Restructuring, Impairment and Other Charges - Schedule of Changes in the Restructuring Reserve (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	$ 88.6	$ 52.5
Restructuring and Other Charges	41.0	106.6
Foreign Exchange and Other	(0.4)	1.4
Cash Paid	(59.8)	(71.9)
Balance at the end	69.4	88.6
MEPP withdrawal obligations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	70.2	40.5
Restructuring and Other Charges	10.7	40.0
Cash Paid	(31.9)	(10.3)
Balance at the end	49.0	70.2
Employee terminations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	6.2	3.5
Restructuring and Other Charges	8.4	32.8
Cash Paid	(9.3)	(30.1)
Balance at the end	5.3	6.2
Other
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	12.2	8.5
Restructuring and Other Charges	21.9	33.8
Foreign Exchange and Other	(0.4)	1.4
Cash Paid	(18.6)	(31.5)
Balance at the end	$ 15.1	$ 12.2