Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Employee Benefit Plans - Components of Net Periodic Benefit Costs (Details)

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Note 12 - Employee Benefit Plans - Components of Net Periodic Benefit Costs (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Amortization of actuarial loss $ 14 $ 22
Huntsman International LLC [Member]    
Amortization of actuarial loss 14 23
Defined Benefit Plans [Member]    
Service cost 12 14
Interest cost 14 12
Expected return on assets (42) (42)
Amortization of prior service benefit (1) (2)
Amortization of actuarial loss 14 23
Settlement loss 0 3
Net periodic benefit cost (3) 8
Defined Benefit Plans [Member] | Huntsman International LLC [Member]    
Service cost 12 14
Interest cost 14 12
Expected return on assets (42) (42)
Amortization of prior service benefit (1) (2)
Amortization of actuarial loss 14 24
Settlement loss 0 3
Net periodic benefit cost (3) 9
Other Postretirement Benefits Plan [Member]    
Service cost 0 0
Interest cost 0 0
Expected return on assets 0 0
Amortization of prior service benefit (1) (1)
Amortization of actuarial loss 1 1
Settlement loss 0 0
Net periodic benefit cost 0 0
Other Postretirement Benefits Plan [Member] | Huntsman International LLC [Member]    
Service cost 0 0
Interest cost 0 0
Expected return on assets 0 0
Amortization of prior service benefit (1) (1)
Amortization of actuarial loss 1 1
Settlement loss 0 0
Net periodic benefit cost $ 0 $ 0