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            <identifier scheme="http://www.sec.gov/CIK">0001751788</identifier>
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            <startDate>2026-04-09</startDate>
            <endDate>2026-04-09</endDate>
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    <dei:AmendmentFlag contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-204">true</dei:AmendmentFlag>
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    <dei:DocumentType contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-215">8-K/A</dei:DocumentType>
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    <dei:EntityFileNumber contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-217">001-38646</dei:EntityFileNumber>
    <dei:EntityRegistrantName contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-218">Dow Inc.</dei:EntityRegistrantName>
    <dei:EntityAddressAddressLine1 contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-219">2211 H.H. Dow Way</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-220">Midland</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-221">MI</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-222">48674</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-223">989</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-224">636-1000</dei:LocalPhoneNumber>
    <dei:EntityIncorporationStateCountryCode contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-225">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityTaxIdentificationNumber contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-226">30-1128146</dei:EntityTaxIdentificationNumber>
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    <dei:PreCommencementIssuerTenderOffer contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-230">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-231">Common Stock, par value $0.01 per share</dei:Security12bTitle>
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    <dei:AmendmentDescription contextRef="duration_2026-04-09_to_2026-04-09" id="ixv-179">On April&#160;14, 2026, Dow Inc. (&#x201c;Dow&#x201d; or the &#x201c;Company&#x201d;) filed a Current Report on Form 8-K with the U.S. Securities and Exchange Commission (the &#x201c;SEC&#x201d;) reporting that the Board of Directors of the Company (the &#x201c;Board&#x201d;) appointed Karen S. Carter as Chief Executive Officer of the Company, effective July&#160;1, 2026 (the &#x201c;Original Filing&#x201d;). This Form 8-K/A amends and supplements the Original Filing to provide a description of the material changes to Ms.&#160;Carter&#x2019;s compensation in connection with her appointment as Chief Executive Officer, which had not been determined by the Board at the time of the Original Filing. </dei:AmendmentDescription>
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