Annual report [Section 13 and 15(d), not S-K Item 405]

Restructuring Activities - Schedule of Costs Related to the Restructuring Program (Detail)

v3.25.4
Restructuring Activities - Schedule of Costs Related to the Restructuring Program (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]    
Restructuring Costs, Total $ 7.0 $ 69.1
Cumulative cost incurred   92.5
Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring Costs, Total 7.0 69.1
Cumulative cost incurred 76.1  
Professional Fees [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring Costs, Total (0.5) 4.6
Cumulative cost incurred   26.5
Professional Fees [Member] | Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Cumulative cost incurred 4.1  
Retention and Separation [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring Costs, Total 7.5 64.5
Cumulative cost incurred   64.4
Retention and Separation [Member] | Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Cumulative cost incurred 72.0  
Others [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring Costs, Total 0.0 0.0
Cumulative cost incurred   $ 1.6
Others [Member] | Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Cumulative cost incurred $ 0.0