DEBT - Schedule of Fair Value of Debt (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jun. 30, 2018
2018 Coty Credit Agreement | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	$ 6,313.9	$ 6,130.1
2018 Coty Credit Agreement | Fair Value
Debt Instrument [Line Items]
Fair value of debt	6,090.2	6,070.8
Senior Unsecured Notes | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	1,448.6	1,482.3
Senior Unsecured Notes | Fair Value
Debt Instrument [Line Items]
Fair value of debt	$ 1,437.0	$ 1,449.9