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Investment in associate - Narrative (Details) - t
t in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of associates [line items]    
Percentage of sales 100.00% 100.00%
Atlas Methanol Company Unlimited    
Disclosure of associates [line items]    
Annual methanol production facility owned (in tonnes) 1.8  
Ownership rate 100.00%  
Atlas Methanol Company Unlimited | Fixed-price contracts | Methanol | 2005 through 2014    
Disclosure of associates [line items]    
Percentage of sales 50.00%  
Atlas Methanol Company Unlimited | Fixed-price contracts | Methanol | Late 2014 through 2019    
Disclosure of associates [line items]    
Percentage of sales 10.00%  
Atlas Methanol Company Unlimited    
Disclosure of associates [line items]    
Percentage of ownership interest in associates 63.10% 63.10%