Quarterly report pursuant to Section 13 or 15(d)

EMPLOYEE BENEFIT PLANS (Details)

v3.20.1
EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Components of net periodic benefit cost    
Amortization of actuarial loss $ 18 $ 17
Contributions to pension and other postretirement benefit plans 20 20
Expected contributions to pension and other postretirement benefit plans during remainder of the year 67  
HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES    
Components of net periodic benefit cost    
Amortization of actuarial loss 18 18
Defined Benefit Plans    
Components of net periodic benefit cost    
Service cost 14 13
Interest cost 15 20
Expected return on assets (43) (39)
Amortization of prior service benefit (2) (2)
Amortization of actuarial loss 20 17
Net periodic benefit cost 4 9
Defined Benefit Plans | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES    
Components of net periodic benefit cost    
Service cost 14 13
Interest cost 15 20
Expected return on assets (43) (39)
Amortization of prior service benefit (2) (2)
Amortization of actuarial loss 21 18
Net periodic benefit cost 5 10
Other Postretirement Benefit Plans    
Components of net periodic benefit cost    
Interest cost 1 1
Amortization of prior service benefit (1) (1)
Other Postretirement Benefit Plans | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES    
Components of net periodic benefit cost    
Interest cost 1 1
Amortization of prior service benefit $ (1) $ (1)