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Share-based payment obligation - Valuation Assumption (Details)
9 Months Ended
Sep. 30, 2022
USD ($)
$ / shares
Omnibus share-based payment plans  
Share-based payment obligations  
Value of options granted $ 32,000,000.0
Assumed forfeiture Rate, Share Options Granted 7.00%
Expected charge over option term, options granted during period $ 17,700,000
Expected dividend as percentage, share options granted 0.00%
Expected dividend, share options granted $ 0
Omnibus share-based payment plans | Minimum  
Share-based payment obligations  
Share price assumption | $ / shares $ 11.39
Omnibus share-based payment plans | Maximum  
Share-based payment obligations  
Share price assumption | $ / shares $ 11.55
Restricted Stock Units (RSU), Omnibus employee share-based payment plans | Non-market conditions  
Share-based payment obligations  
Value of options granted $ 17,000,000.0
Performance Stock Units (PSU) with non-market conditions, Omnibus share-based payment plans | Non-market conditions  
Share-based payment obligations  
Value of options granted 10,900,000
Performance Stock Units (PSU) with market conditions, Omnibus share-based payment plans | Market conditions  
Share-based payment obligations  
Value of options granted $ 4,100,000