<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:aactu="http://www.aresacquisitioncorporationii.com/20250728"
  xmlns:dei="http://xbrl.sec.gov/dei/2024"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:us-gaap="http://fasb.org/us-gaap/2024"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="aactu-20250728.xsd" xlink:type="simple"/>
    <context id="duration_2025-07-28_to_2025-07-28">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001853138</identifier>
        </entity>
        <period>
            <startDate>2025-07-28</startDate>
            <endDate>2025-07-28</endDate>
        </period>
    </context>
    <context id="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_aactu-UnitsEachConsistingOfOneClassAOrdinaryShare00001ParValueAndOneHalfOfOneRedeemableWarrantMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001853138</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">aactu:UnitsEachConsistingOfOneClassAOrdinaryShare00001ParValueAndOneHalfOfOneRedeemableWarrantMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-07-28</startDate>
            <endDate>2025-07-28</endDate>
        </period>
    </context>
    <context id="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_us-gaap-CapitalUnitClassAMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001853138</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:CapitalUnitClassAMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-07-28</startDate>
            <endDate>2025-07-28</endDate>
        </period>
    </context>
    <context id="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_aactu-RedeemableWarrantsIncludedAsPartOfTheUnitsEachWholeWarrantExercisableForOneClassAOrdinaryShareAtAnExercisePriceOf1150Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001853138</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">aactu:RedeemableWarrantsIncludedAsPartOfTheUnitsEachWholeWarrantExercisableForOneClassAOrdinaryShareAtAnExercisePriceOf1150Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-07-28</startDate>
            <endDate>2025-07-28</endDate>
        </period>
    </context>
    <dei:EntityRegistrantName
      contextRef="duration_2025-07-28_to_2025-07-28"
      id="Hidden_dei_EntityRegistrantName">Ares Acquisition Corp II</dei:EntityRegistrantName>
    <dei:AmendmentFlag contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-301">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="duration_2025-07-28_to_2025-07-28"
      id="Hidden_dei_EntityCentralIndexKey">0001853138</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-336">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-337">2025-07-28</dei:DocumentPeriodEndDate>
    <dei:EntityIncorporationStateCountryCode contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-338">E9</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-339">001-41691</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-340">98-1592112</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1 contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-341">245 Park Avenue</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2 contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-342">44th Floor</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-343">New York</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-344">NY</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-345">10167</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-346">(310)</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-347">201-4100</dei:LocalPhoneNumber>
    <dei:WrittenCommunications contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-348">true</dei:WrittenCommunications>
    <dei:SolicitingMaterial contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-349">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-350">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-351">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_aactu-UnitsEachConsistingOfOneClassAOrdinaryShare00001ParValueAndOneHalfOfOneRedeemableWarrantMember"
      id="ixv-149">Units, each consisting of one Class&#160;A Ordinary Share, par value $0.0001 per share, and one-half of one redeemable warrant</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_aactu-UnitsEachConsistingOfOneClassAOrdinaryShare00001ParValueAndOneHalfOfOneRedeemableWarrantMember"
      id="ixv-352">AACT.U</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_aactu-UnitsEachConsistingOfOneClassAOrdinaryShare00001ParValueAndOneHalfOfOneRedeemableWarrantMember"
      id="ixv-353">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_us-gaap-CapitalUnitClassAMember"
      id="ixv-354">Class&#160;A Ordinary Shares, par value $0.0001 per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_us-gaap-CapitalUnitClassAMember"
      id="ixv-355">AACT</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_us-gaap-CapitalUnitClassAMember"
      id="ixv-356">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_aactu-RedeemableWarrantsIncludedAsPartOfTheUnitsEachWholeWarrantExercisableForOneClassAOrdinaryShareAtAnExercisePriceOf1150Member"
      id="ixv-357">Redeemable warrants, each whole warrant exercisable for one Class&#160;A Ordinary Share at an exercise price of $11.50</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_aactu-RedeemableWarrantsIncludedAsPartOfTheUnitsEachWholeWarrantExercisableForOneClassAOrdinaryShareAtAnExercisePriceOf1150Member"
      id="ixv-358">AACT WS</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="duration_2025-07-28_to_2025-07-28_us-gaap-StatementClassOfStockAxis_aactu-RedeemableWarrantsIncludedAsPartOfTheUnitsEachWholeWarrantExercisableForOneClassAOrdinaryShareAtAnExercisePriceOf1150Member"
      id="ixv-359">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-360">true</dei:EntityEmergingGrowthCompany>
    <dei:EntityExTransitionPeriod contextRef="duration_2025-07-28_to_2025-07-28" id="ixv-361">false</dei:EntityExTransitionPeriod>
</xbrl>
