Other Expense, Net - Schedule of Other Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Other Income and Expenses [Abstract]
Interest income	$ (0.2)	$ (0.1)
Foreign exchange losses	0.3	0.1
Unrealized losses on company-owned life insurance contracts and investments held in rabbi trusts	0.4	1.0
Pension earnings, interest and deferrals	3.5	2.5
Total other expense, net	$ 4.0	$ 3.5