DERIVATIVE INSTRUMENTS - Gains and Losses Recognized in OCI (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Derivative [Line Items]
Gain (Loss) Recognized in OCI	$ (173.1)	$ 157.3
Foreign exchange forward contracts
Derivative [Line Items]
Gain (Loss) Recognized in OCI	(1.2)	0.4
Interest rate swap contracts
Derivative [Line Items]
Gain (Loss) Recognized in OCI	0.2	(0.5)
Cross-currency swap contracts
Derivative [Line Items]
Gain (Loss) Recognized in OCI	$ (25.1)	$ 3.9