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Share-based payments - Deferred share unit plan (Details) - shares	Sep. 30, 2025	Sep. 30, 2024
DSUs
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of outstanding DSUs (in shares)	99,938	110,412

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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X

- Definition

The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2025-01-01
-Paragraph 45
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_45&doctype=Standard
-URIDate 2025-03-27

+ Details

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Period Type:	instant

X

- Details

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Balance Type:
Period Type: