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Transactions with related parties (Details 1) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of transactions between related parties [line items]      
Benefits other than equity-based compensation $ 29.6 $ 25.0 $ 30.2
Post-employment benefits 2.8 2.5 2.7
Equity-based compensation 47.4 42.5 46.3
Total 79.8 70.0 79.2
Key management personnel of entity or parent [member]      
Disclosure of transactions between related parties [line items]      
Benefits other than equity-based compensation 25.0 20.3 25.6
Post-employment benefits 2.8 2.5 2.7
Equity-based compensation 42.6 37.3 41.1
Total 70.4 60.1 69.4
Non-Executive Director [member]      
Disclosure of transactions between related parties [line items]      
Benefits other than equity-based compensation 4.6 4.7 4.6
Equity-based compensation 4.8 5.2 5.2
Total $ 9.4 $ 9.9 $ 9.8