DERIVATIVE INSTRUMENTS - Gains and Losses Recognized in OCI (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Derivative [Line Items]
Net investment hedges	$ 16.7	$ (173.1)
Foreign exchange forward contracts
Derivative [Line Items]
Gain (Loss) Recognized in OCI	1.7	(1.2)
Interest rate swap contracts
Derivative [Line Items]
Gain (Loss) Recognized in OCI	(0.6)	0.2
Cross-currency swap contracts
Derivative [Line Items]
Gain (Loss) Recognized in OCI	$ 0.0	$ (25.1)