Leases - Right of Use Assets and Operating Lease Liabilities (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024
Leases [Abstract]
Cash paid for operating lease liabilities	$ 59.3	$ 63.6
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 31.7	$ 45.8
Weighted-average remaining lease term (in years)	5 years		5 years
Weighted-average discount rate	3.40%		3.30%
Current operating lease liability	$ 94.6		$ 92.2