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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, 2023 | Dec. 31, 2022
Reconciliation Of Changes In Derivative Financial Assets (Liabilities), Net [Roll Forward] |  |
Derivative financial asset (liability), net | $ 6 | $ 55
Net change in fair value of outstanding derivatives financial instruments recognized in: Risk management activities | 3 | 70
Net change in fair value of outstanding derivatives financial instruments recognized in: Foreign exchange | 0 | (119)
Derivative financial asset, net | 9 | 6
Asset (liability), included in current portion of other long-term (liabilities) assets | 8 | 0
Asset, included in other long-term assets | $ 1 | $ 6

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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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Balance Type: | debit
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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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