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Other non-financial assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Sociedad Minera Cerro Verde S.A.A. [Member] |
Disclosure of other non financial assets [Line Items] |
Disclosure of detailed information about other non financial assets [Table Text Block] | This item is made up as follows:
|  | December 31 , 2018 |  |  | December 31 , 2017 |
|  | US$(000) |  |  | US$(000) |
Current |  |  |  |  |  |  |  |
Value added tax (VAT) credit |  |  | 28,081 |  |  |  | 18,153 |
Income tax prepayments (a) |  |  | 26,794 |  |  |  | - |
Other taxes to be recovered |  |  | 2,700 |  |  |  | 2,929 |
|  |  | 57,575 |  |  |  | 21,082 |
Non-current |  |  |  |  |  |  |  |
Other receivables (b) |  |  | 183,208 |  |  |  | 184,802 |
Income tax prepayments (a) |  |  | 16,858 |  |  |  | 4,212 |
|  |  | 200,066 |  |  |  | 189,014 |
Total other non-financial assets |  |  | 257,641 |  |  |  | 210,096 |
| (a) | Represents disbursements made by the Company for the prepayment of income tax, which the Company expects to use to offset future tax obligations or will be refunded to the Company by SUNAT (Superintendencia Nacional de Administración Tributaria) (see Note 13(b)).
| (b) | Represents disbursement made by the Company in connection with disputed tax assessments related to reviews by SUNAT from years 2003 to 2011 (see Note 13(c) and 13(e)). According to current tax procedures and the timeframe for resolving these types of claims, management and its legal advisors expect resolution of this matter will be favorable to the Company and amounts will be recoverable.

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