FINANCIAL INSTRUMENTS - Effects of Derivative Financial Instruments (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Revenues	$ 20,524,000,000	$ 22,202,000,000
Cost of sales	15,695,000,000	16,208,000,000
Interest and other financial charges	794,000,000	1,065,000,000
SG&A	3,065,000,000	3,402,000,000
Other income (Note 23)	6,869,000,000	847,000,000
Fair Value Hedges
Amount excluded for cash flow hedges	15,000,000	0
Revenues
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total effect of cash flow hedges	(21,000,000)	20,000,000
Fair Value Hedges
Total effect of derivatives not designated as hedges	(545,000,000)	386,000,000
Cost of sales
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total effect of cash flow hedges	(25,000,000)	(9,000,000)
Fair Value Hedges
Total effect of derivatives not designated as hedges	13,000,000	9,000,000
Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total effect of cash flow hedges	(10,000,000)	(10,000,000)
Fair Value Hedges
Hedged items	(2,480,000,000)	(527,000,000)
Derivatives designated as hedging instruments	2,511,000,000	515,000,000
Total effect of fair value hedges	31,000,000	(11,000,000)
Total effect of derivatives not designated as hedges	(9,000,000)	80,000,000
SG&A
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total effect of cash flow hedges	(3,000,000)	(1,000,000)
Fair Value Hedges
Total effect of derivatives not designated as hedges	(106,000,000)	(45,000,000)
Other Income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total effect of cash flow hedges	0	0
Fair Value Hedges
Total effect of derivatives not designated as hedges	(12,000,000)	16,000,000
Interest rate contracts | Revenues
Fair Value Hedges
Total effect of derivatives not designated as hedges	(23,000,000)	(4,000,000)
Interest rate contracts | Cost of sales
Fair Value Hedges
Total effect of derivatives not designated as hedges	0	0
Interest rate contracts | Interest Expense
Fair Value Hedges
Total effect of derivatives not designated as hedges	(9,000,000)	(16,000,000)
Interest rate contracts | SG&A
Fair Value Hedges
Total effect of derivatives not designated as hedges	0	0
Interest rate contracts | Other Income
Fair Value Hedges
Total effect of derivatives not designated as hedges	0	0
Currency exchange contracts | Revenues
Fair Value Hedges
Total effect of derivatives not designated as hedges	(521,000,000)	390,000,000
Currency exchange contracts | Cost of sales
Fair Value Hedges
Total effect of derivatives not designated as hedges	13,000,000	9,000,000
Currency exchange contracts | Interest Expense
Fair Value Hedges
Total effect of derivatives not designated as hedges	0	0
Currency exchange contracts | SG&A
Fair Value Hedges
Total effect of derivatives not designated as hedges	54,000,000	(45,000,000)
Currency exchange contracts | Other Income
Fair Value Hedges
Total effect of derivatives not designated as hedges	11,000,000	3,000,000
Other | Revenues
Fair Value Hedges
Total effect of derivatives not designated as hedges	0	0
Other | Cost of sales
Fair Value Hedges
Total effect of derivatives not designated as hedges	0	0
Other | Interest Expense
Fair Value Hedges
Total effect of derivatives not designated as hedges	0	96,000,000
Other | SG&A
Fair Value Hedges
Total effect of derivatives not designated as hedges	(160,000,000)	0
Other | Other Income
Fair Value Hedges
Total effect of derivatives not designated as hedges	$ (22,000,000)	$ 13,000,000