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Note 6 - Restructuring, Impairment and Plant Closing Costs (Credits) - Cash and Noncash Restructuring Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
(Credits) charges | $ 0 | $ 13 | $ 0 | $ 37
Accelerated depreciation | 5 | 0 | 6 | 0
Gain on sale of assets | 0 | (2) |  | (2)
Other noncash charges | 1 | 1 | 1 | 1
Total restructuring, impairment and plant closing costs | $ 6 | $ 12 | $ 7 | $ 36

X
- Definition Amount of gain on sale of land during the period due to restructuring. + References No definition available. + Details
Name: | hun_RestructuringAndRelatedCostGainOnSaleOfAssets
Namespace Prefix: | hun_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of charges or credits associated with exit or disposal activities pursuant to an authorized plan. + References No definition available. + Details
Name: | hun_RestructuringChargesCredits
Namespace Prefix: | hun_
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
Name: | hun_RestructuringImpairmentAndPlantClosingCosts
Namespace Prefix: | hun_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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
Name: | hun_RestructuringReserveOtherNonCashCharges
Namespace Prefix: | hun_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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
Name: | us-gaap_RestructuringReserveAcceleratedDepreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration