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Contract costs (Details) - CAD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Disclosure Of Contract Costs [Line Items] |  |
Transition costs | $ 336,728 | $ 299,001
Incentives | 7,301 | 9,445
Contract assets | 344,029 | 308,446
Cost |  |
Disclosure Of Contract Costs [Line Items] |  |
Transition costs | 610,971 | 549,848
Incentives | 51,045 | 52,331
Contract assets | 662,016 | 602,179
Accumulated amortization and impairment |  |
Disclosure Of Contract Costs [Line Items] |  |
Transition costs | 274,243 | 250,847
Incentives | 43,744 | 42,886
Contract assets | $ 317,987 | $ 293,733

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