GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 8,819	$ 8,908
Goodwill, Foreign Currency Translation Gain (Loss)	(89)
Packaging & Specialty Plastics [Member]
Goodwill [Line Items]
Goodwill	5,110	5,115
Goodwill, Foreign Currency Translation Gain (Loss)	(5)
Industrial Intermediates & Infrastructure [Member]
Goodwill [Line Items]
Goodwill	1,097	1,100
Goodwill, Foreign Currency Translation Gain (Loss)	(3)
Performance Materials & Coatings [Member]
Goodwill [Line Items]
Goodwill	2,612	$ 2,693
Goodwill, Foreign Currency Translation Gain (Loss)	$ (81)