XML 102 R88.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Fair value measurement (Table) | 12 Months Ended
--- | ---
Dec. 31, 2017
Disclosure of fair value measurement [Abstract] |
Disclosure of fair value measurement of liabilities [text block] | The following table provides the fair value measurement hierarchy of the Group’s assets and liabilities:
|  |  |  | Fair value measurement using |
|  |  |  | Quoted prices |  | Quoted prices |  | Quoted prices |
|  |  |  | in active |  | in active |  | in active |
|  |  |  | markets |  | markets |  | markets |
|  | Total |  | (Level 1) |  | (Level 2) |  | (Level 3) |
|  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |
As of December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |
Assets and liabilities measured at fair value: |  |  |  |  |  |  |  |  |  |  |  |  |
- Embedded derivatives for concentrates sales, net |  |  | 7,424 |  |  | - |  |  | 7,424 |  |  | - |
- Contingent consideration liability |  |  | 17,570 |  |  | - |  |  | - |  |  | 17,570 |
- Hedge instruments |  |  | 28,705 |  |  | - |  |  | 28,705 |  |  | - |
As of December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities measured at fair value: |  |  |  |  |  |  |  |  |  |  |  |  |
- Embedded derivatives for concentrates sales, net |  |  | 1,524 |  |  | - |  |  | 1,524 |  |  | - |
- Contingent consideration liability |  |  | 19,343 |  |  | - |  |  | - |  |  | 19,343 |
- Hedge instruments |  |  | 3,863 |  |  | - |  |  | 3,863 |  |  | - |

X
- References No definition available. + Details
Name: | cik0001013131_DisclosureOfFairValueMeasurementAbstract
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of the fair value measurement of liabilities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2017-01-01 -Paragraph 93 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=13&date=2017-03-01&anchor=para_93&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration