Leases - Right of Use Assets and Operating Lease Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021
Leases [Abstract]
Cash paid for operating lease liabilities	$ 33.1	$ 45.3
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 19.5	$ 23.2
Weighted-average remaining lease term (in years)	6 years		6 years
Weighted-average discount rate	2.10%		2.20%
Current operating lease liability	$ 100.3		$ 94.7