DERIVATIVE INSTRUMENTS - Gains and Losses Recognized in OCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Net investment hedges	$ 2.2	$ (174.4)	$ 18.9	$ (347.5)
Foreign exchange forward contracts
Derivative [Line Items]
Gain (Loss) Recognized in OCI	0.0	0.8	1.7	(0.4)
Interest rate swap contracts
Derivative [Line Items]
Gain (Loss) Recognized in OCI	2.5	0.2	1.9	0.4
Cross-currency swap contracts
Derivative [Line Items]
Gain (Loss) Recognized in OCI	$ 0.0	$ 0.0	$ 0.0	$ (25.1)