XML 274 R249.htm IDEA: XBRL DOCUMENT
v3.21.1

Commitments and contingencies - Subsidiaries - Sociedad Minera El Brocal S.A.A (Details) |  |  | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 30, 2020 PEN (S/) item | Dec. 30, 2020 USD ($) item | Dec. 18, 2020 PEN (S/) | Dec. 18, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 PEN (S/) item | Jan. 07, 2021 PEN (S/) | Jan. 07, 2021 USD ($) | Jan. 05, 2021 PEN (S/) | Jan. 05, 2021 USD ($) | Dec. 31, 2020 PEN (S/) | Dec. 31, 2020 USD ($) | Dec. 30, 2020 USD ($) | Jan. 27, 2020 PEN (S/) | Jan. 27, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jan. 08, 2015 PEN (S/) | Jan. 08, 2015 USD ($) | Jun. 18, 2014 PEN (S/) | Jun. 18, 2014 USD ($)
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent liability |  |  |  |  |  |  |  |  |  |  | S/ 43,462,000 | $ 11,993,000 |  |  |  |  |  |  |  |
El Brocal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent liability |  |  |  |  |  |  |  |  |  |  | S/ 5,220,000 | $ 1,445,000 |  |  |  |  |  |  |  |
Amount disbursed recorded as an account receivable |  |  |  |  |  |  | S/ 7,871,000 | $ 2,172,000 |  |  |  |  |  |  |  |  |  |  |  |
SUNAT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax assessment value |  |  |  |  |  |  |  |  | S/ 1,505,948,000 | $ 415,549,000 |  |  |  |  |  |  |  |  |  |
SUNAT | El Brocal | Development cost of Smelter Project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation of the tailings |  |  | S/ 6,108,000 | $ 1,661,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year 2011 [Member] | SUNAT | El Brocal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | S/ 8,333,000 | $ 2,303,000
Year 2012 [Member] | SUNAT | El Brocal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax assessment value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | S/ 4,030,000 | $ 1,112,000 |  |
Tax year 2014 [Member] | SUNAT | El Brocal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of tailings depreciation rate questioned | 2 | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax year 2014 [Member] | SUNAT | El Brocal | Development cost of Smelter Project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent liability | S/ 10,902,000 |  |  |  |  |  |  |  |  |  |  |  | $ 3,008,000 |  |  |  |  |  |  |
Development cost | S/ 16,582,000 | $ 4,576,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year 2015 [Member] | SUNAT | El Brocal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of tailings depreciation rate questioned |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount disbursed recorded as an account receivable |  |  |  |  |  |  |  |  |  |  |  |  |  | S/ 1,456,000 | $ 402,000 |  |  |  |  |
Year 2015 [Member] | SUNAT | El Brocal | Development cost of Smelter Project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of Commitments and contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent liability |  |  |  |  |  | S/ 3,412,000 |  |  |  |  |  |  |  |  |  | $ 942,000 |  |  |  |
Development cost |  |  |  |  | $ 3,844,000 | S/ 13,930,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition The amount of depreciation of the tailings questioned. + References No definition available. + Details
Name: | bvn_DepreciationOfTailingQuestioned
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of development cost of smelter project. + References No definition available. + Details
Name: | bvn_DevelopmentCostOfSmelterProject
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition The amount disbursed which has been recorded as an account receivable. + References No definition available. + Details
Name: | bvn_LegalProceedingsAmountDisbursed
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of tailings depreciation rates was questioned. + References No definition available. + Details
Name: | bvn_NumberOfTailingsDepreciationRateQuestioned
Namespace Prefix: | bvn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The value of tax assessed by tax authorities. + References No definition available. + Details
Name: | bvn_TaxAssessmentValue
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The non-current amount of current tax liabilities. [Refer: Current tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph n -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_n&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_CurrentTaxLiabilitiesNoncurrent
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of the estimated financial effect of contingent liabilities. [Refer: Contingent liabilities [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2020-01-01 -Paragraph 86 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_86_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_EstimatedFinancialEffectOfContingentLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=bvn_ElBrocalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_IfrsIncomeTaxAuthorityNameAxis=bvn_CustomsAndTaxationOrganizationPeruMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfContingentLiabilitiesAxis=bvn_DevelopmentCostOfSmelterProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_IfrsTaxPeriodAxis=bvn_Year2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_IfrsTaxPeriodAxis=bvn_Year2012Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_IfrsTaxPeriodAxis=bvn_Year2014Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bvn_IfrsTaxPeriodAxis=bvn_Year2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |