FINANCIAL INSTRUMENTS AND FAIR VALUE MEASURES 2 (Details) - Significant Observable Inputs (Level 2) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	$ 343	$ 333
Long-term debt and related current maturities	12,598	12,629
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	336	329
Long-term debt and related current maturities	$ 13,299	$ 13,133