Huntsman Corporation Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Note 19 - Employee Benefit Plans (Details Textual)

Note 19 - Employee Benefit Plans (Details Textual) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) shares	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Apr. 30, 2025 shares
Defined Contribution Plan, Cost	$ 30,000	$ 29,000	$ 27,000
The 2025 Stock Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) \| shares				4,650
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) \| shares	4,600
Money Purchase Pension Plan [Member] \| UNITED STATES
Defined Contribution Plan, Employer Non-discretionary Contribution, Percent	8.00%
Supplemental Salary Deferral Plan and Supplemental Executive Retirement Plan [Member]
Deferred Compensation Arrangement with Individual, Percentage of Salary, Maximum Defer	75.00%
Deferred Compensation Plan Assets	$ 55,000	53,000
Deferred Compensation Arrangement, Compensation Expense	$ 1,000	$ 1,000	1,000
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	7.25%	6.75%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Year Five and Thereafter	5.00%
Defined Benefit Plan, Plan Assets, Amount	$ 2,355,000	$ 2,196,000
Pension Plan [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Accumulated Benefit Obligation	2,156,000	2,103,000
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	748,000	727,000	728,000
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%
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