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Summary of Significant Accounting Policies - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total $ 6,347.6 $ 5,784.5 $ 6,821.3 $ 5,706.2
Accumulated Other Comprehensive Income (Loss)        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total (329.8) (297.3) $ (322.2) $ (247.5)
Currency translation adjustments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total (327.9) (292.8)    
Unrealized losses on defined benefit plans        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total $ (1.9) $ (4.5)