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Summary of Significant Accounting Policies - Schedule of Changes in Restructuring Reserve (Parenthetical) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]      
Restructuring reserve $ 46.5    
Costs paid or utilized 93.7 $ 72.4  
Americas | United States      
Restructuring Cost and Reserve [Line Items]      
Restructuring reserve 4.0 3.7 $ 0.6
Severance costs 6.0 7.7  
Office closure costs 5.8 4.6  
Other costs 0.1    
Southern Europe | France      
Restructuring Cost and Reserve [Line Items]      
Restructuring reserve 1.2 2.5 0.9
Severance costs 1.3 2.1  
Other costs 0.5 0.4  
Costs paid or utilized 3.1 0.9  
Southern Europe | Italy      
Restructuring Cost and Reserve [Line Items]      
Restructuring reserve 2.0 1.0 $ 0.0
Severance costs 1.9 1.6  
Office closure costs   $ 0.6  
Other costs 0.1    
Costs paid or utilized $ 1.0