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Financial Instruments and Financial Risk Management - Summary of Derivatives Not Designated as Hedging Instruments and Embedded Derivatives (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about financial instruments [line items] |  |
Settlement pricing adjustments | $ 323 | $ 109
Swap contract | Zinc |  |
Disclosure of detailed information about financial instruments [line items] |  |
Settlement pricing adjustments | 17 | 12
Swap contract | Lead |  |
Disclosure of detailed information about financial instruments [line items] |  |
Settlement pricing adjustments | 4 | (5)
Settlement receivables and payables (Note 8) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Settlement pricing adjustments | 442 | 47
Embedded Derivatives | Zinc |  |
Disclosure of detailed information about financial instruments [line items] |  |
Settlement pricing adjustments | (28) | (1)
Embedded Derivatives | Gold |  |
Disclosure of detailed information about financial instruments [line items] |  |
Settlement pricing adjustments | (8) | 28
Embedded Derivatives | Silver |  |
Disclosure of detailed information about financial instruments [line items] |  |
Settlement pricing adjustments | (7) | 28
Variable consideration |  |
Disclosure of detailed information about financial instruments [line items] |  |
Settlement pricing adjustments | $ (97) | $ 0

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- Definition The gains (losses) on financial assets at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 20 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_20_a_i&doctype=Standard -URIDate 2021-03-24 + Details
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