Leases - Right of Use Assets and Operating Lease Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Leases [Abstract]
Cash paid for operating lease liabilities	$ 125.5	$ 129.2	$ 127.6
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 97.4	$ 90.5	$ 127.4
Weighted-average remaining lease term (in years)	5 years	6 years
Weighted-average discount rate	3.30%	2.70%
Current operating lease liability	$ 92.2	$ 95.5