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Exploration and Evaluation Assets, Net - Summary of Exploration and Valuation Assets, Net (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure Of Exploration And Evaluation Assets [Line Items] |  |
Beginning Balance | $ 738 |
Write-downs | (69) | $ (42)
Ending Balance | 484 | 738
E&E Asset |  |
Disclosure Of Exploration And Evaluation Assets [Line Items] |  |
Beginning Balance | 738 | 685
Acquisition | 7 | 31
Additions | 65 | 84
Transfer to PP&E (Note 16) | (285) | (60)
Write-downs | (37) | (29)
Change in Decommissioning Liabilities | (5) | 28
Exchange Rate Movements and Other | 1 | (1)
Ending Balance | $ 484 | $ 738

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- Definition Increase decrease in exploration and evaluation assets from changes in provision for decommissioning restoration and rehabilitation costs. + References No definition available. + Details
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- Definition The amount of expense 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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- Definition The amount of exploration and evaluation assets recognised as intangible assets in accordance with the entity's accounting policy. [Refer: Exploration and evaluation assets [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2024-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2024-en-r&anchor=para_25&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2024-01-01 -Paragraph 119 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_119&doctype=Standard -URIDate 2024-03-27 + Details
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