<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:tlacw="http://imetrix.edgar-online.com/20260902"
  xmlns:us-gaap="http://fasb.org/us-gaap/2025"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="tlacw-20260902.xsd" xlink:type="simple"/>
    <context id="duration_2026-09-02_to_2026-09-02">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002128462</identifier>
        </entity>
        <period>
            <startDate>2026-09-02</startDate>
            <endDate>2026-09-02</endDate>
        </period>
    </context>
    <context id="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_tlacw-UnitsEachConsistingOfOneOrdinaryShareParValue0.0001PerShareAndOneHalfOfOneWarrantMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002128462</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">tlacw:UnitsEachConsistingOfOneOrdinaryShareParValue0.0001PerShareAndOneHalfOfOneWarrantMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-02</startDate>
            <endDate>2026-09-02</endDate>
        </period>
    </context>
    <context id="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_us-gaap-FairValueMeasuredAtNetAssetValuePerShareMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002128462</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:FairValueMeasuredAtNetAssetValuePerShareMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-02</startDate>
            <endDate>2026-09-02</endDate>
        </period>
    </context>
    <context id="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_tlacw-WarrantsEachWholeWarrantExercisableForOneOrdinaryShareAtAnExercisePriceOf11.50Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002128462</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">tlacw:WarrantsEachWholeWarrantExercisableForOneOrdinaryShareAtAnExercisePriceOf11.50Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-02</startDate>
            <endDate>2026-09-02</endDate>
        </period>
    </context>
    <dei:EntityTaxIdentificationNumber
      contextRef="duration_2026-09-02_to_2026-09-02"
      id="Hidden_dei_EntityTaxIdentificationNumber">00-0000000</dei:EntityTaxIdentificationNumber>
    <dei:AmendmentFlag contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-267">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="duration_2026-09-02_to_2026-09-02"
      id="Hidden_dei_EntityCentralIndexKey">0002128462</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-302">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-303">2026-09-02</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-304">THREE LIONS ACQUISITION CORP.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-305">E9</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-306">001-43469</dei:EntityFileNumber>
    <dei:EntityAddressAddressLine1 contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-307">888 Prospect Street</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-308">La Jolla</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-309">CA</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-310">92037</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-311">917</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-312">822-8328</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-313">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-314">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-315">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-316">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_tlacw-UnitsEachConsistingOfOneOrdinaryShareParValue0.0001PerShareAndOneHalfOfOneWarrantMember"
      id="ixv-129">Units, each consisting of one ordinary share, par value $0.0001 per share, and one-half of one warrant</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_tlacw-UnitsEachConsistingOfOneOrdinaryShareParValue0.0001PerShareAndOneHalfOfOneWarrantMember"
      id="ixv-317">TLACU</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_tlacw-UnitsEachConsistingOfOneOrdinaryShareParValue0.0001PerShareAndOneHalfOfOneWarrantMember"
      id="ixv-318">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_us-gaap-FairValueMeasuredAtNetAssetValuePerShareMember"
      id="ixv-319">Ordinary shares, par value $0.0001 per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_us-gaap-FairValueMeasuredAtNetAssetValuePerShareMember"
      id="ixv-320">TLAC</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_us-gaap-FairValueMeasuredAtNetAssetValuePerShareMember"
      id="ixv-321">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_tlacw-WarrantsEachWholeWarrantExercisableForOneOrdinaryShareAtAnExercisePriceOf11.50Member"
      id="ixv-322">Warrants, each whole warrant exercisable for one ordinary share at an exercise price of $11.50</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_tlacw-WarrantsEachWholeWarrantExercisableForOneOrdinaryShareAtAnExercisePriceOf11.50Member"
      id="ixv-323">TLACW</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2026-09-02_to_2026-09-02_us-gaap-StatementClassOfStockAxis_tlacw-WarrantsEachWholeWarrantExercisableForOneOrdinaryShareAtAnExercisePriceOf11.50Member"
      id="ixv-324">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-325">true</dei:EntityEmergingGrowthCompany>
    <dei:EntityExTransitionPeriod contextRef="duration_2026-09-02_to_2026-09-02" id="ixv-326">false</dei:EntityExTransitionPeriod>
</xbrl>
