XML 122 R108.htm IDEA: XBRL DOCUMENT
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Identification and business activity (Details Textual) lb in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 22, 2017 USD ($) shares | Dec. 31, 2017 USD ($) lb bbl | Dec. 31, 2016 USD ($) lb | Dec. 31, 2015 USD ($) lb
Disclosure of identification and business activity [Line Items] |  |  |  |
Proceeds from sales of property, plant and equipment, classified as investing activities |  | $ 1,962,000 | $ 7,180,000 | $ 5,481,000
Assets |  | 4,332,813,000 | 4,266,415,000 | 4,547,181,000
Reversal of impairment loss |  | (11,770,000) | 0 | 0
Payments to acquire or redeem entity's shares |  | $ 0 | $ 1,210,000 | $ 0
Quecher Main project [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Average production capacity | bbl |  | 200,000 |  |
Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Volume of gold produced | lb |  | 530 | 660 | 920
Minera Yanacocha SRL and subsidiary [Member] | Treasury shares [member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Number of shares purchased | shares | 63,922,565 |  |  |
Payments to acquire or redeem entity's shares | $ 47,910,585 |  |  |
Percentage of stock purchased | 5.00% |  |  |
Newmont Second Capital Corporation [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 54.05% |  |
S.M.R.L. Chaupiloma Dos de Cajamarca [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Royalty rate on net sales |  | 3.00% |  |
Newmont Mining Corporation [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Cyprus Climax Metals [Member] | Sociedads Mineras Cerro Verde Saa [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 53.56% |  |
SMM Cerro Verde Netherlands B.V [Member] | Sociedads Mineras Cerro Verde Saa [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of ownership interests held by non-controlling interests |  | 21.00% |  |
Compania de Minas Buenaventura S.A.A. [Member] | Sociedads Mineras Cerro Verde Saa [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of ownership interests held by non-controlling interests |  | 19.58% |  |
other stakeholders [Member] | Sociedads Mineras Cerro Verde Saa [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of ownership interests held by non-controlling interests |  | 5.86% |  |
Mining activities [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Losses on disposals of non-current assets |  | $ 4,050,000 |  |
Reversal of impairment loss |  | $ 11,770,000 |  |
El Brocal [Member] | Mining activities [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of voting rights held in subsidiary |  | 61.42% | 61.32% |
El Brocal [Member] | Mining activities [Member] | Indirect [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of voting rights held in subsidiary |  | 58.24% | 58.24% |
Colquijirca S.A. [Member] | Mining activities [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of voting rights held in subsidiary |  | 99.99% | 99.99% |
Antapite [Member] | Mining activities [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proceeds from sales of property, plant and equipment, classified as investing activities |  |  | $ 1,003,000 |
Losses on disposals of non-current assets |  |  | $ 3,014,000 |
Compania Minera Condesa S.A. [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of ownership interests held by non-controlling interests |  | 45.95% |  |
Compania Minera Condesa S.A. [Member] | Mining activities [Member] | Indirect [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 0.00% | 0.00% |
Minas Buenaventura S.A.A [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proportion of ownership interest in subsidiary |  | 100.00% |  |
Breapampa [Member] | Mining activities [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proceeds from sales of property, plant and equipment, classified as investing activities |  | $ 2,000,000 |  |
Reversal of impairment loss |  | 7,400,000 |  |
Recuperada [Member] | Mining activities [Member] |  |  |  |
Disclosure of identification and business activity [Line Items] |  |  |  |
Proceeds from sales of property, plant and equipment, classified as investing activities |  | 600,000 |  |
Reversal of impairment loss |  | $ 7,100,000 |  |

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