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Basis for preparation, consolidation and accounting policies - Impact of Adoption of IFRS 16 on consolidated statement of financial position (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jun. 14, 2018
Assets          
Mining concessions, development costs, right-of-use asset, property, plant and equipment, net $ 1,537,870 $ 1,650,361 $ 1,754,372    
Right-of-use assets 5,338 7,178      
Deferred income tax asset, net 164,351 73,850      
Total assets 4,561,811 3,979,617 4,107,274    
Liabilities          
Financial obligations 179,417 25,086      
Total liabilities 2,023,280 1,179,760 1,139,074    
Retained earnings 1,239,526 1,503,785      
Total equity, net 2,538,531 2,799,857 2,968,200 $ 3,028,226  
Minera Yanacocha SRL and subsidiary [Member]          
Assets          
Mining concessions, development costs, right-of-use asset, property, plant and equipment, net 1,007,648 1,039,579 1,038,294    
Deferred income tax asset, net 50 1,071      
Total assets 2,107,137 2,313,438      
Liabilities          
Total liabilities 2,751,075 1,989,052      
Retained earnings (999,816) (32,134)      
Total equity, net $ (643,938) $ 324,386 $ 489,712 $ 583,723 $ 6,216