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Share-based compensation plans (Equity-settled and cash-settled) (Details) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expenses under equity settled plans	$ 11,656	$ 8,152
Expenses (recoveries) under cash-settled plans	37,201	59,225
Performance Share Unit Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expenses (recoveries) under cash-settled plans	13,249	22,013
Restricted Share Unit Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expenses under equity settled plans	6,775	3,692
Expenses (recoveries) under cash-settled plans	13,125	19,045
Employee Share Ownership Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expenses under equity settled plans	4,881	4,460
Deferred Share Unit Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expenses (recoveries) under cash-settled plans	9,221	15,447
Phantom Stock Option Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expenses (recoveries) under cash-settled plans	743	1,908
Phantom Restricted Share Unit Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expenses (recoveries) under cash-settled plans	$ 863	$ 812

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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 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

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X

- 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 2024-01-01
-Paragraph 51
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_51_a&doctype=Standard
-URIDate 2024-03-27

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