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Restructuring and Other Charges - Reconciliation of Restructuring Liability (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     $ 5.7 $ 7.6
Provision $ 30.2 $ 3.6 33.1 11.5
Cash Expenditures     (7.5) [1] (12.7) [2]
Ending Balance 31.3 6.4 31.3 6.4
Workforce Reduction Costs [Member]        
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     4.7 6.9
Provision     24.5 9.6
Cash Expenditures     (7.1) [1] (11.2) [2]
Ending Balance 22.1 5.3 22.1 5.3
Other [Member]        
Restructuring Cost and Reserve [Line Items]        
Beginning Balance     1.0 0.7
Provision     8.6 1.9
Cash Expenditures     (0.4) [1] (1.5) [2]
Ending Balance $ 9.2 $ 1.1 $ 9.2 $ 1.1
[1] (a) Cash expenditures primarily relate to severance charges.
[2] (a) Cash expenditures primarily relate to severance charges.