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Contingent Payments - Summary of Contingent Payment (Detail) - Sunrise Oil Sands Partnership - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of contingent liabilities in business combination [line items] |  |
Contingent Payments, Beginning of Year | $ 164 | $ 419
Liabilities Settled or Payable | (194) | (314)
Re-measurement | 30 | 59
Contingent Payments, End of Year | $ 0 | $ 164

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- Definition The amount of contingent liabilities recognised in a business combination. [Refer: Classes of contingent liabilities [domain]; Total for all business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2024-01-01 -Paragraph B67 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B67_c&doctype=Appendix&subtype=B -URIDate 2024-03-27 + Details
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- Definition The amount of contingent liabilities recognised in a business combination that were settled. [Refer: Contingent liabilities recognised in business combination] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2024-01-01 -Paragraph B67 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B67_c&doctype=Appendix&subtype=B -URIDate 2024-03-27 + Details
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