SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Significant Accounting Policies [Line Items]
Restricted cash	$ 30.5	$ 56.9
Sales returns, percentage	2.00%	2.00%	3.00%
Trade spending activities, percentage	10.00%	10.00%	11.00%
Advertising expense	$ 1,465.1	$ 1,029.4	$ 1,343.7
Research and development expense	97.3	96.5	93.4
Net (losses) gains from foreign currency exchange transactions	16.8	(26.7)	(30.5)
Net deferred income tax (liability) asset		83.6
Selling, general and administrative expenses	2,881.3	2,363.2	3,120.0
Asset impairment charges	31.4	0.0	434.0
Russia Market Exit
Significant Accounting Policies [Line Items]
Net deferred income tax (liability) asset	83.6
Selling, general and administrative expenses	45.5
Asset impairment charges	31.4
Restructuring costs	6.3
Inventory write-down	0.4
Income tax charges	24.1
Additional costs	10.0
Operating Income (Loss)
Significant Accounting Policies [Line Items]
Net (losses) gains from foreign currency exchange transactions	3.3	(7.8)	(18.0)
Interest Expense, Net and Other Expense (Income), Net
Significant Accounting Policies [Line Items]
Net (losses) gains from foreign currency exchange transactions	$ 10.0	(6.8)	(14.8)
Store fixtures \| Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	3 years
Store fixtures \| Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	5 years
Marketing furniture and fixtures
Significant Accounting Policies [Line Items]
Depreciation and amortization	$ 119.4	$ 130.3	$ 127.9
Marketing furniture and fixtures \| Minimum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	3 years
Marketing furniture and fixtures \| Maximum
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful life	5 years

Revenue Recognition, Reduction of Gross Revenue from Trade Spending Activities, Percentage

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Revenue Recognition, Sales returns as a percentage of gross revenues, percent

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[Line Items] for Significant Accounting Policies [Table]

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of expected cost remaining for the specified restructuring cost.

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Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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