Other Non-Operating Interest (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Component of Other Expense Income Nonoperating [Line Items]
FX gain/(loss)	$ 4.0
Joint venture income	1.9	$ 1.9
Other	(0.3)	0.6
Total	$ 5.6	$ 2.5