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Contingent Payments - Additional Information (Detail) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Aug. 31, 2024 | Dec. 31, 2024 CAD ($) | Aug. 31, 2022 CAD ($) $ / bbl
Disclosure of contingent liabilities in business combination [line items] |  |  |
Proportion of ownership interest in joint operation |  | 100.00% |
BP Canada |  |  |
Disclosure of contingent liabilities in business combination [line items] |  |  |
Proportion of ownership interest in joint operation | 50.00% |  |
Contingent consideration, quarterly payment | $ |  |  | $ 2.8
BP Canada | Major business combination |  |  |
Disclosure of contingent liabilities in business combination [line items] |  |  |
Settled liabilities, contingent liabilities recognised in business combination | $ |  | $ 301.0 |
BP Canada | Bottom of range |  |  |
Disclosure of contingent liabilities in business combination [line items] |  |  |
Contingent consideration, price per barrel (in dollars per share) | $ / bbl |  |  | 52.00
BP Canada | Top of range |  |  |
Disclosure of contingent liabilities in business combination [line items] |  |  |
Contingent consideration, price per barrel (in dollars per share) | $ / bbl |  |  | 53.00

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