INCOME TAXES - Narrative (Details) $ in Millions	12 Months Ended
	Jun. 30, 2021 USD ($) jurisdiction	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Nov. 30, 2020	Jun. 30, 2018 USD ($)
Income Tax Contingency [Line Items]
Tax benefit, foreign tax rate differential	$ 234.4
Tax expense, internal restructuring	130.0
Capital loss carry forwards	1.1	105.7
Tax loss carry forwards subject to expiration	1,343.8
Valuation allowance	33.4	40.0
Unrecognized tax benefits	279.9	277.9	263.6		$ 235.7
Unrecognized tax benefits that would impact effective tax rate	161.7
Unrecognized tax benefits, including accrued interest and penalties	181.2	170.7
Unrecognized tax benefits, interest	0.8	3.2	4.3
Unrecognized tax benefits, penalties	0.5	0.0	$ 0.0
Accrued interest and penalties	$ 21.7	19.3
Number of tax jurisdictions | jurisdiction	50
Income tax benefit	$ 33.7	$ 12.8
Amount of decrease in UTBs	$ 21.7
Discontinued Operations, Disposed of by Sale | Wella Business
Income Tax Contingency [Line Items]
Ownership percentage after transaction				40.00%