Fair Value of Financial Assets on Recurring Basis (Detail) (Level 2 [Member], Foreign Exchange Forward Contracts [Member], Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Level 2 [Member] | Foreign Exchange Forward Contracts [Member] | Fair Value, Measurements, Recurring [Member]
Financial Assets:
Foreign exchange forward contracts	$ 1	$ 0