Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2020	Mar. 31, 2020
Leases [Abstract]
Operating lease costs	$ 2.4	$ 7.1
Cash paid for amounts included in the measurement of operating lease liabilities	2.4	7.1
Operating lease liabilities arising from obtaining operating right of-use assets	$ 0.7	$ 4.4