Leases - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Operating lease costs	$ 9.1	$ 9.5
Short-term operating lease costs	0.2	0.5
Cash paid for amounts included in the measurement of operating lease liabilities	9.7	9.5
Operating lease liabilities arising from obtaining operating right of-use assets	$ 1.1	$ 5.2
Weighted average remaining lease term	3 years 1 month 2 days
Weighted average discount rate	5.39%