GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of Goodwill (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 8,801	$ 8,908
Goodwill, Foreign Currency Translation Gain (Loss)	(107)
Packaging & Specialty Plastics [Member]
Goodwill [Line Items]
Goodwill	5,108	5,115
Goodwill, Foreign Currency Translation Gain (Loss)	(7)
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	2,596	$ 2,693
Goodwill, Foreign Currency Translation Gain (Loss)	$ (97)