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Intangible assets and goodwill - Movements in Identifiable Goodwill (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of reconciliation of changes in goodwill [line items]    
Goodwill Begining Balance $ 34,596 $ 41,966
Goodwill Ending Balance 967 34,596
Gross carrying amount    
Disclosure of reconciliation of changes in goodwill [line items]    
Goodwill Begining Balance 34,596 41,966
Additional recognition 0  
Impairment losses recognized in profit or loss for the year (33,629)  
Total increase (decrease) (33,629) (7,370)
Goodwill Ending Balance 967 34,596
SQM S.A. | Gross carrying amount    
Disclosure of reconciliation of changes in goodwill [line items]    
Goodwill Begining Balance 22,255 22,255
Additional recognition 0  
Impairment losses recognized in profit or loss for the year (22,255)  
Total increase (decrease) (22,255)  
Goodwill Ending Balance 0 22,255
SQM Iberian S.A. | Gross carrying amount    
Disclosure of reconciliation of changes in goodwill [line items]    
Goodwill Begining Balance 148 148
Additional recognition 0  
Impairment losses recognized in profit or loss for the year 0  
Total increase (decrease) 0  
Goodwill Ending Balance 148 148
SQM Investment Corporation N.V. | Gross carrying amount    
Disclosure of reconciliation of changes in goodwill [line items]    
Goodwill Begining Balance 86 86
Additional recognition 0  
Impairment losses recognized in profit or loss for the year 0  
Total increase (decrease) 0  
Goodwill Ending Balance 86 86
Soquimich European Holding B.V. | Gross carrying amount    
Disclosure of reconciliation of changes in goodwill [line items]    
Goodwill Begining Balance 11,383 11,383
Additional recognition 0  
Impairment losses recognized in profit or loss for the year (11,374)  
Total increase (decrease) (11,374)  
Goodwill Ending Balance 9 11,383
SQM Holland B.V. | Gross carrying amount    
Disclosure of reconciliation of changes in goodwill [line items]    
Goodwill Begining Balance   7,370
Total increase (decrease)   (7,370)
Goodwill Ending Balance    
SQM Potasio S.A. | Gross carrying amount    
Disclosure of reconciliation of changes in goodwill [line items]    
Goodwill Begining Balance 724 724
Additional recognition 0  
Impairment losses recognized in profit or loss for the year 0  
Total increase (decrease) 0  
Goodwill Ending Balance $ 724 $ 724