XML 260 R246.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Embedded derivatives (Details) - Sociedad Minera Cerro Verde S.A.A. [Member] Number in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) Number | Dec. 31, 2016 USD ($) Number
Disclosure Of Embedded derivatives [Line Items] |  |
Embedded derivatives,maturity | January 2018 to February 2018 | January 2017 to February 2017
Forward pricing | 8.950 | 5.542
Derivative financial asset liabilities | $ 5,687,000 | $ 319,000
Quantity of Metal | Number | 3,340 | 3,455
Copper cathode [Member] |  |
Disclosure Of Embedded derivatives [Line Items] |  |
Embedded derivatives,maturity | January 2018 | January 2017
Forward pricing | 3.274 | 2.507
Derivative financial asset liabilities | $ 179,000 | $ (1,000,000)
Quantity of Metal | Number | 2,756 | 7,936
Copper concentrate [Member] |  |
Disclosure Of Embedded derivatives [Line Items] |  |
Embedded derivatives,maturity | January 2018 to May 2018 | January 2017 to May 2017
Derivative financial asset liabilities | $ 62,870,000 | $ 68,130,000
Quantity of Metal | Number | 252,830 | 344,787
Bottom of range [member] |  |
Disclosure Of Embedded derivatives [Line Items] |  |
Provisional pricing | $ 7.229 | $ 5.431
Bottom of range [member] | Copper cathode [Member] |  |
Disclosure Of Embedded derivatives [Line Items] |  |
Provisional pricing | 2.970 | 2.488
Bottom of range [member] | Copper concentrate [Member] |  |
Disclosure Of Embedded derivatives [Line Items] |  |
Provisional pricing | $ 2.903 | $ 2.091
Forward pricing | 3.274 | 2.507
Top of range [member] |  |
Disclosure Of Embedded derivatives [Line Items] |  |
Provisional pricing | $ 7.231 | $ 5.484
Top of range [member] | Copper cathode [Member] |  |
Disclosure Of Embedded derivatives [Line Items] |  |
Provisional pricing | 3.246 | 2.678
Top of range [member] | Copper concentrate [Member] |  |
Disclosure Of Embedded derivatives [Line Items] |  |
Provisional pricing | $ 3.166 | $ 2.656
Forward pricing | 3.297 | 2.512

X
- Definition The amount of derivative financial assets(liabilities) + References No definition available. + Details
Name: | cik0001013131_DerivativeFinancialAssetLiabilities
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | cik0001013131_DisclosureOfEmbeddedDerivativesLineItems
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The description of maturity of embedded derivatives. + References No definition available. + Details
Name: | cik0001013131_EmbeddedDerivativesmaturity
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The forward pricing quotation received from suppliers. + References No definition available. + Details
Name: | cik0001013131_ForwardPricing
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition The provisional pricing quotation received from suppliers. + References No definition available. + Details
Name: | cik0001013131_ProvisionalPricing
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The volume of commodities. + References No definition available. + Details
Name: | cik0001013131_QuantityOfMetal
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | cik0001013131_TypesOfCommodityAxis=cik0001013131_CopperCathodeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | cik0001013131_TypesOfCommodityAxis=cik0001013131_CopperConcentrateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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