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Financial - risk management objectives and policies - Additional information (Details)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Financial risk management [Line Items]
Decrease in exchange rate basis points	10.00%	10.00%	10.00%

X

- Definition

The percentage of decrease in exchange rate basis points.

+ References

No definition available.

+ Details

Name:	bvn_DecreaseInExchangeRateBasisPoints
Namespace Prefix:	bvn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	bvn_DisclosureOfFinancialRiskManagementLineItems
Namespace Prefix:	bvn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration