Commitments and contingencies - Associates - Cerro Verde (Details) - Sociedad Minera Cerro Verde S.A.A. |
Jun. 23, 2004 |
|---|---|
| Minimum | |
| Disclosure of Commitments and contingencies [Line Items] | |
| Royalty rate on net sales | 1.00% |
| Maximum | |
| Disclosure of Commitments and contingencies [Line Items] | |
| Royalty rate on net sales | 3.00% |
| New guarantee contract | |
| Disclosure of Commitments and contingencies [Line Items] | |
| Royalty rate on net sales | 1.00% |
| New guarantee contract | Minimum | |
| Disclosure of Commitments and contingencies [Line Items] | |
| Royalty rate on net sales | 1.00% |
| New guarantee contract | Maximum | |
| Disclosure of Commitments and contingencies [Line Items] | |
| Royalty rate on net sales | 12.00% |