563 |  | 366,449 |  | 610,971 |  | 274,243 |  | 336,728 |
Incentives | 18,757 |  | 14,274 |  | 4,483 |  | 51,045 |  | 43,744 |  | 7,301 |
| 708,769 |  | 337,837 |  | 370,932 |  | 662,016 |  | 317,987 |  | 344,029 |

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- Definition The entire disclosure for revenue from contracts with customers. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2025-01-01 -Section Presentation -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2025-en-r&doctype=Standard&dita_xref=IFRS15_g105-109_TI -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2025-01-01 -Section Disclosure -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2025-en-r&doctype=Standard&dita_xref=IFRS15_g110-129_TI -URIDate 2025-03-27 + Details
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