Fair Values of Financial Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Fair Value Measurements [Line Items]
Notional value of foreign currency forward-exchange contracts	$ 1,100.0
Foreign currency cash flow hedge contracts, fair value in total asset position	28.8
Foreign Exchange Forward
Fair Value Measurements [Line Items]
Notional value of foreign currency forward-exchange contracts	$ 1,100.0

Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

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