LEASES - Lease cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Lease Cost:
Operating lease cost	$ 19.0	$ 22.1	$ 57.5	$ 64.2
Short-term lease cost	0.1	0.4	0.6	1.0
Variable lease cost	10.8	9.9	27.6	28.8
Sublease income	(4.3)	(5.1)	(12.0)	(15.8)
Net lease cost	25.6	27.3	73.7	78.2
Other information:
Operating cash outflows from operating leases	(16.8)	(18.7)	(57.2)	(64.0)
Right-of-use assets obtained in exchange for lease obligations	$ 0.4	$ 73.1	$ 14.2	$ 100.1
Weighted-average remaining lease term - real estate	7 years 4 months 24 days	7 years 9 months 18 days	7 years 4 months 24 days	7 years 9 months 18 days
Weighted-average discount rate - real estate leases	4.09%	3.81%	4.09%	3.81%