Quarterly report pursuant to Section 13 or 15(d)

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

v3.24.3
Restructuring Activities - Schedule of Costs Related to the Restructuring Program (Detail)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
Sep. 30, 2024
USD ($)
Restructuring Cost and Reserve [Line Items]    
Restructuring Costs, Total $ 2.7 $ 68.2
Cumulative cost incurred 88.6 88.6
Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Cumulative cost incurred 68.2 68.2
Professional Fees [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring Costs, Total 0.3 4.5
Cumulative cost incurred 26.4 26.4
Professional Fees [Member] | Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Cumulative cost incurred 4.5 4.5
Retention and Separation [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring Costs, Total 2.4 63.7
Cumulative cost incurred 61.3 61.3
Retention and Separation [Member] | Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Cumulative cost incurred 63.7 63.7
Others [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring Costs, Total 0.0 0.0
Cumulative cost incurred 0.9 0.9
Others [Member] | Restructuring Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Cumulative cost incurred $ 0.0 $ 0.0