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v3.23.1

Share-based compensation plans (Equity-settled and cash-settled) (Details) - CAD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses under equity settled plans | $ 6,859,000 | $ 7,837,000
Expenses (recoveries) under cash-settled plans | 24,369,000 | 41,839,000
Stock Option Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses under equity settled plans | 45,000 | 366,000
Performance Share Unit Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses under equity settled plans | 0 | 1,237,000
Expenses (recoveries) under cash-settled plans | 11,221,000 | 25,784,000
Restricted Share Unit Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses under equity settled plans | 3,273,000 | 2,933,000
Expenses (recoveries) under cash-settled plans | 9,342,000 | 6,890,000
Employee Share Ownership Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses under equity settled plans | 3,541,000 | 3,301,000
Deferred Share Unit Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses (recoveries) under cash-settled plans | 2,811,000 | 6,741,000
Phantom Stock Option Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses (recoveries) under cash-settled plans | 751,000 | 2,261,000
Phantom Restricted Share Unit Plan [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Expenses (recoveries) under cash-settled plans | $ 244,000 | $ 163,000

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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 of expense arising from cash-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of expense arising from equity-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 51 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_51_a&doctype=Standard -URIDate 2021-03-24 + Details
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