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Contingent Payments - Summary of Contingent Payment (Detail) - Sunrise Oil Sands Partnership - CAD ($) $ in Millions	12 Months Ended
	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

X

- Definition

Re-measurement of contingent payments.

+ References

No definition available.

+ Details

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X

- 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

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

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X

- Definition

The amount of contingent liabilities recognised in a business combination that were settled. [Refer: Contingent liabilities recognised in business combination]

+ References

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-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

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