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Employee benefits - Fair value of plan assets (Details) - CAD ($) $ in Thousands | Sep. 30, 2022 | Sep. 30, 2021
--- | --- | ---
Disclosure of fair value of plan assets [line items] |  |
Quoted equities | $ 196,611 | $ 426,066
Quoted bonds | 102,658 | 109,787
Cash | 143,377 | 37,038
Other | 173,907 | 463,403
Plan assets | 616,553 | 1,036,294
U.K. |  |
Disclosure of fair value of plan assets [line items] |  |
Quoted equities | 196,611 | 426,066
Quoted bonds | 102,658 | 109,787
Cash | 143,312 | 36,974
Other | 129,328 | 413,532
Plan assets | 571,909 | 986,359
France |  |
Disclosure of fair value of plan assets [line items] |  |
Quoted equities | 0 | 0
Quoted bonds | 0 | 0
Cash | 0 | 0
Other | 0 | 661
Plan assets | 0 | 661
Germany |  |
Disclosure of fair value of plan assets [line items] |  |
Quoted equities | 0 | 0
Quoted bonds | 0 | 0
Cash | 0 | 0
Other | 11,028 | 12,234
Plan assets | 11,028 | 12,234
Other |  |
Disclosure of fair value of plan assets [line items] |  |
Quoted equities | 0 | 0
Quoted bonds | 0 | 0
Cash | 65 | 64
Other | 33,551 | 36,976
Plan assets | $ 33,616 | $ 37,040

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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 2021-01-01 -Paragraph 142 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_142_a&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 142 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_142_c&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 142 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_142_b&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 142 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_142&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_57_a&doctype=Standard -URIDate 2021-03-24 + Details
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