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Amount of debt and lease obligation, classified as current.

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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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Indicates line item in statement of financial position that includes finance lease liability.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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DEBT - Schedule of Short-Term Debt (Details) € in Millions, $ in Millions	Jun. 30, 2026 USD ($)	Jun. 30, 2026 EUR (€)	Dec. 30, 2025 USD ($)	Dec. 30, 2025 EUR (€)	Oct. 17, 2025 USD ($)	Oct. 17, 2025 EUR (€)	Jun. 30, 2025 USD ($)
Debt Instrument [Line Items]
Short-term debt	$ 12.3						$ 0.0
Long term debt	3,069.7
Finance lease obligations & other long term debt	6.2						9.7
Total debt	3,088.2						4,008.4
Less: Short-term debt and current portion of long-term debt	(14.4)						(3.5)
Total Long-term debt	3,073.8						4,004.9
Less: Unamortized financing fees and discounts on long-term debt	(40.4)						(49.4)
Total Long-term debt, net	$ 3,033.4						$ 3,955.5
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Long-term debt, net	Long-term debt, net					Long-term debt, net
Senior Notes
Debt Instrument [Line Items]
Long term debt			$ 16.9	€ 14.4
Senior Notes \| 2026 Dollar Senior Secured Notes due April 2026
Debt Instrument [Line Items]
Long term debt	$ 0.0						$ 350.0
Senior Notes \| 2026 Euro Senior Secured Notes due April 2026
Debt Instrument [Line Items]
Long term debt	0.0				$ 526.8	€ 450.0	820.0
Senior Notes \| 2027 Euro Senior Secured Notes due May 2027
Debt Instrument [Line Items]
Long term debt	569.8	€ 500.0					585.7
Senior Notes \| 2028 Euro Senior Secured Notes due September 2028
Debt Instrument [Line Items]
Long term debt	0.0		$ 588.9	€ 500.0			585.7
Senior Notes \| 2029 Dollar Senior Secured Notes due January 2029
Debt Instrument [Line Items]
Long term debt	500.0						500.0
Senior Notes \| 2030 Dollar Senior Secured Notes due July 2030
Debt Instrument [Line Items]
Long term debt	750.0						750.0
Senior Notes \| 2031 Dollar Senior Secured Notes due January 2031
Debt Instrument [Line Items]
Long term debt	900.0						0.0
Line of Credit \| Revolving credit facility \| 2023 Coty Revolving Credit Facility due July 2028
Debt Instrument [Line Items]
Long term debt	$ 349.9						$ 407.3