<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:crml="http://www.example.com/20250630"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ifrs-full="https://xbrl.ifrs.org/taxonomy/2025-03-27/ifrs-full"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="crml-20250630.xsd" xlink:type="simple"/>
    <context id="c0">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001951089</identifier>
        </entity>
        <period>
            <startDate>2024-07-01</startDate>
            <endDate>2025-06-30</endDate>
        </period>
    </context>
    <context id="c1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001951089</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:EntityAddressesAddressTypeAxis">dei:BusinessContactMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-07-01</startDate>
            <endDate>2025-06-30</endDate>
        </period>
    </context>
    <context id="c2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001951089</identifier>
            <segment>
                <xbrldi:explicitMember dimension="ifrs-full:ClassesOfShareCapitalAxis">crml:OrdinarySharesParValue0001PerShareMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-07-01</startDate>
            <endDate>2025-06-30</endDate>
        </period>
    </context>
    <context id="c3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001951089</identifier>
            <segment>
                <xbrldi:explicitMember dimension="ifrs-full:ClassesOfShareCapitalAxis">crml:WarrantsEachExercisableToPurchaseOneOrdinaryShareAtAnExercisePriceOf1150PerShareMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-07-01</startDate>
            <endDate>2025-06-30</endDate>
        </period>
    </context>
    <context id="c4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001951089</identifier>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <unit id="shares">
        <measure>shares</measure>
    </unit>
    <dei:DocumentType contextRef="c0" id="ixv-2946">20-F/A</dei:DocumentType>
    <dei:DocumentRegistrationStatement contextRef="c0" id="ixv-2947">false</dei:DocumentRegistrationStatement>
    <dei:DocumentAnnualReport contextRef="c0" id="ixv-2948">true</dei:DocumentAnnualReport>
    <dei:DocumentPeriodEndDate contextRef="c0" id="ixv-2949">2025-06-30</dei:DocumentPeriodEndDate>
    <dei:CurrentFiscalYearEndDate contextRef="c0" id="ixv-2950">--06-30</dei:CurrentFiscalYearEndDate>
    <dei:DocumentFiscalYearFocus contextRef="c0" id="ixv-2951">2025</dei:DocumentFiscalYearFocus>
    <dei:DocumentTransitionReport contextRef="c0" id="ixv-2952">false</dei:DocumentTransitionReport>
    <dei:DocumentShellCompanyReport contextRef="c0" id="ixv-2953">false</dei:DocumentShellCompanyReport>
    <dei:EntityFileNumber contextRef="c0" id="ixv-2954">001-41973</dei:EntityFileNumber>
    <dei:EntityRegistrantName contextRef="c0" id="ixv-85">Critical Metals Corp.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="c0" id="ixv-100">D8</dei:EntityIncorporationStateCountryCode>
    <dei:EntityAddressAddressLine1 contextRef="c0" id="ixv-2955">Kingston Chambers</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2 contextRef="c0" id="ixv-2956">PO Box 173</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown contextRef="c0" id="ixv-2957">Road TownTortola</dei:EntityAddressCityOrTown>
    <dei:EntityAddressCountry contextRef="c0" id="ixv-2959">VG</dei:EntityAddressCountry>
    <dei:ContactPersonnelName contextRef="c1" id="ixv-138">Corporation Service Company</dei:ContactPersonnelName>
    <dei:EntityAddressAddressLine1 contextRef="c1" id="ixv-142">251 Little Falls Drive</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown contextRef="c1" id="ixv-2960">Wilmington</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="c1" id="ixv-2961">DE</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode contextRef="c1" id="ixv-2962">19808</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode contextRef="c1" id="ixv-2963">(302)</dei:CityAreaCode>
    <dei:LocalPhoneNumber contextRef="c1" id="ixv-2964">636-5400</dei:LocalPhoneNumber>
    <dei:Security12bTitle contextRef="c2" id="ixv-176">Ordinary shares, par value $0.001 per share</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="c2" id="ixv-181">CRML</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="c2" id="ixv-2965">NASDAQ</dei:SecurityExchangeName>
    <dei:Security12bTitle contextRef="c3" id="ixv-190">Warrants, each exercisable to purchase one ordinary share at an exercise price of $11.50 per share</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="c3" id="ixv-195">CRMLW</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="c3" id="ixv-2966">NASDAQ</dei:SecurityExchangeName>
    <dei:EntityCommonStockSharesOutstanding
      contextRef="c4"
      decimals="INF"
      id="ixv-2967"
      unitRef="shares">104912853</dei:EntityCommonStockSharesOutstanding>
    <dei:EntityWellKnownSeasonedIssuer contextRef="c0" id="ixv-2968">No</dei:EntityWellKnownSeasonedIssuer>
    <dei:EntityVoluntaryFilers contextRef="c0" id="ixv-2969">No</dei:EntityVoluntaryFilers>
    <dei:EntityCurrentReportingStatus contextRef="c0" id="ixv-2970">Yes</dei:EntityCurrentReportingStatus>
    <dei:EntityInteractiveDataCurrent contextRef="c0" id="ixv-2971">Yes</dei:EntityInteractiveDataCurrent>
    <dei:EntityFilerCategory contextRef="c0" id="ixv-265">Accelerated Filer</dei:EntityFilerCategory>
    <dei:EntityEmergingGrowthCompany contextRef="c0" id="ixv-281">true</dei:EntityEmergingGrowthCompany>
    <dei:EntityExTransitionPeriod contextRef="c0" id="ixv-2972">false</dei:EntityExTransitionPeriod>
    <dei:IcfrAuditorAttestationFlag contextRef="c0" id="ixv-2973">false</dei:IcfrAuditorAttestationFlag>
    <dei:DocumentFinStmtErrorCorrectionFlag contextRef="c0" id="ixv-2974">true</dei:DocumentFinStmtErrorCorrectionFlag>
    <dei:DocumentFinStmtRestatementRecoveryAnalysisFlag contextRef="c0" id="ixv-2975">true</dei:DocumentFinStmtRestatementRecoveryAnalysisFlag>
    <dei:DocumentAccountingStandard contextRef="c0" id="ixv-2976">International Financial Reporting Standards</dei:DocumentAccountingStandard>
    <dei:EntityShellCompany contextRef="c0" id="ixv-2977">false</dei:EntityShellCompany>
    <dei:AmendmentDescription contextRef="c0" id="ixv-359">This Amendment No. 2 on Form 20-F/A (the &#x201c;Amendment&#x201d;)
is being filed by Critical Metals Corp. (the &#x201c;Company&#x201d;) to amend the Company&#x2019;s Annual Report on Form 20-F for
the fiscal year ended June 30, 2025, originally filed on October 6, 2025, as amended by Amendment No. 1 to the Annual Report on Form 20-F,
filed with the SEC on October 15, 2025 (as amended, the &#x201c;Original Filing&#x201d;).This Amendment is being filed to (i) amend and
restate the certain disclosures related to the Tanbreez Rare Earth Project (&#x201c;Tanbreez&#x201d;) in the sections titled &#x201c;Business
&#x2013; Overview,&#x201d; &#x201c;Business &#x2013; History and Development of the Tanbreez Project,&#x201d; and &#x201c;Description of the
Tanbreez Project,&#x201d; which are included in Item 4.B of the Original Filing, (ii) add a new subsection to the Business section titled
&#x201c;Business &#x2013; Internal Controls and Procedures Related to Exploration and Mineral Resource Estimates,&#x201d; as part of Item
4.B, and (iii) file the revised technical report summary related to the Tanbreez Rare Earth Project as Exhibit 16.1 to this Amendment
(which report will replace the prior technical report summary related to the Tanbreez Rare Earth Project that was included as Exhibit
16.2 in the Original Filing). The amended disclosures described in clauses (i) and (ii) above are provided below. The updated technical
report summary described in clause (iii) above and filed with this Amendment does not reduce or expand the  previously
announced mineral resources related to the Tanbreez Project.This Amendment does not affect any other parts
of, or exhibits to, the Original Filing, nor does it reflect events occurring after the date of the Original Filing. Accordingly, this
Amendment should be read in conjunction with the Original Filing and with our filings with the U.S. Securities Exchange Commission subsequent
to the Original Filing.</dei:AmendmentDescription>
    <dei:EntityCentralIndexKey contextRef="c0" id="ixv-2980">0001951089</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag contextRef="c0" id="ixv-2981">true</dei:AmendmentFlag>
    <dei:DocumentFiscalPeriodFocus contextRef="c0" id="ixv-2982">FY</dei:DocumentFiscalPeriodFocus>
    <dei:EntityAddressPostalZipCode contextRef="c0" id="ixv-2983">00000</dei:EntityAddressPostalZipCode>
</xbrl>
