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Share-based Compensation - Allocated Share-based Compensation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Share-based compensation $ 16.1 $ 12.3 $ 8.4
Income tax benefit (3.1) (2.3) (1.5)
Total share-based compensation expense, net of tax 13.0 10.0 6.9
Stock option expense      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Share-based compensation 1.5 1.7 0.6
ESPP expense      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Share-based compensation 0.7 0.6 0.5
RSU, DSU and PSU expense      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Share-based compensation $ 13.9 $ 10.0 $ 7.3