SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) € in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2024 EUR (€)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 EUR (€)	Jun. 30, 2022 USD ($)
Significant Accounting Policies [Line Items]
Restricted cash	$ 19.8		$ 36.9
Sales returns, percentage	1.00%	1.00%	2.00%	2.00%	2.00%
Trade spending activities, percentage	9.00%	9.00%	10.00%	10.00%	10.00%
Advertising expense	$ 1,625.5		$ 1,479.6		$ 1,465.1
Research and development expense	126.8		105.2		97.3
Net (losses) gains from foreign currency exchange transactions	(14.8)		(29.9)		16.8
Selling, general and administrative expenses	3,162.4		2,818.3		2,881.3
Asset impairment charges	0.0		$ 0.0		31.4
Restructuring, Incurred Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]			Restructuring costs	Restructuring costs
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			0.4		24.1
Net deferred income tax (liability) asset			17.0
Lacoste
Significant Accounting Policies [Line Items]
Termination payment received	16.2	€ 15.0	93.9	€ 87.8
Gain on selling, general and administrative expenses from contract termination			104.4
Contract termination payment	4.9
Disposal of remaining inventory	0.6
Operating Income (Loss)
Significant Accounting Policies [Line Items]
Net (losses) gains from foreign currency exchange transactions	(18.1)		(32.3)		3.3
Interest Expense, Net and Other Expense (Income), Net
Significant Accounting Policies [Line Items]
Net (losses) gains from foreign currency exchange transactions	$ (16.5)		(12.2)		10.0
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	$ 113.6		$ 103.0		$ 119.4
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