Derivative Financial Instruments - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Dec. 31, 2017	Mar. 31, 2017
Derivative [Line Items]
Additional term to recognize derivative loss in Accumulated Other Comprehensive Loss	2 months
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	$ 135.0	$ 59.4
Cash flow hedge gain (loss) to be reclassified within twelve months	(1.2)
Foreign Exchange Forward | Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount of derivatives	$ 89.0	$ 56.7