Annual report pursuant to Section 13 and 15(d)

Note 18 - Employee Benefit Plans (Details Textual)

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Note 18 - Employee Benefit Plans (Details Textual)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2029
May 05, 2016
shares
Defined Contribution Plan, Cost $ 29,000 $ 24,000 $ 18,000    
Deferred Compensation Arrangement with Individual, Percentage of Salary, Maximum Defer 75.00%        
Deferred Compensation Plan Assets $ 41,000 48,000      
Deferred Compensation Arrangement, Compensation Expense $ 1,000 $ 1,000 1,000    
Huntsman Corporation 2016 Stock Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) | shares         8,200
Huntsman Corporation Stock Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) | shares         0
Money Purchase Pension Plan [Member] | UNITED STATES          
Defined Contribution Plan, Employer Non-discretionary Contribution, Percent 8.00%        
Maximum [Member] | Salary Deferral Plan for New Hires [Member] | UNITED STATES          
Defined Contribution Plan, Employer Non-discretionary Contribution, Percent 6.00%        
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 4.00%        
Defined Contribution Plan, Employer Contribution, Percent of Employees' Gross Pay 10.00%        
Maximum [Member] | Money Purchase Pension Plan [Member] | UNITED STATES          
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay 4.00%        
Pension Plan [Member]          
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year 6.75% 6.00%      
Defined Benefit Plan, Plan Assets, Amount, Ending Balance $ 2,100,000 $ 2,900,000      
Pension Plan [Member] | Fair Value, Inputs, Level 3 [Member]          
Defined Benefit Plan, Accumulated Benefit Obligation 2,057,000 2,938,000      
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3 0 0      
Pension Plan [Member] | Forecast [Member]          
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year       5.00%  
Pension Plan [Member] | UNITED STATES          
Defined Benefit Plan, Plan Assets, Amount, Ending Balance $ 691,000 $ 925,000 $ 866,000    
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 7.17% 7.52% 7.52%    
Pension Plan [Member] | UNITED STATES | Fair Value, Inputs, Level 3 [Member]          
Defined Benefit Plan, Plan Assets, Amount, Ending Balance $ 0 $ 12,000      
Pension Plan [Member] | Minimum [Member]          
Defined Benefit Plan, Cash Balance, Plan Annual Pay Credits, Percentage of Eligible Pay 6.00%        
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 4.80%        
Pension Plan [Member] | Maximum [Member]          
Defined Benefit Plan, Cash Balance, Plan Annual Pay Credits, Percentage of Eligible Pay 12.00%        
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 7.52%        
Other Postretirement Benefits Plan [Member]          
Number Of Fully Insured Medicare Part D Plans 2        
Other Postretirement Benefits Plan [Member] | UNITED STATES          
Defined Benefit Plan, Plan Assets, Amount, Ending Balance $ 0 $ 0 $ 0