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SEGMENT AND REGIONAL SALES INFORMATION (Details) $ in Millions		3 Months Ended
		Mar. 31, 2021 USD ($) Segment	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | Segment		4
Sales [Abstract]
Sales		$ 2,409	$ 2,241
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		389	368
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	16,195		$ 16,083
Operating Segments [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		395	376
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	14,335		14,175
Growth Initiatives and Businesses not Allocated to Segments [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		(29)	(23)
Pension and OPEB Costs Not Allocated to Operating Segments [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		27	21
Other Nonoperating Income (Expense) [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		(4)	(6)
Additives And Functional Products [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		135	143
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	6,304		6,238
Additives And Functional Products [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		871	822
Advanced Materials [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		146	100
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	4,392		4,345
Advanced Materials [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		716	615
Chemical Intermediates [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		69	80
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	2,643		2,614
Chemical Intermediates [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		605	592
Fibers [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		45	53
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	996		978
Fibers [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		217	212
Corporate and Other
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	1,860		$ 1,908
North America [Member]
Sales [Abstract]
Sales		1,004	980
Asia Pacific [Member]
Sales [Abstract]
Sales		608	495
EMEA [Member]
Sales [Abstract]
Sales		656	631
Latin America [Member]
Sales [Abstract]
Sales		$ 141	$ 135
[1] Segment assets include accounts receivable, inventory, fixed assets, goodwill, and intangible assets.

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