Other Income and Expense (Details) - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Other Income and Expense [Abstract]
Equity in earnings of non-consolidated affiliate		$ 0.2	$ 0.1	$ 0.1
Interest income		0.4	0.4	0.4
Foreign currency transactions	[1]	(0.6)	(1.9)	(1.3)
Net periodic benefit cost	[2]	(3.3)	(2.9)	(44.6)
Gain from insurance recovery	[3]	0.0	0.0	9.5
Total other expense - net		$ (3.3)	$ (4.3)	$ (35.9)

[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.

[3] During fiscal 2016, the Company settled an insurance claim related to machinery and equipment destroyed in a fire at its Airedale facility and recorded a gain of $9.5 million. See Note 1 for additional information.