Other Income and Expense (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Income and Expense [Abstract]
Equity in earnings (losses) of non-consolidated affiliate		$ 0.2	$ (0.1)	$ 0.4	$ (0.1)
Interest income		0.1	0.1	0.3	0.2
Foreign currency transactions	[1]	(0.1)	(0.3)	(0.9)	(0.5)
Net periodic benefit cost	[2]	(0.7)	(0.8)	(1.4)	(1.6)
Total other expense - net		$ (0.5)	$ (1.1)	$ (1.6)	$ (2.0)

[1] Foreign currency transactions primarily consist of foreign currency transaction gains and losses on the re-measurement or settlement of foreign currency-denominated assets and liabilities, including intercompany loans and transactions denominated in a foreign currency, along with gains and losses on foreign currency exchange contracts.

[2] Represents net periodic benefit cost, exclusive of service cost, for the Company's pension and postretirement plans.