Other Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Other Income and Expenses [Abstract]
Unrealized gains on company-owned life insurance contracts and investments held in rabbi trusts	$ 1.4	$ 0.1
Foreign exchange (loss) gain	(2.7)	0.2
Pension earnings, interest and deferrals	(1.0)	(0.7)
Other	0.0	0.1
Total other expense, net	$ (2.3)	$ (0.3)