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Income Taxes - Additional Information (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Disclosure of Income Taxes [line items] |  |
Unrecognized deferred tax assets | $ 57 | $ 299
Unrecognized deferred tax liabilities | 836 | 858
Deferred income taxes | $ (620) | 898
Antamina |  |
Disclosure of Income Taxes [line items] |  |
Proportion of ownership interest in joint operation | 22.50% |
Chilean Mining Royalty Reform |  |
Disclosure of Income Taxes [line items] |  |
Deferred income taxes | $ 106 |
Canada | Net Operating Loss |  |
Disclosure of Income Taxes [line items] |  |
Unused tax losses | 282 | 166
Chile | Net Operating Loss |  |
Disclosure of Income Taxes [line items] |  |
Unused tax losses | $ 1,890 | 1,220
Quintette |  |
Disclosure of Income Taxes [line items] |  |
Unrecognized deferred tax assets |  | $ 248

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- Definition The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2023-01-01 -Paragraph 81 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2023-en-r&anchor=para_81_e&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of unused tax credits for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax credits [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2023-01-01 -Paragraph 81 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2023-en-r&anchor=para_81_e&doctype=Standard -URIDate 2023-03-23 + Details
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