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Trade and other payables - Movement of dividends payable (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Trade and other payables |  |  |
Beginning balance | $ 604 | $ 663 | $ 730
Declared dividends to controlling shareholders, note 17(d) |  | 22,098 | 22,860
Dividends paid to controlling shareholders |  | (22,098) | (22,860)
Declared dividends to non-controlling shareholders, note 17(d) | 5,140 | 6,500 | 5,560
Dividends paid to non-controlling shareholders, note 17(d) | (5,140) | (6,500) | (5,560)
Expired dividends | (26) | (53) | (44)
Other minor | 60 | (6) | (23)
Final balance | $ 638 | $ 604 | $ 663

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

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- Definition The amount of dividends declared to noncontrolling shareholders. + References No definition available. + Details
Name: | bvn_DividendDeclaredToNoncontrollingShareholders
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of dividend declared to controlling shareholders. + References No definition available. + Details
Name: | bvn_DividendsDeclaredToOwners
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of dividends paid to controlling shareholder. + References No definition available. + Details
Name: | bvn_DividendsPaidToOwners
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The element represents the amount of expired dividends. + References No definition available. + Details
Name: | bvn_ExpiredDividend
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The element represents the amount of other minor adjustments pertaining to dividends. + References No definition available. + Details
Name: | bvn_OtherMinor
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of dividends that the company has declared but not yet paid. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DividendPayables
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of dividends paid to non-controlling interests. [Refer: Non-controlling interests] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B10 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B10_a&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
Name: | ifrs-full_DividendsPaidToNoncontrollingInterests
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration