Restructuring - Summary of Liabilities Recognized Related to Restructuring Plan (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
2021 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	$ 32.1
Expenses	29.9
Cash payments	(46.4)
Foreign currency exchange rate changes	0.2
Ending Balance	15.8
Expense incurred since the start of the Restructuring Plan	62.0
Expense estimated to be recognized for the Restructuring Plan	240.0	$ 240.0
2021 Restructuring Plan [Member] | Employee Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	19.5
Expenses	21.3
Cash payments	(28.4)
Foreign currency exchange rate changes	0.2
Ending Balance	12.6
Expense incurred since the start of the Restructuring Plan	40.8
Expense estimated to be recognized for the Restructuring Plan	50.0
2021 Restructuring Plan [Member] | Contract Termination [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	2.3
Expenses	3.4
Cash payments	(3.0)
Ending Balance	2.7
Expense incurred since the start of the Restructuring Plan	5.7
Expense estimated to be recognized for the Restructuring Plan	165.0
2021 Restructuring Plan [Member] | Other Restructuring [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	10.3
Expenses	5.2
Cash payments	(15.0)
Ending Balance	0.5
Expense incurred since the start of the Restructuring Plan	15.5
Expense estimated to be recognized for the Restructuring Plan	25.0
2019 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	31.3
Expenses	10.0
Cash payments	(10.6)
Foreign currency exchange rate changes	(1.4)
Ending Balance	29.3
Expense incurred since the start of the Restructuring Plan	232.9
Expense estimated to be recognized for the Restructuring Plan	375.0
2019 Restructuring Plan [Member] | Employee Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	14.8
Expenses	(0.5)
Cash payments	(3.0)
Foreign currency exchange rate changes	(0.5)
Ending Balance	10.8
Expense incurred since the start of the Restructuring Plan	85.4
Expense estimated to be recognized for the Restructuring Plan	180.0
2019 Restructuring Plan [Member] | Contract Termination [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	16.5
Expenses	1.1
Cash payments	(2.5)
Foreign currency exchange rate changes	(0.7)
Ending Balance	14.4
Expense incurred since the start of the Restructuring Plan	35.4
Expense estimated to be recognized for the Restructuring Plan	40.0
2019 Restructuring Plan [Member] | Other Restructuring [Member]
Restructuring Cost And Reserve [Line Items]
Expenses	9.4
Cash payments	(5.1)
Foreign currency exchange rate changes	(0.2)
Ending Balance	4.1
Expense incurred since the start of the Restructuring Plan	112.1
Expense estimated to be recognized for the Restructuring Plan	$ 155.0