LEASES - SUPPLEMENTAL BALANCE SHEET (Details) - USD ($) $ in Millions	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	6 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	4.30%
Other Noncurrent Assets
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 850
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	850
Other Current Liabilities
Leases [Abstract]
Operating Lease, Liability, Current	239
Lessee, Lease, Description [Line Items]
Operating Lease, Liability, Current	239
Other Noncurrent Liabilities
Leases [Abstract]
Operating Lease, Liability, Noncurrent	652	$ 0
Lessee, Lease, Description [Line Items]
Operating Lease, Liability, Noncurrent	652	$ 0
Other Liabilities
Leases [Abstract]
Operating Lease, Liability	891
Lessee, Lease, Description [Line Items]
Operating Lease, Liability	$ 891