SEGMENTS AND GEOGRAPHIC REGIONS Segment Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net sales	$ 11,014	$ 12,789	$ 21,983	$ 25,026
Business Acquisition, Pro Forma Revenue		12,851	22,030	25,147
Equity in earnings (losses) of nonconsolidated affiliates	(15)	193	(29)	394
Operating EBIT	1,059
Pro Forma Operating EBIT		1,639	2,202	3,336
Performance Materials & Coatings [Member]
Segment Reporting Information [Line Items]
Net sales	2,356	2,624	4,638	4,951
Business Acquisition, Pro Forma Revenue		2,673	4,676	5,044
Equity in earnings (losses) of nonconsolidated affiliates	1	1	1	1
Operating EBIT	214
Pro Forma Operating EBIT		292	485	647
Industrial Intermediates & Infrastructure [Member]
Segment Reporting Information [Line Items]
Net sales	3,342	3,969	6,822	7,767
Business Acquisition, Pro Forma Revenue		3,972	6,831	7,775
Equity in earnings (losses) of nonconsolidated affiliates	(78)	96	(126)	245
Operating EBIT	154
Pro Forma Operating EBIT		502	431	962
Packaging & Specialty Plastics [Member]
Segment Reporting Information [Line Items]
Net sales	5,205	6,124	10,343	12,162
Business Acquisition, Pro Forma Revenue		6,134	10,343	12,182
Equity in earnings (losses) of nonconsolidated affiliates	74	108	112	167
Operating EBIT	768
Pro Forma Operating EBIT		926	1,458	1,897
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Net sales	111	72	180	146
Business Acquisition, Pro Forma Revenue		72	180	146
Equity in earnings (losses) of nonconsolidated affiliates	(12)	(12)	(16)	(19)
Operating EBIT	$ (77)
Pro Forma Operating EBIT		$ (81)	$ (172)	$ (170)

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Pro Forma Operating EBIT

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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