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Derivative Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivative [Line Items]
Estimate of time to transfer gain (loss) from other comprehensive income (loss)	12 months
Designated as hedging instruments: | Foreign Exchange Forward And Swap
Derivative [Line Items]
Derivative term of contract	1 month
Designated as hedging instruments: | Foreign Exchange Forward | Cash flow hedges
Derivative [Line Items]
Derivative term of contract	4 months
Derivative notional amount		$ 59.4
Not Designated as Hedging Instrument | Foreign Exchange Forward
Derivative [Line Items]
Derivative notional amount	$ 47.2	$ 56.7
Deferred Hedging Gains (Losses)
Derivative [Line Items]
Net losses to be reclassified into earnings in the next 12 months	$ 3.2

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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- Definition

Estimated period for the anticipated transfer of gain (loss), net, from accumulated other comprehensive income into earnings, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.

+ References

No definition available.

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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.

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- 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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