DEBT - Schedule of fair value of debt (Details) - USD ($) $ in Millions	Dec. 31, 2024	Jun. 30, 2024
2018 Coty Credit Agreement | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	$ 80.0	$ 0.0
2018 Coty Credit Agreement | Fair Value
Debt Instrument [Line Items]
Fair value of debt	80.0	0.0
Senior Secured Notes | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	3,369.3	3,716.7
Senior Secured Notes | Fair Value
Debt Instrument [Line Items]
Fair value of debt	3,396.1	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