Quarterly report pursuant to Section 13 or 15(d)

EMPLOYEE BENEFIT PLANS (Details)

v3.19.3
EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Components of net periodic benefit cost        
Amortization of actuarial loss $ 16 $ 18 $ 49 $ 50
Contributions to pension and other postretirement benefit plans     67 67
Expected contributions to pension and other postretirement benefit plans during remainder of the year 10   10  
HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES        
Components of net periodic benefit cost        
Amortization of actuarial loss 17 18 52 52
Defined Benefit Plans        
Components of net periodic benefit cost        
Service cost 14 13 39 41
Interest cost 19 20 59 57
Expected return on assets (40) (40) (118) (122)
Amortization of prior service benefit (1) (2) (4) (5)
Amortization of actuarial loss 17 17 51 52
Settlement loss       2
Net periodic benefit cost 9 8 27 25
Defined Benefit Plans | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES        
Components of net periodic benefit cost        
Service cost 14 13 39 41
Interest cost 19 20 59 57
Expected return on assets (40) (40) (118) (122)
Amortization of prior service benefit (1) (2) (4) (5)
Amortization of actuarial loss 17 18 53 54
Settlement loss       2
Net periodic benefit cost 9 9 29 27
Other Postretirement Benefit Plans        
Components of net periodic benefit cost        
Service cost     1 1
Interest cost 1   2 2
Amortization of prior service benefit (1) (1) (4) (4)
Amortization of actuarial loss   1 1 2
Net periodic benefit cost       1
Other Postretirement Benefit Plans | HUNTSMAN INTERNATIONAL LLC AND SUBSIDIARIES        
Components of net periodic benefit cost        
Service cost     1 1
Interest cost 1   2 2
Amortization of prior service benefit $ (1) (1) (4) (4)
Amortization of actuarial loss   $ 1 $ 1 2
Net periodic benefit cost       $ 1