Leases - Right of Use Assets and Operating Lease Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Leases [Abstract]
Cash paid for operating lease liabilities	$ 157.5	$ 127.5	$ 125.5
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 133.9	$ 100.7	$ 97.4
Weighted-average remaining lease term (in years)	6 years	6 years
Weighted-average discount rate	3.90%	3.60%
Current operating lease liability	$ 103.6	$ 100.8