DEBT - Schedule of Fair Value of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2020	Jun. 30, 2020
2018 Coty Credit Agreement | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	$ 6,909.5	$ 6,706.3
2018 Coty Credit Agreement | Fair Value
Debt Instrument [Line Items]
Fair value of debt	6,334.3	5,962.3
Senior Unsecured Notes | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	1,488.5	1,449.4
Senior Unsecured Notes | Fair Value
Debt Instrument [Line Items]
Fair value of debt	$ 1,206.6	$ 1,270.3