EQUITY AND CONVERTIBLE PREFERRED STOCK - Schedule of Key Terms of Series A Preferred Stock (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021	Mar. 27, 2017
Class of Stock [Line Items]
Number of Shares Awarded at Grant Date (millions of shares)	1.0	1.5
Number of Shares Outstanding (millions of shares)	1.0	1.5
Share-based compensation expense	$ 137.6	$ 197.8	$ 28.4
Series A Preferred Stock
Class of Stock [Line Items]
Number of Shares Awarded at Grant Date (millions of shares)	1.0			1.0
Number of Shares Outstanding (millions of shares)	1.0			1.0
Hurdle Price per Share (in dollars per share)				$ 22.39
Selling, general and administrative expenses
Class of Stock [Line Items]
Share-based compensation expense	$ 138.7	202.0	34.7
Selling, general and administrative expenses | Former Board of Directors Chairman
Class of Stock [Line Items]
Share-based compensation expense	$ 0.2	$ (0.2)	$ 0.8