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Mining concessions, development costs, right-of-use asset, property, plant and equipment, net (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Jan. 01, 2019
Mining concessions, development costs, property, plant and equipment, net      
Opening balance $ 1,847,615 $ 1,949,555  
Property, plant and equipment, net 1,754,372 1,847,615  
Balance as of December 1,754,372 1,847,615  
IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Property, plant and equipment, net 6,185   $ 18,528
Balance as of December 6,185    
Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 3,727,403 3,596,342  
Additions 133,070 172,509  
Disposals (48,153) (9,725)  
Sales (45,772) (9,908)  
Reclassifications and transfers (3,750) (21,815)  
Property, plant and equipment, net 3,781,326 3,727,403  
Balance as of December 3,781,326 3,727,403  
Gross carrying amount [Member] | IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Property, plant and equipment, net 18,528    
Balance as of December 18,528    
Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (1,853,513) (1,611,982)  
Additions (222,221) (253,968)  
Disposals 36,331 262  
Sales 40,807 9,282  
Reclassifications and transfers   (2,893)  
Property, plant and equipment, net (1,998,596) (1,853,513)  
Balance as of December (1,998,596) (1,853,513)  
Accumulated impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (26,275) (34,805)  
Additions (2,083)    
Disposals   8,530  
Property, plant and equipment, net (28,358) (26,275)  
Balance as of December (28,358) (26,275)  
Land [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 21,761 22,690  
Additions 630 783  
Disposals   (462)  
Sales 135    
Reclassifications and transfers (4,739) (1,250)  
Property, plant and equipment, net 17,517 21,761  
Balance as of December 17,517 21,761  
Land [Member] | Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance   (1,249)  
Reclassifications and transfers   (1,249)  
Property, plant and equipment, net   (1,249)  
Balance as of December      
Mining concessions [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 151,873 151,873  
Property, plant and equipment, net 151,873 151,873  
Balance as of December 151,873 151,873  
Mining concessions [Member] | Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (40,249) (40,239)  
Additions (10) (10)  
Property, plant and equipment, net (40,259) (40,249)  
Balance as of December (40,259) (40,249)  
Development costs [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 743,259 712,051  
Additions 46,047 32,059  
Disposals (443) (2,656)  
Reclassifications and transfers (819) 1,805  
Property, plant and equipment, net 788,044 743,259  
Balance as of December 788,044 743,259  
Development costs [Member] | Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (298,553) (263,122)  
Additions (29,964) (35,433)  
Reclassifications and transfers   (2)  
Property, plant and equipment, net (328,517) (298,553)  
Balance as of December (328,517) (298,553)  
Buildings | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 1,342,621 1,279,251  
Additions 39    
Disposals (3,559) (2,837)  
Sales 5,380    
Reclassifications and transfers 26,120 66,207  
Property, plant and equipment, net 1,359,841 1,342,621  
Balance as of December 1,359,841 1,342,621  
Buildings | Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (591,643) (506,837)  
Additions (83,274) (84,244)  
Disposals 3,391    
Sales 3,569    
Reclassifications and transfers (638) 562  
Property, plant and equipment, net (667,319) (591,643)  
Balance as of December $ (667,319) (591,643)  
Machinery and equipment | Bottom of range [member]      
Mining concessions, development costs, property, plant and equipment, net      
Term of lease 1 year    
Machinery and equipment | Top of range [member]      
Mining concessions, development costs, property, plant and equipment, net      
Term of lease 3 years    
Machinery and equipment | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance $ 958,466 929,023  
Additions 12    
Disposals (30,235) (182)  
Sales 38,322 (9,205)  
Reclassifications and transfers 22,783 38,830  
Property, plant and equipment, net 912,704 958,466  
Balance as of December 912,704 958,466  
Machinery and equipment | Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (665,357) (582,449)  
Additions (66,020) (93,722)  
Disposals 28,619 177  
Sales 35,459 8,659  
Reclassifications and transfers 638 (1,978)  
Property, plant and equipment, net (667,937) (665,357)  
Balance as of December (667,937) (665,357)  
Vehicles [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 10,885 9,946  
Additions 33 42  
Disposals (540) (138)  
Sales 1,856 (510)  
Reclassifications and transfers 370 1,545  
Property, plant and equipment, net 8,892 10,885  
Balance as of December 8,892 10,885  
Vehicles [Member] | Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (8,599) (8,390)  
Additions (744) (745)  
Disposals 538 85  
Sales 1,779 436  
Reclassifications and transfers   (15)  
Property, plant and equipment, net (7,026) (8,599)  
Balance as of December (7,026) (8,599)  
Fixtures and fittings [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 13,306 13,902  
Additions 2    
Disposals (1,310)    
Sales 1 (193)  
Reclassifications and transfers 13 (403)  
Property, plant and equipment, net 12,010 13,306  
Balance as of December 12,010 13,306  
Fixtures and fittings [Member] | Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (10,123) (9,880)  
Additions (653) (644)  
Disposals 1,172    
Sales   187  
Reclassifications and transfers   (214)  
Property, plant and equipment, net (9,604) (10,123)  
Balance as of December (9,604) (10,123)  
Units in transit [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 2,682 4,749  
Additions   11  
Disposals (1)    
Reclassifications and transfers 1,073 (2,078)  
Property, plant and equipment, net 3,754 2,682  
Balance as of December 3,754 2,682  
Construction in Progress [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 56,662 101,122  
Additions 44,319 67,096  
Disposals (1,168) (3,450)  
Sales 78    
Reclassifications and transfers (49,370) (108,106)  
Property, plant and equipment, net 50,365 56,662  
Balance as of December 50,365 56,662  
Stripping activity asset [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 141,726 130,447  
Additions 11,545 11,279  
Reclassifications and transfers 819    
Property, plant and equipment, net 154,090 141,726  
Balance as of December 154,090 141,726  
Stripping activity asset [Member] | Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (70,518) (41,695)  
Additions (18,405) (28,820)  
Reclassifications and transfers   3  
Property, plant and equipment, net (88,923) (70,518)  
Balance as of December (88,923) (70,518)  
Right-of-use assets [member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions 3,721    
Disposals (10,897)    
Property, plant and equipment, net 11,352    
Balance as of December 11,352    
Right-of-use assets [member] | Gross carrying amount [Member] | IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Property, plant and equipment, net 18,528    
Balance as of December 18,528    
Right-of-use assets [member] | Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions (7,778)    
Disposals 2,611    
Property, plant and equipment, net (5,167)    
Balance as of December (5,167)    
Mine closure costs [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 284,162 241,288  
Additions 26,722 61,239  
Reclassifications and transfers   (18,365)  
Property, plant and equipment, net 310,884 284,162  
Balance as of December 310,884 284,162  
Mine closure costs [Member] | Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (168,471) (158,121)  
Additions (15,373) (10,350)  
Property, plant and equipment, net (183,844) (168,471)  
Balance as of December (183,844) (168,471)  
Mine closure costs [Member] | Accumulated impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (13,207) (20,121)  
Additions (2,083)    
Disposals   5,693  
Reclassifications and transfers   (1,221)  
Property, plant and equipment, net (15,290) (13,207)  
Balance as of December (15,290) (13,207)  
Mine Development Cost [Member] | Accumulated impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (10,153) (10,153)  
Property, plant and equipment, net (10,153) (10,153)  
Balance as of December (10,153) (10,153)  
Mining Concessions And Development Costs [Member] | Accumulated impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance (2,915) (4,531)  
Disposals   2,837  
Reclassifications and transfers   1,221  
Property, plant and equipment, net (2,915) (2,915)  
Balance as of December (2,915) (2,915)  
Sociedad Minera Cerro Verde S.A.A. [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 5,602,902 5,678,424  
Property, plant and equipment, net 5,690,851 5,602,902  
Balance as of December 5,690,851 5,602,902  
Sociedad Minera Cerro Verde S.A.A. [Member] | IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions   95,728  
Sociedad Minera Cerro Verde S.A.A. [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 8,166,652 7,758,870  
Additions 488,578 468,912  
Disposals (36,886) (29,113)  
Property, plant and equipment, net 8,753,310 8,166,652  
Balance as of December $ 8,753,310 8,166,652  
Sociedad Minera Cerro Verde S.A.A. [Member] | Gross carrying amount [Member] | IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions   95,728  
Sociedad Minera Cerro Verde S.A.A. [Member] | Land [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Term of lease 10 years    
Sociedad Minera Cerro Verde S.A.A. [Member] | Land [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance $ 24,663 24,467  
Additions 0 0  
Disposals (80) 0  
Property, plant and equipment, net 24,905 24,663  
Balance as of December $ 24,905 24,663  
Sociedad Minera Cerro Verde S.A.A. [Member] | Land [Member] | Gross carrying amount [Member] | IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions   0  
Sociedad Minera Cerro Verde S.A.A. [Member] | Buildings | Bottom of range [member]      
Mining concessions, development costs, property, plant and equipment, net      
Term of lease 1 year    
Sociedad Minera Cerro Verde S.A.A. [Member] | Buildings | Top of range [member]      
Mining concessions, development costs, property, plant and equipment, net      
Term of lease 14 years    
Sociedad Minera Cerro Verde S.A.A. [Member] | Machinery and equipment | Bottom of range [member]      
Mining concessions, development costs, property, plant and equipment, net      
Term of lease 4 years    
Sociedad Minera Cerro Verde S.A.A. [Member] | Machinery and equipment | Top of range [member]      
Mining concessions, development costs, property, plant and equipment, net      
Term of lease 14 years    
Sociedad Minera Cerro Verde S.A.A. [Member] | Machinery and equipment | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance $ 4,694,050 4,553,508  
Additions 0 0  
Disposals (30,482) (19,426)  
Property, plant and equipment, net 4,854,613 4,694,050  
Balance as of December 4,854,613 4,694,050  
Sociedad Minera Cerro Verde S.A.A. [Member] | Machinery and equipment | Gross carrying amount [Member] | IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions   0  
Sociedad Minera Cerro Verde S.A.A. [Member] | Vehicles [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 23,251 20,557  
Additions 0 0  
Disposals (32) (32)  
Property, plant and equipment, net 26,365 23,251  
Balance as of December 26,365 23,251  
Sociedad Minera Cerro Verde S.A.A. [Member] | Vehicles [Member] | Gross carrying amount [Member] | IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions   0  
Sociedad Minera Cerro Verde S.A.A. [Member] | Fixtures and fittings [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 949 949  
Additions 0 0  
Disposals 0 0  
Property, plant and equipment, net 949 949  
Balance as of December 949 949  
Sociedad Minera Cerro Verde S.A.A. [Member] | Fixtures and fittings [Member] | Gross carrying amount [Member] | IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions   0  
Sociedad Minera Cerro Verde S.A.A. [Member] | Construction in Progress [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 185,928 149,661  
Additions 271,364 288,861  
Disposals 0 0  
Property, plant and equipment, net 158,068 185,928  
Balance as of December 158,068 185,928  
Sociedad Minera Cerro Verde S.A.A. [Member] | Construction in Progress [Member] | Gross carrying amount [Member] | IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions   0  
Sociedad Minera Cerro Verde S.A.A. [Member] | Mine Maintenance Truck Shop [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions 78,200    
Sociedad Minera Cerro Verde S.A.A. [Member] | Haul Trucks [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions 47,100    
Sociedad Minera Cerro Verde S.A.A. [Member] | Stators For Ball Mills [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions 18,300    
Sociedad Minera Cerro Verde S.A.A. [Member] | Tailing Drain Expansion [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions 15,200    
Sociedad Minera Cerro Verde S.A.A. [Member] | Concentrator Optimization Project [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions 12,300    
Sociedad Minera Cerro Verde S.A.A. [Member] | Regrowth Of Leach Pad [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions 10,900    
Sociedad Minera Cerro Verde S.A.A. [Member] | Staged Flotation Reactor Engineering Project [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions 6,200    
Sociedad Minera Cerro Verde S.A.A. [Member] | Stripping activity asset [Member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Opening balance 655,709 478,382  
Additions 197,038 177,327  
Disposals 0 0  
Property, plant and equipment, net 852,747 655,709  
Balance as of December 852,747 655,709  
Sociedad Minera Cerro Verde S.A.A. [Member] | Stripping activity asset [Member] | Gross carrying amount [Member] | IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions   0  
Sociedad Minera Cerro Verde S.A.A. [Member] | Right-of-use assets [member] | Gross carrying amount [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions 1,342    
Disposals (929)    
Property, plant and equipment, net 95,441    
Balance as of December 95,441    
Sociedad Minera Cerro Verde S.A.A. [Member] | Right-of-use assets [member] | Gross carrying amount [Member] | IFRS 16 [Member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions   $ 95,728  
Sociedad Minera Cerro Verde S.A.A. [Member] | Right-of-use assets [member] | Accumulated depreciation, amortisation and impairment [member]      
Mining concessions, development costs, property, plant and equipment, net      
Additions (11,488)    
Disposals 903    
Property, plant and equipment, net (10,585)    
Balance as of December $ (10,585)