v3.25.2
Other Intangible Assets - Summary of Other Intangible Assets (Detail) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Gross cost at January 1 $ 331.8    
Additions 10.8    
Exchange effect 16.7    
Gross cost at March 31 359.3    
Accumulated amortization at January 1 (266.4)    
Amortization expense (5.9) $ (6.0)  
Exchange effect (8.7)    
Accumulated amortization at March 31 (281.0)    
Net book amount at March 31 $ 78.3   $ 65.4