FINANCIAL INSTRUMENTS AND FAIR VALUE MEASURES 5 (Details) - Designated As Hedging Instrument [Member] - Long-term debt [Member] - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Summary Of Derivative Instruments By Hedge Designation [Line Items]
Carrying Amount of the Hedged Item	$ 2,555	$ 2,592
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Item	$ (45)	$ (8)