Components of Other Non-Operating Income (Expense), Net (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Nonoperating Income (Expense) [Abstract]
FX gain (loss)	$ (11.4)	$ (16.8)	$ 50.1
Net periodic pension costs - other components	10.3	8.4	7.3
Income from investments in non-consolidated affiliates	13.8	13.3	11.4
Legacy tax			1.6
Other	6.1	(1.2)	(6.0)
Total	$ 18.8	$ 3.7	$ 64.4