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Share-based payment obligation (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended
Mar. 31, 2023
USD ($)
$ / shares
Mar. 31, 2023
USD ($)
Option
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Expense from share-based payment transactions   $ 3.3
Options granted | Option   0
Share options Forfeited | Option   0
Dividends planned for the near future $ 0.0 $ 0.0
Omnibus share-based payment plans    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Fair value of options granted, at grant date $ 32.4  
Assumption of forfeiture rate 7.00%  
Expected charge over remaining term of outstanding share options $ 12.2 $ 12.2
Expected dividend, share options granted $ 0.0  
Omnibus share-based payment plans | Bottom of range    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share price assumption | $ / shares $ 11.39  
Omnibus share-based payment plans | Top of range    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Share price assumption | $ / shares $ 11.55  
Omnibus share-based payment plans, RSUs with non-market conditions    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Fair value of options granted, at grant date $ 17.4  
Omnibus share-based payment plans, PSUs with non-market conditions    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Fair value of options granted, at grant date 10.9  
Omnibus share-based payment plans, PSUs with market conditions    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Fair value of options granted, at grant date $ 4.1