PENSION AND OTHER POSTRETIREMENT BENEFITS 4 (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
United States [Member]
Future Benefit Payments [Abstract]
2019	$ 1,177
2020	1,171
2021	1,167
2022	1,163
2023	1,160
2024-2028	5,564
Funding Policy Paragraph Details [Line Items]
Pension notional amount	2,808	$ 4,188
Non-U.S. Pension Plans, Defined Benefit [Member]
Future Benefit Payments [Abstract]
2019	254
2020	259
2021	266
2022	273
2023	280
2024-2028	1,519
Funding Policy Paragraph Details [Line Items]
Pension notional amount	111	$ 133
Cash pension contributions	$ 115
Non-U.S. Pension Plans, Defined Benefit [Member] | Scenario Forecast [Member]
Funding Policy Paragraph Details [Line Items]
Contributions to pension plans			$ 42
Other Postretirement Benefits [Member]
Defined Benefit Plan Assumed Health Care Cost Trend Rates Abstract
Health care cost trend rate assumed for next year	7.00%	6.50%
Rate that the cost trend rate gradually declines to	5.00%	5.00%
Year that rate reaches the rate it is assumed to remain at	2029	2023
Effect Of One Percentage Point [abstract]
Increase on service and interest	$ 1
Decrease on service and interest	(1)
Increase on postretirement benefit obligation	18
Decrease on postretirement benefit obligation	(14)
Other Postretirement Benefits [Member] | Without Impact of Medicare Subsidy [Member]
Future Benefit Payments [Abstract]
2019	52
2020	48
2021	44
2022	40
2023	38
2024-2028	109
Other Postretirement Benefits [Member] | Net of Medicare Subsidy [Member]
Future Benefit Payments [Abstract]
2019	48
2020	44
2021	40
2022	37
2023	34
2024-2028	$ 98