LEASES - FUTURE MATURITIES (Details) - USD ($) $ in Millions	Mar. 31, 2020	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months	$ 245
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two	193
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three	159
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four	134
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five	93
Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five	199
Lessee, Operating Lease, Liability, Payments, Due	1,023
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(133)
Operating Lease, Liability	$ 890
Operating Leases, Future Minimum Payments Due, Next Twelve Months		$ 263
Operating Leases, Future Minimum Payments, Due in Two Years		209
Operating Leases, Future Minimum Payments, Due in Three Years		165
Operating Leases, Future Minimum Payments, Due in Four Years		141
Operating Leases, Future Minimum Payments, Due in Five Years		121
Operating Leases, Future Minimum Payments, Due Thereafter		244
Operating Leases, Future Minimum Payments Due		$ 1,143