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Summary of Significant Accounting Policies - Additional Information (Detail) |  | 12 Months Ended
--- | --- | ---
Oct. 26, 2022 | Dec. 31, 2022
NuevaUnión |  |
Disclosure of joint ventures [line items] |  |
Ownership interest in joint venture |  | 50.00%
Galore Creek Partnership |  |
Disclosure of joint ventures [line items] |  |
Ownership interest in joint operation |  | 50.00%
Fort Hills Energy Limited Partnership |  |
Disclosure of joint ventures [line items] |  |
Ownership interest in joint operation |  | 21.30%
Ownership interest in joint venture sale | 21.30% | 21.30%
Antamina |  |
Disclosure of joint ventures [line items] |  |
Ownership interest in joint operation |  | 22.50%

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