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Share-Based Payments - Compensation Expense (Details) - Options, RSUs, DSUs and PSUs Awards - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-tax share-based compensation expense $ 33.6 $ 32.1 $ 24.2
Tax benefit (5.9) (5.5) (4.3)
After-tax share-based compensation expense $ 27.7 $ 26.6 $ 19.9