LEASES - SUPPLEMENTAL BALANCE SHEET (Details) $ in Millions	Mar. 31, 2020 USD ($) Rate
Operating Leased Assets [Line Items]
Operating Lease, Right-of-Use Asset	$ 855
Operating Lease, Liability, Current	245
Operating Lease, Liability, Noncurrent	645
Operating Lease, Liability	$ 890
Operating Lease, Weighted Average Remaining Lease Term	6 years 4 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent | Rate	4.40%