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Provisions and other non-financial liabilities - Narrative (Details)
 12 Months Ended
Dec. 31, 2022
USD ($)
ha
Minimum  
Disclosure of other provisions [line items]  
Research and development expense $ 10,000,000
Minimum | Potassium-lithium operations  
Disclosure of other provisions [line items]  
Discount rate evaluation horizon 8
Minimum | Nitrate-iodine operations  
Disclosure of other provisions [line items]  
Discount rate evaluation horizon 11
Maximum  
Disclosure of other provisions [line items]  
Research and development expense $ 15,000,000
Maximum | Potassium-lithium operations  
Disclosure of other provisions [line items]  
Discount rate evaluation horizon 25
Maximum | Nitrate-iodine operations  
Disclosure of other provisions [line items]  
Discount rate evaluation horizon 22
SQM Salar  
Disclosure of other provisions [line items]  
Area of land | ha 140,000
Area of land, entitled | ha 81,920
SQM  
Disclosure of other provisions [line items]  
Percentage of entity's revenue 1.70%
SQM | Minimum  
Disclosure of other provisions [line items]  
Research and development expense $ 10,800,000
SQM | Maximum  
Disclosure of other provisions [line items]  
Research and development expense $ 18,900,000