EQUITY AND CONVERTIBLE PREFERRED STOCK - Common Stock (Details) $ / shares in Units, $ in Millions				12 Months Ended
	Oct. 02, 2023 USD ($) $ / shares shares	Sep. 18, 2023 shares	Oct. 29, 2021 shares	Jun. 30, 2025 USD ($) vote $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($) shares	Oct. 02, 2023 € / shares
Class of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.01			$ 0.01	$ 0.01
Common stock, shares authorized (in shares)				1,250,000,000	1,250,000,000
Common stock, shares outstanding (in shares)				872,300,000	867,800,000
Exercise of employee stock options and restricted stock units and issuance of restricted stock | $					$ 13.5	$ 0.9
Issuance of Class A Common Stock in connection with global offering, net of offering costs (in shares)	33,000,000
Shares issued (in dollars per share and euro per share) | (per share)	$ 10.80						€ 10.28
Deferred offering costs | $	$ 348.4
Underwriting fees | $	10.0
Professional fees | $	$ 6.0
Employee Stock Options, Restricted Stock Units (RSUs) and Employee Stock Ownership Program
Class of Stock [Line Items]
Exercise of employee stock options and restricted stock units and issuance of restricted stock | $				$ 0.0	$ 13.5	$ 0.9
Restricted Stock Units | JAB Beauty B.V. | Chief Executive Officer
Class of Stock [Line Items]
Shares contributed by related party (in shares)		5,000,000	10,000,000
Common Class A
Class of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares				$ 0.01
Voting rights per share | vote				1
Common stock, shares authorized (in shares)				1,250,000,000
Common stock, shares outstanding (in shares)				872,300,000
Shares issued (in shares)				4,400,000	9,800,000	13,800,000
Common Class A | JAB Beauty B.V.
Class of Stock [Line Items]
Parent ownership percentage				54.00%
Common Class A | Majority Shareholders | JAB Cosmetics B.V.
Class of Stock [Line Items]
Open market shares acquired by related party (in shares)				0.0	3,000,000.0	0.0