DEBT - Schedule of Fair Value of Debt (Details) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017
Carrying Amount | 2018 Coty Credit Agreement
Debt Instrument [Line Items]
Fair value of debt	$ 6,130.1	$ 0.0
Carrying Amount | Galleria Credit Agreement
Debt Instrument [Line Items]
Fair value of debt	0.0	1,944.3
Carrying Amount | 2015 Coty Credit Agreement
Debt Instrument [Line Items]
Fair value of debt	0.0	5,265.9
Fair Value | 2018 Coty Credit Agreement
Debt Instrument [Line Items]
Fair value of debt	6,070.8	0.0
Fair Value | Galleria Credit Agreement
Debt Instrument [Line Items]
Fair value of debt	0.0	1,944.0
Fair Value | 2015 Coty Credit Agreement
Debt Instrument [Line Items]
Fair value of debt	0.0	5,275.4
Senior Notes | Carrying Amount
Debt Instrument [Line Items]
Fair value of debt	1,482.3	0.0
Senior Notes | Fair Value
Debt Instrument [Line Items]
Fair value of debt	$ 1,449.9	$ 0.0