Fair Value - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Recurring [Member], Forward contracts [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2013
Assets Derivatives:
Derivative Financial Instruments, Assets	$ 2
Liabilities Derivatives:
Derivative Financial Instruments, Liabilities	2
Level 1 [Member]
Assets Derivatives:
Derivative Financial Instruments, Assets
Liabilities Derivatives:
Derivative Financial Instruments, Liabilities
Level 2 [Member]
Assets Derivatives:
Derivative Financial Instruments, Assets	2
Liabilities Derivatives:
Derivative Financial Instruments, Liabilities	2
Level 3 [Member]
Assets Derivatives:
Derivative Financial Instruments, Assets
Liabilities Derivatives:
Derivative Financial Instruments, Liabilities