SEGMENTS AND GEOGRAPHIC REGIONS Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Net sales	$ 9,712	$ 10,764	$ 27,836	$ 32,747
Business Acquisition, Pro Forma Revenue				32,794
Equity in earnings (losses) of nonconsolidated affiliates	60	(44)	(124)	(73)
Operating EBIT	761	1,117	1,661
Pro Forma Operating EBIT				3,319
Packaging & Specialty Plastics [Member]
Segment Reporting Information [Line Items]
Net sales	4,565	5,062	13,175	15,405
Business Acquisition, Pro Forma Revenue				15,405
Equity in earnings (losses) of nonconsolidated affiliates	71	23	96	135
Operating EBIT	647	798	1,545
Pro Forma Operating EBIT				2,256
Industrial Intermediates & Infrastructure [Member]
Segment Reporting Information [Line Items]
Net sales	3,058	3,365	8,520	10,187
Business Acquisition, Pro Forma Revenue				10,196
Equity in earnings (losses) of nonconsolidated affiliates	(13)	(70)	(202)	(196)
Operating EBIT	104	193	59
Pro Forma Operating EBIT				624
Performance Materials & Coatings [Member]
Segment Reporting Information [Line Items]
Net sales	2,002	2,250	5,922	6,888
Business Acquisition, Pro Forma Revenue				6,926
Equity in earnings (losses) of nonconsolidated affiliates	1	2	4	3
Operating EBIT	75	200	264
Pro Forma Operating EBIT				685
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Net sales	87	87	219	267
Business Acquisition, Pro Forma Revenue				267
Equity in earnings (losses) of nonconsolidated affiliates	1	1	(22)	(15)
Operating EBIT	$ (65)	$ (74)	$ (207)
Pro Forma Operating EBIT				$ (246)