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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, 2017
Disclosure of detailed information about revenue by geographic region [Text Block] | The following table shows net sales by geographic region based on the final destination port:
|  | For the year ended |  | For the year ended |  | For the year ended |
|  | December 31, 2017 |  | December 31, 2016 |  | December 31, 2015 |
|  | US$(000) |  | US$(000) |  | US$(000) |
Asia |  |  | 2,416,826 |  |  | 1,865,346 |  |  | 770,272 |
Europe |  |  | 314,092 |  |  | 161,844 |  |  | 65,648 |
North America |  |  | 287,174 |  |  | 213,002 |  |  | 79,244 |
South America (primarily Peru) |  |  | 193,174 |  |  | 150,648 |  |  | 204,206 |
|  |  | 3,211,266 |  |  | 2,390,840 |  |  | 1,119,370 |
Less: Royalty contributions (see Note 2(k)) |  |  | (8,335) |  |  | (6,686) |  |  | (3,753) |
Total net sales |  |  | 3,202,931 |  |  | 2,384,154 |  |  | 1,115,617 |
Disclosure of detailed information about revenue by type of products [Text Block] | This item is made up as follows:
|  |  | For the year ended |  | For the year ended |  | For the year ended |
|  |  | December 31, 2017 |  | December 31, 2016 |  | December 31, 2015 |
|  |  | Pounds(000) |  | US$(000) |  | Pounds(000) | US$(000) |  | Pounds(000) |  | US$(000) |
Copper in concentrate |  |  | 979,243 |  |  | 2,702,508 |  |  | 995,386 |  |  | 1,967,052 |  |  | 440,071 |  |  | 794,197 |
Copper cathode |  |  | 84,679 |  |  | 241,725 |  |  | 109,128 |  |  | 247,431 |  |  | 104,279 |  |  | 259,830 |
Other (primarily silver and molybdenum concentrate) |  |  |  |  |  | 267,033 |  |  |  |  |  | 176,357 |  |  |  |  |  | 65,343 |
Subtotal Sales |  |  |  |  |  | 3,211,266 |  |  |  |  |  | 2,390,840 |  |  |  |  |  | 1,119,370 |
Less: Royalty contributions (see Note 2(k)) |  |  |  |  |  | (8,335) |  |  |  |  |  | (6,686) |  |  |  |  |  | (3,753) |
Total net sales |  |  |  |  |  | 3,202,931 |  |  |  |  |  | 2,384,154 |  |  |  |  |  | 1,115,617 |

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