GOODWILL AND OTHER INTANGIBLE ASSETS (Annual Goodwill Impairment Test) (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) ReportingUnits	Dec. 31, 2017 USD ($) ReportingUnits	Dec. 31, 2016 USD ($) ReportingUnits
Goodwill [Line Items]
Goodwill, Impaired, Accumulated Impairment Loss	$ 1,920	$ 1,920	$ 1,920
Number of Reporting Units, Quantitative Testing | ReportingUnits		2	11	3
Goodwill	13,938	$ 13,848	$ 13,938	$ 15,272
Coatings and Performance Monomers
Goodwill [Line Items]
Goodwill impairment	(1,491)		(1,491)
Goodwill	$ 1,071		$ 1,071