Segment Information - Reconciliation of Segment Operating Income to Consolidated Loss Before Income Taxes (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit (loss)	$ 101,800,000	$ 21,800,000	[1]
Interest expense	(16,600,000)	(5,700,000)
Other income (expense), net	(22,600,000)	(32,900,000)	[1]
Cost reduction charges	0	(25,400,000)
Total income (loss) before income taxes	62,600,000	(16,800,000)
Other income (expense), net
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost reduction charges		(5,300,000)
Other income (expense), net | Net foreign currency translation adjustment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost reduction charges		(5,300,000)
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit (loss)	99,100,000	40,300,000
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Cost reduction charges	2,900,000	(20,100,000)
Corporate and eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit (loss)	$ (200,000)	$ 1,600,000

[1] *Amounts were changed to conform to the current-year presentation. See Note 3.