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COMMITMENTS AND CONTINGENCIES Indemnifications with Corning (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Dow Silicones Corporation [Member] |  |
Loss Contingencies [Line Items] |  |
Indemnification Asset | $ 96 | $ 95

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- Definition Indemnification Asset + References No definition available. + Details
Name: | dow_IndemnificationAsset
Namespace Prefix: | dow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | dei_LegalEntityAxis=dow_DowSiliconesCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |