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v3.23.1

Pension and other post-retirement benefits (Narrative) (Details) - CAD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
2023 [Member] |  |
Disclosure of fair value of plan [line items] |  |
Contributions and fees payable | $ 1,675,000 |
Pension Plans [member] |  |
Disclosure of fair value of plan [line items] |  |
Weighted Average Length Of Time Of Defined Benefit Obligation | 17 years 1 month 6 days | 20 years
Pension Plans [member] | Increase of one year in the expected lifetime [member] |  |
Disclosure of fair value of plan [line items] |  |
Change in defined benefit obligations due to increase in actuarial assumption | $ 1,236,000 |
Other Benefit Plans [Member] |  |
Disclosure of fair value of plan [line items] |  |
Weighted Average Length Of Time Of Defined Benefit Obligation | 11 years 3 months 18 days | 13 years 7 months 6 days

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- Definition The length of time during which the defined and other benefit plans are active, in PnYnMn format. + References No definition available. + 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 estimate of the expected contributions to be made to a defined benefit plan for the next annual reporting period. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 147 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_147_b&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 148 -Subparagraph d -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_148_d_iii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_145_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Details
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- Details
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