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Comprehensive Income - Summary of the Tax Effects Allocated to Each Component of Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss)      
Pre-Tax $ 45.6 $ (145.9) $ 11.2
Tax (Expense) Benefit (3.7) 3.1 (4.0)
Other comprehensive income (loss), net of tax 41.9 (142.8) 7.2
Foreign currency translation gain      
Accumulated Other Comprehensive Income (Loss)      
Pre-Tax 44.8 (144.1) 10.3
Tax (Expense) Benefit (3.7) 2.8 (3.5)
Other comprehensive income (loss), net of tax 41.1 (141.3) 6.8
Change in net realized and unrealized gain (loss) on derivative financial instruments      
Accumulated Other Comprehensive Income (Loss)      
Pre-Tax 0.3 (0.5) 0.9
Tax (Expense) Benefit 0.0 0.0 (0.5)
Other comprehensive income (loss), net of tax 0.3 (0.5) $ 0.4
Change in net unrealized gain (loss) on available-for-sale debt securities      
Accumulated Other Comprehensive Income (Loss)      
Pre-Tax 0.5 (1.3)  
Tax (Expense) Benefit 0.0 0.3  
Other comprehensive income (loss), net of tax $ 0.5 $ (1.0)