SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - Valuation Allowance for Deferred Tax Assets [Member] - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 49.6	$ 50.8	$ 48.0
Additions Charged (Benefit) to Costs and Expenses		(6.7)	(0.3)	1.5
Additions Charged to Other Accounts	[1]	6.0	(0.9)	1.3
Balance at End of Period		$ 48.9	$ 49.6	$ 50.8

[1] Foreign currency translation, increases due to the acquisition of Luvata HTS and other adjustments