Derivative Financial Instruments - Additional Information (Detail) (Forward Contracts [Member], Maximum [Member], USD $) In Millions, unless otherwise specified	Sep. 30, 2014
Forward Contracts [Member] \| Maximum [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign currency forward contracts	$ 1

Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps.

No definition available.

Name:	us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant