DEBT - Schedule of fair value of debt (Details) - USD ($) $ in Millions	Sep. 30, 2025	Jun. 30, 2025
2018 Coty Credit Agreement | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	$ 468.9	$ 407.3
2018 Coty Credit Agreement | Fair Value
Debt Instrument [Line Items]
Fair value of debt	468.9	407.3
Senior Secured Notes | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	3,592.3	3,591.4
Senior Secured Notes | Fair Value
Debt Instrument [Line Items]
Fair value of debt	$ 3,630.5	$ 3,632.7