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Financial Instruments - Reconciliation of Changes in the Fair Value of Cenovus's Risk Management Assets and Liabilities (Detail) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Disclosure of detailed information about financial instruments [abstract] |  |
Fair Value of Contracts, Beginning of Year | $ 46 | $ (68)
Change in Fair Value of Contracts in Place at Beginning of Year | 0 | (5)
Change in Fair Value of Contracts Entered Into During the Year | (45) | (1,641)
Fair Value of Contracts Realized During the Year | 9 | 1,762
Unrealized Foreign Exchange Gain (Loss) on U.S. Dollar Contracts | 2 | (2)
Fair Value of Contracts, End of Year | $ 12 | $ 46

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- Definition Change in fair value of derivative financial instruments from foreign exchange. + References No definition available. + Details
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- Definition Fair value of derivative financial instruments net. + References No definition available. + Details
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- Definition Gains Losses On Change In Fair Value of Contracts Entered During Year + References No definition available. + Details
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- Definition Gains losses on change in fair value of contracts. + References No definition available. + Details
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- Definition Settlements fair value measurement assets liabilities including discontinued operations. + References No definition available. + Details
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- References No definition available. + Details
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