FINANCIAL INSTRUMENTS AND FAIR VALUE MEASURES 2 (Details) - Significant Observable Inputs (Level 2) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Carrying Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term receivables	$ 336	$ 296
Long-term debt and related current maturities	12,881	13,924
Estimated Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term receivables	323	289
Long-term debt and related current maturities	$ 13,513	$ 14,695