Other (Expense) Income, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Other Income and Expenses [Abstract]
Unrealized gains on company-owned life insurance contracts and investments held in rabbi trusts	$ 0.1	$ 1.0
Foreign exchange gain	0.2	0.5
Interest income	0.0	0.1
Pension earnings, interest and deferrals	(0.7)	0.0
Other	0.1	0.0
Total other (expense) income, net	$ (0.3)	$ 1.6