<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:country="http://xbrl.sec.gov/country/2024"
  xmlns:dei="http://xbrl.sec.gov/dei/2024"
  xmlns:fmr="http://www.fidelity.com/20250829"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:oef="http://xbrl.sec.gov/oef/2024q3"
  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="fmr-20250829.xsd" xlink:type="simple"/>
    <context id="C000020470_ClassMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-12-31</startDate>
            <endDate>2025-06-30</endDate>
        </period>
    </context>
    <context id="C000020470_InstantMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_MS_InformationTechnologySectorMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">oef:InformationTechnologySectorMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_MS_ConsumerDiscretionarySectorMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">oef:ConsumerDiscretionarySectorMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_MS_IndustrialSectorMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">oef:IndustrialSectorMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_MS_CommunicationsSectorMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">oef:CommunicationsSectorMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_MS_FinancialsSectorMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">fmr:MSFinancialsSectorMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_MS_HealthcareSectorMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">us-gaap:HealthcareSectorMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_MS_RealEstateSectorMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">us-gaap:RealEstateSectorMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_MS_MaterialsSectorMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">oef:MaterialsSectorMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_MS_ConsumerStaplesSectorMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">oef:ConsumerStaplesSectorMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_MS_UtilitiesSectorMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">oef:UtilitiesSectorMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_AA_CommonStocks_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">fmr:AACommonStocksMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_AA_PreferredStocks_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">fmr:AAPreferredStocksMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_AA_ShortTermInvestmentsandNetOtherAssetsLiabilities_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">fmr:AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_GD_US_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">country:US</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_GD_CA_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">country:CA</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_GD_FR_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">country:FR</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_GD_GB_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">country:GB</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_GD_IT_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">country:IT</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_GD_FI_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">country:FI</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_GD_KR_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">country:KR</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_GD_DE_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">country:DE</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_GD_CH_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">country:CH</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_GD_Other_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">fmr:OtherMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_TH_0_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:LargestHoldingAxis">fmr:TH0Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_TH_1_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:LargestHoldingAxis">fmr:TH1Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_TH_2_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:LargestHoldingAxis">fmr:TH2Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_TH_3_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:LargestHoldingAxis">fmr:TH3Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_TH_4_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:LargestHoldingAxis">fmr:TH4Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_TH_5_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:LargestHoldingAxis">fmr:TH5Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_TH_6_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:LargestHoldingAxis">fmr:TH6Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_TH_7_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:LargestHoldingAxis">fmr:TH7Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_TH_8_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:LargestHoldingAxis">fmr:TH8Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="C000020470_TH_9_Member">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">fmr:C000020470Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:LargestHoldingAxis">fmr:TH9Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-06-30</instant>
        </period>
    </context>
    <context id="Trust">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000035402</identifier>
        </entity>
        <period>
            <startDate>2024-12-31</startDate>
            <endDate>2025-06-30</endDate>
        </period>
    </context>
    <unit id="usd">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <unit id="holding">
        <measure>shares</measure>
    </unit>
    <dei:DocumentType contextRef="Trust" id="ixv-8399">N-CSRS</dei:DocumentType>
    <dei:AmendmentFlag contextRef="Trust" id="ixv-8400">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey contextRef="Trust" id="ixv-8401">0000035402</dei:EntityCentralIndexKey>
    <dei:EntityInvCompanyType contextRef="Trust" id="ixv-8402">N-1A</dei:EntityInvCompanyType>
    <dei:EntityRegistrantName contextRef="Trust" id="ixv-8403">Fidelity Trend Fund</dei:EntityRegistrantName>
    <dei:DocumentPeriodEndDate contextRef="Trust" id="ixv-98">2025-06-30</dei:DocumentPeriodEndDate>
    <oef:FundName contextRef="C000020470_ClassMember" id="ixv-110">Fidelity&#xae; Trend Fund</oef:FundName>
    <oef:ClassName contextRef="C000020470_ClassMember" id="ixv-113">Fidelity&#xae; Trend Fund</oef:ClassName>
    <dei:TradingSymbol contextRef="C000020470_ClassMember" id="ixv-117">FTRNX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock contextRef="C000020470_ClassMember" id="ixv-136">This semi-annual shareholder report contains information about Fidelity&#xae; Trend Fund for the period January 1, 2025 to June 30, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual contextRef="C000020470_ClassMember" id="ixv-138">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock contextRef="C000020470_ClassMember" id="ixv-143">You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544 or by sending an e-mail to fidfunddocuments@fidelity.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite contextRef="C000020470_ClassMember" id="ixv-145">fundresearch.fidelity.com/prospectus/sec</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber contextRef="C000020470_ClassMember" id="ixv-148">1-800-544-8544</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail contextRef="C000020470_ClassMember" id="ixv-151">fidfunddocuments@fidelity.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock contextRef="C000020470_ClassMember" id="ixv-158">&lt;span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;"&gt;What were your Fund costs for the last six months?&lt;/span&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;(based on hypothetical $10,000 investment)&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"&gt;&lt;tr&gt;&lt;td style="width:45%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:24%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;Costs of a $10,000 investment&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:30%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;Costs paid as a percentage of a $10,000 investment &lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:1%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:45%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fidelity&#xae; Trend Fund&lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:24%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;$ &lt;/span&gt;36&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:30%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;0.71&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;%&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:1%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="C000020470_ClassMember"
      decimals="0"
      id="ixv-8698"
      unitRef="usd">36</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="C000020470_ClassMember"
      decimals="INF"
      id="ixv-8699"
      unitRef="pure">0.0071</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock contextRef="C000020470_ClassMember" id="ixv-198">&lt;span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;"&gt;Key Fund Statistics&lt;/span&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;(as of June 30, 2025)&lt;/span&gt;&lt;/div&gt;
&lt;div&gt;&lt;span style="font-size:11px;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"&gt;&lt;tr&gt;&lt;td style="width:63%; " valign="top"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;"&gt;KEY FACTS&lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fund Size&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;$&lt;/span&gt;4,116,328,546&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Number of Holdings&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;117&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Portfolio Turnover&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;67&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;%&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="C000020470_InstantMember"
      decimals="0"
      id="ixv-8700"
      unitRef="usd">4116328546</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="C000020470_InstantMember"
      decimals="INF"
      id="ixv-8701"
      unitRef="holding">117</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="C000020470_ClassMember"
      decimals="INF"
      id="ixv-8702"
      unitRef="pure">0.67</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock contextRef="C000020470_ClassMember" id="ixv-258">
&#160;
&#160;
&#160;
MARKET SECTORS
(% of Fund's net assets)

&#160;

&#160;


Information Technology

40.3

&#160;


Consumer Discretionary

19.0

&#160;


Industrials

17.3

&#160;


Communication Services

11.7

&#160;


Financials

5.2

&#160;


Health Care

3.5

&#160;


Real Estate

1.2

&#160;


Materials

0.8

&#160;


Consumer Staples

0.6

&#160;


Utilities

0.2

&#160;


&#160;




Common Stocks

99.7


Preferred Stocks

0.1


Short-Term Investments and Net Other Assets (Liabilities)

0.2




ASSET ALLOCATION (% of Fund's net assets)


&#160;



&#160;

Common Stocks - 99.7&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Preferred Stocks - 0.1&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Short-Term Investments and Net Other Assets (Liabilities) - 0.2


&#160;






United States

97.1


Canada

0.7


France

0.4


United Kingdom

0.4


Italy

0.4


Finland

0.3


Korea (South)

0.2


Germany

0.2


Switzerland

0.2


Others

0.1




GEOGRAPHIC DIVERSIFICATION (% of Fund's net assets)


&#160;



&#160;

United States - 97.1&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Canada - 0.7&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

France - 0.4&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

United Kingdom - 0.4&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Italy - 0.4&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Finland - 0.3&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Korea (South) - 0.2&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Germany - 0.2&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Switzerland - 0.2&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Others - 0.1&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;




&#160;




&#160;
&#160;
</oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="C000020470_MS_InformationTechnologySectorMember"
      decimals="INF"
      id="ixv-8703"
      unitRef="pure">0.403</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_MS_ConsumerDiscretionarySectorMember"
      decimals="INF"
      id="ixv-8704"
      unitRef="pure">0.190</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_MS_IndustrialSectorMember"
      decimals="INF"
      id="ixv-8705"
      unitRef="pure">0.173</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_MS_CommunicationsSectorMember"
      decimals="INF"
      id="ixv-8706"
      unitRef="pure">0.117</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_MS_FinancialsSectorMember"
      decimals="INF"
      id="ixv-8707"
      unitRef="pure">0.052</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_MS_HealthcareSectorMember"
      decimals="INF"
      id="ixv-8708"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_MS_RealEstateSectorMember"
      decimals="INF"
      id="ixv-8709"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_MS_MaterialsSectorMember"
      decimals="INF"
      id="ixv-8710"
      unitRef="pure">0.008</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_MS_ConsumerStaplesSectorMember"
      decimals="INF"
      id="ixv-8711"
      unitRef="pure">0.006</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_MS_UtilitiesSectorMember"
      decimals="INF"
      id="ixv-8712"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_AA_CommonStocks_Member"
      decimals="INF"
      id="ixv-8713"
      unitRef="pure">0.997</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_AA_PreferredStocks_Member"
      decimals="INF"
      id="ixv-8714"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_AA_ShortTermInvestmentsandNetOtherAssetsLiabilities_Member"
      decimals="INF"
      id="ixv-8715"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_GD_US_Member"
      decimals="INF"
      id="ixv-8716"
      unitRef="pure">0.971</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_GD_CA_Member"
      decimals="INF"
      id="ixv-8717"
      unitRef="pure">0.007</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_GD_FR_Member"
      decimals="INF"
      id="ixv-8718"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_GD_GB_Member"
      decimals="INF"
      id="ixv-8719"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_GD_IT_Member"
      decimals="INF"
      id="ixv-8720"
      unitRef="pure">0.004</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_GD_FI_Member"
      decimals="INF"
      id="ixv-8721"
      unitRef="pure">0.003</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_GD_KR_Member"
      decimals="INF"
      id="ixv-8722"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_GD_DE_Member"
      decimals="INF"
      id="ixv-8723"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_GD_CH_Member"
      decimals="INF"
      id="ixv-8724"
      unitRef="pure">0.002</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_GD_Other_Member"
      decimals="INF"
      id="ixv-8725"
      unitRef="pure">0.001</oef:PctOfNav>
    <oef:LargestHoldingsTableTextBlock contextRef="C000020470_ClassMember" id="ixv-601">TOP HOLDINGS
(% of Fund's net assets)

&#160;

&#160;


NVIDIA Corp

13.2


&#160;


Microsoft Corp

7.6


&#160;


Apple Inc

6.0


&#160;


Amazon.com Inc

5.8


&#160;


Meta Platforms Inc Class A

4.7


&#160;


Broadcom Inc

4.4


&#160;


Axon Enterprise Inc

3.4


&#160;


Netflix Inc

2.7


&#160;


Tesla Inc

2.5


&#160;


Alphabet Inc Class A

2.5


&#160;


&#160;

52.8

&#160;



</oef:LargestHoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="C000020470_TH_0_Member"
      decimals="INF"
      id="ixv-8726"
      unitRef="pure">0.132</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_TH_1_Member"
      decimals="INF"
      id="ixv-8727"
      unitRef="pure">0.076</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_TH_2_Member"
      decimals="INF"
      id="ixv-8728"
      unitRef="pure">0.060</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_TH_3_Member"
      decimals="INF"
      id="ixv-8729"
      unitRef="pure">0.058</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_TH_4_Member"
      decimals="INF"
      id="ixv-8730"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_TH_5_Member"
      decimals="INF"
      id="ixv-8731"
      unitRef="pure">0.044</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_TH_6_Member"
      decimals="INF"
      id="ixv-8732"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_TH_7_Member"
      decimals="INF"
      id="ixv-8733"
      unitRef="pure">0.027</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_TH_8_Member"
      decimals="INF"
      id="ixv-8734"
      unitRef="pure">0.025</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000020470_TH_9_Member"
      decimals="INF"
      id="ixv-8735"
      unitRef="pure">0.025</oef:PctOfNav>
</xbrl>
