Leases - Right of Use Assets and Operating Lease Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Cash paid for operating lease liabilities	$ 142.2	$ 224.7
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 120.2	$ 160.4
Weighted-average remaining lease term (in years)	6 years	6 years
Weighted-average discount rate	2.20%	2.30%
Current operating lease liability	$ 94.7	$ 95.5