Leases - Right of Use Assets and Operating Lease Liabilities (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Leases [Abstract]
Cash paid for operating lease liabilities	$ 64.5	$ 77.0
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 61.1	$ 72.0
Weighted-average remaining lease term (in years)	6 years		6 years
Weighted-average discount rate	2.10%		2.20%
Current operating lease liability	$ 99.6		$ 94.7