DEBT - Schedule of Fair Value of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jun. 30, 2019
2018 Coty Credit Agreement | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	$ 6,047.1	$ 6,281.4
2018 Coty Credit Agreement | Fair Value
Debt Instrument [Line Items]
Fair value of debt	5,886.9	6,058.9
Senior Unsecured Notes | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	1,446.6	1,459.1
Senior Unsecured Notes | Fair Value
Debt Instrument [Line Items]
Fair value of debt	$ 1,510.7	$ 1,439.6