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Sales of goods (Tables) - Sociedad Minera Cerro Verde S.A.A. [Member] | 12 Months Ended
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Dec. 31, 2018
Disclosure of detailed information about revenue by geographic region [Text Block] |
| (b) | The following table shows net sales by geographic region based on the final destination port:
|  | For the year ended December 31, 2018 |  |  | For the year ended December 31, 2017 |  |  | For the year ended December 31, 2016 |
|  | US$(000) |  |  | US$(000) |  |  | US$(000) |
Asia |  |  | 2,404,530 |  |  |  | 2,416,826 |  |  |  | 1,865,346 |
North America |  |  | 295,448 |  |  |  | 287,174 |  |  |  | 213,002 |
Europe |  |  | 209,894 |  |  |  | 314,092 |  |  |  | 161,844 |
South America (primarily Peru) |  |  | 136,400 |  |  |  | 193,174 |  |  |  | 150,648 |
Central America |  |  | 15,658 |  |  |  | - |  |  |  | - |
|  |  | 3,061,930 |  |  |  | 3,211,266 |  |  |  | 2,390,840 |
Less: Royalty contributions (see Note 2(k)) |  |  | (7,904 | ) |  |  | (8,335 | ) |  |  | (6,686 | )
Total net sales |  |  | 3,054,026 |  |  |  | 3,202,931 |  |  |  | 2,384,154 |
Disclosure of detailed information about revenue by type of products [Text Block] |
| (a) | This item is made up as follows:
|  | For the year ended December 31, 2018 |  |  | For the year ended December 31, 2017 |  | For the year ended December 31, 2016 |
|  | Pounds (000) |  |  | US$(000) |  |  | Pounds (000) |  |  | US$(000) |  |  | Pounds (000) |  |  | US$(000) |
Copper in concentrate |  |  | 962,113 |  |  |  | 2,458,088 |  |  |  | 979,243 |  |  |  | 2,702,508 |  |  |  | 995,386 |  |  |  | 1,967,052 |
Copper cathode |  |  | 86,346 |  |  |  | 251,908 |  |  |  | 84,679 |  |  |  | 241,725 |  |  |  | 109,128 |  |  |  | 247,431 |
Other (primarily silver and molybdenum concentrate) |  |  |  |  |  |  | 351,934 |  |  |  |  |  |  |  | 267,033 |  |  |  |  |  |  |  | 176,357 |
Subtotal Sales |  |  |  |  |  |  | 3,061,930 |  |  |  |  |  |  |  | 3,211,266 |  |  |  |  |  |  |  | 2,390,840 |
Less: Royalty contributions (see Note 2(k)) |  |  |  |  |  |  | (7,904 | ) |  |  |  |  |  |  | (8,335 | ) |  |  |  |  |  |  | (6,686 | )
Total net sales |  |  |  |  |  |  | 3,054,026 |  |  |  |  |  |  |  | 3,202,931 |  |  |  |  |  |  |  | 2,384,154 |

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