Leases - Right of Use Assets and Operating Lease Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Leases [Abstract]
Cash paid for operating lease liabilities	$ 45.3	$ 40.2
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 23.2	$ 6.7
Weighted-average remaining lease term (in years)	6 years		6 years
Weighted-average discount rate	2.30%		2.30%