Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS - AMOUNTS RECOGNIZED AND AMOUNTS EXPECTED TO BE RECOGNIZED IN OTHER COMPREHENSIVE INCOME LOSS AND COMPONENTS OF NET PERIODIC BENEFIT COST (Details)

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EMPLOYEE BENEFIT PLANS - AMOUNTS RECOGNIZED AND AMOUNTS EXPECTED TO BE RECOGNIZED IN OTHER COMPREHENSIVE INCOME LOSS AND COMPONENTS OF NET PERIODIC BENEFIT COST (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Components of net periodic benefit cost      
Amortization of actuarial loss $ 73 $ 55 $ 66
HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES      
Components of net periodic benefit cost      
Amortization of actuarial loss 76 58 68
Defined Benefit Plans | United States      
Amounts recognized in accumulated other comprehensive loss:      
Net actuarial loss 419 407  
Prior service credit (15) (17)  
Total 404 390  
Amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost during the next fiscal year      
Actuarial loss 33    
Prior service credit (2)    
Total 31    
Components of net periodic benefit cost      
Service cost 30 30 32
Interest cost 44 47 42
Expected return on plan assets (55) (54) (56)
Amortization of prior service credit (2) (5) (6)
Amortization of actuarial loss 30 25 32
Net periodic benefit cost 47 43 44
Defined Benefit Plans | United States | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES      
Amounts recognized in accumulated other comprehensive loss:      
Net actuarial loss 420 408  
Prior service credit (15) (17)  
Total 405 391  
Amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost during the next fiscal year      
Actuarial loss 33    
Prior service credit (2)    
Total 31    
Components of net periodic benefit cost      
Service cost 30 30 32
Interest cost 44 47 42
Expected return on plan assets (55) (54) (56)
Amortization of prior service credit (2) (5) (6)
Amortization of actuarial loss 30 25 32
Net periodic benefit cost 47 43 44
Defined Benefit Plans | Non-U.S. Defined Benefit Plans      
Amounts recognized in accumulated other comprehensive loss:      
Net actuarial loss 1,000 1,100  
Prior service credit (29) (31)  
Total 971 1,069  
Amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost during the next fiscal year      
Actuarial loss 38    
Prior service credit (5)    
Total 33    
Components of net periodic benefit cost      
Service cost 33 29 34
Interest cost 35 41 45
Expected return on plan assets (100) (93) (93)
Amortization of prior service credit (5) (4) (1)
Amortization of actuarial loss 45 31 34
Special termination benefits 1   1
Net periodic benefit cost 9 4 20
Defined Benefit Plans | Non-U.S. Defined Benefit Plans | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES      
Amounts recognized in accumulated other comprehensive loss:      
Net actuarial loss 1,030 1,137  
Prior service credit (29) (31)  
Total 1,001 1,106  
Amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost during the next fiscal year      
Actuarial loss 41    
Prior service credit (5)    
Total 36    
Components of net periodic benefit cost      
Service cost 33 29 34
Interest cost 35 41 45
Expected return on plan assets (100) (93) (93)
Amortization of prior service credit (5) (4) (1)
Amortization of actuarial loss 48 34 37
Special termination benefits 1   1
Net periodic benefit cost 12 7 23
Other Postretirement Benefit Plans | United States      
Amounts recognized in accumulated other comprehensive loss:      
Net actuarial loss 30 45  
Prior service credit (45) (51)  
Total (15) (6)  
Amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost during the next fiscal year      
Actuarial loss 2    
Prior service credit (6)    
Total (4)    
Components of net periodic benefit cost      
Service cost 3 2 4
Interest cost 3 4 5
Amortization of prior service credit (6) (7) (5)
Amortization of actuarial loss 3 2 3
Net periodic benefit cost 3 1 7
Other Postretirement Benefit Plans | United States | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES      
Amounts recognized in accumulated other comprehensive loss:      
Net actuarial loss 30 45  
Prior service credit (45) (51)  
Total (15) (6)  
Amounts in accumulated other comprehensive loss that are expected to be recognized as components of net periodic benefit cost during the next fiscal year      
Actuarial loss 2    
Prior service credit (6)    
Total (4)    
Components of net periodic benefit cost      
Service cost 3 2 4
Interest cost 3 4 5
Amortization of prior service credit (6) (7) (5)
Amortization of actuarial loss 3 2 3
Net periodic benefit cost $ 3 1 $ 7
Other Postretirement Benefit Plans | Non-U.S. Defined Benefit Plans      
Amounts recognized in accumulated other comprehensive loss:      
Net actuarial loss   1  
Prior service credit   (2)  
Total   (1)  
Other Postretirement Benefit Plans | Non-U.S. Defined Benefit Plans | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES      
Amounts recognized in accumulated other comprehensive loss:      
Net actuarial loss   1  
Prior service credit   (2)  
Total   $ (1)