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Stock-Based Compensation Plans - Additional Information (Detail) $ / shares in Units, shares in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 CAD ($) shares plan $ / shares | Dec. 31, 2023 CAD ($) shares $ / shares
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Employee Long-Term Incentives | $ | $ 132,000,000 | $ 284,000,000
Number of deferred share unit plans | plan | 2 |
Minimum |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Vesting multiplier, percent | 0.00% |
Maximum |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Vesting multiplier, percent | 200.00% |
Net settlement rights |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Weighted average unit fair value of granted | $ | $ 5.20 |
Weighted average exercise price, exercised (in dollars per share) | $ / shares | $ 10.77 |
Weighted average exercise price, exercised (in CAD per share) | $ / shares | $ 11.97 |
Number of other equity instruments exercised or vested in share-based payment arrangement, settled for common shares (in shares) | shares | 793 |
Common shares issued in exercise of other equity instruments (in shares) | shares | 562 |
Outstanding number (in shares) | shares | 8,653 | 11,895
Weighted average remaining contractual life of outstanding share options (in years) | 4 years 21 days |
Weighted average exercise price of share options outstanding in share-based payment arrangement (in dollars per share) | $ / shares | $ 17.83 | $ 13.66
Cenovus Replacement Stock Options |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Employee Long-Term Incentives | $ | $ 5,000,000 | $ 12,000,000
Outstanding number (in shares) | shares | 348 | 1,005
Weighted average exercise price of share options outstanding in share-based payment arrangement (in dollars per share) | $ / shares | $ 3.54 | $ 6.49
Cenovus Replacement Stock Options | 3.00 to 4.99 |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Outstanding number (in shares) | shares | 348 |
Weighted average remaining contractual life of outstanding share options (in years) | 5 months 19 days |
Weighted average exercise price of share options outstanding in share-based payment arrangement (in dollars per share) | $ / shares | $ 3.54 |
Cenovus Replacement Stock Options | Settled for cash |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Weighted average exercise price, exercised (in dollars per share) | $ / shares | $ 7.34 |
Number of other equity instruments exercised or vested in share-based payment arrangement, settled for cash | shares | 577 |
Weighted average exercise price, exercised (in CAD per share) | $ / shares | $ 7.48 |
Cenovus Replacement Stock Options | Settled for common shares |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Number of other equity instruments exercised or vested in share-based payment arrangement, settled for common shares (in shares) | shares | 37 |
Weighted average exercise price of other equity instruments exercised or vested in share-based payment arrangement, settled for common shares (in CAD per share) | $ / shares | $ 5.17 |
Common shares issued in exercise of other equity instruments (in shares) | shares | 29 |
PSUs |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Employee Long-Term Incentives | $ | $ 80,000,000 | $ 238,000,000
Award vesting term | 3 years |
Intrinsic value of vested | $ | $ 0 |
RSUs |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Employee Long-Term Incentives | $ | $ 105,000,000 | 97,000,000
Award vesting term | 3 years |
Intrinsic value of vested | $ | $ 0 |
DSUs Option One |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Percentage of annual bonus award to convert into DSUs | 0.00% |
DSUs Option Two |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Percentage of annual bonus award to convert into DSUs | 25.00% |
DSUs Option Three |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Percentage of annual bonus award to convert into DSUs | 50.00% |
DSUs Option Four |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Percentage of annual bonus award to convert into DSUs | 75.00% |
Deferred Share Units Option Five |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Percentage of annual bonus award to convert into DSUs | 100.00% |
DSUs |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Employee Long-Term Incentives | $ | $ 38,000,000 | $ 37,000,000
Deferred Income Tax Assets to be Settled After More Than Twelve Months |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Percentage of options exercisable | 30.00% |
Term of share options in sharebased payment arrangement | 1 year |
3 Years |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Percentage of options exercisable | 30.00% |
Term of share options in sharebased payment arrangement | 2 years |
4 Years |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Term of share options in sharebased payment arrangement | 3 years |
Later than seven years and not later than ten years |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Term of share options in sharebased payment arrangement | 7 years |

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