Leases - Right of Use Assets and Operating Lease Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Leases [Abstract]
Cash paid for operating lease liabilities	$ 127.5	$ 125.5	$ 129.2
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 100.7	$ 97.4	$ 90.5
Weighted-average remaining lease term (in years)	6 years	5 years
Weighted-average discount rate	3.60%	3.30%
Current operating lease liability	$ 100.8	$ 92.2