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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, 2024 USD ($) | Dec. 31, 2024 CAD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 CAD ($)
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings at beginning of period | $ 4,940 | $ 6,534 | $ 5,292 | $ 7,167
Non-cash changes |  |  |  |
Finance fees, discount amortization and other | 27 | 11 | 8 | 11
Changes in foreign exchange rates | 0 | 458 | 0 | (164)
Borrowings at end of period | 3,149 | 4,531 | 4,940 | 6,534
SSM/SC | Quebrada Blanca Phase 2 project facility |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings at beginning of period | 2,644 | 3,497 | 1,683 | 2,279
Cash flows |  |  |  |
Advances | 471 | 652 | 960 | 1,292
Non-cash changes |  |  |  |
Finance fees, discount amortization and other | 1 | 1 | 1 | 1
Changes in foreign exchange rates | 0 | 333 | 0 | (75)
Borrowings at end of period | $ 3,116 | $ 4,483 | $ 2,644 | $ 3,497

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