Leases - Right of Use Assets and Operating Lease Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Leases [Abstract]
Cash paid for operating lease liabilities	$ 129.2	$ 127.6	$ 142.2
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 90.5	$ 127.4	$ 120.2
Weighted-average remaining lease term (in years)	6 years	6 years
Weighted-average discount rate	2.70%	2.20%
Current operating lease liability	$ 95.5	$ 95.1