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Share-based payment arrangements - Expenses recognized in profit or loss (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Long term incentive plan 2016, 2017, 2018, 2019, 2020 And transaction based incentive plan 2019      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Provisions (benefit) for employee benefits $ 3.9 $ 9.2 $ 1.3