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Selling Expenses (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of Selling Expenses [Line Items] |  |  |
Sales and marketing expense | $ 27,522 | $ 24,088 | $ 21,733
Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |
Disclosure of Selling Expenses [Line Items] |  |  |
concentrate freight | 126,670 | 131,528 | 122,431
commissions | 6,048 | 6,029 | 5,989
cathode freight | 1,831 | 1,665 | 2,148
Other | 2,459 | 2,447 | 823
Sales and marketing expense | $ 0 | $ 141,669 | $ 131,391

X
- Definition The amount of expense relating to cathode freight. + References No definition available. + Details
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Namespace Prefix: | cik0001013131_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of expense relating to commissions. + References No definition available. + Details
Name: | cik0001013131_Commissions
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of expense relating to concentrate freight. + References No definition available. + Details
Name: | cik0001013131_ConcentrateFreight
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | cik0001013131_DisclosureOfSellingExpensesLineItems
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of selling expenses that the entity does not separately disclose in the same statement or note. + References No definition available. + Details
Name: | cik0001013131_OtherSellingExpenses
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of expense relating to the marketing and selling of goods or services. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_85&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_SalesAndMarketingExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_SignificantInvestmentsInAssociatesAxis=cik0001013131_SociedadMineraCerroVerdeSaaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |