INCOME TAXES - Narrative (Details) $ in Millions	12 Months Ended
	Jun. 30, 2020 USD ($) jurisdiction	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)
Income Tax Disclosure [Abstract]
Capital loss carry forwards	$ 105.7	$ 0.0
Tax Cuts and Jobs Act, income tax expense			$ 123.0
Tax loss carry forwards subject to expiration	2,075.5
Valuation allowance	40.0	59.2
Unrecognized tax benefits	277.9	263.6	235.7	$ 256.7
Unrecognized tax benefits that would impact effective tax rate	150.1
Unrecognized tax benefits, including accrued interest and penalties	170.7	170.6
Unrecognized tax benefits, interest	3.2	4.3	1.5
Unrecognized tax benefits, penalties	0.0	0.0	$ 0.4
Accrued interest and penalties	$ 19.3	16.7
Number of tax jurisdictions | jurisdiction	55
Income tax benefit	$ 12.8	$ 11.7
Amount of decrease in UTBs	33.2
Foreign earnings repatriated	$ 4,600.0