v3.24.0.1
Foreign currency risk - Schedule of Foreign Exchange Rates (Details)
 12 Months Ended
Dec. 31, 2023
$ / SFr
Dec. 31, 2022
$ / SFr
Dec. 31, 2021
AUD 1      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Closing foreign exchange rate 0.57 0.63  
Average foreign exchange rate 0.61 0.67 0.70
BRL 100      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Closing foreign exchange rate 17.32 17.68  
Average foreign exchange rate 18.16 18.49 17.23
CAD 1      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Closing foreign exchange rate 0.63 0.68  
Average foreign exchange rate 0.68 0.74 0.73
CNY 100      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Closing foreign exchange rate 11.85 13.26  
Average foreign exchange rate 13.03 14.46 14.23
EUR 1      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Closing foreign exchange rate 0.93 0.99  
Average foreign exchange rate 0.99 1.02 1.10
GBP 1      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Closing foreign exchange rate 1.07 1.11  
Average foreign exchange rate 1.13 1.20 1.27
JPY 100      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Closing foreign exchange rate 0.60 0.70  
Average foreign exchange rate 0.66 0.75 0.85
HKD 1      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Closing foreign exchange rate 0.11 0.12  
Average foreign exchange rate 0.12 0.13 0.12
USD 1      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Closing foreign exchange rate 0.84 0.93  
Average foreign exchange rate 0.92 0.96 0.92