DERIVATIVE INSTRUMENTS - Amount of Gains and Losses Related Derivative Financial Instruments Not Designated as Hedging Instruments (Details) - Foreign exchange forward contracts - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Selling, general and administrative expenses
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss)	$ 0.1	$ (0.8)	$ 0.0
Interest income (expense), net
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss)	26.3	(3.1)	0.1
Other income (expense), net
Derivative Instruments, Gain (Loss) [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss)	$ (0.6)	$ 0.4	$ 0.0