Quarterly report pursuant to Section 13 or 15(d)

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

v3.24.3
Restructuring Activities - Schedule of Changes in the Liabilities Related to the Transformation Program (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     $ 9.2  
Expenses $ 0.0 $ 4.6 9.4 $ 42.0
Cash payments     (13.4)  
Non-cash items and other     0.0  
Ending Balance 5.2   5.2  
Professional Fees [Member]        
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     1.0  
Expenses 0.0 2.1 1.5 6.2
Cash payments     (2.3)  
Non-cash items and other     0.0  
Ending Balance 0.2   0.2  
Retention and Separation [Member]        
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     8.2  
Expenses 0.0 2.2 7.8 35.3
Cash payments     (11.0)  
Non-cash items and other     0.0  
Ending Balance 5.0   5.0  
Other [Member]        
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     0.0  
Expenses 0.0 $ 0.3 0.1 $ 0.5
Cash payments     (0.1)  
Non-cash items and other     0.0  
Ending Balance $ 0.0   $ 0.0