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Contingencies and restrictions (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Oct. 04, 2022
Sep. 29, 2022
Jan. 27, 2022
Jul. 15, 2021
Jan. 07, 2021
Oct. 31, 2020
Apr. 14, 2020
Mar. 24, 2017
Aug. 26, 2016
Jun. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Aug. 31, 2004
Aug. 31, 1996
Statement [Line Items]                            
Lawsuits, domicile of litigation                     19th Civil Court of Santiago      
Guarantee obligations                     $ 717      
Environmental loss contingencies component amount           $ 9,000                
Mining assets                     60,284 $ 38,241    
Tax contingencies, estimates possible amount   $ 745,300                        
Third tax and customs court | Tax Period 2012 to 2014                            
Statement [Line Items]                            
Tax Contingencies, Dispute Amount                 $ 17,800          
Tax contingencies, contested tax                 11,500          
Interest and associated fines                 $ 6,300          
Third tax and customs court | Tax Period 2015 to 2016                            
Statement [Line Items]                            
Tax Contingencies, Dispute Amount               $ 8,600            
Tax contingencies, contested tax               6,900            
Interest and associated fines               400            
Tax contingencies, assessed excess tax amount               $ 1,300            
Third tax and customs court | Tax Period 2017 to 2018                            
Statement [Line Items]                            
Tax Contingencies, Dispute Amount       $ 63,900                    
Tax contingencies, contested tax       30,200                    
Interest and associated fines       16,100                    
Tax contingencies, assessed excess tax amount       $ 17,600                    
General Water Bureau                            
Statement [Line Items]                            
Loss Contingency, Damages Awarded, Value             $ 4,180              
Ocaa y Vega Limited                            
Statement [Line Items]                            
Loss Contingency, Damages Awarded, Value         $ 377                  
Soquimich Comercial S.A.                            
Statement [Line Items]                            
Lawsuits, damages owed value                     1,050      
SQM Salar                            
Statement [Line Items]                            
Loss Contingency, Damages Awarded, Value     $ 48,100                      
Litigation charges                       $ 48,100    
SQM Salar | Tax Period 2019                            
Statement [Line Items]                            
Tax Contingencies, Dispute Amount   36,800                        
Tax contingencies, assessed excess tax amount   $ 9,700                        
SQM Salar | Non-current tax assets                            
Statement [Line Items]                            
Mining assets                     $ 127,100      
Lawsuit three                            
Statement [Line Items]                            
Lawsuits, name of plaintiff                     city of Pomona in the state of California      
Lawsuits, name of defendant                     SQM NA      
Lawsuits, lawsuit filing date                     December 2010      
Lawsuits, domicile of litigation                     US District Court for the Central District of California      
Lawsuits, allegations                     payment of expenses and other values related to treatment of groundwater to make it apt for consumption, which involved the extraction of perchlorate in this water, which allegedly came from Chilean fertilizers      
Lawsuit four                            
Statement [Line Items]                            
Lawsuits, name of plaintiff                     the city of Lindsay in California, United States      
Lawsuits, name of defendant                     SQM NA      
Lawsuits, lawsuit filing date                     December 2010      
Lawsuits, domicile of litigation                     US District Court for the Central District of California      
Lawsuits, allegations                     payment of expenses and other values related to treatment of groundwater to make it apt for consumption, which involved the extraction of perchlorate in this water, which allegedly came from Chilean fertilizers      
Lawsuit five                            
Statement [Line Items]                            
Lawsuits, name of defendant                     SQM Nitratos      
Lawsuits, lawsuit filing date                     May 2014      
Lawsuits, domicile of litigation                     18th Civil Court of Santiago      
Lawsuits, allegations                     for its alleged extracontractual liability derived from an explosion occurring in 2010 in the vicinity of the town of Baquedano, which caused the death of six workers      
Lawsuits, litigation status                     On May 7, 2019, the 18th Civil Court of Santiago dismissed the claim. The case currently is in the Santiago Court of Appeals, which will make a determination on the motion for appeal and cassation brought about on behalf of the plaintiff.      
Lawsuits, nominal value                     $ 1,200      
Lawsuit six                            
Statement [Line Items]                            
Lawsuits, name of plaintiff                     Transportes Buen Destino S.A.      
Lawsuits, name of defendant                     SQM Salar      
Lawsuits, lawsuit filing date                     January 2018      
Lawsuits, domicile of litigation                     arbitration claim under CAM rules      
Lawsuits, allegations                     controversies resulting from the execution of transport contracts for lithium brine and transport of salts      
Lawsuits, litigation status                     currently in the evidence stage      
Lawsuits, nominal value                     $ 3,000      
Lawsuit seven                            
Statement [Line Items]                            
Lawsuits, name of plaintiff                     representatives Claudia Nathalie Mix Jiménez, Gael Fernanda Yeomans Araya, Camila Ruzlay Rojas Valderrama      
Lawsuits, name of defendant                     Corfo      
Lawsuits, lawsuit filing date                     September 2018      
Lawsuits, allegations                     Salar de Atacama Project Contract signed between Corfo and SQM Salar.      
Lawsuits, litigation status                     discussion stage      
Lawsuit eight                            
Statement [Line Items]                            
Lawsuits, name of plaintiff                     The Company and FPC Ingeniería y Construcción SpA      
Lawsuits, lawsuit filing date                     May 2019      
Lawsuits, allegations                     alleged extracontractual liability derived from the traffic accident occurring      
Lawsuits, litigation status                     on March 5, 2018, involving the overturn of a truck owned by FPC and the subsequent death of its two occupants, both employees of FPC. The four children of one of the deceased workers are the plaintiffs in this case and are seeking compensation for moral damages.      
Lawsuits, nominal value                     $ 1,200      
Lawsuit nine                            
Statement [Line Items]                            
Lawsuits, damages owed value                   $ 493        
Lawsuit ten                            
Statement [Line Items]                            
Lawsuits, name of plaintiff                     Sierra Gorda S.C.M      
Lawsuits, name of defendant                     the Company      
Lawsuits, lawsuit filing date                     December 16, 2011      
Lawsuits, nominal value                     $ 46,000      
Interest and associated fines $ 3,600                          
Lawsuit fifteen                            
Statement [Line Items]                            
Lawsuits, nominal value                     $ 542,000      
Law Suit One A | Nitratos Naturais do Chile Ltda. | Provision for taxes other than income tax | Appeal pending | Fazoanda Do Estado De Sao Paulo                            
Statement [Line Items]                            
Law suits fines penalties and damages payable                           $ 492
Law Suit One B | Nitratos Naturais do Chile Ltda. | Provision for taxes other than income tax | Appeal pending | Fazoanda Do Estado De Sao Paulo                            
Statement [Line Items]                            
Law suits fines penalties and damages payable                         $ 265