Annual report pursuant to Section 13 and 15(d)

Note 18 - Employee Benefit Plans (Details Textual)

v3.24.0.1
Note 18 - Employee Benefit Plans (Details Textual)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
May 05, 2016
shares
Defined Contribution Plan, Cost $ 27,000 $ 29,000 $ 24,000  
Deferred Compensation Arrangement with Individual, Percentage of Salary, Maximum Defer 75.00%      
Deferred Compensation Plan Assets $ 51,000 41,000    
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 6.50% 6.75%    
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Year Five and Thereafter 5.00%      
Defined Benefit Plan, Plan Assets, Amount $ 2,270,000 $ 2,127,000    
Pension Plan [Member] | Fair Value, Inputs, Level 3 [Member]        
Defined Benefit Plan, Accumulated Benefit Obligation 2,264,000 2,057,000    
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3 0 0    
Pension Plan [Member] | UNITED STATES        
Defined Benefit Plan, Plan Assets, Amount $ 728,000 $ 691,000 $ 925,000  
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 7.18% 7.17% 7.52%  
Pension Plan [Member] | UNITED STATES | Fair Value, Inputs, Level 3 [Member]        
Defined Benefit Plan, Plan Assets, Amount $ 0 $ 0    
Pension Plan [Member] | Minimum [Member]        
Defined Benefit Plan, Cash Balance, Plan Annual Pay Credits, Percentage of Eligible Pay 6.00%      
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 4.80% 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 $ 0 $ 0 $ 0