RESTRUCTURING, GOODWILL IMPAIRMENT AND ASSET RELATED CHARGES - NET (Goodwill Impairment and Asset Related Charges) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Goodwill, Impairment Loss										$ (1,039)
Asset Impairment Charges									$ 49
Restructuring, goodwill impairment and asset related charges - net	$ (11)	$ 617	$ 6	$ 96	$ 2,851	$ 147	$ 65	$ 156	708	3,219	$ 221
Sadara Chemical Company
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net					1,755					1,755
Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Goodwill, Impairment Loss					$ (1,039)					(1,039)
Restructuring, goodwill impairment and asset related charges - net									192	1,076	21
Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Goodwill, Impairment Loss										0
Restructuring, goodwill impairment and asset related charges - net									30	439	46
Packaging & Specialty Plastics [Member] | Sadara Chemical Company
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										370
Industrial Intermediates & Infrastructure [Member]
Restructuring Cost and Reserve [Line Items]
Goodwill, Impairment Loss										0
Restructuring, goodwill impairment and asset related charges - net									22	1,175	11
Industrial Intermediates & Infrastructure [Member] | Sadara Chemical Company
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										1,168
Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net									464	529	143
Corporate Segment [Member] | Sadara Chemical Company
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										217
Manufacturing Facility
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										58
Manufacturing Facility | Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										9
Manufacturing Facility | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										44	$ 34
Manufacturing Facility | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										5
Fair Value, Measurements, Nonrecurring | Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									15
Fair Value, Measurements, Nonrecurring | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									19
Fair Value, Measurements, Nonrecurring | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									15
Fair Value, Measurements, Nonrecurring | Manufacturing Facility | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									$ 19	44
Fair Value, Measurements, Nonrecurring | Manufacturing Assets
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										75
Fair Value, Measurements, Nonrecurring | Manufacturing Assets | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										24
Fair Value, Measurements, Nonrecurring | Manufacturing Assets | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										$ 51