Derivative Instruments - Narrative (Details)	3 Months Ended
Mar. 31, 2017
Derivatives not designated as hedges: \| Foreign currency option and forward contracts
Derivative [Line Items]
Derivative, term of contract	24 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.

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