LEASES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Lessee, Lease, Description [Line Items]
Operating lease, net rent expense		$ 197.7	$ 208.2
Operating lease, sublease income		9.4	6.2
Operating lease, impairment loss	$ 7.8	$ 0.0	$ 0.0
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, lease term	10 years
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, lease term	25 years