Schedule of Gain Loss Recognized in OCI for Derivative Instruments (Detail) (Foreign Exchange Contracts, USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Foreign Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI for Derivative Instruments	$ (7.3)	[1]

[1] This amount is inclusive of both realized and unrealized gains and losses recognized in OCI.