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Employee benefits - Fair value of plan assets (Details) - CAD ($) $ in Thousands | Sep. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Disclosure of fair value of plan assets [line items] |  |
Quoted equities | $ 205,130 | $ 196,611
Quoted bonds | 139,584 | 102,658
Cash | 5,642 | 143,377
Other | 261,755 | 199,323
Plan assets | 612,111 | 641,969
U.K. |  |
Disclosure of fair value of plan assets [line items] |  |
Quoted equities | 205,130 | 196,611
Quoted bonds | 139,584 | 102,658
Cash | 5,566 | 143,312
Other | 185,946 | 129,328
Plan assets | 536,226 | 571,909
Germany |  |
Disclosure of fair value of plan assets [line items] |  |
Quoted equities | 0 | 0
Quoted bonds | 0 | 0
Cash | 0 | 0
Other | 11,747 | 11,028
Plan assets | 11,747 | 11,028
Other |  |
Disclosure of fair value of plan assets [line items] |  |
Quoted equities | 0 | 0
Quoted bonds | 0 | 0
Cash | 76 | 65
Other | 64,062 | 58,967
Plan assets | $ 64,138 | $ 59,032

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- Definition The amount cash and cash equivalents contribute to the fair value of defined benefit plan assets. [Refer: Cash and cash equivalents; Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 142 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_142_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount instruments representing debt (rather than equity) contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 142 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_142_c&doctype=Standard -URIDate 2023-03-23 + Details
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- 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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- Definition The amount instruments representing equity (rather than debt) contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 142 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_142_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount other types of assets not separately disclosed contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 142 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_142&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_57_a&doctype=Standard -URIDate 2023-03-23 + Details
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