RESTRUCTURING, GOODWILL IMPAIRMENT AND ASSET RELATED CHARGES - NET (Goodwill Impairment and Asset Related Charges) (Details) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net	$ 2,851	$ 147	$ 65	$ 156	$ 46	$ 48	$ 40	$ 87		$ 3,219	$ 221	$ 2,739
Sadara Chemical Company
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										1,755
Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Goodwill, Impairment Loss	$ (1,039)								$ (1,491)	1,039
Restructuring, goodwill impairment and asset related charges - net										1,076	21	1,578
Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, goodwill impairment and asset related charges - net										439	46	716
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]
Restructuring, goodwill impairment and asset related charges - net										1,175	11	17
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										529	143	$ 428
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									622	44	$ 34
Manufacturing Facility | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										5
Manufacturing Assets, Equity Method Investments, and Other Assets
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									246
Manufacturing Assets, Equity Method Investments, and Other Assets | Performance Materials & Coatings [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									83
Manufacturing Assets, Equity Method Investments, and Other Assets | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									58
Manufacturing Assets, Equity Method Investments, and Other Assets | Industrial Intermediates & Infrastructure [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									5
Manufacturing Assets, Equity Method Investments, and Other Assets | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									100
Manufacturing Assets
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									159
Equity Method Investments
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									81
Other Assets
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges									$ 6
Fair Value, Measurements, Nonrecurring | Manufacturing Facility | Packaging & Specialty Plastics [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges										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