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Summary of significant differences between accounting principles followed by the Company and U.S. Generally Accepted Accounting Principles (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2013
Disclosure of Summary of significant differences between accounting principles followed by the Company and U.S. Generally Accepted Accounting Principles [Line Items]          
Impairment loss $ 2,083 $ 5,693 $ 21,620    
Recognition of Provisions Terms For the purposes of IAS 37, "probable" is defined as more likely than not and refers to a probability of greater than 50%.        
Income Tax, Fines $ 29,000        
Bottom of range [member]          
Disclosure of Summary of significant differences between accounting principles followed by the Company and U.S. Generally Accepted Accounting Principles [Line Items]          
Percentage of Events Likely To Occur 70.00%        
Top of range [member]          
Disclosure of Summary of significant differences between accounting principles followed by the Company and U.S. Generally Accepted Accounting Principles [Line Items]          
Percentage of Events Likely To Occur 80.00%        
Conga [Member]          
Disclosure of Summary of significant differences between accounting principles followed by the Company and U.S. Generally Accepted Accounting Principles [Line Items]          
Impairment loss         $ 1,126,000
Yanacocha mine [Member]          
Disclosure of Summary of significant differences between accounting principles followed by the Company and U.S. Generally Accepted Accounting Principles [Line Items]          
Impairment loss       $ 1,342,000  
Yanacocha mine [Member] | US GAAP [Member]          
Disclosure of Summary of significant differences between accounting principles followed by the Company and U.S. Generally Accepted Accounting Principles [Line Items]          
Impairment loss       $ 933,200