LEASES Schedule of Maturities of Operating and Finance Lease Liabilities (Details) $ in Millions	Mar. 31, 2019 USD ($)
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 111
Finance Lease, Liability, Payments, Due Next Twelve Months	11
Lease Liability, Payments, Due Next 12 Months	122
Lessee, Operating Lease, Liability, Payments, Due Year Two	117
Finance Lease, Liability, Payments, Due Year Two	14
Lease Liability, Payments, Due Year 2	131
Lessee, Operating Lease, Liability, Payments, Due Year Three	78
Finance Lease, Liability, Payments, Due Year Three	12
Lease liability, Payments Due, Year 3	90
Lessee, Operating Lease, Liability, Payments, Due Year Four	47
Finance Lease, Liability, Payments, Due Year Four	11
Lease Liability, Payments, Due Year 4	58
Lessee, Operating Lease, Liability, Payments, Due Year Five	26
Finance Lease, Liability, Payments, Due Year Five	11
Lease Liability, Payments, Due Year 5	37
Lessee, Operating Lease, Liability, Payments, Due after Year Five	100
Finance Lease, Liability, Payments, Due after Year Five	76
Lease Liability Payments, Due after Year 5	176
Lessee, Operating Lease, Liability, Payments, Due	479
Finance Lease, Liability, Payments, Due	135
Lease Liability, Payments, Total	614
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	61	[1]
Finance Lease, Liability, Undiscounted Excess Amount	36	[1]
Lease liability, undiscounted excess amount	97	[1]
Operating Lease, Liability	418
Finance Lease, Liability	99
Lease Liability, Total	$ 517

[1] Calculated using the interest rate for each lease.