PROPERTY, PLANT AND EQUIPMENT AND OPERATING LEASE RIGHT-OF-USE ASSETS - Supplemental Information Related to Operating Leases (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Property, Plant and Equipment [Abstract]
Operating cash flows used for operating leases	$ 274
Right-of-use assets obtained in exchange for new lease liabilities	$ 201
Weighted-average remaining lease term	7 years 7 months 6 days
Weighted-average discount rate	5.00%