Gain and Loss Activity Related to Derivative Financial Instruments Not Designated as Effective Hedges (Detail) (Derivatives that are not designated as effective hedges, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Income	$ (4.6)	$ (1.8)	$ (6.1)
Cash flow derivatives | Foreign Exchange Contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Income	4.3	(2.7)	(5.7)
Cash flow derivatives | Commodity Contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Income	$ (8.9)	$ 0.9	$ (0.4)