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

Restructuring Activities - Schedule of Changes in the Liabilities Related to the Restructuring Program (Detail)

v3.25.4
Restructuring Activities - Schedule of Changes in the Liabilities 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 Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] General and Administrative Expense General and Administrative Expense
Expenses $ 7.0 $ 69.1
Ending Balance 1.3 3.7
Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Cash payments (9.4) (65.4)
Non-cash items and other 0.0 0.0
Professional Fees [Member]    
Restructuring Cost and Reserve [Line Items]    
Expenses (0.5) 4.6
Ending Balance 0.0 0.5
Professional Fees [Member] | Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Cash payments 0.0 (4.1)
Non-cash items and other 0.0 0.0
Retention and Separation [Member]    
Restructuring Cost and Reserve [Line Items]    
Expenses 7.5 64.5
Ending Balance 1.3 3.2
Retention and Separation [Member] | Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Cash payments (9.4) (61.3)
Non-cash items and other 0.0 0.0
Others [Member]    
Restructuring Cost and Reserve [Line Items]    
Expenses 0.0 0.0
Ending Balance 0.0 0.0
Others [Member] | Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Cash payments 0.0 0.0
Non-cash items and other $ 0.0 $ 0.0