DEBT - Schedule of fair value of debt (Details) - USD ($) $ in Millions	Mar. 31, 2025	Jun. 30, 2024
2018 Coty Credit Agreement | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	$ 401.7	$ 0.0
2018 Coty Credit Agreement | Fair Value
Debt Instrument [Line Items]
Fair value of debt	401.7	0.0
Senior Secured Notes | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	3,441.5	3,716.7
Senior Secured Notes | Fair Value
Debt Instrument [Line Items]
Fair value of debt	3,472.9	3,719.7
Senior Unsecured Notes | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	0.0	192.7
Senior Unsecured Notes | Fair Value
Debt Instrument [Line Items]
Fair value of debt	$ 0.0	$ 192.8