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Financial instruments and related risk management (Derivatives) (Details) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items] |  |
Net | $ (143,506) | $ 6,123
Gain (loss) | (183,103) | 37,791
Current portion of other liabilities [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Net | (83,890) | (14,338)
Other liabilities [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Net | (59,719) | (8,006)
Current portion of long-term receivables, investments and other [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Net | 68 | 9,137
Long-term receivables, investments and other [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Net | 35 | 19,330
Foreign currency contracts [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Net | (140,334) | 11,942
Gain (loss) | (182,988) | 38,975
Interest rate contracts [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Net | (3,172) | (5,819)
Gain (loss) | $ (115) | $ (1,184)

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- Definition The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 85 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_85&doctype=Standard -URIDate 2024-03-27 + Details
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