SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2023
Significant Accounting Policies [Line Items]
Restricted cash	$ 33.5		$ 33.5		$ 36.9
Effective income tax rate, percentage	27.70%	13.80%	36.40%	22.40%
Change in enacted tax rate, amount			$ 24.3	$ 24.3
Gross unrecognized tax benefits	$ 229.7		229.7		235.5
Unrecognized tax benefits that would impact effective tax rate	180.0		180.0
Unrecognized tax benefits, net	215.6		215.6		218.6
Interest and penalties expense	0.7	$ 0.1	2.0	1.4
Gross accrued interest and penalties	35.1		35.1		$ 33.1
Reasonably possible decrease in UTBs (up to)	26.5		26.5
Russia Market Exit
Significant Accounting Policies [Line Items]
Pre-tax gains (losses) on restructuring	$ (0.0)	$ 16.8	$ (0.1)	$ 15.7