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Derivative Financial Instruments - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Sep. 30, 2017	Mar. 31, 2017
Not Designated as Hedging Instrument | Foreign Exchange Forward And Swap
Derivative [Line Items]
Derivative term of contract	1 month
Foreign Exchange Forward | Designated as hedging instruments | Cash Flow Hedges
Derivative [Line Items]
Derivative term of contract	4 months
Notional amount of derivatives	$ 149.1	$ 59.4
Cash flow hedge gain (loss) to be reclassified within twelve months	(2.7)
Foreign Exchange Forward | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount of derivatives	$ 95.6	$ 56.7

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

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X

- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

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- Definition

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.

+ References

No definition available.

+ Details

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X

- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Details

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