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Financial Instruments and Financial Risk Management - Schedule of Effect of Change in Commodity Prices on Profit (Loss) (Detail) - Commodity Price Risk $ in Millions | 12 Months Ended
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Dec. 31, 2023 CAD ($) USD_per_LB | Dec. 31, 2022 CAD ($) USD_per_LB
Disclosure of commodity price risk for financial instruments [line items] |  |
Change in Profit Attributable to Shareholders | $ 34 | $ 35
Copper |  |
Disclosure of commodity price risk for financial instruments [line items] |  |
Price | USD_per_LB | 3.87 | 3.80
Change in Profit Attributable to Shareholders | $ 37 | $ 52
Zinc |  |
Disclosure of commodity price risk for financial instruments [line items] |  |
Price | USD_per_LB | 1.20 | 1.35
Change in Profit Attributable to Shareholders | $ (1) | $ 9
Steelmaking coal |  |
Disclosure of commodity price risk for financial instruments [line items] |  |
Change in Profit Attributable to Shareholders | $ 11 | $ 9

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- Definition Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Impact On Pre-Tax Earnings + References No definition available. + Details
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- Details
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- Details
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