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SEGMENT INFORMATION (Details) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Segment	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | Segment				4
Contract with Customer, Asset, after Allowance for Credit Loss		$ 63		$ 63		$ 62
Sales [Abstract]
Sales		2,363	$ 2,621	4,743	$ 5,228
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		371	491	691	900
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	16,256		16,256		15,995
Operating Segments [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		406	510	769	934
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	15,009		15,009		14,913
Corporate, Non-Segment [Member]
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	1,247		1,247		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		(25)	(27)	(52)	(53)
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		11	20	23	41
Restructuring and acquisition integration and transaction costs [Member] | Corporate, Non-Segment [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		(18)	(4)	(46)	(6)
Other Nonoperating Income (Expense) [Member] | Corporate, Non-Segment [Member]
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		(3)	(8)	(3)	(16)
Additives And Functional Products [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		823	942	1,678	1,881
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		147	192	293	368
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	6,520		6,520		6,545
Advanced Materials [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		696	729	1,353	1,422
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		145	150	247	285
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	4,593		4,593		4,456
Chemical Intermediates [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		631	709	1,286	1,439
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		63	85	136	155
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	2,851		2,851		2,934
Fibers [Member] | Operating Segments [Member]
Sales [Abstract]
Sales		213	241	426	486
Earnings (Loss) Before Interest and Taxes [Abstract]
Earnings before interest and taxes		51	83	93	126
Segment Reporting Information, Additional Information [Abstract]
Assets by Segment	[1]	1,045		1,045		$ 978
North America [Member]
Sales [Abstract]
Sales		995	1,108	1,995	2,208
Asia Pacific [Member]
Sales [Abstract]
Sales		574	639	1,127	1,281
EMEA [Member]
Sales [Abstract]
Sales		649	725	1,338	1,452
Latin America [Member]
Sales [Abstract]
Sales		$ 145	$ 149	$ 283	$ 287
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