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RELATED PARTY TRANSACTIONS (Details)		7 Months Ended	12 Months Ended
RELATED PARTY TRANSACTIONS (Details)	Nov. 30, 2020	Jun. 30, 2021 USD ($) shares	Jun. 30, 2021 USD ($) shares	Jun. 30, 2020 USD ($) director shares	Jun. 30, 2019 USD ($)	Nov. 16, 2020 shares
Related Party Transaction [Line Items]
Preferred stock, shares issued (shares) \| shares		1,500,000	1,500,000	1,500,000
Total share-based compensation expense			$ 28,400,000	$ 42,200,000	$ 11,700,000
Sublease income			14,900,000	$ 4,800,000
Chief Executive Officer
Related Party Transaction [Line Items]
Total share-based compensation expense			$ 18,300,000
JAB Partners LLP
Related Party Transaction [Line Items]
Lessee, operating lease, remaining lease term		10 years	10 years
JAB Partners LLP \| Performance Guarantee
Related Party Transaction [Line Items]
Maximum potential future payments		$ 5,700,000	$ 5,700,000
Cottage Holdco B.V. \| Chief Executive Officer
Related Party Transaction [Line Items]
Portion of equity award to be contributed by related party			0.5
KKR
Related Party Transaction [Line Items]
Number of directors designated by related party \| director				2
KKR \| Issuance and Closing of Convertible Preferred Stock
Related Party Transaction [Line Items]
Expenses			$ 7,600,000	$ 25,500,000
KKR \| Consulting and Advisory Services
Related Party Transaction [Line Items]
Expenses			0	0
Affiliates Of JAB Partners LLP \| Digital Media Services
Related Party Transaction [Line Items]
Expenses				1,000,000.0	1,000,000.0
Russell Reynolds Associates \| Recruiting Services
Related Party Transaction [Line Items]
Expenses			2,300,000	600,000	$ 100,000
Jacobs Douwe Egberts B.V. \| Expense Reimbursement Secondment Agreement
Related Party Transaction [Line Items]
Expenses				$ 600,000
Wella Business
Related Party Transaction [Line Items]
Transition Services Agreement, term of agreement	18 months
Transition Services Agreement, extension term	3 months
Accounts receivable, related party		153,400,000	153,400,000
Accounts payable, related party		37,900,000	37,900,000
Total share-based compensation expense			$ 2,300,000
Sublease income		9,100,000
Wella Business \| Transition Services Agreement Fees
Related Party Transaction [Line Items]
Revenue from related party		86,600,000
Wella Business \| Related Party Transaction, Other Fees
Related Party Transaction [Line Items]
Revenue from related party		$ 3,400,000
KKR
Related Party Transaction [Line Items]
Ownership percentage assuming full conversion of preferred stock		18.40%	18.40%
HFS Holdings S.á r.l. \| KKR \| Convertible Series B Preferred Stock
Related Party Transaction [Line Items]
Preferred stock, shares issued (shares) \| shares						146,057