Income taxes - Reconciliation of effective income tax rate from the combined federal and provincial Canadian statutory tax rate (Details) |
12 Months Ended | |
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Sep. 30, 2025 |
Sep. 30, 2024 |
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| Income Taxes [Abstract] | ||
| Company's statutory tax rate | 26.50% | 26.50% |
| Effect of foreign tax rate differences | (0.70%) | (0.30%) |
| Final determination from agreements with tax authorities and expirations of statutes of limitations | (0.40%) | (0.30%) |
| Non-deductible and tax exempt items | 0.50% | 0.30% |
| Recognition of previously unrecognized temporary differences | 0.00% | (0.30%) |
| Minimum income tax charge | 0.20% | 0.20% |
| Changes in tax laws and rates | (0.10%) | 0.00% |
| Effective income tax rate | 26.00% | 26.10% |
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- Definition Income Taxes [Abstract] No definition available.
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- Definition Tax Rate Effect Of Expense Not Deductible In Determining Taxable Profit (Loss) And Revenues Exempt From Taxation No definition available.
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- Definition Tax Rate Effect Of Expense Not Deductible In Determining Taxable Profit (Tax Loss), Regulatory Settlements No definition available.
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- Definition Tax Rate Effect Of Minimum Tax Charge No definition available.
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- Definition Tax Rate Effect Of Recognition Of Previously Unrecognized Temporary Differences No definition available.
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- Definition The applicable income tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The tax expense (income) divided by the accounting profit. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from a change in tax rate. [Refer: Average effective tax rate; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the application of foreign tax rates. [Refer: Average effective tax rate; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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