Leases - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Operating lease cost	$ 27.3	$ 32.2	$ 54.8	$ 66.2
Short-term lease cost	0.2	0.4	0.5	0.9
Variable lease cost	4.6	4.8	11.2	8.0
Total operating lease cost	$ 32.1	$ 37.4	$ 66.5	$ 75.1