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    <oef:RiskReturnHeading contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-174">Fund Summary
Fund/Class:
Fidelity&#xae; Blue Chip Growth Fund/Fidelity Advisor&#xae; Blue Chip Growth Fund A, M, C, I, Z&#160;
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    <oef:ObjectivePrimaryTextBlock contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-191">Fidelity&#xae; Blue Chip Growth Fund seeks growth of capital over the long term.</oef:ObjectivePrimaryTextBlock>
    <oef:ExpenseHeading contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-194">Fee Table</oef:ExpenseHeading>
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The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or certain other Fidelity&#xae; funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 32 of the prospectus and in the sales charge waiver appendix to the prospectus.
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    <oef:ExpenseBreakpointDiscounts contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-201">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or certain other Fidelity&#xae; funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 32 of the prospectus</oef:ExpenseBreakpointDiscounts>
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    <oef:ExpensesDeferredChargesTextBlock contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-315">Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% and 0.25%, respectively.</oef:ExpensesDeferredChargesTextBlock>
    <oef:ExpensesDeferredChargesTextBlock contextRef="Pid_S000007195_Cid_C000254554" id="ixv-323">On Class C shares redeemed less than one year after purchase.</oef:ExpensesDeferredChargesTextBlock>
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      contextRef="Pid_S000007195_Cid_C000254555"
      decimals="6"
      id="ixv-11232"
      unitRef="pure">0.0121</oef:ExpensesOverAssets>
    <oef:ExpensesOverAssets
      contextRef="Pid_S000007195_Cid_C000254554"
      decimals="6"
      id="ixv-11233"
      unitRef="pure">0.0172</oef:ExpensesOverAssets>
    <oef:ExpensesOverAssets
      contextRef="Pid_S000007195_Cid_C000254556"
      decimals="6"
      id="ixv-11234"
      unitRef="pure">0.0072</oef:ExpensesOverAssets>
    <oef:ExpensesOverAssets
      contextRef="Pid_S000007195_Cid_C000254557"
      decimals="6"
      id="ixv-11235"
      unitRef="pure">0.0061</oef:ExpensesOverAssets>
    <oef:ExpenseExampleNarrativeTextBlock contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-499">This example helps compare the cost of investing in the fund with the cost of investing in other funds.
Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:</oef:ExpenseExampleNarrativeTextBlock>
    <oef:ExpenseExampleYear01
      contextRef="Pid_S000007195_Cid_C000254558"
      decimals="0"
      id="ixv-11236"
      unitRef="usd">668</oef:ExpenseExampleYear01>
    <oef:ExpenseExampleNoRedemptionYear01
      contextRef="Pid_S000007195_Cid_C000254558"
      decimals="0"
      id="ixv-11237"
      unitRef="usd">668</oef:ExpenseExampleNoRedemptionYear01>
    <oef:ExpenseExampleYear01
      contextRef="Pid_S000007195_Cid_C000254555"
      decimals="0"
      id="ixv-11238"
      unitRef="usd">469</oef:ExpenseExampleYear01>
    <oef:ExpenseExampleNoRedemptionYear01
      contextRef="Pid_S000007195_Cid_C000254555"
      decimals="0"
      id="ixv-11239"
      unitRef="usd">469</oef:ExpenseExampleNoRedemptionYear01>
    <oef:ExpenseExampleYear01
      contextRef="Pid_S000007195_Cid_C000254554"
      decimals="0"
      id="ixv-11240"
      unitRef="usd">275</oef:ExpenseExampleYear01>
    <oef:ExpenseExampleNoRedemptionYear01
      contextRef="Pid_S000007195_Cid_C000254554"
      decimals="0"
      id="ixv-11241"
      unitRef="usd">175</oef:ExpenseExampleNoRedemptionYear01>
    <oef:ExpenseExampleYear01
      contextRef="Pid_S000007195_Cid_C000254556"
      decimals="0"
      id="ixv-11242"
      unitRef="usd">74</oef:ExpenseExampleYear01>
    <oef:ExpenseExampleNoRedemptionYear01
      contextRef="Pid_S000007195_Cid_C000254556"
      decimals="0"
      id="ixv-11243"
      unitRef="usd">74</oef:ExpenseExampleNoRedemptionYear01>
    <oef:ExpenseExampleYear01
      contextRef="Pid_S000007195_Cid_C000254557"
      decimals="0"
      id="ixv-11244"
      unitRef="usd">62</oef:ExpenseExampleYear01>
    <oef:ExpenseExampleNoRedemptionYear01
      contextRef="Pid_S000007195_Cid_C000254557"
      decimals="0"
      id="ixv-11245"
      unitRef="usd">62</oef:ExpenseExampleNoRedemptionYear01>
    <oef:ExpenseExampleYear03
      contextRef="Pid_S000007195_Cid_C000254558"
      decimals="0"
      id="ixv-11246"
      unitRef="usd">866</oef:ExpenseExampleYear03>
    <oef:ExpenseExampleNoRedemptionYear03
      contextRef="Pid_S000007195_Cid_C000254558"
      decimals="0"
      id="ixv-11247"
      unitRef="usd">866</oef:ExpenseExampleNoRedemptionYear03>
    <oef:ExpenseExampleYear03
      contextRef="Pid_S000007195_Cid_C000254555"
      decimals="0"
      id="ixv-11248"
      unitRef="usd">721</oef:ExpenseExampleYear03>
    <oef:ExpenseExampleNoRedemptionYear03
      contextRef="Pid_S000007195_Cid_C000254555"
      decimals="0"
      id="ixv-11249"
      unitRef="usd">721</oef:ExpenseExampleNoRedemptionYear03>
    <oef:ExpenseExampleYear03
      contextRef="Pid_S000007195_Cid_C000254554"
      decimals="0"
      id="ixv-11250"
      unitRef="usd">542</oef:ExpenseExampleYear03>
    <oef:ExpenseExampleNoRedemptionYear03
      contextRef="Pid_S000007195_Cid_C000254554"
      decimals="0"
      id="ixv-11251"
      unitRef="usd">542</oef:ExpenseExampleNoRedemptionYear03>
    <oef:ExpenseExampleYear03
      contextRef="Pid_S000007195_Cid_C000254556"
      decimals="0"
      id="ixv-11252"
      unitRef="usd">230</oef:ExpenseExampleYear03>
    <oef:ExpenseExampleNoRedemptionYear03
      contextRef="Pid_S000007195_Cid_C000254556"
      decimals="0"
      id="ixv-11253"
      unitRef="usd">230</oef:ExpenseExampleNoRedemptionYear03>
    <oef:ExpenseExampleYear03
      contextRef="Pid_S000007195_Cid_C000254557"
      decimals="0"
      id="ixv-11254"
      unitRef="usd">195</oef:ExpenseExampleYear03>
    <oef:ExpenseExampleNoRedemptionYear03
      contextRef="Pid_S000007195_Cid_C000254557"
      decimals="0"
      id="ixv-11255"
      unitRef="usd">195</oef:ExpenseExampleNoRedemptionYear03>
    <oef:ExpenseExampleYear05
      contextRef="Pid_S000007195_Cid_C000254558"
      decimals="0"
      id="ixv-11256"
      unitRef="usd">1080</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleNoRedemptionYear05
      contextRef="Pid_S000007195_Cid_C000254558"
      decimals="0"
      id="ixv-11257"
      unitRef="usd">1080</oef:ExpenseExampleNoRedemptionYear05>
    <oef:ExpenseExampleYear05
      contextRef="Pid_S000007195_Cid_C000254555"
      decimals="0"
      id="ixv-11258"
      unitRef="usd">992</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleNoRedemptionYear05
      contextRef="Pid_S000007195_Cid_C000254555"
      decimals="0"
      id="ixv-11259"
      unitRef="usd">992</oef:ExpenseExampleNoRedemptionYear05>
    <oef:ExpenseExampleYear05
      contextRef="Pid_S000007195_Cid_C000254554"
      decimals="0"
      id="ixv-11260"
      unitRef="usd">933</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleNoRedemptionYear05
      contextRef="Pid_S000007195_Cid_C000254554"
      decimals="0"
      id="ixv-11261"
      unitRef="usd">933</oef:ExpenseExampleNoRedemptionYear05>
    <oef:ExpenseExampleYear05
      contextRef="Pid_S000007195_Cid_C000254556"
      decimals="0"
      id="ixv-11262"
      unitRef="usd">401</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleNoRedemptionYear05
      contextRef="Pid_S000007195_Cid_C000254556"
      decimals="0"
      id="ixv-11263"
      unitRef="usd">401</oef:ExpenseExampleNoRedemptionYear05>
    <oef:ExpenseExampleYear05
      contextRef="Pid_S000007195_Cid_C000254557"
      decimals="0"
      id="ixv-11264"
      unitRef="usd">340</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleNoRedemptionYear05
      contextRef="Pid_S000007195_Cid_C000254557"
      decimals="0"
      id="ixv-11265"
      unitRef="usd">340</oef:ExpenseExampleNoRedemptionYear05>
    <oef:ExpenseExampleYear10
      contextRef="Pid_S000007195_Cid_C000254558"
      decimals="0"
      id="ixv-11266"
      unitRef="usd">1696</oef:ExpenseExampleYear10>
    <oef:ExpenseExampleNoRedemptionYear10
      contextRef="Pid_S000007195_Cid_C000254558"
      decimals="0"
      id="ixv-11267"
      unitRef="usd">1696</oef:ExpenseExampleNoRedemptionYear10>
    <oef:ExpenseExampleYear10
      contextRef="Pid_S000007195_Cid_C000254555"
      decimals="0"
      id="ixv-11268"
      unitRef="usd">1765</oef:ExpenseExampleYear10>
    <oef:ExpenseExampleNoRedemptionYear10
      contextRef="Pid_S000007195_Cid_C000254555"
      decimals="0"
      id="ixv-11269"
      unitRef="usd">1765</oef:ExpenseExampleNoRedemptionYear10>
    <oef:ExpenseExampleYear10
      contextRef="Pid_S000007195_Cid_C000254554"
      decimals="0"
      id="ixv-11270"
      unitRef="usd">1831</oef:ExpenseExampleYear10>
    <oef:ExpenseExampleNoRedemptionYear10
      contextRef="Pid_S000007195_Cid_C000254554"
      decimals="0"
      id="ixv-11271"
      unitRef="usd">1831</oef:ExpenseExampleNoRedemptionYear10>
    <oef:ExpenseExampleYear10
      contextRef="Pid_S000007195_Cid_C000254556"
      decimals="0"
      id="ixv-11272"
      unitRef="usd">894</oef:ExpenseExampleYear10>
    <oef:ExpenseExampleNoRedemptionYear10
      contextRef="Pid_S000007195_Cid_C000254556"
      decimals="0"
      id="ixv-11273"
      unitRef="usd">894</oef:ExpenseExampleNoRedemptionYear10>
    <oef:ExpenseExampleYear10
      contextRef="Pid_S000007195_Cid_C000254557"
      decimals="0"
      id="ixv-11274"
      unitRef="usd">762</oef:ExpenseExampleYear10>
    <oef:ExpenseExampleNoRedemptionYear10
      contextRef="Pid_S000007195_Cid_C000254557"
      decimals="0"
      id="ixv-11275"
      unitRef="usd">762</oef:ExpenseExampleNoRedemptionYear10>
    <oef:PortfolioTurnoverHeading contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-808">Portfolio Turnover</oef:PortfolioTurnoverHeading>
    <oef:PortfolioTurnoverTextBlock contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-812">The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 34% of the average value of its portfolio.</oef:PortfolioTurnoverTextBlock>
    <oef:PortfolioTurnoverRate
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      decimals="4"
      id="ixv-11276"
      unitRef="pure">0.34</oef:PortfolioTurnoverRate>
    <oef:StrategyHeading contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-816">Principal Investment Strategies</oef:StrategyHeading>
    <oef:StrategyNarrativeTextBlock contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-819">
Normally investing primarily in common stocks.Normally investing at least 80% of assets in blue chip companies (companies that, in Fidelity Management &amp; Research Company LLC (FMR)'s view, are well-known, well-established and well-capitalized), which generally have large or medium market capitalizations.Investing in companies that FMR believes have above-average growth potential (stocks of these companies are often called "growth" stocks).Investing in domestic and foreign issuers.Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and economic conditions, to select investments.Effective December 11, 2025, normally investing at least 80% of assets in blue chip growth companies.
Blue chip companies are companies that, in the Adviser's view, are well-known, well-established and well-capitalized, which, for purposes of this fund, are companies with a higher market capitalization than the lowest capitalized company in any of the S&amp;P 500 Index, Russell 1000 Index, or Dow Jones Industrial Average.
Growth companies are companies the Adviser believes have above average growth potential. The Adviser considers a number of factors in determining a company's growth potential, such as whether the company is included in a third-party growth benchmark or classified as a growth company by a third-party vendor, if the company's projected earnings per share growth, sales growth per share or free cash flow growth or its trailing earnings per share growth is above the equity market median, if the company's research and development expenses exceed sales, general and administrative expenses, or if the company is raising capital to grow, fund or expand its business. A company's growth potential can be determined under any of these factors.
Derivative instruments that provide investment exposure to the investments above or exposure to one or more market risk factors associated with such investments are included in the fund's 80% policy, consistent with the fund's investment policies and limitations with respect to investments in derivatives.
</oef:StrategyNarrativeTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007195_contentCd_ABCF-PRO_RiskMember_StockMarketVolatilityMember"
      id="ixv-844">Stock Market Volatility.
Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.
</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007195_contentCd_ABCF-PRO_RiskMember_ForeignExposureMember"
      id="ixv-850">Foreign Exposure.
Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.
</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007195_contentCd_ABCF-PRO_RiskMember_IssuerSpecificChangesMember"
      id="ixv-856">Issuer-Specific Changes.
The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole.
</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007195_contentCd_ABCF-PRO_RiskMember_GrowthInvestingMember"
      id="ixv-862">"Growth" Investing.
 "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks.&#160; &#160; &#160;
</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007195_contentCd_ABCF-PRO_RiskMember_MidCapInvestingMember"
      id="ixv-869">Mid Cap Investing.
The value of securities of medium size, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers.
</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007195_contentCd_ABCF-PRO_RiskMember_RiskNondiversifiedStatusMember"
      id="ixv-876">In addition, the fund is classified as non-diversified under the Investment Company Act of 1940 (1940 Act), which means that it has the ability to invest a greater portion of assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund.</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007195_contentCd_ABCF-PRO_RiskMember_RiskNotInsuredDepositoryInstitutionMember"
      id="ixv-879">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007195_contentCd_ABCF-PRO_RiskMember_RiskLoseMoneyMember"
      id="ixv-882">&#160;You could lose money by investing in the fund.</oef:RiskTextBlock>
    <oef:BarChartAndPerformanceTableHeading contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-886">Performance</oef:BarChartAndPerformanceTableHeading>
    <oef:PerformanceNarrativeTextBlock contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-889">
The following information is intended to help you understand the risks of investing in the fund.
The information illustrates the changes in the performance of Fidelity&#xae; Blue Chip Growth Fund, a class of shares of the fund, from year to year and compares the performance of this class to the performance of a securities market index and an additional index over various periods of time. The additional index has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.
Visit www.fidelity.com for more recent performance information for Fidelity&#xae; Blue Chip Growth Fund, a class of shares of the fund.
Performance history will be available at institutional.fidelity.com for Class A, Class M, Class C, Class I, and Class Z after Class A, Class M, Class C, Class I, and Class Z have been in operation for one calendar year.</oef:PerformanceNarrativeTextBlock>
    <oef:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-893">The information illustrates the changes in the performance of Fidelity&#xae; Blue Chip Growth Fund, a class of shares of the fund, from year to year and compares the performance of this class to the performance of a securities market index and an additional index over various periods of time.</oef:PerformanceInformationIllustratesVariabilityOfReturns>
    <oef:PerformancePastDoesNotIndicateFuture contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-896">Past performance (before and after taxes) is not an indication of future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:PerformanceAvailabilityWebSiteAddress contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-900"> www.fidelity.com </oef:PerformanceAvailabilityWebSiteAddress>
    <oef:PerformanceOneYearOrLess contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-904">Performance history will be available at institutional.fidelity.com for Class A, Class M, Class C, Class I, and Class Z after Class A, Class M, Class C, Class I, and Class Z have been in operation for one calendar year.</oef:PerformanceOneYearOrLess>
    <oef:BarChartHeading contextRef="Pid_S000007195_contentCd_ABCF-PRO" id="ixv-910">Year-by-Year Returns</oef:BarChartHeading>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_2015"
      decimals="INF"
      id="ixv-11277"
      unitRef="pure">0.0628</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_2016"
      decimals="INF"
      id="ixv-11278"
      unitRef="pure">0.0159</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_2017"
      decimals="INF"
      id="ixv-11279"
      unitRef="pure">0.3606</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_2018"
      decimals="INF"
      id="ixv-11280"
      unitRef="pure">0.0107</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_2019"
      decimals="INF"
      id="ixv-11281"
      unitRef="pure">0.3344</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_2020"
      decimals="INF"
      id="ixv-11282"
      unitRef="pure">0.6223</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_2021"
      decimals="INF"
      id="ixv-11283"
      unitRef="pure">0.2271</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_2022"
      decimals="INF"
      id="ixv-11284"
      unitRef="pure">-0.3846</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_2023"
      decimals="INF"
      id="ixv-11285"
      unitRef="pure">0.5560</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_2024"
      decimals="INF"
      id="ixv-11286"
      unitRef="pure">0.3970</oef:AnnlRtrPct>
    <oef:HighestQuarterlyReturnLabel
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1016"> &#160;&#160;&#160;Highest Quarter Return</oef:HighestQuarterlyReturnLabel>
    <oef:BarChartHighestQuarterlyReturn
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      decimals="4"
      id="ixv-11287"
      unitRef="pure">0.3782</oef:BarChartHighestQuarterlyReturn>
    <oef:BarChartHighestQuarterlyReturnDate
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1026">2020-06-30</oef:BarChartHighestQuarterlyReturnDate>
    <oef:LowestQuarterlyReturnLabel
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1031"> &#160;&#160;&#160;Lowest Quarter Return</oef:LowestQuarterlyReturnLabel>
    <oef:BarChartLowestQuarterlyReturn
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      decimals="4"
      id="ixv-11288"
      unitRef="pure">-0.2730</oef:BarChartLowestQuarterlyReturn>
    <oef:BarChartLowestQuarterlyReturnDate
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1042">2022-06-30</oef:BarChartLowestQuarterlyReturnDate>
    <oef:YearToDateReturnLabel
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1047"> &#160;&#160;&#160;Year-to-Date Return</oef:YearToDateReturnLabel>
    <oef:BarChartYearToDateReturn
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      decimals="4"
      id="ixv-11289"
      unitRef="pure">0.0418</oef:BarChartYearToDateReturn>
    <oef:BarChartYearToDateReturnDate
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1057">2025-06-30</oef:BarChartYearToDateReturnDate>
    <oef:BarChartReturnsForClassNotOfferedInProspectus
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1061">* The returns shown above are for Fidelity&#xae; Blue Chip Growth Fund, a class of shares of the fund that is not offered through this prospectus. Class A, Class M, Class C, Class I, and Class Z would have substantially similar annual returns to Fidelity&#xae; Blue Chip Growth Fund because the classes are invested in the same portfolio of securities. Class A's, Class M's, Class C's, Class I's, and Class Z's returns would differ from Fidelity&#xae; Blue Chip Growth Fund's returns only to the extent that the classes do not have the same expenses.</oef:BarChartReturnsForClassNotOfferedInProspectus>
    <oef:PerformanceTableHeading
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1065">Average Annual Returns</oef:PerformanceTableHeading>
    <oef:PerformanceTableNarrativeTextBlock
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1070">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</oef:PerformanceTableNarrativeTextBlock>
    <oef:PerformanceTableUsesHighestFederalRate
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1071">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</oef:PerformanceTableUsesHighestFederalRate>
    <oef:PerformanceTableNotRelevantToTaxDeferred
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1074"> The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</oef:PerformanceTableNotRelevantToTaxDeferred>
    <oef:PerformanceTableExplanationAfterTaxHigher
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1076"> Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</oef:PerformanceTableExplanationAfterTaxHigher>
    <oef:AverageAnnualReturnLabel
      contextRef="Pid_S000007195_Cid_C000254558_ReturnBeforeTaxes_01"
      id="ixv-1120">Return Before Taxes</oef:AverageAnnualReturnLabel>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_ReturnBeforeTaxes_01"
      decimals="4"
      id="ixv-11290"
      unitRef="pure">0.3970</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_ReturnBeforeTaxes_05"
      decimals="4"
      id="ixv-11291"
      unitRef="pure">0.2164</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_ReturnBeforeTaxes_10"
      decimals="4"
      id="ixv-11292"
      unitRef="pure">0.1810</oef:AvgAnnlRtrPct>
    <oef:AverageAnnualReturnLabel
      contextRef="Pid_S000007195_Cid_C000254558_AfterTaxesOnDistributions_01"
      id="ixv-1134">Return After Taxes on Distributions</oef:AverageAnnualReturnLabel>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_AfterTaxesOnDistributions_01"
      decimals="4"
      id="ixv-11293"
      unitRef="pure">0.3764</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_AfterTaxesOnDistributions_05"
      decimals="4"
      id="ixv-11294"
      unitRef="pure">0.2030</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_AfterTaxesOnDistributions_10"
      decimals="4"
      id="ixv-11295"
      unitRef="pure">0.1681</oef:AvgAnnlRtrPct>
    <oef:AverageAnnualReturnLabel
      contextRef="Pid_S000007195_Cid_C000254558_AfterTaxesOnDistributionsAndSales_01"
      id="ixv-1148">Return After Taxes on Distributions and Sale of Fund Shares</oef:AverageAnnualReturnLabel>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_AfterTaxesOnDistributionsAndSales_01"
      decimals="4"
      id="ixv-11296"
      unitRef="pure">0.2472</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_AfterTaxesOnDistributionsAndSales_05"
      decimals="4"
      id="ixv-11297"
      unitRef="pure">0.1742</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Cid_C000254558_AfterTaxesOnDistributionsAndSales_10"
      decimals="4"
      id="ixv-11298"
      unitRef="pure">0.1498</oef:AvgAnnlRtrPct>
    <oef:AverageAnnualReturnLabel
      contextRef="Pid_S000007195_Indexid_RS004_contentCd_ABCF-PRO_01"
      id="ixv-1163">Russell 1000&#xae; Growth Index</oef:AverageAnnualReturnLabel>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Indexid_RS004_contentCd_ABCF-PRO_01"
      decimals="4"
      id="ixv-11299"
      unitRef="pure">0.3336</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Indexid_RS004_contentCd_ABCF-PRO_05"
      decimals="4"
      id="ixv-11300"
      unitRef="pure">0.1896</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Indexid_RS004_contentCd_ABCF-PRO_10"
      decimals="4"
      id="ixv-11301"
      unitRef="pure">0.1678</oef:AvgAnnlRtrPct>
    <oef:AverageAnnualReturnLabel
      contextRef="Pid_S000007195_Indexid_RS001_contentCd_ABCF-PRO_01"
      id="ixv-1185">Russell 1000&#xae; Index</oef:AverageAnnualReturnLabel>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Indexid_RS001_contentCd_ABCF-PRO_01"
      decimals="4"
      id="ixv-11302"
      unitRef="pure">0.2451</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Indexid_RS001_contentCd_ABCF-PRO_05"
      decimals="4"
      id="ixv-11303"
      unitRef="pure">0.1428</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007195_Indexid_RS001_contentCd_ABCF-PRO_10"
      decimals="4"
      id="ixv-11304"
      unitRef="pure">0.1287</oef:AvgAnnlRtrPct>
    <oef:BarChartReturnsForClassNotOfferedInProspectus
      contextRef="Pid_S000007195_contentCd_ABCF-PRO"
      id="ixv-1220">* The returns shown above are for Fidelity&#xae; Blue Chip Growth Fund, a class of shares of the fund that is not offered through this prospectus. Class A, Class M, Class C, Class I, and Class Z would have substantially similar annual returns to Fidelity&#xae; Blue Chip Growth Fund because the classes are invested in the same portfolio of securities. Class A's, Class M's, Class C's, Class I's, and Class Z's returns would differ from Fidelity&#xae; Blue Chip Growth Fund's returns only to the extent that the classes do not have the same expenses.</oef:BarChartReturnsForClassNotOfferedInProspectus>
    <oef:RiskReturnHeading
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-5379">Fund Summary
Fund/Class:
Fidelity&#xae; OTC Portfolio/Fidelity Advisor&#xae; OTC Fund A, M, C, I, Z&#160;
</oef:RiskReturnHeading>
    <oef:ObjectiveHeading
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-5392">Investment Objective</oef:ObjectiveHeading>
    <oef:ObjectivePrimaryTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-5396">Fidelity&#xae; OTC Portfolio seeks capital appreciation.</oef:ObjectivePrimaryTextBlock>
    <oef:ExpenseHeading
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-5399">Fee Table</oef:ExpenseHeading>
    <oef:ExpenseNarrativeTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-5401">
The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or certain other Fidelity&#xae; funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 32 of the prospectus and in the sales charge waiver appendix to the prospectus.
</oef:ExpenseNarrativeTextBlock>
    <oef:ExpenseBreakpointDiscounts
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-5406">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the fund or certain other Fidelity&#xae; funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 32 of the prospectus</oef:ExpenseBreakpointDiscounts>
    <oef:ExpenseBreakpointMinimumInvestmentRequiredAmount
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      decimals="0"
      id="ixv-11305"
      unitRef="usd">50000</oef:ExpenseBreakpointMinimumInvestmentRequiredAmount>
    <oef:ShareholderFeesCaption
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-5417">Shareholder fees</oef:ShareholderFeesCaption>
    <oef:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="4"
      id="ixv-11306"
      unitRef="pure">0.0575</oef:MaximumCumulativeSalesChargeOverOfferingPrice>
    <oef:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="4"
      id="ixv-11307"
      unitRef="pure">0.0350</oef:MaximumCumulativeSalesChargeOverOfferingPrice>
    <oef:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="4"
      id="ixv-11308"
      unitRef="pure">0</oef:MaximumCumulativeSalesChargeOverOfferingPrice>
    <oef:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="4"
      id="ixv-11309"
      unitRef="pure">0</oef:MaximumCumulativeSalesChargeOverOfferingPrice>
    <oef:MaximumCumulativeSalesChargeOverOfferingPrice
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="4"
      id="ixv-11310"
      unitRef="pure">0</oef:MaximumCumulativeSalesChargeOverOfferingPrice>
    <oef:MaximumDeferredSalesChargeOverOther
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="4"
      id="footnoteAOTC-PROS000007191SHF_AC000254551"
      unitRef="pure">0</oef:MaximumDeferredSalesChargeOverOther>
    <oef:MaximumDeferredSalesChargeOverOther
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="4"
      id="footnoteAOTC-PROS000007191SHF_AC000254552"
      unitRef="pure">0</oef:MaximumDeferredSalesChargeOverOther>
    <oef:MaximumDeferredSalesChargeOverOther
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="4"
      id="footnoteAOTC-PROS000007191SHF_BC000254550"
      unitRef="pure">0.0100</oef:MaximumDeferredSalesChargeOverOther>
    <oef:MaximumDeferredSalesChargeOverOther
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="4"
      id="ixv-11314"
      unitRef="pure">0</oef:MaximumDeferredSalesChargeOverOther>
    <oef:MaximumDeferredSalesChargeOverOther
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="4"
      id="ixv-11315"
      unitRef="pure">0</oef:MaximumDeferredSalesChargeOverOther>
    <oef:ExpensesDeferredChargesTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-5520">Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% and 0.25%, respectively.</oef:ExpensesDeferredChargesTextBlock>
    <oef:ExpensesDeferredChargesTextBlock contextRef="Pid_S000007191_Cid_C000254550" id="ixv-5528">On Class C shares redeemed less than one year after purchase.</oef:ExpensesDeferredChargesTextBlock>
    <oef:OperatingExpensesCaption
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-5533">Annual Operating Expenses</oef:OperatingExpensesCaption>
    <oef:ManagementFeesOverAssets
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="6"
      id="footnoteS000007191AOTC-PROAOE_AC000254551_MF"
      unitRef="pure">0.0080</oef:ManagementFeesOverAssets>
    <oef:ManagementFeesOverAssets
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="6"
      id="footnoteS000007191AOTC-PROAOE_AC000254552_MF"
      unitRef="pure">0.0079</oef:ManagementFeesOverAssets>
    <oef:ManagementFeesOverAssets
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="6"
      id="footnoteS000007191AOTC-PROAOE_AC000254550_MF"
      unitRef="pure">0.0079</oef:ManagementFeesOverAssets>
    <oef:ManagementFeesOverAssets
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="6"
      id="footnoteS000007191AOTC-PROAOE_AC000254553_MF"
      unitRef="pure">0.0079</oef:ManagementFeesOverAssets>
    <oef:ManagementFeesOverAssets
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="6"
      id="footnoteS000007191AOTC-PROAOE_AC000254549_MF"
      unitRef="pure">0.0068</oef:ManagementFeesOverAssets>
    <oef:DistributionAndService12b1FeesOverAssets
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="6"
      id="ixv-11321"
      unitRef="pure">0.0025</oef:DistributionAndService12b1FeesOverAssets>
    <oef:DistributionAndService12b1FeesOverAssets
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="6"
      id="ixv-11322"
      unitRef="pure">0.0050</oef:DistributionAndService12b1FeesOverAssets>
    <oef:DistributionAndService12b1FeesOverAssets
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="6"
      id="ixv-11323"
      unitRef="pure">0.0100</oef:DistributionAndService12b1FeesOverAssets>
    <oef:DistributionAndService12b1FeesOverAssets
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="6"
      id="ixv-11324"
      unitRef="pure">0</oef:DistributionAndService12b1FeesOverAssets>
    <oef:DistributionAndService12b1FeesOverAssets
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="6"
      id="ixv-11325"
      unitRef="pure">0</oef:DistributionAndService12b1FeesOverAssets>
    <oef:OtherExpensesOverAssets
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="6"
      id="ixv-11326"
      unitRef="pure">0.0000</oef:OtherExpensesOverAssets>
    <oef:OtherExpensesOverAssets
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="6"
      id="ixv-11327"
      unitRef="pure">0.0001</oef:OtherExpensesOverAssets>
    <oef:OtherExpensesOverAssets
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="6"
      id="ixv-11328"
      unitRef="pure">0.0000</oef:OtherExpensesOverAssets>
    <oef:OtherExpensesOverAssets
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="6"
      id="ixv-11329"
      unitRef="pure">0.0000</oef:OtherExpensesOverAssets>
    <oef:OtherExpensesOverAssets
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="6"
      id="ixv-11330"
      unitRef="pure">0.0001</oef:OtherExpensesOverAssets>
    <oef:ExpensesOverAssets
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="6"
      id="ixv-11331"
      unitRef="pure">0.0105</oef:ExpensesOverAssets>
    <oef:ExpensesOverAssets
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="6"
      id="ixv-11332"
      unitRef="pure">0.0130</oef:ExpensesOverAssets>
    <oef:ExpensesOverAssets
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="6"
      id="ixv-11333"
      unitRef="pure">0.0179</oef:ExpensesOverAssets>
    <oef:ExpensesOverAssets
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="6"
      id="ixv-11334"
      unitRef="pure">0.0079</oef:ExpensesOverAssets>
    <oef:ExpensesOverAssets
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="6"
      id="ixv-11335"
      unitRef="pure">0.0069</oef:ExpensesOverAssets>
    <oef:ExpenseExampleNarrativeTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-5704">This example helps compare the cost of investing in the fund with the cost of investing in other funds.
Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated and if you hold your shares:</oef:ExpenseExampleNarrativeTextBlock>
    <oef:ExpenseExampleYear01
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="0"
      id="ixv-11336"
      unitRef="usd">676</oef:ExpenseExampleYear01>
    <oef:ExpenseExampleNoRedemptionYear01
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="0"
      id="ixv-11337"
      unitRef="usd">676</oef:ExpenseExampleNoRedemptionYear01>
    <oef:ExpenseExampleYear01
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="0"
      id="ixv-11338"
      unitRef="usd">478</oef:ExpenseExampleYear01>
    <oef:ExpenseExampleNoRedemptionYear01
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="0"
      id="ixv-11339"
      unitRef="usd">478</oef:ExpenseExampleNoRedemptionYear01>
    <oef:ExpenseExampleYear01
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="0"
      id="ixv-11340"
      unitRef="usd">282</oef:ExpenseExampleYear01>
    <oef:ExpenseExampleNoRedemptionYear01
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="0"
      id="ixv-11341"
      unitRef="usd">182</oef:ExpenseExampleNoRedemptionYear01>
    <oef:ExpenseExampleYear01
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="0"
      id="ixv-11342"
      unitRef="usd">81</oef:ExpenseExampleYear01>
    <oef:ExpenseExampleNoRedemptionYear01
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="0"
      id="ixv-11343"
      unitRef="usd">81</oef:ExpenseExampleNoRedemptionYear01>
    <oef:ExpenseExampleYear01
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="0"
      id="ixv-11344"
      unitRef="usd">70</oef:ExpenseExampleYear01>
    <oef:ExpenseExampleNoRedemptionYear01
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="0"
      id="ixv-11345"
      unitRef="usd">70</oef:ExpenseExampleNoRedemptionYear01>
    <oef:ExpenseExampleYear03
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="0"
      id="ixv-11346"
      unitRef="usd">890</oef:ExpenseExampleYear03>
    <oef:ExpenseExampleNoRedemptionYear03
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="0"
      id="ixv-11347"
      unitRef="usd">890</oef:ExpenseExampleNoRedemptionYear03>
    <oef:ExpenseExampleYear03
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="0"
      id="ixv-11348"
      unitRef="usd">748</oef:ExpenseExampleYear03>
    <oef:ExpenseExampleNoRedemptionYear03
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="0"
      id="ixv-11349"
      unitRef="usd">748</oef:ExpenseExampleNoRedemptionYear03>
    <oef:ExpenseExampleYear03
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="0"
      id="ixv-11350"
      unitRef="usd">563</oef:ExpenseExampleYear03>
    <oef:ExpenseExampleNoRedemptionYear03
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="0"
      id="ixv-11351"
      unitRef="usd">563</oef:ExpenseExampleNoRedemptionYear03>
    <oef:ExpenseExampleYear03
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="0"
      id="ixv-11352"
      unitRef="usd">252</oef:ExpenseExampleYear03>
    <oef:ExpenseExampleNoRedemptionYear03
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="0"
      id="ixv-11353"
      unitRef="usd">252</oef:ExpenseExampleNoRedemptionYear03>
    <oef:ExpenseExampleYear03
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="0"
      id="ixv-11354"
      unitRef="usd">221</oef:ExpenseExampleYear03>
    <oef:ExpenseExampleNoRedemptionYear03
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="0"
      id="ixv-11355"
      unitRef="usd">221</oef:ExpenseExampleNoRedemptionYear03>
    <oef:ExpenseExampleYear05
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="0"
      id="ixv-11356"
      unitRef="usd">1121</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleNoRedemptionYear05
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="0"
      id="ixv-11357"
      unitRef="usd">1121</oef:ExpenseExampleNoRedemptionYear05>
    <oef:ExpenseExampleYear05
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="0"
      id="ixv-11358"
      unitRef="usd">1038</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleNoRedemptionYear05
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="0"
      id="ixv-11359"
      unitRef="usd">1038</oef:ExpenseExampleNoRedemptionYear05>
    <oef:ExpenseExampleYear05
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="0"
      id="ixv-11360"
      unitRef="usd">970</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleNoRedemptionYear05
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="0"
      id="ixv-11361"
      unitRef="usd">970</oef:ExpenseExampleNoRedemptionYear05>
    <oef:ExpenseExampleYear05
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="0"
      id="ixv-11362"
      unitRef="usd">439</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleNoRedemptionYear05
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="0"
      id="ixv-11363"
      unitRef="usd">439</oef:ExpenseExampleNoRedemptionYear05>
    <oef:ExpenseExampleYear05
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="0"
      id="ixv-11364"
      unitRef="usd">384</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleNoRedemptionYear05
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="0"
      id="ixv-11365"
      unitRef="usd">384</oef:ExpenseExampleNoRedemptionYear05>
    <oef:ExpenseExampleYear10
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="0"
      id="ixv-11366"
      unitRef="usd">1784</oef:ExpenseExampleYear10>
    <oef:ExpenseExampleNoRedemptionYear10
      contextRef="Pid_S000007191_Cid_C000254551"
      decimals="0"
      id="ixv-11367"
      unitRef="usd">1784</oef:ExpenseExampleNoRedemptionYear10>
    <oef:ExpenseExampleYear10
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="0"
      id="ixv-11368"
      unitRef="usd">1863</oef:ExpenseExampleYear10>
    <oef:ExpenseExampleNoRedemptionYear10
      contextRef="Pid_S000007191_Cid_C000254552"
      decimals="0"
      id="ixv-11369"
      unitRef="usd">1863</oef:ExpenseExampleNoRedemptionYear10>
    <oef:ExpenseExampleYear10
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="0"
      id="ixv-11370"
      unitRef="usd">1911</oef:ExpenseExampleYear10>
    <oef:ExpenseExampleNoRedemptionYear10
      contextRef="Pid_S000007191_Cid_C000254550"
      decimals="0"
      id="ixv-11371"
      unitRef="usd">1911</oef:ExpenseExampleNoRedemptionYear10>
    <oef:ExpenseExampleYear10
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="0"
      id="ixv-11372"
      unitRef="usd">978</oef:ExpenseExampleYear10>
    <oef:ExpenseExampleNoRedemptionYear10
      contextRef="Pid_S000007191_Cid_C000254553"
      decimals="0"
      id="ixv-11373"
      unitRef="usd">978</oef:ExpenseExampleNoRedemptionYear10>
    <oef:ExpenseExampleYear10
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="0"
      id="ixv-11374"
      unitRef="usd">859</oef:ExpenseExampleYear10>
    <oef:ExpenseExampleNoRedemptionYear10
      contextRef="Pid_S000007191_Cid_C000254549"
      decimals="0"
      id="ixv-11375"
      unitRef="usd">859</oef:ExpenseExampleNoRedemptionYear10>
    <oef:PortfolioTurnoverHeading
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6013">Portfolio Turnover</oef:PortfolioTurnoverHeading>
    <oef:PortfolioTurnoverTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6017">The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 53% of the average value of its portfolio.</oef:PortfolioTurnoverTextBlock>
    <oef:PortfolioTurnoverRate
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      decimals="4"
      id="ixv-11376"
      unitRef="pure">0.53</oef:PortfolioTurnoverRate>
    <oef:StrategyHeading
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6021">Principal Investment Strategies</oef:StrategyHeading>
    <oef:StrategyNarrativeTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6024">
Normally investing primarily in common stocks.Normally investing at least 80% of assets in securities principally traded on NASDAQ&#xae; or an over-the-counter (OTC) market.
The Adviser defines NASDAQ&#xae; and OTC securities as securities principally traded on either the NASDAQ&#xae; exchange or the OTC market (a telephone or computer network that connects securities dealers), which may include equity or debt securities. These securities can be issued by companies of any size. However, the OTC market has more small and medium-sized companies than other markets.
Effective December 11, 2025, derivative instruments that provide investment exposure to the investments above or exposure to one or more market risk factors associated with such investments are included in the fund's 80% policy, consistent with the fund's investment policies and limitations with respect to investments in derivatives.
&#160;
Investing more than 25% of total assets in the technology sector.Investing in domestic and foreign issuers.Investing in either "growth" stocks or "value" stocks or both.Using fundamental analysis of factors such as each issuer's financial condition and industry position, as well as market and economic conditions, to select investments.
</oef:StrategyNarrativeTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO_RiskMember_StockMarketVolatilityMember"
      id="ixv-6056">Stock Market Volatility.
Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments.
</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO_RiskMember_ForeignExposureMember"
      id="ixv-6062">Foreign Exposure.
Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.
</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO_RiskMember_TechnologyIndustryConcentrationMember"
      id="ixv-6068">Technology Industry Concentration.
The technology industries can be significantly affected by obsolescence of existing technology, short product cycles, falling prices and profits, competition from new market entrants, and general economic conditions.
</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO_RiskMember_IssuerSpecificChangesMember"
      id="ixv-6074">Issuer-Specific Changes.
The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole.
The value of securities of smaller issuers can be more volatile than that of larger issuers.
</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO_RiskMember_GrowthInvestingMember"
      id="ixv-6082">"Growth" Investing.
 "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks.&#160; &#160; &#160;
</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO_RiskMember_ValueInvestingMember"
      id="ixv-6089">"Value" Investing.
"Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time.
</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO_RiskMember_RiskNondiversifiedStatusMember"
      id="ixv-6096">In addition, the fund is classified as non-diversified under the Investment Company Act of 1940 (1940 Act), which means that it has the ability to invest a greater portion of assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund.</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO_RiskMember_RiskNotInsuredDepositoryInstitutionMember"
      id="ixv-6099">An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO_RiskMember_RiskLoseMoneyMember"
      id="ixv-6102">&#160;You could lose money by investing in the fund.</oef:RiskTextBlock>
    <oef:BarChartAndPerformanceTableHeading
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6106">Performance</oef:BarChartAndPerformanceTableHeading>
    <oef:PerformanceNarrativeTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6109">
The following information is intended to help you understand the risks of investing in the fund.
The information illustrates the changes in the performance of Fidelity&#xae; OTC Portfolio, a class of shares of the fund, from year to year and compares the performance of this class to the performance of a securities market index and an additional index over various periods of time. The additional index has characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance (before and after taxes) is not an indication of future performance.
Visit www.fidelity.com for more recent performance information for Fidelity&#xae; OTC Portfolio, a class of shares of the fund.
Performance history will be available at institutional.fidelity.com for Class A, Class M, Class C, Class I, and Class Z after Class A, Class M, Class C, Class I, and Class Z have been in operation for one calendar year.</oef:PerformanceNarrativeTextBlock>
    <oef:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6113">The information illustrates the changes in the performance of Fidelity&#xae; OTC Portfolio, a class of shares of the fund, from year to year and compares the performance of this class to the performance of a securities market index and an additional index over various periods of time.</oef:PerformanceInformationIllustratesVariabilityOfReturns>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6116">Past performance (before and after taxes) is not an indication of future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:PerformanceAvailabilityWebSiteAddress
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6120"> www.fidelity.com </oef:PerformanceAvailabilityWebSiteAddress>
    <oef:PerformanceOneYearOrLess
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6124">Performance history will be available at institutional.fidelity.com for Class A, Class M, Class C, Class I, and Class Z after Class A, Class M, Class C, Class I, and Class Z have been in operation for one calendar year.</oef:PerformanceOneYearOrLess>
    <oef:BarChartHeading
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6130">Year-by-Year Returns</oef:BarChartHeading>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_2015"
      decimals="INF"
      id="ixv-11377"
      unitRef="pure">0.1092</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_2016"
      decimals="INF"
      id="ixv-11378"
      unitRef="pure">0.0311</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_2017"
      decimals="INF"
      id="ixv-11379"
      unitRef="pure">0.3859</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_2018"
      decimals="INF"
      id="ixv-11380"
      unitRef="pure">-0.0321</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_2019"
      decimals="INF"
      id="ixv-11381"
      unitRef="pure">0.3922</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_2020"
      decimals="INF"
      id="ixv-11382"
      unitRef="pure">0.4679</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_2021"
      decimals="INF"
      id="ixv-11383"
      unitRef="pure">0.2504</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_2022"
      decimals="INF"
      id="ixv-11384"
      unitRef="pure">-0.3212</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_2023"
      decimals="INF"
      id="ixv-11385"
      unitRef="pure">0.4264</oef:AnnlRtrPct>
    <oef:AnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_2024"
      decimals="INF"
      id="ixv-11386"
      unitRef="pure">0.3461</oef:AnnlRtrPct>
    <oef:HighestQuarterlyReturnLabel
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6237"> &#160;&#160;&#160;Highest Quarter Return</oef:HighestQuarterlyReturnLabel>
    <oef:BarChartHighestQuarterlyReturn
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      decimals="4"
      id="ixv-11387"
      unitRef="pure">0.3092</oef:BarChartHighestQuarterlyReturn>
    <oef:BarChartHighestQuarterlyReturnDate
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6247">2020-06-30</oef:BarChartHighestQuarterlyReturnDate>
    <oef:LowestQuarterlyReturnLabel
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6252"> &#160;&#160;&#160;Lowest Quarter Return</oef:LowestQuarterlyReturnLabel>
    <oef:BarChartLowestQuarterlyReturn
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      decimals="4"
      id="ixv-11388"
      unitRef="pure">-0.2222</oef:BarChartLowestQuarterlyReturn>
    <oef:BarChartLowestQuarterlyReturnDate
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6263">2022-06-30</oef:BarChartLowestQuarterlyReturnDate>
    <oef:YearToDateReturnLabel
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6268"> &#160;&#160;&#160;Year-to-Date Return</oef:YearToDateReturnLabel>
    <oef:BarChartYearToDateReturn
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      decimals="4"
      id="ixv-11389"
      unitRef="pure">0.0312</oef:BarChartYearToDateReturn>
    <oef:BarChartYearToDateReturnDate
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6278">2025-06-30</oef:BarChartYearToDateReturnDate>
    <oef:BarChartReturnsForClassNotOfferedInProspectus
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6282">* The returns shown above are for Fidelity&#xae; OTC Portfolio, a class of shares of the fund that is not offered through this prospectus. Class A, Class M, Class C, Class I, and Class Z would have substantially similar annual returns to Fidelity&#xae; OTC Portfolio because the classes are invested in the same portfolio of securities. Class A's, Class M's, Class C's, Class I's, and Class Z's returns would differ from Fidelity&#xae; OTC Portfolio's returns only to the extent that the classes do not have the same expenses.</oef:BarChartReturnsForClassNotOfferedInProspectus>
    <oef:PerformanceTableHeading
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6286">Average Annual Returns</oef:PerformanceTableHeading>
    <oef:PerformanceTableNarrativeTextBlock
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6291">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes. Actual after-tax returns may differ depending on your individual circumstances. The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan). Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</oef:PerformanceTableNarrativeTextBlock>
    <oef:PerformanceTableUsesHighestFederalRate
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6292">After-tax returns are calculated using the historical highest individual federal marginal income tax rates, but do not reflect the impact of state or local taxes.</oef:PerformanceTableUsesHighestFederalRate>
    <oef:PerformanceTableNotRelevantToTaxDeferred
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6295"> The after-tax returns shown are not relevant if you hold your shares in a retirement account or in another tax-deferred arrangement, such as an employee benefit plan (profit sharing, 401(k), or 403(b) plan).</oef:PerformanceTableNotRelevantToTaxDeferred>
    <oef:PerformanceTableExplanationAfterTaxHigher
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6297"> Return After Taxes on Distributions and Sale of Fund Shares may be higher than other returns for the same period due to a tax benefit of realizing a capital loss upon the sale of fund shares.</oef:PerformanceTableExplanationAfterTaxHigher>
    <oef:AverageAnnualReturnLabel
      contextRef="Pid_S000007191_Cid_C000254551_ReturnBeforeTaxes_01"
      id="ixv-6341">Return Before Taxes</oef:AverageAnnualReturnLabel>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_ReturnBeforeTaxes_01"
      decimals="4"
      id="ixv-11390"
      unitRef="pure">0.3461</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_ReturnBeforeTaxes_05"
      decimals="4"
      id="ixv-11391"
      unitRef="pure">0.1906</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_ReturnBeforeTaxes_10"
      decimals="4"
      id="ixv-11392"
      unitRef="pure">0.1772</oef:AvgAnnlRtrPct>
    <oef:AverageAnnualReturnLabel
      contextRef="Pid_S000007191_Cid_C000254551_AfterTaxesOnDistributions_01"
      id="ixv-6355">Return After Taxes on Distributions</oef:AverageAnnualReturnLabel>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_AfterTaxesOnDistributions_01"
      decimals="4"
      id="ixv-11393"
      unitRef="pure">0.3037</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_AfterTaxesOnDistributions_05"
      decimals="4"
      id="ixv-11394"
      unitRef="pure">0.1697</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_AfterTaxesOnDistributions_10"
      decimals="4"
      id="ixv-11395"
      unitRef="pure">0.1585</oef:AvgAnnlRtrPct>
    <oef:AverageAnnualReturnLabel
      contextRef="Pid_S000007191_Cid_C000254551_AfterTaxesOnDistributionsAndSales_01"
      id="ixv-6369">Return After Taxes on Distributions and Sale of Fund Shares</oef:AverageAnnualReturnLabel>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_AfterTaxesOnDistributionsAndSales_01"
      decimals="4"
      id="ixv-11396"
      unitRef="pure">0.2302</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_AfterTaxesOnDistributionsAndSales_05"
      decimals="4"
      id="ixv-11397"
      unitRef="pure">0.1499</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Cid_C000254551_AfterTaxesOnDistributionsAndSales_10"
      decimals="4"
      id="ixv-11398"
      unitRef="pure">0.1440</oef:AvgAnnlRtrPct>
    <oef:AverageAnnualReturnLabel
      contextRef="Pid_S000007191_Indexid_NS004_contentCd_AOTC-PRO_01"
      id="ixv-6384">Nasdaq Composite Index&#xae;</oef:AverageAnnualReturnLabel>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Indexid_NS004_contentCd_AOTC-PRO_01"
      decimals="4"
      id="ixv-11399"
      unitRef="pure">0.2957</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Indexid_NS004_contentCd_AOTC-PRO_05"
      decimals="4"
      id="ixv-11400"
      unitRef="pure">0.1749</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Indexid_NS004_contentCd_AOTC-PRO_10"
      decimals="4"
      id="ixv-11401"
      unitRef="pure">0.1620</oef:AvgAnnlRtrPct>
    <oef:AverageAnnualReturnLabel
      contextRef="Pid_S000007191_Indexid_SP001_contentCd_AOTC-PRO_01"
      id="ixv-6406">S&amp;P 500&#xae; Index</oef:AverageAnnualReturnLabel>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Indexid_SP001_contentCd_AOTC-PRO_01"
      decimals="4"
      id="ixv-11402"
      unitRef="pure">0.2502</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Indexid_SP001_contentCd_AOTC-PRO_05"
      decimals="4"
      id="ixv-11403"
      unitRef="pure">0.1453</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="Pid_S000007191_Indexid_SP001_contentCd_AOTC-PRO_10"
      decimals="4"
      id="ixv-11404"
      unitRef="pure">0.1310</oef:AvgAnnlRtrPct>
    <oef:BarChartReturnsForClassNotOfferedInProspectus
      contextRef="Pid_S000007191_contentCd_AOTC-PRO"
      id="ixv-6441">* The returns shown above are for Fidelity&#xae; OTC Portfolio, a class of shares of the fund that is not offered through this prospectus. Class A, Class M, Class C, Class I, and Class Z would have substantially similar annual returns to Fidelity&#xae; OTC Portfolio because the classes are invested in the same portfolio of securities. Class A's, Class M's, Class C's, Class I's, and Class Z's returns would differ from Fidelity&#xae; OTC Portfolio's returns only to the extent that the classes do not have the same expenses.</oef:BarChartReturnsForClassNotOfferedInProspectus>
    <link:footnoteLink
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        <link:footnote id="footnoteABCF-PROS000007195SHF_A" xlink:label="footnoteABCF-PROS000007195SHF_A" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:span style="font-family:'Fidelity Futura Std Book',Arial,Helvetica,sans-serif;font-size:6px;color:#000000;font-style:normal;vertical-align:4px;font-weight:normal;">A</xhtml:span><xhtml:span style="font-family:'Fidelity Futura Std Book',Arial,Helvetica,sans-serif;font-size:11px;color:#000000;font-style:normal;font-weight:normal;"><xhtml:span style="padding-right:10px"/></xhtml:span><xhtml:span style="font-family:'Fidelity Futura Std Book',Arial,Helvetica,sans-serif;font-size:11px;color:#000000;font-style:normal;font-weight:normal;">Class A and Class M purchases of $1 million or more will not be subject to a front-end sales charge. Such Class A and Class M purchases may be subject, upon redemption, to a contingent deferred sales charge (CDSC) of 1.00% and 0.25%, respectively.</xhtml:span></link:footnote>
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