DEBT - Schedule of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2018	Jun. 30, 2018
Debt Instrument [Line Items]
Short-term debt	$ 7.9	$ 9.2
Long-term Debt	8,075.2
Other long-term debt and capital lease obligations	1.5	1.6
Total debt	8,084.6	7,623.2
Less: Short-term debt and current portion of long-term debt	(200.7)	(218.9)
Total Long-term debt	7,883.9	7,404.3
Less: Unamortized deferred financing costs	(81.9)	(86.2)
Less: Discount on Long-term debt	(12.3)	(12.7)
Total Long-term debt, net	7,789.7	7,305.4
Debt issuance costs, net	81.9	86.2
Line of Credit \| 2018 Coty Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Less: Unamortized deferred financing costs	(29.7)	(31.4)
Debt issuance costs, net	29.7	31.4
Line of Credit \| 2018 Coty Revolving Credit Facility Due April 2023 \| Revolving Credit Facility
Debt Instrument [Line Items]
Long-term Debt	884.5	368.1
Line of Credit \| 2018 Coty Term A Facility Due April 2023 \| Term Loan
Debt Instrument [Line Items]
Long-term Debt	3,326.3	3,371.5
Less: Unamortized deferred financing costs	(27.6)	(29.2)
Debt issuance costs, net	27.6	29.2
Line of Credit \| 2018 Coty Term B Facility Due April 2025 \| Term Loan
Debt Instrument [Line Items]
Long-term Debt	2,383.3	2,390.5
Less: Unamortized deferred financing costs	(10.5)	(10.9)
Debt issuance costs, net	10.5	10.9
Line of Credit \| 2026 Dollar And Euro Notes \| Term Loan
Debt Instrument [Line Items]
Less: Unamortized deferred financing costs	(8.0)	(8.3)
Debt issuance costs, net	8.0	8.3
Line of Credit \| 2026 Dollar Notes Due April 2026 \| Revolving Credit Facility
Debt Instrument [Line Items]
Long-term Debt	550.0	550.0
Line of Credit \| 2023 Euro Notes Due April 2023 \| Term Loan
Debt Instrument [Line Items]
Long-term Debt	640.1	640.9
Less: Unamortized deferred financing costs	(6.1)	(6.4)
Debt issuance costs, net	6.1	6.4
Line of Credit \| 2026 Euro Notes Due April 2026 \| Term Loan
Debt Instrument [Line Items]
Long-term Debt	$ 291.0	$ 291.4

Long-term Debt and Capital Lease Obligations, Gross

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Other Long-Term Debt And Capital Lease Obligations

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt discount.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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