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Other Long-Term Liabilities - Share-Based Compensation (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Reconciliation Of Changes In Liabilities From Share-Based Payment Transactions [Roll Forward] |  |  |
Balance – beginning of year | $ 780 | $ 832 | $ 489
Share-based compensation expense | 279 | 491 | 804
Cash payment for stock options surrendered and PSUs vested | (84) | (110) | (79)
Transferred to common shares | (358) | (435) | (387)
Other | 3 | 2 | 5
Balance – end of year | 620 | 780 | 832
Liabilities from share-based payment transactions | 620 | 780 | 832
Less: current portion | 463 | 538 | 559
Non-current liabilities from share-based payment arrangements | $ 157 | $ 242 | $ 273

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- Definition Current Liabilities From Share-Based Payment Arrangements + References No definition available. + Details
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- Definition Liabilities From Share-Based Payment Transactions, Transferred To Common Shares Through Exercise Of Options + References No definition available. + Details
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- Definition Non-Current Liabilities From Share-Based Payment Transactions + References No definition available. + Details
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- Definition Other Liabilities From Share-Based Payment Transactions + References No definition available. + Details
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- Definition Reconciliation Of Changes In Liabilities From Share-Based Payment Transactions [Roll Forward] + References No definition available. + Details
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- Definition The amount of expense from share-based payment transactions with employees. [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 + Details
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- Definition The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Types of share-based payment arrangements [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2024-01-01 -Paragraph 51 -Subparagraph b -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_51_b_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The cash outflow for payments for equity instruments that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2024-01-01 -Paragraph 17 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_17&doctype=Standard -URIDate 2024-03-27 + Details
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