DEBT - Schedule of Fair Value of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2018	Jun. 30, 2018
2018 Coty Credit Agreement | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	$ 6,594.1	$ 6,130.1
2018 Coty Credit Agreement | Fair Value
Debt Instrument [Line Items]
Fair value of debt	6,478.0	6,070.8
Senior Notes | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	1,481.1	1,482.3
Senior Notes | Fair Value
Debt Instrument [Line Items]
Fair value of debt	$ 1,427.6	$ 1,449.9