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Financial instruments - Financial Assets By Institution (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
May 09, 2024
Sep. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Mar. 31, 2023
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2022
Financial instruments [Line Items]                  
Other current financial assets       $ 1,325,843     $ 1,079,595    
Collateral guarantees       5,590     0    
Investment accounted for under the equity method       86,417     585,794   $ 54,386
Altilium Metals Ltd.                  
Financial instruments [Line Items]                  
Investment accounted for under the equity method     $ 4,380 7,620 $ 7,620   $ 0 $ 12,000  
Proportion of ownership interest in associate, percentage     11.00%   3.00%   3.00%    
Salinity Solutions Ltd.                  
Financial instruments [Line Items]                  
Acquisition of equity instruments     $ 1,285            
Proportion of ownership interest in associate, percentage     14.86%            
Electric Era Technologies Inc.                  
Financial instruments [Line Items]                  
Acquisition of equity instruments   $ 3,000              
Proportion of ownership interest in associate, percentage   6.82%              
Azure Minerals                  
Financial instruments [Line Items]                  
Share of ownership in associates 50.00%           50.00%    
Increase (decrease) through transfer between revaluation surplus and retained earnings, equity $ 186,809,000                
Investment accounted for under the equity method       0     $ 542,456    
Financial assets at amortized cost                  
Financial instruments [Line Items]                  
Other current financial assets       1,316,797     1,061,262    
Financial assets at amortized cost | Banco Crédito e Inversiones                  
Financial instruments [Line Items]                  
Other current financial assets       74,459     174,684    
Financial assets at amortized cost | Banco Morgan Stanley                  
Financial instruments [Line Items]                  
Other current financial assets       5,590     0    
Financial assets at amortized cost | Banco Santander                  
Financial instruments [Line Items]                  
Other current financial assets       100,083     415,851    
Financial assets at amortized cost | Banco Itaú CorpBanca                  
Financial instruments [Line Items]                  
Other current financial assets       372,061     66,166    
Financial assets at amortized cost | Scotiabank Chile                  
Financial instruments [Line Items]                  
Other current financial assets       319,128     240,164    
Financial assets at amortized cost | Bank of Nova Scotia                  
Financial instruments [Line Items]                  
Other current financial assets       353,592     51,025    
Financial assets at amortized cost | Sumitomo Mitsui Banking                  
Financial instruments [Line Items]                  
Other current financial assets       91,884     0    
Financial assets at amortized cost | Banco Estado                  
Financial instruments [Line Items]                  
Other current financial assets       0     90,975    
Financial assets at amortized cost | KBC Bank                  
Financial instruments [Line Items]                  
Other current financial assets       0     $ 22,397    
Financial assets at fair value through other comprehensive income | Azure Minerals                  
Financial instruments [Line Items]                  
Acquisition of equity instruments       $ 4,317 $ 12,904 $ 13,480      
Financial asset, ownership interest percentage           19.99%      
Acquisition agreement, right to acquire products, percentage           25.00%