<?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">0002004024</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
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        <period>
            <startDate>2026-09-02</startDate>
            <endDate>2026-09-02</endDate>
        </period>
    </context>
    <context id="c_offering_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002004024</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>2</dei:lineNo>
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        <period>
            <startDate>2026-09-02</startDate>
            <endDate>2026-09-02</endDate>
        </period>
    </context>
    <context id="c_offering_3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002004024</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>3</dei:lineNo>
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        <period>
            <startDate>2026-09-02</startDate>
            <endDate>2026-09-02</endDate>
        </period>
    </context>
    <context id="c_offering_4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002004024</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>4</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-02</startDate>
            <endDate>2026-09-02</endDate>
        </period>
    </context>
    <context id="c_report">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002004024</identifier>
        </entity>
        <period>
            <startDate>2026-09-02</startDate>
            <endDate>2026-09-02</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-1MEF</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="c_report" id="fee_002">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="c_report" id="fee_003">0002004024</dei:EntityCentralIndexKey>
    <ffd:RegnFileNb contextRef="c_report" id="fee_004">333-298425</ffd:RegnFileNb>
    <ffd:OfferingTableNa contextRef="c_report" id="fee_005" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="c_report" id="fee_006">N/A</ffd:OffsetTableNa>
    <ffd:CombinedProspectusTableNa contextRef="c_report" id="fee_007">N/A</ffd:CombinedProspectusTableNa>
    <ffd:FormTp contextRef="c_report" id="fee_008">F-1</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="c_report" id="fee_009">Lianhe Sowell International Group Ltd</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="c_offering_1" id="fee_010">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_1" id="fee_011">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_1" id="fee_012">Units, each consisting of: (i) One Class A ordinary share, par value $0.0016 per share and (ii) three warrants</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="c_offering_1" id="fee_013">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_014"
      unitRef="USD">11000000.16</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_015"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_016"
      unitRef="USD">1519.10</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_2" id="fee_017">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_2" id="fee_018">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_2" id="fee_019">Class A ordinary shares included as part of the units</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="c_offering_2" id="fee_020">true</ffd:FeesOthrRuleFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_021"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_022"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_023"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_3" id="fee_024">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_3" id="fee_025">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_3" id="fee_026">Warrants included as part of the units</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="c_offering_3" id="fee_027">true</ffd:FeesOthrRuleFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_3"
      decimals="INF"
      id="fee_028"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="c_offering_3"
      decimals="INF"
      id="fee_029"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_3"
      decimals="INF"
      id="fee_030"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_4" id="fee_031">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_4" id="fee_032">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_4" id="fee_033">Class A ordinary shares underlying the redeemable warrants included as part of the units</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="c_offering_4" id="fee_034">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_4"
      decimals="INF"
      id="fee_035"
      unitRef="USD">38041667.22</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="c_offering_4"
      decimals="INF"
      id="fee_036"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_4"
      decimals="INF"
      id="fee_037"
      unitRef="USD">5253.55</ffd:FeeAmt>
    <ffd:TtlOfferingAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_038"
      unitRef="USD">49041667.38</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_039"
      unitRef="USD">6772.65</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_040"
      unitRef="USD">5938.30</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_041"
      unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_042"
      unitRef="USD">834.35</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c_offering_1" id="fee_043">The Registrant previously registered units with a proposed maximum aggregate offering price not to exceed $10,000,000 on a Registration Statement on Form F-1, as amended (File No. 333-298425), which was declared effective by the Securities and Exchange Commission on August 31, 2026. In accordance with Rule 462(b) promulgated under the Securities Act of 1933, as amended, an additional amount of Class A ordinary shares having a proposed maximum aggregate offering price of $1,000,000.16 is hereby registered. Pursuant to Rule 416 under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;), the Class A ordinary shares, par value $0.0016 per share (the &#x201c;Class A Ordinary Shares&#x201d;), of Lianhe Sowell International Group Ltd (the &#x201c;Company&#x201d;) registered hereby also include an indeterminate number of additional Class A Ordinary Shares as may from time to time become issuable by reason of share splits, share dividends, recapitalizations or other similar transactions. Estimated solely for the purpose of determining the amount of the registration fee in accordance with Rule 457(o) under the Securities Act.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_2" id="fee_044">The Registrant previously registered units with a proposed maximum aggregate offering price not to exceed $10,000,000 on a Registration Statement on Form F-1, as amended (File No. 333-298425), which was declared effective by the Securities and Exchange Commission on August 31, 2026. In accordance with Rule 462(b) promulgated under the Securities Act of 1933, as amended, an additional amount of Class A ordinary shares having a proposed maximum aggregate offering price of $1,000,000.16 is hereby registered. Pursuant to Rule 416 under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;), the Class A ordinary shares, par value $0.0016 per share (the &#x201c;Class A Ordinary Shares&#x201d;), of Lianhe Sowell International Group Ltd (the &#x201c;Company&#x201d;) registered hereby also include an indeterminate number of additional Class A Ordinary Shares as may from time to time become issuable by reason of share splits, share dividends, recapitalizations or other similar transactions. Estimated solely for the purpose of determining the amount of the registration fee in accordance with Rule 457(o) under the Securities Act.&lt;br/&gt;&lt;br/&gt;No separate fee is required pursuant to Rule 457(i) under the Securities Act.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_3" id="fee_045">The Registrant previously registered units with a proposed maximum aggregate offering price not to exceed $10,000,000 on a Registration Statement on Form F-1, as amended (File No. 333-298425), which was declared effective by the Securities and Exchange Commission on August 31, 2026. In accordance with Rule 462(b) promulgated under the Securities Act of 1933, as amended, an additional amount of Class A ordinary shares having a proposed maximum aggregate offering price of $1,000,000.16 is hereby registered. Pursuant to Rule 416 under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;), the Class A ordinary shares, par value $0.0016 per share (the &#x201c;Class A Ordinary Shares&#x201d;), of Lianhe Sowell International Group Ltd (the &#x201c;Company&#x201d;) registered hereby also include an indeterminate number of additional Class A Ordinary Shares as may from time to time become issuable by reason of share splits, share dividends, recapitalizations or other similar transactions. Estimated solely for the purpose of determining the amount of the registration fee in accordance with Rule 457(o) under the Securities Act.&lt;br/&gt;&lt;br/&gt;No separate fee is required pursuant to Rule 457(i) under the Securities Act.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_4" id="fee_046">The Registrant previously registered units with a proposed maximum aggregate offering price not to exceed $10,000,000 on a Registration Statement on Form F-1, as amended (File No. 333-298425), which was declared effective by the Securities and Exchange Commission on August 31, 2026. In accordance with Rule 462(b) promulgated under the Securities Act of 1933, as amended, an additional amount of Class A ordinary shares having a proposed maximum aggregate offering price of $1,000,000.16 is hereby registered. Pursuant to Rule 416 under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;), the Class A ordinary shares, par value $0.0016 per share (the &#x201c;Class A Ordinary Shares&#x201d;), of Lianhe Sowell International Group Ltd (the &#x201c;Company&#x201d;) registered hereby also include an indeterminate number of additional Class A Ordinary Shares as may from time to time become issuable by reason of share splits, share dividends, recapitalizations or other similar transactions. Estimated solely for the purpose of determining the amount of the registration fee in accordance with Rule 457(o) under the Securities Act.&lt;br/&gt;&lt;br/&gt;There will be three warrants included in each unit, with each warrant entitled to purchase one Class A Ordinary Share. In accordance with Rule 462(b) promulgated under the Securities Act of 1933, as amended, an additional amount of Class A ordinary shares underlying the warrants included in the units having a proposed maximum aggregate offering price of $5,041,667.22 is hereby registered. Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the &#x201c;Securities Act&#x201d;), there are also being registered an indeterminable number of additional securities as may be offered or issued to prevent dilution resulting from share subdivisions, stock dividends, or similar transactions. Estimated solely for the purpose of calculating the amount of the registration fee pursuant to Rule 457(o) under the Securities Act.</ffd:OfferingNote>
</xbrl>
