Income Taxes - Components of Comprehensive Provision for Income Taxes Allocation (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Schedule Of Income Tax [Line Items]
Expected tax expense (benefit) at U.S. federal statutory income tax rate of 35%	$ (10.7)	$ 7.6
Incremental net tax on earnings and losses of non-U.S. and U.S. subsidiaries	2.4	0.5
Non-U.S. tax rates	0.2	(1.1)
Adjustment to the reserve for uncertain tax positions, net	0.2	(2.7)
Nondeductible expenses	0.1	0.5
Domestic production activities deduction	(0.3)	(0.8)
U.S. state income taxes and other, net	(0.5)	0.3
Income tax expense (benefit)	(8.6)	4.3
Comprehensive provision for income taxes allocable to:
Income tax expense (benefit)	(8.6)	4.3
Other comprehensive income (loss):
Marketable securities	(0.2)	(0.2)
Currency translation	2.8	(16.2)
Interest rate swap	(2.1)
Total	(7.5)	(11.0)
Defined Benefit Pension Plans
Other comprehensive income (loss):
Defined benefit plans	0.8	1.3
OPEB
Other comprehensive income (loss):
Defined benefit plans	$ (0.2)	$ (0.2)