Components of Other Non-Operating Income (Expense), Net (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Component Of Other Expense Income Nonoperating [Line Items]
FX gain (loss)	$ 0	$ (5.9)	$ 2.6
Legacy Tax	19.2	12.8	6.4
Joint venture income	8.8	4.8	6.8
Other	(1.5)	(1.3)	(2.3)
Other non-operating income (expense), net	$ 26.5	$ 10.4	$ 13.5