SHARE-BASED COMPENSATION PLAN - ASSUMPTIONS (Details) - Stock options	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Huntsman Plan
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Dividend yield (as a percent)	2.40%	5.60%	2.30%
Expected volatility (as a percent)	56.90%	57.90%	57.60%
Risk-free interest rate (as a percent)	2.00%	1.40%	1.40%
Expected life of stock options granted during the period	5 years 10 months 24 days	5 years 10 months 24 days	5 years 10 months 24 days
Converted Awards
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility (as a percent)	39.60%	39.20%	40.90%
Risk-free interest rate (as a percent)	1.90%	1.80%	1.60%
Expected life of stock options granted during the period	5 years 6 months	4 years 8 months 12 days	4 years
Incentive Plan 2017
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility (as a percent)	41.00%
Risk-free interest rate (as a percent)	2.00%
Expected life of stock options granted during the period	6 years