BUSINESS AND GEOGRAPHIC REGIONS (Sales to External Customers by Principal Product Group) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from External Customer [Line Items]
Net sales	$ 14,610	$ 14,976	$ 15,793	$ 14,899	$ 14,811	$ 13,633	$ 13,834	$ 13,230	$ 60,278	$ 55,508	$ 48,158
Coatings & Performance Monomers
Revenue from External Customer [Line Items]
Net sales									3,987	3,761	3,362
Consumer Solutions
Revenue from External Customer [Line Items]
Net sales									5,660	5,067	3,077
Crop Protection
Revenue from External Customer [Line Items]
Net sales									4,666	4,553	4,628
Electronics & Imaging
Revenue from External Customer [Line Items]
Net sales									2,630	2,615	2,307
Hydrocarbons & Energy
Revenue from External Customer [Line Items]
Net sales									7,401	6,831	5,088
Industrial Biosciences
Revenue from External Customer [Line Items]
Net sales									500	484	419
Industrial Solutions
Revenue from External Customer [Line Items]
Net sales									4,736	4,083	3,675
Nutrition & Health
Revenue from External Customer [Line Items]
Net sales									598	563	529
Packaging and Specialty Plastics
Revenue from External Customer [Line Items]
Net sales									15,239	14,110	13,316
Polyurethanes & CAV
Revenue from External Customer [Line Items]
Net sales									10,368	8,548	7,143
Safety & Construction
Revenue from External Customer [Line Items]
Net sales									1,983	1,932	1,877
Seed
Revenue from External Customer [Line Items]
Net sales									1,003	1,393	1,545
Transportation & Advanced Polymers
Revenue from External Customer [Line Items]
Net sales									1,202	1,167	897
Other
Revenue from External Customer [Line Items]
Net sales									20	18	14
Corporate, Non-Segment
Revenue from External Customer [Line Items]
Net sales									$ 285	$ 383	$ 281