INCOME TAXES - Narrative (Details) $ in Millions	12 Months Ended
	Jun. 30, 2025 USD ($) jurisdiction	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
Income Tax Contingency [Line Items]
Effective income tax rate	(1.60%)	46.50%	25.80%
Increase from change in deferred tax assets valuation allowance from prior year		19.00%
Change in unrecognized tax benefit	9.90%	7.60%
Change in foreign income permanent differences	12.70%
Change in Brazil tax recovery benefit	22.80%
Change in tax deductible impairment	9.00%
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		10.20%
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	$ (2.4)	$ (37.8)	$ 0.0
Increase (decrease) in tax contingency from prior year		(7.60%)
Tax loss carry forwards subject to expiration	623.1
Valuation allowance	274.1	$ 151.4
Unrecognized tax benefits	240.8	215.3	235.5	$ 251.6
Unrecognized tax benefits that would impact effective tax rate	157.3
Unrecognized tax benefits, including accrued interest and penalties	194.3	200.2
Unrecognized tax benefits, interest	7.1	(2.4)	7.8
Unrecognized tax benefits, penalties	0.0	0.0	$ 0.0
Accrued interest and penalties	$ 36.6	30.2
Number of tax jurisdictions | jurisdiction	40
Income tax benefit	$ 33.4	$ 19.0
Amount of decrease in UTBs	$ 8.2
KKW Holdings
Income Tax Contingency [Line Items]
Increase from change in deferred tax assets valuation allowance from prior year	28.40%	19.00%