Restructuring - Summary of Liabilities Recognized Related to Restructuring Plan (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost And Reserve [Line Items]
Additions	$ 32.1
Ending Balance	32.1
Expense estimated to be recognized for the Restructuring Plan	240.0
2021 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Expense estimated to be recognized for the Restructuring Plan	240.0
2021 Restructuring Plan [Member] | Employee Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Additions	19.5
Ending Balance	19.5
Expense estimated to be recognized for the Restructuring Plan	62.0
2021 Restructuring Plan [Member] | Contract Termination [Member]
Restructuring Cost And Reserve [Line Items]
Additions	2.3
Ending Balance	2.3
Expense estimated to be recognized for the Restructuring Plan	167.0
2021 Restructuring Plan [Member] | Other Restructuring [Member]
Restructuring Cost And Reserve [Line Items]
Additions	10.3
Ending Balance	10.3
Expense estimated to be recognized for the Restructuring Plan	11.0
2019 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	64.7	$ 27.3
Additions	78.4	108.2	$ 36.3
Cash payments	(107.2)	(72.2)	(9.0)
Foreign currency exchange rate changes	(1.7)	1.4
Ending Balance	34.2	64.7	27.3
Expense estimated to be recognized for the Restructuring Plan	375.0
Expense incurred since the start of the 2019 Restructuring Plan	222.9
2019 Restructuring Plan [Member] | Employee Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	38.7	23.2
Additions	7.4	55.3	23.2
Cash payments	(29.7)	(41.2)
Foreign currency exchange rate changes	(1.6)	1.4
Ending Balance	14.8	38.7	23.2
Expense estimated to be recognized for the Restructuring Plan	180.0
Expense incurred since the start of the 2019 Restructuring Plan	85.9
2019 Restructuring Plan [Member] | Other Restructuring [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	15.1	4.1
Additions	52.5	37.1	13.1
Cash payments	(64.6)	(26.1)	(9.0)
Foreign currency exchange rate changes	(0.1)
Ending Balance	2.9	15.1	$ 4.1
Expense estimated to be recognized for the Restructuring Plan	155.0
Expense incurred since the start of the 2019 Restructuring Plan	102.7
2019 Restructuring Plan [Member] | Contract Termination [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	10.9
Additions	18.5	15.8
Cash payments	(12.9)	(4.9)
Ending Balance	16.5	$ 10.9
Expense estimated to be recognized for the Restructuring Plan	40.0
Expense incurred since the start of the 2019 Restructuring Plan	$ 34.3