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Contract costs (Details) - CAD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Disclosure Of Contract Costs [Line Items] |  |
Transition costs | $ 366,449 | $ 336,728
Incentives | 4,483 | 7,301
Contract assets | 370,932 | 344,029
Cost |  |
Disclosure Of Contract Costs [Line Items] |  |
Transition costs | 690,012 | 610,971
Incentives | 18,757 | 51,045
Contract assets | 708,769 | 662,016
Accumulated amortization and impairment |  |
Disclosure Of Contract Costs [Line Items] |  |
Transition costs | 323,563 | 274,243
Incentives | 14,274 | 43,744
Contract assets | $ 337,837 | $ 317,987

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- Definition The amount of non-current contract assets. [Refer: Contract assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2025-01-01 -Paragraph 105 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2025-en-r&anchor=para_105&doctype=Standard -URIDate 2025-03-27 + Details
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