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Disclosures on equity - Non-controlling Interests (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Noncontrolling interests Explanatory [Line Items]      
Profit (loss), attributable to non-controlling interests $ 7,973 $ 6,751 $ 3,841
Equity, noncontrolling interests 35,369 34,451  
Dividends paid to non-controlling interests $ 7,370 12,408  
SQM Potasio S.A.      
Disclosure Of Noncontrolling interests Explanatory [Line Items]      
Proportion of ownership interests held by non-controlling interests 0.00%    
Profit (loss), attributable to non-controlling interests $ 0 0  
Equity, noncontrolling interests 0 0  
Dividends paid to non-controlling interests $ 0 0  
Ajay SQM Chile S.A.      
Disclosure Of Noncontrolling interests Explanatory [Line Items]      
Proportion of ownership interests held by non-controlling interests 4900000.00%    
Profit (loss), attributable to non-controlling interests $ 2,415 769  
Equity, noncontrolling interests 8,986 8,382  
Dividends paid to non-controlling interests $ 1,812 577  
Soquimich Comercial S.A.      
Disclosure Of Noncontrolling interests Explanatory [Line Items]      
Proportion of ownership interests held by non-controlling interests 3936168.00%    
Profit (loss), attributable to non-controlling interests $ 5,558 5,926  
Equity, noncontrolling interests 26,383 26,665  
Dividends paid to non-controlling interests $ 5,558 11,831  
Comercial Agrorama Ltda.      
Disclosure Of Noncontrolling interests Explanatory [Line Items]      
Proportion of ownership interests held by non-controlling interests 3000000.00%    
Profit (loss), attributable to non-controlling interests $ 0 56  
Equity, noncontrolling interests 0 (596)  
Dividends paid to non-controlling interests $ 0 0  
SQM Indonesia S.A.      
Disclosure Of Noncontrolling interests Explanatory [Line Items]      
Proportion of ownership interests held by non-controlling interests 2000000.00%    
Profit (loss), attributable to non-controlling interests $ 0 0  
Equity, noncontrolling interests 0 0  
Dividends paid to non-controlling interests $ 0 0  
SQM Thailand Limited      
Disclosure Of Noncontrolling interests Explanatory [Line Items]      
Proportion of ownership interests held by non-controlling interests 0.002%    
Profit (loss), attributable to non-controlling interests $ 0 0  
Equity, noncontrolling interests 0 0  
Dividends paid to non-controlling interests $ 0 $ 0