Leases - Right of Use Assets and Operating Lease Liabilities (Details) - USD ($) $ in Millions	9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023
Leases [Abstract]
Cash paid for operating lease liabilities	$ 95.6	$ 95.8
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 54.2	$ 43.6
Weighted-average remaining lease term (in years)	5 years		6 years
Weighted-average discount rate	3.00%		2.70%
Current operating lease liability	$ 94.3		$ 95.5