LEASES - Lease cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Lease Cost:
Operating lease cost	$ 22.1	$ 21.4	$ 64.2	$ 60.4
Short-term lease cost	0.4	0.1	1.0	0.5
Variable lease cost	9.9	8.3	28.8	38.6
Sublease income	(5.1)	(5.6)	(15.8)	(10.1)
Net lease cost	27.3	24.2	78.2	89.4
Other information:
Operating cash outflows from operating leases	(18.7)	(29.2)	(64.0)	(109.1)
Right-of-use assets obtained in exchange for lease obligations	$ 73.1	$ 16.6	$ 100.1	$ 27.4
Weighted-average remaining lease term - real estate	7 years 9 months 18 days	6 years 6 months	7 years 9 months 18 days	6 years 6 months
Weighted-average discount rate - real estate leases	3.81%	3.55%	3.81%	3.55%