Discontinued Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Net sales		$ 18.3
Cost of sales		15.8
Operating expenses		10.7
Gain on Sale		0.6
Income tax benefit	$ 0.0	(1.6)	$ 0.0
Net loss from discontinued operations	$ 0.0	$ (6.0)	$ 0.0