Quarterly report pursuant to Section 13 or 15(d)

EMPLOYEE BENEFIT PLANS (Details)

v3.20.2
EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Components of net periodic benefit cost        
Amortization of actuarial loss $ 20 $ 16 $ 57 $ 49
Contributions to pension and other postretirement benefit plans     73 67
Expected contributions to pension and other postretirement benefit plans during remainder of the year 16   16  
HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES        
Components of net periodic benefit cost        
Amortization of actuarial loss 20 17 59 52
Defined Benefit Plans        
Components of net periodic benefit cost        
Service cost 13 14 39 39
Interest cost 15 19 46 59
Expected return on assets (44) (40) (129) (118)
Amortization of prior service benefit (2) (1) (5) (4)
Amortization of actuarial loss 21 17 60 51
Net periodic benefit cost 3 9 11 27
Defined Benefit Plans | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES        
Components of net periodic benefit cost        
Service cost 13 14 39 39
Interest cost 15 19 46 59
Expected return on assets (44) (40) (129) (118)
Amortization of prior service benefit (2) (1) (5) (4)
Amortization of actuarial loss 21 17 62 53
Net periodic benefit cost 3 9 13 29
Other Postretirement Benefit Plans        
Components of net periodic benefit cost        
Service cost     1 1
Interest cost 1 1 2 2
Amortization of prior service benefit (2) (1) (4) (4)
Amortization of actuarial loss 1   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 2 2
Amortization of prior service benefit (2) $ (1) (4) (4)
Amortization of actuarial loss $ 1   $ 1 $ 1