XML 254 R240.htm IDEA: XBRL DOCUMENT
v3.19.1

Related parties (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |
Disclosure Of Related Party Explanatory [Line Items] |  |  |
Description of basis for determining transaction price and type of delivery |  | at a price based on the Metals Week Dealer Oxide price and under a delivery type known as CIF (cost, insurance and freight) |
Amounts payable, related party transactions |  | $ 14,874 | $ 13,681
Amounts receivable, related party transactions |  | 413,351 | 477,419
Sociedad Minera Cerro Verde S.A.A. [Member] | Stock option benefits [Member] |  |  |
Disclosure Of Related Party Explanatory [Line Items] |  |  |
Amounts payable, related party transactions |  | 8,900 | 8,100
Sociedad Minera Cerro Verde S.A.A. [Member] | Freeport Minerals Corporation [Member] |  |  |
Disclosure Of Related Party Explanatory [Line Items] |  |  |
Amounts payable, related party transactions |  | 8,860 | 8,470
Amounts receivable, related party transactions | [1] | 409,688 | 372,327
Sociedad Minera Cerro Verde S.A.A. [Member] | Sumitomo Metal Mining Company, Ltd. [Member] |  |  |
Disclosure Of Related Party Explanatory [Line Items] |  |  |
Amounts receivable, related party transactions | [2] | 12,918 | 19,900
Sociedad Minera Cerro Verde S.A.A. [Member] | Climax Molybdenum Marketing Corporation [Member] |  |  |
Disclosure Of Related Party Explanatory [Line Items] |  |  |
Amounts receivable, related party transactions | [3] | $ 10,038 | 19,570
Sociedad Minera Cerro Verde S.A.A. [Member] | Copper concentrate [Member] | Freeport Minerals Corporation [Member] | Long-term contracts [member] | Bottom of range [member] |  |  |
Disclosure Of Related Party Explanatory [Line Items] |  |  |
Proportion of sales commitment made by entity, related party transactions |  | 70.00% |
Sociedad Minera Cerro Verde S.A.A. [Member] | Copper concentrate [Member] | Freeport Minerals Corporation [Member] | Long-term contracts [member] | Top of range [member] |  |  |
Disclosure Of Related Party Explanatory [Line Items] |  |  |
Proportion of sales commitment made by entity, related party transactions |  | 80.00% |
Sociedad Minera Cerro Verde S.A.A. [Member] | Copper concentrate [Member] | Sumitomo Metal Mining Company, Ltd. [Member] | Long-term contracts [member] |  |  |
Disclosure Of Related Party Explanatory [Line Items] |  |  |
Proportion of sales commitment made by entity, related party transactions |  | 21.00% |
Sociedad Minera Cerro Verde S.A.A. [Member] | Molybdenum concentrate [Member] | Climax Molybdenum Marketing Corporation [Member] | Long-term contracts [member] |  |  |
Disclosure Of Related Party Explanatory [Line Items] |  |  |
Proportion of sales commitment made by entity, related party transactions |  | 100.00% |
Embedded derivatives [Member] |  |  |
Disclosure Of Related Party Explanatory [Line Items] |  |  |
Amounts receivable, related party transactions |  | $ 19,300 | $ 65,600
[1] | Accounts receivable from FMC mainly correspond to sales of copper concentrate and copper cathode. The Company has a long-term agreement with FMC through which it has committed to sell between 70% and 80% of its annual copper concentrate production through December 31, 2021. Terms of the contracts are reviewed annually.
[2] | The Company has a long-term agreement with Sumitomo through which it has committed to sell 21% of its annual copper concentrates production through December 31, 2021. Terms of the contracts are reviewed annually.
[3] | The Company has a long-term agreement with Climax Molybdenum Marketing Corporation (a wholly owned subsidiary of FMC) through which it has committed to sell 100% of its annual molybdenum concentrate production, at a price based on the Metals Week Dealer Oxide price and under a delivery type known as CIF (cost, insurance and freight) through December 31, 2020.

X
- Definition Description of basis for determining transaction price and type of delivery. + References No definition available. + Details
Name: | cik0001013131_DescriptionOfBasisForDeterminingTransactionPriceAndTypeOfDelivery
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | cik0001013131_DisclosureOfRelatedPartyExplanatoryLineItems
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of sales commitment on annual production of copper concentrate made by the entity. + References No definition available. + Details
Name: | cik0001013131_ProportionOfSalesCommitmentMadeByEntityRelatedPartyTransactions
Namespace Prefix: | cik0001013131_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amounts payable resulting from related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2018-01-01 -Paragraph 20 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_20&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2018-01-01 -Paragraph 18 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_18_b&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_AmountsPayableRelatedPartyTransactions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amounts receivable resulting from related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2018-01-01 -Paragraph 20 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_20&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2018-01-01 -Paragraph 18 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_18_b&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_AmountsReceivableRelatedPartyTransactions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=cik0001013131_SociedadMineraCerroVerdeSaaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cik0001013131_EmplyeeBenefitExpensesAxis=cik0001013131_StockOptionBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=cik0001013131_FreeportMineralsCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=cik0001013131_SumitomoMetalMiningCompanyLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=cik0001013131_ClimaxMolybdenumMarketingCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=cik0001013131_CopperConcentrateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ContractDurationAxis=ifrs-full_LongtermContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=cik0001013131_MolybdenumConcentrateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=cik0001013131_EmbeddedDerivativesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |