Quarterly report pursuant to Section 13 or 15(d)

EMPLOYEE BENEFIT PLANS (Details)

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EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Components of net periodic benefit cost    
Amortization of actuarial loss $ 17 $ 19
Contributions to pension and other postretirement benefit plans 25 11
Expected contributions to pension and other postretirement benefit plans during remainder of 2017 73  
HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES    
Components of net periodic benefit cost    
Amortization of actuarial loss 20 20
Defined Benefit Plans    
Components of net periodic benefit cost    
Service cost 17 15
Interest cost 20 20
Expected return on plan assets (43) (38)
Amortization of prior service credit (2) (2)
Amortization of actuarial loss 18 18
Settlement loss 2  
Net periodic benefit cost 12 13
Defined Benefit Plans | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES    
Components of net periodic benefit cost    
Service cost 17 15
Interest cost 20 20
Expected return on plan assets (43) (38)
Amortization of prior service credit (2) (2)
Amortization of actuarial loss 19 19
Settlement loss 2  
Net periodic benefit cost 13 14
Other Postretirement Benefit Plans    
Components of net periodic benefit cost    
Service cost 1 1
Interest cost 1 1
Amortization of prior service credit (1) (2)
Amortization of actuarial loss   1
Net periodic benefit cost 1 1
Other Postretirement Benefit Plans | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES    
Components of net periodic benefit cost    
Service cost 1 1
Interest cost 1 1
Amortization of prior service credit (1) (2)
Amortization of actuarial loss   1
Net periodic benefit cost $ 1 $ 1