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Leases - Schedule of Lease Assets (Details) - CAD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Disclosure of operating segments [line items] |  |  |
Lease assets | $ 1,394 | $ 1,458 | $ 1,447
Operating segments | North America |  |  |
Disclosure of operating segments [line items] |  |  |
Lease assets | 257 | 280 |
Operating segments | North Sea |  |  |
Disclosure of operating segments [line items] |  |  |
Lease assets | 25 | 18 |
Operating segments | Offshore Africa |  |  |
Disclosure of operating segments [line items] |  |  |
Lease assets | 93 | 119 |
Operating segments | Oil Sands Mining and Upgrading |  |  |
Disclosure of operating segments [line items] |  |  |
Lease assets | 932 | 1,001 |
Head Office |  |  |
Disclosure of operating segments [line items] |  |  |
Lease assets | $ 87 | $ 40 |

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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term that do not meet the definition of investment property. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_j&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_a&doctype=Standard -URIDate 2024-03-27 + Details
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