v3.25.2
Plant Closure Provisions - Movements in Plant Closure and Restructuring Provisions (Detail) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Restructuring and Related Activities [Abstract]    
Beginning Balance $ 60.3  
Charge for the period 4.1  
Utilized in the period (2.6)  
Exchange effect 7.0  
Ending Balance 68.8  
Due within one year (5.0) $ (5.0)
Due after one year $ 63.8 $ 55.3