Derivative Instruments Foreign Currency Exchange Rate Risk (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Percentage of company sales denominated in US dollars			99.00%
Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Loss on foreign currency derivatives recorded in earnings, net	$ (1.3)	$ 0.5	$ 0.8	$ 1.7
Foreign Exchange Forward | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Loss on derivative, net	$ 3.1		$ 3.1