DEBT - Schedule of debt (Details) - USD ($) $ in Millions	Dec. 31, 2024	Jun. 30, 2024
Debt Instrument [Line Items]
Short-term debt	$ 1.5	$ 0.0
Long-term debt	3,449.3
Finance lease obligations & other long term debt	8.2	4.3
Total debt	3,459.0	3,913.7
Less: Short-term debt and current portion of long-term debt	(14.4)	(3.0)
Total Long-term debt	3,444.6	3,910.7
Less: Unamortized financing fees and discounts on long-term debt	(57.6)	(68.9)
Total Long-term debt, net	3,387.0	3,841.8
Senior Secured Notes \| 2026 Dollar Senior Secured Notes due April 2026
Debt Instrument [Line Items]
Long-term debt	350.0	650.0
Senior Secured Notes \| 2026 Euro Senior Secured Notes due April 2026
Debt Instrument [Line Items]
Long-term debt	728.5	748.1
Senior Secured Notes \| 2027 Euro Senior Secured Notes due May 2027
Debt Instrument [Line Items]
Long-term debt	520.4	534.3
Senior Secured Notes \| 2028 Euro Senior Secured Notes due September 2028
Debt Instrument [Line Items]
Long-term debt	520.4	534.3
Senior Secured Notes \| 2029 Dollar Senior Secured Notes due January 2029
Debt Instrument [Line Items]
Long-term debt	500.0	500.0
Senior Secured Notes \| 2030 Dollar Senior Secured Notes due July 2030
Debt Instrument [Line Items]
Long-term debt	750.0	750.0
Line of Credit \| Coty Revolving Credit Facility due July 2028 \| Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	80.0	0.0
Current portion of long-term debt includes swingline loans outstanding	10.0	0.0
Line of Credit \| 2026 Euro Notes due April 2026 \| Term Loan
Debt Instrument [Line Items]
Long-term debt	$ 0.0	$ 192.7

Long-term Debt And Finance Lease Obligations, Gross

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Present value of lessee's discounted obligation for lease payments from finance lease.

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