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Cash and cash equivalents - Term deposit balance (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Cash and cash equivalents    
Short-term deposits, classified as cash equivalents $ 161,145 $ 50,000
Minera Yanacocha SRL and subsidiary [Member]    
Cash and cash equivalents    
Short-term deposits, classified as cash equivalents 667,747 819,628
Scotiabank Peru [Member] | Sociedad Minera Cerro Verde S.A.A. [Member]    
Cash and cash equivalents    
Short-term deposits, classified as cash equivalents   125,000
Citibank NY [Member] | Sociedad Minera Cerro Verde S.A.A. [Member]    
Cash and cash equivalents    
Short-term deposits, classified as cash equivalents   92,300
JP Morgan [Member] | Minera Yanacocha SRL and subsidiary [Member]    
Cash and cash equivalents    
Short-term deposits, classified as cash equivalents 277,387 404,319
Citi bank [Member] | Minera Yanacocha SRL and subsidiary [Member]    
Cash and cash equivalents    
Short-term deposits, classified as cash equivalents 190,011 215,073
Santander [Member] | Minera Yanacocha SRL and subsidiary [Member]    
Cash and cash equivalents    
Short-term deposits, classified as cash equivalents 50,019 50,114
BNP Paribas [Member] | Minera Yanacocha SRL and subsidiary [Member]    
Cash and cash equivalents    
Short-term deposits, classified as cash equivalents 50,158 50,080
Standard Chartered [Member] | Minera Yanacocha SRL and subsidiary [Member]    
Cash and cash equivalents    
Short-term deposits, classified as cash equivalents 50,125 50,031
MUFG Bank [Member] | Minera Yanacocha SRL and subsidiary [Member]    
Cash and cash equivalents    
Short-term deposits, classified as cash equivalents $ 50,047 $ 50,011