Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Operating lease expense	$ 1.2	$ 1.3	$ 3.6	$ 3.1
Variable lease expense	1.1	1.2	2.8	2.5
Total lease expense	$ 2.3	$ 2.5	$ 6.4	$ 5.6