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Other accounts payable - Additional information (Details) - Sociedad Minera Cerro Verde S.A.A. [Member] - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of other accounts payable [Line Items] |  |
Current portion of monthly payments of disputed mining royalties | $ 336.0 | $ 457.6
Current portion of monthly payments of interest and penalties of disputed mining royalties | 186.5 | $ 256.1
Non-current portion of monthly payments of interest and penalties of disputed mining royalties | $ 16.6 |

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- Definition The amount of current portion of the monthly payments of the installment programs of disputed mining royalties and special mining tax. + References No definition available. + Details
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Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of current portion of the monthly payments of interest and penalties of disputed mining royalties. + References No definition available. + Details
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Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition The amount of non current portion of the monthly payments of interest and penalties of disputed mining royalties. + References No definition available. + Details
Name: | bvn_NonCurrentPortionOfMonthlyPaymentsOfInterestAndPenaltiesOfDisputedMiningRoyalties
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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