Financial Instruments - Narrative (Details) - Not Designated as Hedging Instrument - Foreign currency forward contracts	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Minimum
Derivative [Line Items]
Derivative contract term (months)	1 month	1 month
Maximum
Derivative [Line Items]
Derivative contract term (months)	3 months	3 months

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration