Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for credit losses on trade receivables
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 8.2	$ 9.1	$ 6.5
Charged to Costs and Expenses	3.7	2.5	2.3
Deductions	(0.2)	(3.4)	(1.0)
Foreign Currency Translation and Other	0.0	0.0	1.3
Balance at End of Year	11.7	8.2	9.1
Inventory obsolescence reserve
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	19.6	18.1	15.5
Charged to Costs and Expenses	9.0	7.2	4.8
Deductions	(7.8)	(5.6)	(1.4)
Foreign Currency Translation and Other	0.3	(0.1)	(0.8)
Balance at End of Year	21.1	19.6	18.1
Valuation allowance on deferred tax assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	197.6	218.4	189.2
Charged to Costs and Expenses	(1.4)	(14.0)	32.8
Deductions	(6.5)	(2.7)	0.0
Foreign Currency Translation and Other	17.4	(4.1)	(3.6)
Balance at End of Year	$ 207.1	$ 197.6	$ 218.4