XML 166 R152.htm IDEA: XBRL DOCUMENT
v3.19.1

Mining concessions, development costs, property, plant and equipment, net (Details Textual) | 12 Months Ended
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Dec. 31, 2018 USD ($) MT | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |  |  |
Pre-tax discount rate applied to the pre-tax cash flows | 7.29% |  |
Capitalized finance costs |  | $ 5,800,000 |
Average rate used to determine the financial cost to be capitalized | 4.19% |  |
Reversal of impairment loss | $ 0 | (11,770,000) | $ 0
Stripping activity asset of ore | MT | 5.5 |  |
Stripping activity asset of waste | MT | 9.2 |  |
El Brocal [Member] |  |  |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |  |  |
Pre-tax discount rate applied to the pre-tax cash flows | 13.32% |  |
Buenaventura [Member] |  |  |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |  |  |
Pre-tax discount rate applied to the pre-tax cash flows | 7.83% |  |
Mining activities [Member] |  |  |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |  |  |
Reversal of impairment loss |  | 11,800,000 |
Mining activities [Member] | Breapampa [Member] |  |  |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |  |  |
Reversal of impairment loss | $ 7,400,000 |  |
Mining activities [Member] | Recuperada [Member] |  |  |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |  |  |
Reversal of impairment loss | 7,100,000 |  |
Mining activities [Member] | Shila Paula [Member] |  |  |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |  |  |
Reversal of impairment loss | 2,700,000 |  |
La Zanja mining unit [Member] |  |  |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |  |  |
Reversal of impairment loss recognised in profit or loss, property, plant and equipment | 5,693,000 | $ 21,620,000 |
Shila-Paula mining unit [Member] |  |  |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |  |  |
Reversal of impairment loss recognised in profit or loss, property, plant and equipment | $ 2,800,000 |  |

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