Restructuring - Summary of Liabilities Recognized Related to Restructuring Plan (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Dec. 31, 2021
2021 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		$ 32.1
Expenses	$ 22.5	92.8
Cash payments		(91.1)
Foreign currency exchange rate changes		(0.3)
Ending Balance	33.5	33.5
Expense incurred since the start of the Restructuring Plan	124.9	124.9
Expense estimated to be recognized for the Restructuring Plan	220.0	220.0	$ 220.0
2021 Restructuring Plan [Member] | Employee Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		19.5
Expenses	10.4	41.0
Cash payments		(48.3)
Foreign currency exchange rate changes		(0.2)
Ending Balance	12.0	12.0
Expense incurred since the start of the Restructuring Plan	60.5	60.5
Expense estimated to be recognized for the Restructuring Plan	70.0	70.0
2021 Restructuring Plan [Member] | Contract Termination [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		2.3
Expenses	10.7	39.2
Cash payments		(22.7)
Foreign currency exchange rate changes		(0.1)
Ending Balance	18.7	18.7
Expense incurred since the start of the Restructuring Plan	41.5	41.5
Expense estimated to be recognized for the Restructuring Plan	100.0	100.0
2021 Restructuring Plan [Member] | Other Restructuring [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		10.3
Expenses	1.4	12.6
Cash payments		(20.1)
Foreign currency exchange rate changes
Ending Balance	2.8	2.8
Expense incurred since the start of the Restructuring Plan	22.9	22.9
Expense estimated to be recognized for the Restructuring Plan	50.0	50.0
2019 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		31.3
Expenses	8.5	29.0
Cash payments		(21.9)
Foreign currency exchange rate changes		(4.2)
Ending Balance	34.2	34.2
Expense incurred since the start of the Restructuring Plan	237.0	237.0
Expense estimated to be recognized for the Restructuring Plan	375.0	375.0
2019 Restructuring Plan [Member] | Employee Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		14.8
Expenses	1.8	1.5
Cash payments		(2.9)
Foreign currency exchange rate changes		(2.3)
Ending Balance	11.1	11.1
Expense incurred since the start of the Restructuring Plan	80.7	80.7
Expense estimated to be recognized for the Restructuring Plan	160.0	160.0
2019 Restructuring Plan [Member] | Contract Termination [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		16.5
Expenses	(0.1)	1.3
Cash payments		(6.6)
Foreign currency exchange rate changes		(0.9)
Ending Balance	10.3	10.3
Expense incurred since the start of the Restructuring Plan	35.6	35.6
Expense estimated to be recognized for the Restructuring Plan	35.0	35.0
2019 Restructuring Plan [Member] | Other Restructuring [Member]
Restructuring Cost And Reserve [Line Items]
Expenses	6.6	26.2
Cash payments		(12.4)
Foreign currency exchange rate changes		(1.0)
Ending Balance	12.8	12.8
Expense incurred since the start of the Restructuring Plan	120.7	120.7
Expense estimated to be recognized for the Restructuring Plan	$ 180.0	$ 180.0