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Asset and Goodwill Impairment Testing - Summary of Pre-tax Impairment Reversal and (Asset Impairments) Recorded in Statement of Income (Detail) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Disclosure of impairment loss and reversal of impairment loss [line items] |  |
Asset impairments | $ 0 | $ 215
Carmen de Andacollo CGU |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |
Asset impairments | $ 0 | $ 215

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- Definition The amount of impairment loss or reversal of impairment loss recognised in profit or loss. [Refer: Impairment loss recognised in profit or loss; Reversal of impairment loss recognised in profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 99 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_99&doctype=Standard -URIDate 2022-03-24 + Details
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