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Financial Expenses (Tables) | 12 Months Ended
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Dec. 31, 2018
Sociedad Minera Cerro Verde S.A.A. [Member] |
Disclosure Of Financial Expenses [Line Items] |
Disclosure detailed information about financial expenses [Text Block] | 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 |
|  | US$(000) |  |  | US$(000) |  |  | US$(000) |
Interest on mining royalties (a) |  |  | 370,159 |  |  |  | 144,815 |  |  |  | - |
Interest on senior unsecured credit facility (Note 10(a)) |  |  | 49,551 |  |  |  | 44,678 |  |  |  | 51,155 |
Other financial expenses |  |  | 6,492 |  |  |  | 10,934 |  |  |  | 1,880 |
Amortization debt issuance cost |  |  | 2,419 |  |  |  | 4,479 |  |  |  | 8,901 |
Extinguishment debt - debt issuance cost |  |  | 1,902 |  |  |  | 6,266 |  |  |  | - |
Interest on shareholder loans |  |  | - |  |  |  | 7,992 |  |  |  | 19,836 |
Capitalized Interest |  |  | (3,790 | ) |  |  | (2,252 | ) |  |  | (1,334 | )
|  |  | 426,733 |  |  |  | 216,912 |  |  |  | 80,438 |

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