LEASES (Costs) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 75	$ 221
Finance lease cost:
Amortization of leased assets	1	5
Interest on lease liabilities	0	2
Net lease cost	76	228
Short-term leases and variable lease costs	$ 32	$ 90