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Identification and business activity - Subsidiaries (Details)

12 Months Ended

Dec. 31, 2020

Dec. 31, 2019

Compaa de Minas Buenaventura S.A.A. [Member] | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

^[1]

Peru

Compaa Minera Condesa S.A | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Compania Minera Colquirrumi S.A. [Member] | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Sociedad Minera El Brocal S.A.A | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

^[2]

Peru

Inversiones Colquijirca S.A. | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

^[2]

Peru

S.M.R.L. Chaupiloma Dos de Cajamarca [Member] | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Minera La Zanja S.R.L. [Member] | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Minera Julcani S.A. de C.V. [Member] | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

Mexico

Compaa de Minas Buenaventura Chile Ltda. | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

^[3]

Chile

El Molle Verde S.A.C. [Member] | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Apu Coropuna S.R.L. [Member] | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Cerro Hablador S.A.C. [Member] | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Minera Azola S.A.C. [Member] | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Compania Minera Nueva Italia S.A. [Member] | Mining activities [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Consorcio Energtico de Huancavelica S.A. | Energy generation and transmission services [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Empresa de Generacin Huanza S.A | Energy generation and transmission services [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Contacto Corredores de Seguros S.A. [Member] | Construction, engineering services and insurance brokerage [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Contacto Risk Consulting S.A. [Member] | Construction, engineering services and insurance brokerage [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Rio Seco | Industrial activities [Member]

Identification and business activity

Country of incorporation of subsidiary

Peru

Direct [Member] | Compaa de Minas Buenaventura S.A.A. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

^[1]

100.00%

100.00%

Direct [Member] | Compaa Minera Condesa S.A | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

100.00%

100.00%

Direct [Member] | Compania Minera Colquirrumi S.A. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

100.00%

100.00%

Direct [Member] | Sociedad Minera El Brocal S.A.A | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

^[2]

3.19%

3.19%

Direct [Member] | Inversiones Colquijirca S.A. | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

^[2]

89.76%

89.76%

Direct [Member] | S.M.R.L. Chaupiloma Dos de Cajamarca [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

20.00%

20.00%

Direct [Member] | Minera La Zanja S.R.L. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

53.06%

53.06%

Direct [Member] | Minera Julcani S.A. de C.V. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

99.80%

99.80%

Direct [Member] | Compaa de Minas Buenaventura Chile Ltda. | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

^[3]

90.00%

90.00%

Direct [Member] | El Molle Verde S.A.C. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

99.98%

99.98%

Direct [Member] | Apu Coropuna S.R.L. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

70.00%

70.00%

Direct [Member] | Cerro Hablador S.A.C. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

99.00%

99.00%

Direct [Member] | Minera Azola S.A.C. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

99.00%

99.00%

Direct [Member] | Compania Minera Nueva Italia S.A. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.00%

0.00%

Direct [Member] | Consorcio Energtico de Huancavelica S.A. | Energy generation and transmission services [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

100.00%

100.00%

Direct [Member] | Empresa de Generacin Huanza S.A | Energy generation and transmission services [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.00%

0.00%

Direct [Member] | Contacto Corredores de Seguros S.A. [Member] | Construction, engineering services and insurance brokerage [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

99.98%

99.98%

Direct [Member] | Contacto Risk Consulting S.A. [Member] | Construction, engineering services and insurance brokerage [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.00%

0.00%

Direct [Member] | Rio Seco | Industrial activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

100.00%

100.00%

Indirect [Member] | Compaa de Minas Buenaventura S.A.A. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

^[1]

0.00%

0.00%

Indirect [Member] | Compaa Minera Condesa S.A | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.00%

0.00%

Indirect [Member] | Compania Minera Colquirrumi S.A. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.00%

0.00%

Indirect [Member] | Sociedad Minera El Brocal S.A.A | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

^[2]

58.24%

58.24%

Indirect [Member] | Inversiones Colquijirca S.A. | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

^[2]

10.24%

10.24%

Indirect [Member] | S.M.R.L. Chaupiloma Dos de Cajamarca [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

40.00%

40.00%

Indirect [Member] | Minera La Zanja S.R.L. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.00%

0.00%

Indirect [Member] | Minera Julcani S.A. de C.V. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.20%

0.20%

Indirect [Member] | Compaa de Minas Buenaventura Chile Ltda. | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

^[3]

10.00%

10.00%

Indirect [Member] | El Molle Verde S.A.C. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.02%

0.02%

Indirect [Member] | Apu Coropuna S.R.L. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.00%

0.00%

Indirect [Member] | Cerro Hablador S.A.C. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

1.00%

1.00%

Indirect [Member] | Minera Azola S.A.C. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

1.00%

1.00%

Indirect [Member] | Compania Minera Nueva Italia S.A. [Member] | Mining activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.00%

93.36%

Indirect [Member] | Consorcio Energtico de Huancavelica S.A. | Energy generation and transmission services [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.00%

0.00%

Indirect [Member] | Empresa de Generacin Huanza S.A | Energy generation and transmission services [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

100.00%

100.00%

Indirect [Member] | Contacto Corredores de Seguros S.A. [Member] | Construction, engineering services and insurance brokerage [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.02%

0.02%

Indirect [Member] | Contacto Risk Consulting S.A. [Member] | Construction, engineering services and insurance brokerage [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

98.00%

98.00%

Indirect [Member] | Rio Seco | Industrial activities [Member]

Identification and business activity

Proportion of ownership interest in subsidiary

0.00%

0.00%

[1]	(*)         Includes four operating mining units in Peru (Uchucchacua, Orcopampa, Julcani and Tambomayo), two discontinued mining units (Poracota and Shila-Paula), and one mining unit under development stage (San Gabriel)
[2]	(**)       As of December 31, 2020 and 2019, the participation of the Company in the voting rights of El Brocal is 61.43 percent. Inversiones Colquijirca S.A. (hereafter “Colquijirca”), a Group’s subsidiary (99.99 percent as of December 31, 2020 and 2019), has an interest in El Brocal’s capital stock, through which the Company holds an indirect participation in El Brocal of 58.24 percent as of December 31, 2020 and 2019.
[3]	(***)     On January 21, 2021, the Company sold 100% of its shares of Compañía de Minas Buenaventura Chile Ltda., which were presented as financial investments as of December 31, 2020. The sale value was US$30,000 which are fully collected as of the date of this report.

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