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Financial Instruments - Estimated Fair Values of Derivative Financial Instruments Included in Risk Management Asset (Details) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Reconciliation Of Changes In Derivative Financial Assets (Liabilities), Net [Roll Forward] |  |
Derivative financial asset (liability), net, beginning balance | $ 9 | $ 6
Risk management activities | (6) | 3
Foreign exchange | 1 | 0
Other comprehensive income | 1 | 0
Derivative financial asset (liability), net, ending balance | 5 | 9
Less: current portion | 5 | 8
Asset, included in other long-term assets | $ 0 | $ 1

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- Definition Current Derivative Financial Assets (Liabilities) + References No definition available. + Details
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- Definition Derivative Financial Assets (Liabilities), Net + References No definition available. + Details
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- Definition Gain (Losses) On Change In Fair Value Of Unsettled Derivatives, Including Fair Value Movement Of Commodity Financial Instruments + References No definition available. + Details
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- Definition Gains (Losses) On Exchange Differences On Translation Recognised In Profit Or Loss, Settled And Unsettled Derivative Hedging Instruments + References No definition available. + Details
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- Definition Non-Current Derivative Financial Assets (Liabilities) + References No definition available. + Details
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- Definition Reconciliation Of Changes In Derivative Financial Assets (Liabilities), Net [Roll Forward] + References No definition available. + Details
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- Definition The gains (losses) recognised in other comprehensive income on cash flow hedges, before tax, before reclassification adjustments. [Refer: Cash flow hedges [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 91 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_91_b&doctype=Standard -URIDate 2024-03-27 + Details
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