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SEGMENT AND REGIONAL SALES INFORMATION (Details) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) Segment	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | Segment				4
Contract with Customer, Asset, after Allowance for Credit Loss		$ 58		$ 58		$ 62
Sales [Abstract]
Sales		2,325	$ 2,547	7,068	$ 7,775
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		367	517	1,058	1,417
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	16,137		16,137		15,995
Operating Segments [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		388	532	1,157	1,466
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	14,847		14,847		14,913
Corporate, Non-Segment [Member]
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	1,290		1,290		1,082
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		(26)	(26)	(78)	(79)
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		12	20	35	61
Restructuring and acquisition integration and transaction costs [Member] | Corporate, Non-Segment [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		(2)	0	(48)	(6)
Other Nonoperating Income (Expense) [Member] | Corporate, Non-Segment [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		(5)	(9)	(8)	(25)
Additives And Functional Products [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		832	915	2,510	2,796
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		144	186	437	554
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	6,491		6,491		6,545
Advanced Materials [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		697	709	2,050	2,131
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		159	153	406	438
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	4,478		4,478		4,456
Chemical Intermediates [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		579	703	1,865	2,142
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		34	109	170	264
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	2,848		2,848		2,934
Fibers [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		217	220	643	706
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		51	84	144	210
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	1,030		1,030		$ 978
North America [Member]
Sales [Abstract]
Sales		966	1,083	2,961	3,291
Asia Pacific [Member]
Sales [Abstract]
Sales		602	665	1,729	1,946
EMEA [Member]
Sales [Abstract]
Sales		611	649	1,949	2,101
Latin America [Member]
Sales [Abstract]
Sales		$ 146	$ 150	$ 429	$ 437
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