Leases - Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease expense	$ 1.2	$ 1.2	$ 2.5	$ 2.4
Variable lease expense	2.0	0.3	3.7	1.7
Total lease expense	$ 3.2	$ 1.5	$ 6.2	$ 4.1