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Related parties (Details) - Sociedad Minera Cerro Verde S.A.A. [Member] - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Balances receivable from related parties [Abstract] |  |  |
Amounts receivable, related party transactions |  | $ 594,409 | $ 453,070
Balances payable to related parties [Abstract] |  |  |
Total accounts payable, short term |  | 3,446 | 4,014
Accounts Receivables Non Provisional Pricing [Member] |  |  |
Balances receivable from related parties [Abstract] |  |  |
Amounts receivable, related party transactions |  | 116,740 | 121,995
Accounts Receivables Provisional Pricing [Member] |  |  |
Balances receivable from related parties [Abstract] |  |  |
Amounts receivable, related party transactions |  | 376,235 | 294,998
Freeport Minerals Corporation [Member] |  |  |
Balances receivable from related parties [Abstract] |  |  |
Amounts receivable, related party transactions | [1] | 462,304 | 401,211
Balances payable to related parties [Abstract] |  |  |
Amounts payable to related parties |  | 0 | 367
Sumitomo Metal Mining Company, Ltd. [Member] |  |  |
Balances receivable from related parties [Abstract] |  |  |
Amounts receivable, related party transactions | [2] | 16,352 | 10,760
Climax Molybdenum Marketing Corporation [Member] |  |  |
Balances receivable from related parties [Abstract] |  |  |
Amounts receivable, related party transactions | [3] | 14,319 | 5,022
Freeport-McMoRan Sales Company Inc. [Member] |  |  |
Balances payable to related parties [Abstract] |  |  |
Amounts payable to related parties |  | 2,883 | 3,086
Minera Freeport-McMoRan South America Ltda [Member] |  |  |
Balances payable to related parties [Abstract] |  |  |
Amounts payable to related parties |  | 402 | 561
Freeport Cobalt OY [Member] |  |  |
Balances payable to related parties [Abstract] |  |  |
Amounts payable to related parties |  | 161 | 0
Embedded derivatives [Member] |  |  |
Balances receivable from related parties [Abstract] |  |  |
Amounts receivable, related party transactions | [4] | $ 101,434 | $ 36,077
[1] | Accounts receivable from FMC mainly correspond to sales of copper concentrate and copper cathode. The Company has a long-term agreement with FMC through which it has committed to sell between 70% and 80% of its annual copper concentrate production through December 31, 2021. Terms of the contract are reviewed annually.
[2] | The Company has a long-term agreement with Sumitomo through which it has committed to sell 21% of its annual copper concentrate production through December 31, 2021. Terms of the contract are reviewed annually.
[3] | The Company has a new long-term agreement with Climax Molybdenum Marketing Corporation (a wholly owned subsidiary of FMC) through which it has committed to sell 100% of its annual molybdenum concentrate production, at a price based on MWDO and under a delivery type known as CIF (cost, insurance and freight) from February 1, 2020, through January 31, 2022.
[4] | Reflects the embedded derivative adjustment associated with accounts receivable from related parties (see Note 2(d) and 21).

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