Valuation and Qualifying Accounts and Reserves - Components of Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 8.4	$ 10.5	$ 12.8
Charged to Costs and Expenses	0.3	(0.1)	1.1
Deductions	(2.5)	(2.1)	(2.1)
Foreign Currency Translation and Other	0.3	0.1	(1.3)
Balance at End of Year	6.5	8.4	10.5
Inventory obsolescence reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	13.4	12.2	17.9
Charged to Costs and Expenses	3.5	3.8	0.0
Deductions	(2.7)	(2.1)	(3.8)
Foreign Currency Translation and Other	1.3	(0.5)	(1.9)
Balance at End of Year	15.5	13.4	12.2
Valuation allowance on deferred tax assets
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	167.7	208.9	164.1
Charged to Costs and Expenses	3.4	(37.4)	(51.4)
Deductions	0.0		0.0
Foreign Currency Translation and Other	18.1	(3.8)	96.2
Balance at End of Year	$ 189.2	$ 167.7	$ 208.9