Leases - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease cost	$ 36.7	$ 40.0	$ 72.5	$ 79.1
Short-term lease cost	0.2	0.3	0.5	0.7
Variable lease cost	2.9	2.2	5.4	4.3
Total operating lease cost	$ 39.8	$ 42.5	$ 78.4	$ 84.1