LEASES - Lease cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Lease Cost:
Operating lease cost	$ 19.3	$ 21.2	$ 38.5	$ 42.1
Short-term lease cost	0.3	0.3	0.5	0.6
Variable lease cost	8.2	10.0	16.8	18.9
Sublease income	(3.9)	(5.4)	(7.7)	(10.7)
Net lease cost	23.9	26.1	48.1	50.9
Other information:
Operating cash outflows from operating leases	(18.7)	(22.8)	(40.4)	(45.3)
Right-of-use assets obtained in exchange for lease obligations	$ 6.2	$ 18.6	$ 13.8	$ 27.0
Weighted-average remaining lease term - real estate	7 years 4 months 24 days	6 years 3 months 18 days	7 years 4 months 24 days	6 years 3 months 18 days
Weighted-average discount rate - real estate leases	4.07%	3.49%	4.07%	3.49%