SEGMENTS AND GEOGRAPHIC REGIONS Segment Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Net sales	$ 8,354	$ 11,014	$ 18,124	$ 21,983
Business Acquisition, Pro Forma Revenue				22,030
Equity in losses of nonconsolidated affiliates	(95)	(15)	(184)	(29)
Operating EBIT	57	1,059	900
Pro Forma Operating EBIT				2,202
Packaging & Specialty Plastics [Member]
Segment Reporting Information [Line Items]
Net sales	4,001	5,205	8,610	10,343
Business Acquisition, Pro Forma Revenue				10,343
Equity in losses of nonconsolidated affiliates	20	74	25	112
Operating EBIT	318	768	898
Pro Forma Operating EBIT				1,458
Industrial Intermediates & Infrastructure [Member]
Segment Reporting Information [Line Items]
Net sales	2,417	3,342	5,462	6,822
Business Acquisition, Pro Forma Revenue				6,831
Equity in losses of nonconsolidated affiliates	(113)	(78)	(189)	(126)
Operating EBIT	(220)	154	(45)
Pro Forma Operating EBIT				431
Performance Materials & Coatings [Member]
Segment Reporting Information [Line Items]
Net sales	1,855	2,356	3,920	4,638
Business Acquisition, Pro Forma Revenue				4,676
Equity in losses of nonconsolidated affiliates	2	1	3	1
Operating EBIT	27	214	189
Pro Forma Operating EBIT				485
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Net sales	81	111	132	180
Business Acquisition, Pro Forma Revenue				180
Equity in losses of nonconsolidated affiliates	(4)	(12)	(23)	(16)
Operating EBIT	$ (68)	$ (77)	$ (142)
Pro Forma Operating EBIT				$ (172)

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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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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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