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Identification and business activity (Details) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Argentina |
Compania Minera Condesa S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Compania Minera Colquirrumi S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Sociedad Minera El Brocal S.A.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Inversiones Colquijirca S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
S.M.R.L. Chaupiloma Dos de Cajamarca [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Minera La Zanja S.R.L. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Minera Julcani S.A. de C.V. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Mexico |
Compania de Minas Buenaventura Chile Ltda. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Chile |
El Molle Verde S.A.C. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Apu Coropuna S.R.L. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Cerro Hablador S.A.C. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Minera Azola S.A.C. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Compania Minera Nueva Italia S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Consorcio Energetico de Huancavelica S.A. [Member] | Energy generation and transmission services [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Empresa de Generacion Huanza S.A. [Member] | Energy generation and transmission services [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Buenaventura Ingenieros S.A. [Member] | Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Contacto Corredores de Seguros S.A. [Member] | Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Empresa de Generacion Huaura S.A.C. [Member] | Energy generation and transmission services [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Contacto Risk Consulting S.A. [Member] | Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Procesadora Industrial Rio Seco S.A. [Member] | Industrial activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Country of incorporation of subsidiary | Peru |
Direct [Member] | Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 56.42% | 56.42%
Direct [Member] | Compania Minera Condesa S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Direct [Member] | Compania Minera Colquirrumi S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Direct [Member] | Sociedad Minera El Brocal S.A.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 3.18% | 3.08%
Direct [Member] | Inversiones Colquijirca S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 89.76% | 89.76%
Direct [Member] | S.M.R.L. Chaupiloma Dos de Cajamarca [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 20.00% | 20.00%
Direct [Member] | Minera La Zanja S.R.L. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 53.06% | 53.06%
Direct [Member] | Minera Julcani S.A. de C.V. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 99.80% | 99.80%
Direct [Member] | Compania de Minas Buenaventura Chile Ltda. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 90.00% | 90.00%
Direct [Member] | El Molle Verde S.A.C. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 99.98% | 99.98%
Direct [Member] | Apu Coropuna S.R.L. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 70.00% | 70.00%
Direct [Member] | Cerro Hablador S.A.C. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 99.00% | 99.00%
Direct [Member] | Minera Azola S.A.C. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 99.00% | 99.00%
Direct [Member] | Compania Minera Nueva Italia S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 0.00%
Direct [Member] | Consorcio Energetico de Huancavelica S.A. [Member] | Energy generation and transmission services [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Direct [Member] | Empresa de Generacion Huanza S.A. [Member] | Energy generation and transmission services [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 0.00%
Direct [Member] | Buenaventura Ingenieros S.A. [Member] | Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Direct [Member] | Contacto Corredores de Seguros S.A. [Member] | Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 99.98% | 99.98%
Direct [Member] | Empresa de Generacion Huaura S.A.C. [Member] | Energy generation and transmission services [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 0.01%
Direct [Member] | Contacto Risk Consulting S.A. [Member] | Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 0.00%
Direct [Member] | Procesadora Industrial Rio Seco S.A. [Member] | Industrial activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Indirect [Member] | Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 43.58% | 43.58%
Indirect [Member] | Compania Minera Condesa S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 0.00%
Indirect [Member] | Compania Minera Colquirrumi S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 0.00%
Indirect [Member] | Sociedad Minera El Brocal S.A.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 58.24% | 58.24%
Indirect [Member] | Inversiones Colquijirca S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 10.24% | 10.24%
Indirect [Member] | S.M.R.L. Chaupiloma Dos de Cajamarca [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 40.00% | 40.00%
Indirect [Member] | Minera La Zanja S.R.L. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 0.00%
Indirect [Member] | Minera Julcani S.A. de C.V. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.20% | 0.20%
Indirect [Member] | Compania de Minas Buenaventura Chile Ltda. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 10.00% | 10.00%
Indirect [Member] | El Molle Verde S.A.C. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.02% | 0.02%
Indirect [Member] | Apu Coropuna S.R.L. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 0.00%
Indirect [Member] | Cerro Hablador S.A.C. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 1.00% | 1.00%
Indirect [Member] | Minera Azola S.A.C. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 1.00% | 1.00%
Indirect [Member] | Compania Minera Nueva Italia S.A. [Member] | Mining activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 93.36% | 93.36%
Indirect [Member] | Consorcio Energetico de Huancavelica S.A. [Member] | Energy generation and transmission services [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 0.00%
Indirect [Member] | Empresa de Generacion Huanza S.A. [Member] | Energy generation and transmission services [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Indirect [Member] | Buenaventura Ingenieros S.A. [Member] | Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 0.00%
Indirect [Member] | Contacto Corredores de Seguros S.A. [Member] | Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.02% | 0.02%
Indirect [Member] | Empresa de Generacion Huaura S.A.C. [Member] | Energy generation and transmission services [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 99.99%
Indirect [Member] | Contacto Risk Consulting S.A. [Member] | Construction, engineering services and insurance brokerage [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 98.00% | 98.00%
Indirect [Member] | Procesadora Industrial Rio Seco S.A. [Member] | Industrial activities [Member] |  |
Disclosure of identification and business activity [Line Items] |  |
Proportion of ownership interest in subsidiary | 0.00% | 0.00%

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