XML 291 R266.htm IDEA: XBRL DOCUMENT
v3.21.1

Derivative financial instruments - Composition of open transactions (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) lb | Dec. 31, 2019 USD ($)
Disclosure of derivative financial instruments [Line Items] |  |
Fair value | $ (18,439) |
Copper Price Hedging Instrument [Member] |  |
Disclosure of derivative financial instruments [Line Items] |  |
Quantity of commodity | lb | 20,750 |
Fair value | $ (15,804) |
Settlement period one [Member] | Copper Price Hedging Instrument [Member] |  |
Disclosure of derivative financial instruments [Line Items] |  |
Quantity of commodity | lb | 1,250 |
Fixed Quotation | $ 6,500 |
Future quotation | 7,758 |
Fair value | $ (1,572) |
Settlement period one [Member] | Minimum |  |
Disclosure of derivative financial instruments [Line Items] |  |
Fixed Quotation |  | $ 6,500
Settlement period two [Member] | Copper Price Hedging Instrument [Member] |  |
Disclosure of derivative financial instruments [Line Items] |  |
Quantity of commodity | lb | 1,250 |
Fixed Quotation | $ 6,500 |
Future quotation | 7,762 |
Fair value | $ (1,577) |
Settlement period two [Member] | Minimum |  |
Disclosure of derivative financial instruments [Line Items] |  |
Fixed Quotation |  | $ 6,500
Settlement period three [Member] | Copper Price Hedging Instrument [Member] |  |
Disclosure of derivative financial instruments [Line Items] |  |
Quantity of commodity | lb | 2,250 |
Fixed Quotation | $ 6,633 |
Future quotation | 7,767 |
Fair value | $ (2,549) |
Settlement period four [Member] | Copper Price Hedging Instrument [Member] |  |
Disclosure of derivative financial instruments [Line Items] |  |
Quantity of commodity | lb | 2,000 |
Fixed Quotation | $ 6,750 |
Future quotation | 7,769 |
Fair value | $ (2,036) |
Settlement period five [Member] | Copper Price Hedging Instrument [Member] |  |
Disclosure of derivative financial instruments [Line Items] |  |
Quantity of commodity | lb | 3,000 |
Fixed Quotation | $ 6,897 |
Future quotation | 7,769 |
Fair value | $ (2,615) |
Settlement period six [Member] | Copper Price Hedging Instrument [Member] |  |
Disclosure of derivative financial instruments [Line Items] |  |
Quantity of commodity | lb | 3,000 |
Fixed Quotation | $ 6,967 |
Future quotation | 7,770 |
Fair value | $ (2,408) |
Settlement period seven [Member] | Copper Price Hedging Instrument [Member] |  |
Disclosure of derivative financial instruments [Line Items] |  |
Quantity of commodity | lb | 2,000 |
Fixed Quotation | $ 7,025 |
Future quotation | 7,768 |
Fair value | $ (1,483) |
Settlement period eight [Member] | Copper Price Hedging Instrument [Member] |  |
Disclosure of derivative financial instruments [Line Items] |  |
Quantity of commodity | lb | 2,000 |
Fixed Quotation | $ 7,100 |
Future quotation | 7,765 |
Fair value | $ (1,327) |
Settlement period nine [Member] | Copper Price Hedging Instrument [Member] |  |
Disclosure of derivative financial instruments [Line Items] |  |
Quantity of commodity | lb | 2,000 |
Fixed Quotation | $ 7,500 |
Future quotation | 7,762 |
Fair value | $ (523) |
Settlement period ten [Member] | Copper Price Hedging Instrument [Member] |  |
Disclosure of derivative financial instruments [Line Items] |  |
Quantity of commodity | lb | 2,000 |
Fixed Quotation | $ 7,900 |
Future quotation | 7,757 |
Fair value | $ 286 |

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

X
- Definition The fixed quotation received from suppliers. + References No definition available. + Details
Name: | bvn_FixedQuotation
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The future quotation received from suppliers. + References No definition available. + Details
Name: | bvn_FutureQuotation
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The quantity of commodity used in the hedge. + References No definition available. + Details
Name: | bvn_QuantityOfCommodity
Namespace Prefix: | bvn_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value of financial instruments designated as hedging instruments. Hedging instruments are designated derivatives or (for a hedge of the risk of changes in foreign currency exchange rates only) designated non-derivative financial assets or non-derivative financial liabilities whose fair value or cash flows are expected to offset changes in the fair value or cash flows of a designated hedged item. [Refer: At fair value [member]; Derivatives [member]; Derivative financial assets; Derivative financial liabilities; Financial instruments, class [member]; Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 22 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_22_b&doctype=Standard&book=b -URIDate 2020-01-01 + Details
Name: | ifrs-full_FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_HedgingInstrumentsAxis=bvn_CopperPriceHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_PeriodOfSettlementAxis=bvn_SettlementPeriodOneMember
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: | bvn_PeriodOfSettlementAxis=bvn_SettlementPeriodTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_PeriodOfSettlementAxis=bvn_SettlementPeriodThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_PeriodOfSettlementAxis=bvn_SettlementPeriodFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_PeriodOfSettlementAxis=bvn_SettlementPeriodFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_PeriodOfSettlementAxis=bvn_SettlementPeriodSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_PeriodOfSettlementAxis=bvn_SettlementPeriodSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_PeriodOfSettlementAxis=bvn_SettlementPeriodEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_PeriodOfSettlementAxis=bvn_SettlementPeriodNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_PeriodOfSettlementAxis=bvn_SettlementPeriodTenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |