LEASES - Schedule of lease cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Lease Cost:
Operating lease cost	$ 19.4	$ 18.7	$ 38.2	$ 37.8
Short-term lease cost	0.7	0.5	1.4	0.8
Variable lease cost	10.7	8.9	22.4	19.6
Sublease income	(3.8)	(4.5)	(7.4)	(8.4)
Net lease cost	27.0	23.6	54.6	49.8
Other information:
Operating cash outflows from operating leases	(18.1)	(18.0)	(34.9)	(37.2)
Right-of-use assets obtained in exchange for lease obligations	$ 0.5	$ 17.7	$ 19.1	$ 32.7
Weighted-average remaining lease term - real estate	6 years 6 months	6 years 10 months 24 days	6 years 6 months	6 years 10 months 24 days
Weighted-average discount rate - real estate leases	4.54%	4.42%	4.54%	4.42%