XML 201 R176.htm IDEA: XBRL DOCUMENT
v3.21.1

Provisions, contingent liabilities and other liabilities - Movement of the provision for closure of mining units (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Provisions and contingent liabilities |  |  |  |  |  |
Reversal of impairment loss | $ 2,083 | $ (2,083) | $ 5,693 |  |  |
Sale of mining unit | (5,093) |  |  |  |  |
Disbursements | (26,722) |  |  |  |  |
Classification by maturity |  |  |  |  |  |
Current portion |  |  |  | $ 68,000 | $ 72,771 |
Non-current portion |  |  |  | 252,338 | 221,736 |
Closure Of Mining Units And Exploration Projects [Member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Beginning balance | 252,305 | 225,877 |  |  |  |
Continuing mining units, note 11(a) | 31,500 | 26,722 |  |  |  |
Discontinued mining units, note | 58 | 1,912 |  |  |  |
Exploration projects, note 26(a) | 642 | 4,020 |  |  |  |
Continuing mining units, note 27(a) | 6,424 | 10,266 |  |  |  |
Discontinued mining units, note 1(e) | 176 | 266 |  |  |  |
Exploration projects, note 27(a) | 248 | 124 |  |  |  |
Sale of mining unit | (5,093) |  |  |  |  |
Disbursements | (8,571) | (16,882) |  |  |  |
Final balance | 277,689 | 252,305 | 225,877 |  |  |
Classification by maturity |  |  |  |  |  |
Current portion |  |  |  | 32,462 | 35,280 |
Non-current portion |  |  |  | 245,227 | 217,025 |
Provision for closure of mining units and exploration projects | 277,689 | 252,305 | 225,877 | 277,689 | 252,305 | $ 225,877
Minera Yanacocha SRL and subsidiary [Member] |  |  |  |  |  |
Provisions and contingent liabilities |  |  |  |  |  |
Beginning balance | 1,608,380 | 1,294,464 | 1,234,731 |  |  |
Additional provisions | 120,655 | 301,096 | 43,560 |  |  |
Payments | (22,656) | (23,889) | (19,842) |  |  |
Unwinding of discount, note 19 | 32,049 | 36,709 | 36,015 |  |  |
Final balance | 1,738,428 | 1,608,380 | 1,294,464 |  |  |
Classification by maturity |  |  |  |  |  |
Current portion |  |  |  | 92,706 | 39,156 | 19,325
Non-current portion |  |  |  | 1,645,722 | 1,569,224 | 1,275,139
Provision for closure of mining units and exploration projects | $ 1,738,428 | $ 1,608,380 | $ 1,294,464 | $ 1,738,428 | $ 1,608,380 | $ 1,294,464

X
- Definition The amount of additional provisions made resulted in increase to the reclamation obligations. + References No definition available. + Details
Name: | bvn_AdditionalProvisionsMadeToReclamationObligations
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition The current portion of provision for closure of mining units and exploration projects. + References No definition available. + Details
Name: | bvn_CurrentPortionOfProvisionForClosureOfMiningUnitsAndExplorationProjects
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The decrease in provision for closure of mining units and exploration projects resulting from disbursements. + References No definition available. + Details
Name: | bvn_DecreaseThroughDisbursements
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Provisions and contingent liabilities + References No definition available. + Details
Name: | bvn_DisclosureOfProvisionsLineItems
Namespace Prefix: | bvn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase (decrease) in provisions through adjustment of unwinding of discount + References No definition available. + Details
Name: | bvn_IncreaseDecreaseInProvisionsThroughAdjustmentOfUnwindingOfDiscount
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase in provision for closure of mining units and exploration projects resulting from accretion expense of continued operations. + References No definition available. + Details
Name: | bvn_IncreaseThroughAccretionExpenseFromContinuedOperations
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase in provision for closure of mining units and exploration projects resulting from accretion expense of discontinued operations. + References No definition available. + Details
Name: | bvn_IncreaseThroughAccretionExpenseFromDiscontinuedOperations
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase in provision for closure of mining units from exploration of projects. + References No definition available. + Details
Name: | bvn_IncreaseThroughAccretionExpenseFromExplorationProjects
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase in provision for closure of mining units and exploration projects resulting from changes and additions in estimates of continued operations. + References No definition available. + Details
Name: | bvn_IncreaseThroughAdjustmentsArisingFromEstimatesInContinuedOperations
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase in provision for closure of mining units and exploration projects resulting from changes and additions in estimates of discontinued operations. + References No definition available. + Details
Name: | bvn_IncreaseThroughAdjustmentsArisingFromEstimatesInDiscontinuedOperations
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase(decrease) in provision through reclamation liabilities paid. + References No definition available. + Details
Name: | bvn_IncreasedecreaseInProvisionThroughReclamationLiabilitiesPaid
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The non current portion of provision for closure of mining units and exploration projects + References No definition available. + Details
Name: | bvn_NonCurrentPortionOfProvisionForClosureOfMiningUnitsAndExplorationProjects
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of provision made for closure of mining units and exploration projects. + References No definition available. + Details
Name: | bvn_ProvisionForClosureOfMiningUnitsAndExplorationProjects
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The increase in provision for closure of mining units and exploration projects. + References No definition available. + Details
Name: | bvn_ProvisionForExplorationProjects
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Transfer from Mining units Held For Sale + References No definition available. + Details
Name: | bvn_TransferFromMiningUnitsHeldForSale
Namespace Prefix: | bvn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount recognised as an increase of the carrying amount of an asset or cash-generating unit to its recoverable amount when an impairment loss had been previously recognised. [Refer: Impairment loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 130 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_130_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 130 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_130_d_ii&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ReversalOfImpairmentLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=bvn_ClosureOfMiningUnitsAndExplorationProjectsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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