EQUITY AND CONVERTIBLE PREFERRED STOCK - Preferred Stock (Details)	12 Months Ended
	Jun. 30, 2024 USD ($) vote $ / shares shares	Jun. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2022 USD ($)	Jun. 30, 2020 $ / shares shares	Aug. 27, 2021 shares	Nov. 16, 2020 shares	Mar. 27, 2017 $ / shares shares
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares) | shares	20,000,000.0	20,000,000.0
Preferred stock, shares issued (in shares) | shares	1,000,000.0
Preferred stock, shares outstanding (in shares) | shares	1,000,000.0
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Total share-based compensation (income) expense	$ 91,800,000	$ 137,600,000	$ 197,800,000
Preferred stock classified as a liability	0	800,000
Dividends, preferred stock	13,200,000	13,200,000
Dividends	0
Employee taxes	100,000	200,000	1,400,000
Selling, general and administrative expenses
Class of Stock [Line Items]
Total share-based compensation (income) expense	91,800,000	138,700,000	202,000,000.0
Additional Paid-in Capital
Class of Stock [Line Items]
Dividends, preferred stock	13,200,000	13,200,000
Noncash dividend	0	100,000	800,000
Former Board of Directors Chairman | Selling, general and administrative expenses
Class of Stock [Line Items]
Total share-based compensation (income) expense	(800,000)	200,000	(200,000)
Restricted Stock Units
Class of Stock [Line Items]
Total share-based compensation (income) expense	78,500,000	131,900,000	197,200,000
Payment of ordinary dividends, common stock, declared during the period	300,000	700,000
Restricted Stock Units and Phantom Units | Accrued Expenses and Other Current Liabilities
Class of Stock [Line Items]
Noncash dividend	800,000	1,000,000.0
Restricted Stock Units and Phantom Units | Other Noncurrent Liabilities
Class of Stock [Line Items]
Noncash dividend	$ 0.0	100,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares) | shares	1,000,000
Preferred stock, shares issued (in shares) | shares	1,000,000						1,000,000
Preferred stock, shares outstanding (in shares) | shares	1,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01
Number of votes entitled to holders | vote	0
Preferred stock, redemption price (in dollars per share) | $ / shares							$ 0.01
Convertible Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.01
Investment agreement, shares to be sold (in shares) | shares				1,000,000
Investment agreement, sale of stock (in dollars per share) | $ / shares				$ 1,000
Preferred stock dividend rate	9.00%
Dividends, preferred stock	$ 13,200,000	13,200,000	35,200,000
Payment of ordinary dividends, preferred stock and preference stock, declared during the period	13,200,000	13,200,000	55,800,000
Converted dividends	0	$ 0	$ 50,100,000
Noncash dividend	$ 3,300,000
Convertible Series B Preferred Stock | KKR | HFS Holdings S.á r.l.
Class of Stock [Line Items]
Preferred stock, shares issued (in shares) | shares					146,057	146,057