LEASES - Lease cost (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Lease Cost:
Operating lease cost	$ 19.1	$ 19.2
Short-term lease cost	0.3	0.2
Variable lease cost	10.8	8.6
Sublease income	(3.9)	(3.8)
Net lease cost	26.3	24.2
Other information:
Operating cash outflows from operating leases	(19.2)	(21.7)
Right-of-use assets obtained in exchange for lease obligations	$ 15.0	$ 7.6
Weighted-average remaining lease term - real estate	7 years	7 years 7 months 6 days
Weighted-average discount rate - real estate leases	4.29%	4.02%