<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2025"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2025/ffd-2025.xsd"
      xlink:type="simple"/>
    <context id="c_offering_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002014254</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-26</startDate>
            <endDate>2026-05-26</endDate>
        </period>
    </context>
    <context id="c_offering_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002014254</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-26</startDate>
            <endDate>2026-05-26</endDate>
        </period>
    </context>
    <context id="c_offering_3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002014254</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>3</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-26</startDate>
            <endDate>2026-05-26</endDate>
        </period>
    </context>
    <context id="c_offering_4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002014254</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>4</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-26</startDate>
            <endDate>2026-05-26</endDate>
        </period>
    </context>
    <context id="c_offering_5">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002014254</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>5</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-26</startDate>
            <endDate>2026-05-26</endDate>
        </period>
    </context>
    <context id="c_offering_6">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002014254</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>6</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-26</startDate>
            <endDate>2026-05-26</endDate>
        </period>
    </context>
    <context id="c_report">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002014254</identifier>
        </entity>
        <period>
            <startDate>2026-05-26</startDate>
            <endDate>2026-05-26</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <ffd:SubmissnTp contextRef="c_report" id="fee_001">F-3</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="c_report" id="fee_002">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="c_report" id="fee_003">0002014254</dei:EntityCentralIndexKey>
    <ffd:OfferingTableNa contextRef="c_report" id="fee_004" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="c_report" id="fee_005">N/A</ffd:OffsetTableNa>
    <ffd:CombinedProspectusTableNa contextRef="c_report" id="fee_006">N/A</ffd:CombinedProspectusTableNa>
    <ffd:FormTp contextRef="c_report" id="fee_007">F-3</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="c_report" id="fee_008">FST Corp.</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="c_offering_1" id="fee_009">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_1" id="fee_010">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_1" id="fee_011">Ordinary Shares, $0.0001 par value per share</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="c_offering_1" id="fee_012">true</ffd:Rule457oFlg>
    <ffd:FeeRate
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_013"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:PrevslyPdFlg contextRef="c_offering_2" id="fee_014">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_2" id="fee_015">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_2" id="fee_016">Debt Securities</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="c_offering_2" id="fee_017">true</ffd:Rule457oFlg>
    <ffd:FeeRate
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_018"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:PrevslyPdFlg contextRef="c_offering_3" id="fee_019">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_3" id="fee_020">Other</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_3" id="fee_021">Warrants to purchase Ordinary Shares</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="c_offering_3" id="fee_022">true</ffd:Rule457oFlg>
    <ffd:FeeRate
      contextRef="c_offering_3"
      decimals="INF"
      id="fee_023"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:PrevslyPdFlg contextRef="c_offering_4" id="fee_024">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_4" id="fee_025">Other</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_4" id="fee_026">Rights</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="c_offering_4" id="fee_027">true</ffd:Rule457oFlg>
    <ffd:FeeRate
      contextRef="c_offering_4"
      decimals="INF"
      id="fee_028"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:PrevslyPdFlg contextRef="c_offering_5" id="fee_029">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_5" id="fee_030">Other</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_5" id="fee_031">Units</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="c_offering_5" id="fee_032">true</ffd:Rule457oFlg>
    <ffd:FeeRate
      contextRef="c_offering_5"
      decimals="INF"
      id="fee_033"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:PrevslyPdFlg contextRef="c_offering_6" id="fee_034">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_6" id="fee_035">Unallocated (Universal) Shelf</ffd:OfferingSctyTp>
    <ffd:Rule457oFlg contextRef="c_offering_6" id="fee_036">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_6"
      decimals="INF"
      id="fee_037"
      unitRef="USD">100000000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="c_offering_6"
      decimals="INF"
      id="fee_038"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_6"
      decimals="INF"
      id="fee_039"
      unitRef="USD">13810.00</ffd:FeeAmt>
    <ffd:TtlOfferingAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_040"
      unitRef="USD">100000000.00</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_041"
      unitRef="USD">13810.00</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_042"
      unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_043"
      unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_044"
      unitRef="USD">13810.00</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c_offering_1" id="fee_045">Represents securities that may be offered and sold from time to time in one or more offerings by FST Corp.&lt;br/&gt;&lt;br/&gt;Such indeterminate number or amount of common stock, preferred stock, debt securities, warrants to purchase any combination of the foregoing securities, and units composed of one or more of the foregoing securities, with an aggregate initial offering price not to exceed $100,000,000. Securities registered hereunder may be sold separately or together in any combination with other securities registered hereunder. The securities registered hereunder also include such indeterminate number of shares of common stock and preferred stock and amount of debt securities as may be issued upon conversion of or exchange for securities that provide for conversion or exchange, upon exercise of securities or pursuant to the antidilution provisions of any other securities.&lt;br/&gt;&lt;br/&gt;Estimated solely for purposes of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;).&lt;br/&gt;</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_2" id="fee_046">Represents securities that may be offered and sold from time to time in one or more offerings by FST Corp.&lt;br/&gt;&lt;br/&gt;Such indeterminate number or amount of common stock, preferred stock, debt securities, warrants to purchase any combination of the foregoing securities, and units composed of one or more of the foregoing securities, with an aggregate initial offering price not to exceed $100,000,000. Securities registered hereunder may be sold separately or together in any combination with other securities registered hereunder. The securities registered hereunder also include such indeterminate number of shares of common stock and preferred stock and amount of debt securities as may be issued upon conversion of or exchange for securities that provide for conversion or exchange, upon exercise of securities or pursuant to the antidilution provisions of any other securities.&lt;br/&gt;&lt;br/&gt;Estimated solely for purposes of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;).&lt;br/&gt;</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_3" id="fee_047">Represents securities that may be offered and sold from time to time in one or more offerings by FST Corp.&lt;br/&gt;&lt;br/&gt;Such indeterminate number or amount of common stock, preferred stock, debt securities, warrants to purchase any combination of the foregoing securities, and units composed of one or more of the foregoing securities, with an aggregate initial offering price not to exceed $100,000,000. Securities registered hereunder may be sold separately or together in any combination with other securities registered hereunder. The securities registered hereunder also include such indeterminate number of shares of common stock and preferred stock and amount of debt securities as may be issued upon conversion of or exchange for securities that provide for conversion or exchange, upon exercise of securities or pursuant to the antidilution provisions of any other securities.&lt;br/&gt;&lt;br/&gt;Estimated solely for purposes of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;).&lt;br/&gt;</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_4" id="fee_048">Represents securities that may be offered and sold from time to time in one or more offerings by FST Corp.&lt;br/&gt;&lt;br/&gt;Such indeterminate number or amount of common stock, preferred stock, debt securities, warrants to purchase any combination of the foregoing securities, and units composed of one or more of the foregoing securities, with an aggregate initial offering price not to exceed $100,000,000. Securities registered hereunder may be sold separately or together in any combination with other securities registered hereunder. The securities registered hereunder also include such indeterminate number of shares of common stock and preferred stock and amount of debt securities as may be issued upon conversion of or exchange for securities that provide for conversion or exchange, upon exercise of securities or pursuant to the antidilution provisions of any other securities.&lt;br/&gt;&lt;br/&gt;Estimated solely for purposes of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;).&lt;br/&gt;</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_5" id="fee_049">Represents securities that may be offered and sold from time to time in one or more offerings by FST Corp.&lt;br/&gt;&lt;br/&gt;Such indeterminate number or amount of common stock, preferred stock, debt securities, warrants to purchase any combination of the foregoing securities, and units composed of one or more of the foregoing securities, with an aggregate initial offering price not to exceed $100,000,000. Securities registered hereunder may be sold separately or together in any combination with other securities registered hereunder. The securities registered hereunder also include such indeterminate number of shares of common stock and preferred stock and amount of debt securities as may be issued upon conversion of or exchange for securities that provide for conversion or exchange, upon exercise of securities or pursuant to the antidilution provisions of any other securities.&lt;br/&gt;&lt;br/&gt;Estimated solely for purposes of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;).&lt;br/&gt;</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_6" id="fee_050">Such indeterminate number or amount of common stock, preferred stock, debt securities, warrants to purchase any combination of the foregoing securities, and units composed of one or more of the foregoing securities, with an aggregate initial offering price not to exceed $100,000,000. Securities registered hereunder may be sold separately or together in any combination with other securities registered hereunder. The securities registered hereunder also include such indeterminate number of shares of common stock and preferred stock and amount of debt securities as may be issued upon conversion of or exchange for securities that provide for conversion or exchange, upon exercise of securities or pursuant to the antidilution provisions of any other securities.&lt;br/&gt;&lt;br/&gt;The proposed maximum aggregate offering price per unit will be determined from time to time by the registrant in connection with the issuance by the registrant of the securities registered hereunder and is not specified as to each class of security pursuant to Instructions to the Calculation of Filing Fee Tables and Related Disclosure &#x2014;1.D. of Form F-3 under the Securities Act.&lt;br/&gt;&lt;br/&gt;Estimated solely for purposes of calculating the registration fee pursuant to Rule 457(o) under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;).</ffd:OfferingNote>
</xbrl>
