Quarterly report pursuant to Section 13 or 15(d)

Restructuring Activities - Additional Information (Detail)

v3.24.3
Restructuring Activities - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Mar. 31, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]            
Total cost of transformation program $ 0.0   $ 4.6 $ 9.4 $ 42.0  
Restructuring Program [Member]            
Restructuring Cost and Reserve [Line Items]            
Total cost of transformation program $ 2.7     68.2    
Minimum [Member]            
Restructuring Cost and Reserve [Line Items]            
Expected Pre-tax charges       88.6    
Minimum [Member] | Organizational Design Transformation Program            
Restructuring Cost and Reserve [Line Items]            
Expected Pre-tax charges           $ 90.0
Minimum [Member] | Restructuring Program [Member]            
Restructuring Cost and Reserve [Line Items]            
Expected Pre-tax charges   $ 70.0   $ 68.2