Quarterly report pursuant to Section 13 or 15(d)

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

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Restructuring Activities - Schedule of Changes in the Liabilities Related to the Restructuring Program (Detail)
$ in Millions
 3 Months Ended
Mar. 31, 2024
USD ($)
Restructuring Cost and Reserve [Line Items]  
Expenses $ 16.7
Ending Balance 14.5
Restructuring Program [Member]  
Restructuring Cost and Reserve [Line Items]  
Cash payments (2.2)
Non-cash items and other 0.0
Professional Fees [Member]  
Restructuring Cost and Reserve [Line Items]  
Expenses 2.8
Ending Balance 0.9
Professional Fees [Member] | Restructuring Program [Member]  
Restructuring Cost and Reserve [Line Items]  
Cash payments (1.9)
Non-cash items and other 0.0
Retention and Separation [Member]  
Restructuring Cost and Reserve [Line Items]  
Expenses 13.9
Ending Balance 13.6
Retention and Separation [Member] | Restructuring Program [Member]  
Restructuring Cost and Reserve [Line Items]  
Cash payments (0.3)
Non-cash items and other 0.0
Others [Member]  
Restructuring Cost and Reserve [Line Items]  
Expenses 0.0
Ending Balance 0.0
Others [Member] | Restructuring Program [Member]  
Restructuring Cost and Reserve [Line Items]  
Cash payments 0.0
Non-cash items and other $ 0.0