Other Income and Expense (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income and Expense [Abstract]
Interest income		$ 0.1	$ 0.0	$ 0.1	$ 0.3
Foreign currency transactions	[1]	(0.5)	0.2	(0.1)	0.7
Net periodic benefit cost	[2]	(0.3)	(0.7)	(0.5)	(1.5)
Total other expense - net		$ (0.7)	$ (0.5)	$ (0.5)	$ (0.5)

[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 certain foreign currency exchange contracts.

[2] Net periodic benefit cost for the Company’s pension and postretirement plans is exclusive of service cost.