INCOME TAXES - Narrative (Details) $ in Millions	12 Months Ended
	Jun. 30, 2024 USD ($) jurisdiction	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Income Tax Contingency [Line Items]
Increase (decrease) in effective income tax rate from prior year	20.70%	(12.80%)
Increase from change in deferred tax assets valuation allowance from prior year	17.60%
Increase in principal relocation from prior year	13.50%
Increase in tax rate change deferred tax liability revaluation from prior year	11.80%
Increase in foreign income tax rate differentia from prior year	11.70%
Decrease in Swiss tax credits-net of valuation allowance from prior year	18.50%
Swiss tax credit	$ 97.1
Swiss tax credits, expense (benefit), net of valuation allowance	$ (37.8)	$ 0.0	$ 0.0
Increase (decrease) in tax contingency from prior year	(12.20%)
Decrease from Russia market exit from prior year		6.60%
Decrease in other nondeductible expense from prior year		6.60%
Decrease in non-deductible executive stock compensation from prior year		4.80%
Decrease in disposition of asset from prior year		3.00%
Decrease in currency loss from prior year		1.90%
Tax loss carry forwards subject to expiration	$ 482.7
Valuation allowance	151.4	$ 60.7
Unrecognized tax benefits	215.3	235.5	251.6	$ 279.9
Unrecognized tax benefits that would impact effective tax rate	169.9
Unrecognized tax benefits, including accrued interest and penalties	200.2	218.6
Unrecognized tax benefits, interest	(2.4)	7.8	4.2
Unrecognized tax benefits, penalties	0.0	0.0	$ 0.0
Accrued interest and penalties	$ 30.2	33.1
Number of tax jurisdictions | jurisdiction	40
Income tax benefit	$ 19.0	$ 18.4
Amount of decrease in UTBs	$ 32.9
Wella Business
Income Tax Contingency [Line Items]
Increase in foreign income tax rate differentia from prior year		2.40%
Increase (decrease) in tax contingency from prior year		7.10%