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Note 7 - Restructuring, Impairment and Plant Closing Costs - Cash and Noncash Restructuring Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Cash charges, net | $ 6 | $ 43 | $ 11 | $ 43
Asset, Impairment Loss | 0 | 77 | 0 | 77
Accelerated depreciation | 2 | 4 | 3 | 6
Other noncash charges (credits), net | 1 | 0 | 1 | (1)
Total restructuring, impairment and plant closing credits | $ 9 | $ 124 | $ 15 | $ 125

X
- Definition Amount of restructuring cash changes associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate amount provided for estimated restructuring charges, asset impairment loss and plant closing cost incurred during an accounting period. + References No definition available. + Details
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Namespace Prefix: | hun_
Data Type: | xbrli:monetaryItemType
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X
- Definition Represents the amount of other non-cash charges associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References No definition available. + Details
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Namespace Prefix: | hun_
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X
- Definition Amount of impairment loss for asset. Includes, but is not limited to, tangible and intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 942 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480095/942-10-S50-1 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 942 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480035/942-10-S99-6 + Details
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X
- Definition Amount of accelerated depreciation charged against earnings associated with exit from or disposal of business activities or restructuring plan. + References No definition available. + Details
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