Annual report pursuant to Section 13 and 15(d)

OTHER COMPREHENSIVE (LOSS) INCOME - RECLASSIFICATION DETAILS - HUNTSMAN INTERNATIONAL (Details)

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OTHER COMPREHENSIVE (LOSS) INCOME - RECLASSIFICATION DETAILS - HUNTSMAN INTERNATIONAL (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Pension and other postretirement benefits adjustments      
Reclassification from accumulated other comprehensive loss      
Total before tax $ 62 $ 77 $ 80
Income tax benefit (expense) (12) (13) (14)
Net of tax 50 64 66
Pension and other postretirement benefits adjustments | Discontinued Operations      
Reclassification from accumulated other comprehensive loss      
Total before tax 7 22 22
Pension and other postretirement benefits adjustments | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES      
Reclassification from accumulated other comprehensive loss      
Total before tax 65 80 86
Income tax benefit (expense) (12) (14) (15)
Net of tax 53 66 71
Pension and other postretirement benefits adjustments | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES | Discontinued Operations      
Reclassification from accumulated other comprehensive loss      
Total before tax 7 22 29
Prior service credit      
Reclassification from accumulated other comprehensive loss      
Total before tax (11) (12) (15)
Prior service credit | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES      
Reclassification from accumulated other comprehensive loss      
Total before tax (11) (12) (15)
Settlement loss      
Reclassification from accumulated other comprehensive loss      
Total before tax 1 2  
Settlement loss | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES      
Reclassification from accumulated other comprehensive loss      
Total before tax 1 2  
Actuarial loss | Discontinued Operations      
Reclassification from accumulated other comprehensive loss      
Total before tax 72 87 95
Actuarial loss | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES      
Reclassification from accumulated other comprehensive loss      
Total before tax $ 75 $ 90 $ 101