Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease costs	$ 2.4	$ 2.3	$ 4.8	$ 4.7
Short-term operating lease costs	0.1	0.1	0.2	0.2
Cash paid for amounts included in the measurement of operating lease liabilities	0.1	2.4	0.2	4.8
Operating lease liabilities arising from obtaining operating right of-use assets	$ 2.4	$ 0.4	$ 4.9	$ 0.6