QB2 Advances from SMM/SC - Narrative (Details)	Dec. 31, 2020 USD ($)
Quebrada Blanca Phase 2 project facility \| SSM/SC
Disclosure of detailed information about borrowings [line items]
Maximum borrowing capacity	$ 1,300,000,000

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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