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Goodwill and Acquired Intangible Assets, Net (Details 1) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Goodwill and Finite-lived Intangible Assets [Roll Forward]      
Acquired Intangible Assets, Balance $ 167.6 $ 188.3  
Acquired Intangible Assets, Increases (decreases):      
Acquired Intangible Assets, Acquisitions (see footnote 6) 51.0  
Acquired Intangible Assets, Amortization (21.7) (24.5) $ (27.0)
Acquired Intangible Assets, Other (primarily changes in foreign currency exchange rates) (8.0) 3.8  
Acquired Intangible Assets, Balance 188.9 167.6 188.3
Goodwill, Balance 847.5 828.3  
Goodwill, Increases (decreases):      
Goodwill, Acquisitions (see footnote 6) 50.2 1.3  
Goodwill, Amortization  
Goodwill, Other (primarily changes in foreign currency exchange rates) (38.5) 17.9  
Goodwill, Balance 859.2 847.5 828.3
Total Intangible Assets, Balance 1,015.1 1,016.6  
Total Intangible Assets, Increases (decreases):      
Total Intangible Assets, Acquisitions (see footnote 6) 101.2 1.3  
Total Intangible Assets, Amortization (21.7) (24.5)  
Total Intangible Assets, Other (primarily changes in foreign currency exchange rates) (46.5) 21.7  
Total Intangible Assets, Balance $ 1,048.1 $ 1,015.1 $ 1,016.6