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Hierarchy and fair value of financial instruments (Details Textuals) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Hierarchy and fair value of financial instruments [Line Items]
Derivative financial asset liabilities	$ (20,113)	$ 68,736
Sociedad Minera Cerro Verde S.A.A. [Member]
Hierarchy and fair value of financial instruments [Line Items]
Derivative financial asset liabilities	$ 20,100	$ 68,700

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- Definition

The amount of derivative financial assets(liabilities)

+ References

No definition available.

+ Details

Name:	cik0001013131_DerivativeFinancialAssetLiabilities
Namespace Prefix:	cik0001013131_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	cik0001013131_HierarchyAndFairValueOfFinancialInstrumentsLineItems
Namespace Prefix:	cik0001013131_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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