Quarterly report [Sections 13 or 15(d)]

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

v3.26.1
Restructuring Activities - Schedule of Changes in the Liabilities Related to the Technology Realignment Program (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     $ 3.9  
Expenses $ 1.1 $ 3.6 3.5 $ 3.6
Cash payments     (6.6)  
Non-cash items and other     0.0  
Ending balance 0.8   0.8  
Professional Fees [Member]        
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     0.0  
Expenses 0.0 0.0 0.0 0.0
Cash payments     0.0  
Non-cash items and other     0.0  
Ending balance 0.0   0.0  
Retention and Separation [Member]        
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     3.9  
Expenses 1.1 3.6 3.5 3.6
Cash payments     (6.6)  
Non-cash items and other     0.0  
Ending balance 0.8   0.8  
Other [Member]        
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     0.0  
Expenses 0.0 $ 0.0 0.0 $ 0.0
Cash payments     0.0  
Non-cash items and other     0.0  
Ending balance $ 0.0   $ 0.0