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SEGMENT AND REGIONAL SALES INFORMATION (Details) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Segment	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | Segment				4
Sales [Abstract]
Sales		$ 2,122	$ 2,325	$ 6,287	$ 7,068
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		243	367	665	1,058
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	16,009		16,009		$ 16,008
Operating Segments [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		308	388	758	1,157
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	14,102		14,102		14,591
Corporate, Non-Segment [Member]
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	1,907		1,907		1,417
Growth Initiatives and Businesses not Allocated to Segments [Member] | Corporate, Non-Segment [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		(22)	(26)	(73)	(78)
Pension and OPEB Costs Not Allocated to Operating Segments [Member] | Corporate, Non-Segment [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		21	12	62	35
Restructuring and acquisition integration and transaction costs [Member] | Corporate, Non-Segment [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		(54)	(2)	(65)	(48)
Other Nonoperating Income (Expense) [Member] | Corporate, Non-Segment [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		(10)	(5)	(17)	(8)
Additives And Functional Products [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		742	832	2,249	2,510
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		107	144	194	437
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	6,142		6,142		6,387
Advanced Materials [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		668	697	1,850	2,050
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		129	159	293	406
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	4,358		4,358		4,415
Chemical Intermediates [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		506	579	1,559	1,865
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		31	34	131	170
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	2,616		2,616		2,775
Fibers [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		206	217	629	643
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		41	51	140	144
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	986		986		$ 1,014
North America [Member]
Sales [Abstract]
Sales		894	966	2,660	2,961
Asia Pacific [Member]
Sales [Abstract]
Sales		547	602	1,565	1,729
EMEA [Member]
Sales [Abstract]
Sales		556	611	1,713	1,949
Latin America [Member]
Sales [Abstract]
Sales		$ 125	$ 146	$ 349	$ 429
[1] Segment assets include accounts receivable, inventory, fixed assets, goodwill, and intangible assets.

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