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Trade and other receivables, net - Additional information (Details) - USD ($)
 12 Months Ended
May 01, 2017
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Trade and other receivables, net [Line Items]      
Aggregate of Compensation   $ 3,400,000  
Expense arising from insurance contracts     $ 21,023,000
Sociedad Minera Cerro Verde S.A.A. [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Current payables for purchase of non-current assets   $ 30,300,000 $ 42,400,000
El Brocal [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Aggregate of Compensation Lost Profit $ 36,300,000    
Repair and Cost overruns $ 2,500,000