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Financial instruments and financial risk factors - Assets measured at fair value (Details) - Recurring fair value measurement - USD ($)
$ in Millions
Dec. 31, 2022
Oct. 31, 2022
Disclosure of detailed information about financial instruments [line items]    
Financial assets $ 4.3 $ 1.5
Accounts receivable    
Disclosure of detailed information about financial instruments [line items]    
Financial assets   1.5
Level 2    
Disclosure of detailed information about financial instruments [line items]    
Financial assets 4.3 1.5
Level 2 | Accounts receivable    
Disclosure of detailed information about financial instruments [line items]    
Financial assets $ 4.3 $ 1.5