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Exploration and Evaluation Assets - Detailed Information about Exploration and Evaluation Assets (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | $ 2,208 | $ 2,226
Additions/Acquisitions |  | 48
Additions, net | 108 |
Acquisition of Chevron's assets | 320 |
Transfers to property, plant and equipment | (52) | (63)
Derecognitions and other | (62) | (2)
Foreign exchange adjustments | 4 | (1)
Ending balance | 2,526 | 2,208
Exploration and evaluation assets derecognized through depletion, depreciation and amortization expense | 62 |
North America |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 2,031 | 2,026
Additions/Acquisitions |  | 45
Additions, net | 102 |
Acquisition of Chevron's assets | 320 |
Transfers to property, plant and equipment | (45) | (38)
Derecognitions and other | 0 | (2)
Foreign exchange adjustments | 0 | 0
Ending balance | 2,408 | 2,031
North Sea |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 0 | 0
Additions/Acquisitions |  | 0
Additions, net | 0 |
Acquisition of Chevron's assets | 0 |
Transfers to property, plant and equipment | 0 | 0
Derecognitions and other | 0 | 0
Foreign exchange adjustments | 0 | 0
Ending balance | 0 | 0
Offshore Africa |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 100 | 98
Additions/Acquisitions |  | 3
Additions, net | 6 |
Acquisition of Chevron's assets | 0 |
Transfers to property, plant and equipment | 0 | 0
Derecognitions and other | (62) | 0
Foreign exchange adjustments | 4 | (1)
Ending balance | 48 | 100
Oil Sands Mining and Upgrading |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 77 | 102
Additions/Acquisitions |  | 0
Additions, net | 0 |
Acquisition of Chevron's assets | 0 |
Transfers to property, plant and equipment | (7) | (25)
Derecognitions and other | 0 | 0
Foreign exchange adjustments | 0 | 0
Ending balance | $ 70 | $ 77

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- Definition The amount of assets arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2024-01-01 -Paragraph 24 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2024-en-r&anchor=para_24_b&doctype=Standard -URIDate 2024-03-27 + Details
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