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

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- Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition 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. + References No definition available. + Details
Name: | us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant