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QB2 Advances from SMM/SC - Summary of Debt Continuity (Details) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 CAD ($)
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings at beginning of period | $ 5,816 | $ 7,374 | $ 4,913 | $ 6,255
Non-cash changes |  |  |  |
Finance fees, discount amortization and other | 12 | 15 | (16) | (20)
Changes in foreign exchange rates | 0 | 474 | 0 | (10)
Borrowings at end of period | 5,292 | 7,167 | 5,816 | 7,374
SSM/SC | Quebrada Blanca Phase 2 project facility |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings at beginning of period | 997 | 1,263 | 734 | 934
Cash flows |  |  |  |
Advances | 685 | 899 | 262 | 326
Non-cash changes |  |  |  |
Finance fees, discount amortization and other | 1 | 1 | 1 | 1
Changes in foreign exchange rates | 0 | 116 | 0 | 2
Borrowings at end of period | $ 1,683 | $ 2,279 | $ 997 | $ 1,263

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