Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Employee Benefit Plans - Components of Net Periodic Benefit Costs (Details)

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Note 11 - Employee Benefit Plans - Components of Net Periodic Benefit Costs (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Amortization of actuarial loss $ 10 $ 10 $ 25 $ 32
Huntsman International LLC [Member]        
Amortization of actuarial loss 10 10 25 32
Defined Benefit Plans [Member]        
Service cost 6 11 19 34
Interest cost 24 13 70 41
Expected return on assets (32) (37) (95) (113)
Amortization of prior service benefit (2) (2) (4) (4)
Amortization of actuarial loss 9 12 25 36
Net periodic benefit cost (credit) 5 (3) 15 (6)
Defined Benefit Plans [Member] | Huntsman International LLC [Member]        
Service cost 6 11 19 34
Interest cost 24 13 70 41
Expected return on assets (32) (37) (95) (113)
Amortization of prior service benefit (2) (2) (4) (4)
Amortization of actuarial loss 9 12 25 36
Net periodic benefit cost (credit) 5 (3) 15 (6)
Other Postretirement Benefits Plan [Member]        
Service cost 1 1 1 1
Interest cost 0 0 2 1
Expected return on assets 0 0 0 0
Amortization of prior service benefit (2) (1) (4) (3)
Amortization of actuarial loss 0 0 0 1
Net periodic benefit cost (credit) (1) 0 (1) 0
Other Postretirement Benefits Plan [Member] | Huntsman International LLC [Member]        
Service cost 1 1 1 1
Interest cost 0 0 2 1
Expected return on assets 0 0 0 0
Amortization of prior service benefit (2) (1) (4) (3)
Amortization of actuarial loss 0 0 0 1
Net periodic benefit cost (credit) $ (1) $ 0 $ (1) $ 0