Gain and Loss Activity Related to Derivative Financial Instruments Not Designated as Effective Hedges (Detail) (Derivatives Not Designated As Effective Hedges, USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Income	$ (0.5)	$ (2.7)	$ 6.0	$ (4.1)
Cash Flow Hedging | Foreign Exchange Contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Income	(0.8)	(1.3)	5.6	(3.2)
Cash Flow Hedging | Commodity Contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in Income	$ 0.3	$ (1.4)	$ 0.4	$ (0.9)