GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of Goodwill (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 8,833	$ 8,908
Goodwill, Foreign Currency Translation Gain (Loss)	(75)
Packaging & Specialty Plastics [Member]
Goodwill [Line Items]
Goodwill	5,111	5,115
Goodwill, Foreign Currency Translation Gain (Loss)	(4)
Industrial Intermediates & Infrastructure [Member]
Goodwill [Line Items]
Goodwill	1,098	1,100
Goodwill, Foreign Currency Translation Gain (Loss)	(2)
Performance Materials & Coatings [Member]
Goodwill [Line Items]
Goodwill	2,624	$ 2,693
Goodwill, Foreign Currency Translation Gain (Loss)	$ (69)