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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, 2025
Dec. 31, 2024
Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]      
Restructuring reserve $ 35.1    
Costs paid or utilized 72.9 $ 93.7  
Americas | United States      
Restructuring Cost and Reserve [Line Items]      
Restructuring reserve 0.6 4.0 $ 3.7
Severance costs 2.6 6.0  
Office closure costs 6.0 5.8  
Other costs   0.1  
Southern Europe | France      
Restructuring Cost and Reserve [Line Items]      
Restructuring reserve 3.1 1.2 2.5
Severance costs 5.0 1.3  
Other costs   0.5  
Costs paid or utilized 3.1 3.1  
Southern Europe | Italy      
Restructuring Cost and Reserve [Line Items]      
Restructuring reserve 0.6 2.0 $ 1.0
Severance costs 0.4 1.9  
Office closure costs   1.0  
Other costs   $ 0.1  
Costs paid or utilized $ 1.8