v3.25.2
Risk/Return Detail Data - FidelitySmallCapGrowthK6Fund-PRO - USD ($)
 12 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 120 Months Ended
Sep. 29, 2025
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Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Sep. 29, 2025
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FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | Fidelity Advisor Small Cap Value Fund - Class A                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 5.75%                                
Maximum Deferred Sales Charge (as a percentage) [1] 0.00%                                
Management Fees (as a percentage of Assets) [2] 0.94%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 1.20%                                
Expense Example, with Redemption, 1 Year $ 690                                
Expense Example, with Redemption, 3 Years 934                                
Expense Example, with Redemption, 5 Years 1,197                                
Expense Example, with Redemption, 10 Years 1,946                                
Expense Example, No Redemption, 1 Year 690                                
Expense Example, No Redemption, 3 Years 934                                
Expense Example, No Redemption, 5 Years 1,197                                
Expense Example, No Redemption, 10 Years $ 1,946                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   2.73%                     9.81%       8.05%
Annual Return [Percent]     9.00% 17.44% (13.38%) 37.83% 10.83% 20.47% (15.21%) 11.98% 21.03% (1.89%)          
FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | Fidelity Advisor Small Cap Value Fund - Class M                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 3.50%                                
Maximum Deferred Sales Charge (as a percentage) [1] 0.00%                                
Management Fees (as a percentage of Assets) [2] 0.94%                                
Distribution and Service (12b-1) Fees 0.50%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 1.45%                                
Expense Example, with Redemption, 1 Year $ 492                                
Expense Example, with Redemption, 3 Years 793                                
Expense Example, with Redemption, 5 Years 1,114                                
Expense Example, with Redemption, 10 Years 2,025                                
Expense Example, No Redemption, 1 Year 492                                
Expense Example, No Redemption, 3 Years 793                                
Expense Example, No Redemption, 5 Years 1,114                                
Expense Example, No Redemption, 10 Years $ 2,025                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   4.88%                     10.06%       8.04%
FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | Fidelity Advisor Small Cap Value Fund - Class C                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) [3] 1.00%                                
Management Fees (as a percentage of Assets) [2] 0.94%                                
Distribution and Service (12b-1) Fees 1.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 1.95%                                
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                
Expense Example, with Redemption, 1 Year $ 298                                
Expense Example, with Redemption, 3 Years 612                                
Expense Example, with Redemption, 5 Years 1,052                                
Expense Example, with Redemption, 10 Years 2,080                                
Expense Example, No Redemption, 1 Year 198                                
Expense Example, No Redemption, 3 Years 612                                
Expense Example, No Redemption, 5 Years 1,052                                
Expense Example, No Redemption, 10 Years $ 2,080                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   7.15%                     10.27%       8.02%
FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | Fidelity Advisor Small Cap Value Fund - Class I                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) [2] 0.94%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.95%                                
Expense Example, with Redemption, 1 Year $ 97                                
Expense Example, with Redemption, 3 Years 303                                
Expense Example, with Redemption, 5 Years 525                                
Expense Example, with Redemption, 10 Years 1,166                                
Expense Example, No Redemption, 1 Year 97                                
Expense Example, No Redemption, 3 Years 303                                
Expense Example, No Redemption, 5 Years 525                                
Expense Example, No Redemption, 10 Years $ 1,166                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   9.24%                     11.42%       8.97%
FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | Fidelity Advisor Small Cap Value Fund - Class Z                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) [2] 0.83%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.84%                                
Expense Example, with Redemption, 1 Year $ 86                                
Expense Example, with Redemption, 3 Years 268                                
Expense Example, with Redemption, 5 Years 466                                
Expense Example, with Redemption, 10 Years 1,037                                
Expense Example, No Redemption, 1 Year 86                                
Expense Example, No Redemption, 3 Years 268                                
Expense Example, No Redemption, 5 Years 466                                
Expense Example, No Redemption, 10 Years $ 1,037                                
Annual Return, Inception Date Oct. 02, 2018                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   9.39%                     11.55%   9.43% [4]    
FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Small Cap Value Fund /Fidelity Advisor® Small Cap Value Fund A, M, C, I, Z                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Small Cap Value Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 33 of the prospectus and in the sales charge waiver appendix to the prospectus.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 96 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 96.00%                                
Expenses Deferred Charges [Text Block] 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.                                
Expense Breakpoint Discounts [Text] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 33 of the prospectus                                
Expense Breakpoint, Minimum Investment Required [Amount] $ 50,000                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in securities of companies with small market capitalizations (which, for purposes of this fund, are those companies with market capitalizations similar to companies in the Russell 2000® Index or the S&P SmallCap 600® Index). Investing in securities of companies that Fidelity Management & Research Company LLC (FMR) believes are undervalued in the marketplace in relation to factors such as assets, sales, earnings, growth potential, or cash flow, or in relation to securities of other companies in the same industry (stocks of these companies are often called "value" 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 securities of value companies with small market capitalizations. The Adviser generally defines small market capitalization companies as those whose market capitalization is similar to the market capitalization of companies in the Russell 2000 ® Index or the S&P SmallCap 600 ® Index. Value companies are companies the Adviser believes are undervalued in the marketplace. The Adviser considers traditional and other measures of value, such as whether the company is included in a third-party value benchmark or classified as a value company by a third-party vendor, whether the company's free cash flow yield is above the equity market median, whether the company's enterprise value (the total value of a company's outstanding equity and debt) relative to earnings is below the equity market median, or whether the company's price-to-book (P/B) ratio or projected price-to-earnings (P/E) ratio is below the equity market median. An issuer may be determined to be a value company 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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 institutional.fidelity.com for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] institutional.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Bar Chart Narrative [Text Block] The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.                                
Bar Chart Does Not Reflect Sales Loads [Text] The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return (1.58%)                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Dec. 31, 2020                                
Highest Quarterly Return 33.06%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (32.15%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Does Reflect Sales Loads Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table One Class of after Tax Shown [Text] After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. 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. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. 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.                                
FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | After Taxes on Distributions | Fidelity Advisor Small Cap Value Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   1.15%                     8.33%       6.04%
FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | After Taxes on Distributions and Sales | Fidelity Advisor Small Cap Value Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   2.45%                     7.47%       5.91%
FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | RS015                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 2000® Value Index                              
Average Annual Return, Percent   8.05%                     7.29%       7.14%
FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | RS003                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 3000® Index                              
Average Annual Return, Percent   23.81%                     13.86%       12.55%
FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | Fidelity OTC Portfolio - Class K                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) [5] 0.65%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.00%                                
Expenses (as a percentage of Assets) 0.65%                                
Expense Example, with Redemption, 1 Year $ 66                                
Expense Example, with Redemption, 3 Years 208                                
Expense Example, with Redemption, 5 Years 362                                
Expense Example, with Redemption, 10 Years $ 810                                
Average Annual Return, Label [Optional Text]   Class K                              
Average Annual Return, Percent   34.66%                     19.15%       17.83%
Annual Return [Percent]     34.66% 42.92% (32.12%) 25.15% 46.88% 39.38% (3.10%) 38.75% 3.23% 11.05%          
FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® OTC Portfolio /K                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® OTC Portfolio seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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.                                
Portfolio Turnover, Rate 53.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in securities principally traded on NASDAQ® or an over-the-counter (OTC) market . The Adviser defines NASDAQ ® and OTC securities as securities principally traded on either the NASDAQ ® 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.   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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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 is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.401k.com                                
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 3.18%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 30.93%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Jun. 30, 2022                                
Lowest Quarterly Return (22.21%)                                
Performance Table Heading Average Annual Returns                                
FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | NS004                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Nasdaq Composite Index®                              
Average Annual Return, Percent   29.57%                     17.49%       16.20%
FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | SP001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   S&P 500® Index                              
Average Annual Return, Percent   25.02%                     14.53%       13.10%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | Fidelity Blue Chip Growth Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) [6] 0.60%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.61%                                
Expense Example, with Redemption, 1 Year $ 62                                
Expense Example, with Redemption, 3 Years 195                                
Expense Example, with Redemption, 5 Years 340                                
Expense Example, with Redemption, 10 Years $ 762                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   39.70%                     21.64%       18.10%
Annual Return [Percent]     39.70% 55.60% (38.46%) 22.71% 62.23% 33.44% 1.07% 36.06% 1.59% 6.28%          
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Blue Chip Growth Fund /Fidelity® Blue Chip Growth Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Blue Chip Growth Fund seeks growth of capital over the long term.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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.                                
Portfolio Turnover, Rate 34.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in blue chip companies (companies that, in Fidelity Management & 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&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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 4.18%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 37.82%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Jun. 30, 2022                                
Lowest Quarterly Return (27.30%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | After Taxes on Distributions | Fidelity Blue Chip Growth Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   37.64%                     20.30%       16.81%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | After Taxes on Distributions and Sales | Fidelity Blue Chip Growth Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   24.72%                     17.42%       14.98%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | RS004                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Growth Index                              
Average Annual Return, Percent   33.36%                     18.96%       16.78%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | RS001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Index                              
Average Annual Return, Percent   24.51%                     14.28%       12.87%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | Fidelity Blue Chip Value Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) [7] 0.54%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.02%                                
Expenses (as a percentage of Assets) 0.56%                                
Expense Example, with Redemption, 1 Year $ 57                                
Expense Example, with Redemption, 3 Years 179                                
Expense Example, with Redemption, 5 Years 313                                
Expense Example, with Redemption, 10 Years $ 701                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   4.84%                     6.31%       6.58%
Annual Return [Percent]     4.84% 7.08% 1.52% 25.04% (4.72%) 21.71% (8.65%) 14.87% 11.19% (1.96%)          
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Blue Chip Value Fund /Fidelity® Blue Chip Value Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Blue Chip Value Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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.                                
Portfolio Turnover, Rate 53.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in blue chip companies (companies that, in Fidelity Management & 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 are undervalued in the marketplace in relation to factors such as assets, sales, earnings, growth potential, or cash flow, or in relation to securities of other companies in the same industry (stocks of these companies are often called "value" 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 value 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&P 500 Index, Russell 1000 Index, or Dow Jones Industrial Average. Value companies are companies the Adviser believes are undervalued in the marketplace. The Adviser considers traditional and other measures of value, such as whether the company is included in a third-party value benchmark or classified as a value company by a third-party vendor, whether the company's free cash flow yield is above the equity market median, whether the company's enterprise value (the total value of a company's outstanding equity and debt) relative to earnings is below the equity market median, or whether the company's price-to-book (P/B) ratio or projected price-to-earnings (P/E) ratio is below the equity market median. An issuer may be determined to be a value company 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 2.05%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Dec. 31, 2020                                
Highest Quarterly Return 16.24%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (30.60%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | After Taxes on Distributions | Fidelity Blue Chip Value Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   2.73%                     5.44%       5.94%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | After Taxes on Distributions and Sales | Fidelity Blue Chip Value Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   4.44%                     4.90%       5.23%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | RS001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Index                              
Average Annual Return, Percent   24.51%                     14.28%       12.87%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | RS005                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Value Index                              
Average Annual Return, Percent   14.37%                     8.68%       8.49%
FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | Fidelity OTC K6 Portfolio                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.50%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.00%                                
Expenses (as a percentage of Assets) 0.50%                                
Expense Example, with Redemption, 1 Year $ 51                                
Expense Example, with Redemption, 3 Years 160                                
Expense Example, with Redemption, 5 Years 280                                
Expense Example, with Redemption, 10 Years $ 628                                
Annual Return, Inception Date Jun. 13, 2019                                
Average Annual Return, Label [Optional Text]   Fidelity® OTC K6 Portfolio                              
Average Annual Return, Percent   32.76%                     19.09% 20.40% [8]      
Annual Return [Percent]     32.76% 43.48% (32.32%) 25.97% 47.52%                    
FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund: Fidelity® OTC K6 Portfolio                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® OTC K6 Portfolio seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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 , which are not reflected in the tables and examples below.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 64 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 64.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in securities principally traded on NASDAQ® or an over-the-counter (OTC) market . The Adviser defines NASDAQ ® and OTC securities as securities principally traded on either the NASDAQ ® 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.   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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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 is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.401k.com                                
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 3.52%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 30.90%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Jun. 30, 2022                                
Lowest Quarterly Return (22.46%)                                
Performance Table Heading Average Annual Returns                                
FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | NS004                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Nasdaq Composite Index®                              
Average Annual Return, Percent   29.57%                     17.49% 18.58%      
FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | SP001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   S&P 500® Index                              
Average Annual Return, Percent   25.02%                     14.53% 15.48%      
FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | Fidelity Leveraged Company Stock Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.68%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.69%                                
Expense Example, with Redemption, 1 Year $ 70                                
Expense Example, with Redemption, 3 Years 221                                
Expense Example, with Redemption, 5 Years 384                                
Expense Example, with Redemption, 10 Years $ 859                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   26.69%                     14.45%       10.50%
Annual Return [Percent]     26.69% 26.11% (23.14%) 26.16% 26.74% 35.60% (16.42%) 21.02% 7.26% (6.05%)          
FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Leveraged Company Stock Fund /Fidelity® Leveraged Company Stock Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Leveraged Company Stock Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 12 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 12.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing at least 80% of assets in stocks. Normally investing primarily in common stocks of companies that issue lower- and medium-quality debt. Potentially investing in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds). Investing in domestic and foreign issuers. Investing in either "growth" stocks or "value" stocks or both. Using fundamental analysis of each issuer's financial condition and industry position and market and economic conditions to select investments. Effective December 11, 2025, normally investing at least 80% of the fund's assets in stocks of leveraged companies. Stocks are a type of equity security that represent an ownership interest in an issuer. Stocks include common stocks (including depositary receipts evidencing ownership of common stock) and preferred stocks. Leveraged companies are companies that issue long-term debt (i.e., debt with a repayment period of greater than one year). 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.                                  
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and additional indexes over various periods of time. The additional indexes have 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and additional indexes over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 10.46%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 30.63%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (30.43%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | After Taxes on Distributions | Fidelity Leveraged Company Stock Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   22.58%                     11.79%       7.58%
FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | After Taxes on Distributions and Sales | Fidelity Leveraged Company Stock Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   18.42%                     11.15%       7.64%
FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | RS003                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 3000® Index                              
Average Annual Return, Percent   23.81%                     13.86%       12.55%
FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | IXXVV                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Fidelity U.S. Leveraged Stock Linked Index℠                              
Average Annual Return, Percent   21.82%                     12.09%       7.26%
FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | RS006                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell Midcap® Index                              
Average Annual Return, Percent   15.34%                     9.92%       9.63%
FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio | Fidelity Growth & Income Portfolio - Class K                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.45%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.46%                                
Expense Example, with Redemption, 1 Year $ 47                                
Expense Example, with Redemption, 3 Years 148                                
Expense Example, with Redemption, 5 Years 258                                
Expense Example, with Redemption, 10 Years $ 579                                
Average Annual Return, Label [Optional Text]   Class K                              
Average Annual Return, Percent   22.14%                     13.43%       11.49%
Annual Return [Percent]     22.14% 18.72% (4.90%) 25.96% 8.09% 30.37% (8.85%) 17.03% 16.22% (2.18%)          
FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Growth & Income Portfolio /K                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Growth & Income Portfolio seeks high total return through a combination of current income and capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 15 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 15.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing a majority of assets in common stocks with a focus on those that pay current dividends and show potential for capital appreciation. Potentially investing in bonds, including lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), as well as stocks that are not currently paying dividends, but offer prospects for future income or capital appreciation. 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. Effective December 11, 2025, normally investing at least 80% of assets in a combination of securities of growth companies and income-producing securities. 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. Income-producing securities are securities that pay, or are expected to pay within the next three months, dividends or interest. 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index over various periods of time. The index description appears in the "Additional Index Information" section of the prospectus. Past performance is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index over various periods of time.                                
Performance Availability Website Address [Text] www.401k.com                                
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 10.84%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Dec. 31, 2020                                
Highest Quarterly Return 17.30%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (23.31%)                                
Performance Table Heading Average Annual Returns                                
FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio | SP001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   S&P 500® Index                              
Average Annual Return, Percent   25.02%                     14.53%       13.10%
FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | Fidelity Real Estate Income Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.65%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.66%                                
Expense Example, with Redemption, 1 Year $ 67                                
Expense Example, with Redemption, 3 Years 211                                
Expense Example, with Redemption, 5 Years 368                                
Expense Example, with Redemption, 10 Years $ 822                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   7.93%                     3.47%       5.27%
Annual Return [Percent]     7.93% 9.32% (14.54%) 18.90% (1.08%) 17.91% (0.64%) 7.30% 10.21% 1.74%          
FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Real Estate Income Fund /Fidelity® Real Estate Income Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Real Estate Income Fund seeks higher than average income. As a secondary objective, the fund also seeks capital growth.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 24 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 24.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in preferred and common stocks of real estate investment trusts (REITs); debt securities of real estate entities; and commercial and other mortgage-backed securities, with an emphasis on lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds). Normally investing at least 80% of assets in securities of companies principally engaged in the real estate industry and other real estate related investments. Investing in domestic and foreign issuers. Using fundamental analysis of each issuer's financial condition and industry position and market and economic conditions to select investments. Effective December 11, 2025, normally investing at least 80% of assets in debt and income-producing equity securities of companies principally engaged in the real estate industry and other real estate related investments. Debt securities are used by issuers to borrow money. The issuer usually pays a fixed, variable, or floating rate of interest, and must repay the amount borrowed, usually at the maturity of the security. Debt securities include corporate bonds, government securities (including Treasury securities), repurchase agreements, money market securities, mortgage and other asset-backed securities, loans and loan participations, and other securities, such as hybrids and synthetic securities, believed to have debt-like characteristics (e.g., securities classified as Tier 2 Regulatory capital, securities that rank above share capital in an insolvency waterfall, securities with maturity dates and non-cancellable interest payment structures).  Equity securities represent an ownership interest, or the right to acquire an ownership interest, in an issuer. Equity securities include common stocks (including depositary receipts evidencing ownership of common stock), preferred stocks and other preferred securities, convertible securities, rights and warrants, and other securities, such as hybrid securities and trust preferred securities, believed to have equity-like characteristics. Income-producing equity securities are equity securities that pay, or are expected to pay within the next three months, dividends or interest.  A real estate entity or real estate related investment is any company that is principally engaged in the real estate industry and includes commercial and residential mortgage-backed securities; debt securities of real estate entities; equity securities of entities whose primary assets are mortgage loans or commercial or residential mortgage-backed securities; REITs that either own properties or make construction loans and preferred stocks of REITs; real estate developers; companies with substantial real estate holdings; and other companies whose products and services are related to the real estate industry, such as building supply manufacturers, mortgage lenders, or mortgage servicing companies. The Adviser considers a company to be principally engaged in the real estate industry if (i) at least 50% of its assets, income, sales or profits are committed to, or derived from, the real estate industry, or (ii) a third party has given the company an industry or sector classification consistent with the real estate industry. 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.                                
Strategy Portfolio Concentration [Text] Normally investing at least 80% of assets in securities of companies principally engaged in the real estate industry and other real estate related investments.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index, a hypothetical composite of market indexes, and an additional index over various periods of time. The hypothetical composite of market indexes and additional index have 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index, a hypothetical composite of market indexes, and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 3.64%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 16.84%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (25.55%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | After Taxes on Distributions | Fidelity Real Estate Income Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   6.04%                     1.87%       3.41%
FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | After Taxes on Distributions and Sales | Fidelity Real Estate Income Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   4.80%                     2.06%       3.36%
FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | ML038                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   ICE® BofA® US High Yield Constrained Index                              
Average Annual Return, Percent   8.20%                     4.03%       5.08%
FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | LB091                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Bloomberg U.S. Universal Bond Index                              
Average Annual Return, Percent   2.04%                     0.06%       1.73%
FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | F0663                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Fidelity Real Estate Income Composite Index℠                              
Average Annual Return, Percent   5.22%                     1.64%       3.85%
FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund | Fidelity Small Cap Growth K6 Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.60%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) [9] 0.61%                                
Expense Example, with Redemption, 1 Year $ 62                                
Expense Example, with Redemption, 3 Years 195                                
Expense Example, with Redemption, 5 Years 340                                
Expense Example, with Redemption, 10 Years $ 762                                
Annual Return, Inception Date May 25, 2017                                
Average Annual Return, Label [Optional Text]   Fidelity® Small Cap Growth K6 Fund                              
Average Annual Return, Percent   20.99%                     10.55%     12.76% [10]  
Annual Return [Percent]     20.99% 19.62% (25.01%) 10.66% 37.45% 36.25% (4.61%)                
FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund: Fidelity® Small Cap Growth K6 Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Small Cap Growth K6 Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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, which are not reflected in the tables and examples below.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 81 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 81.00%                                
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses. For the period, acquired fund fees and expenses are less than 0.01% and are included in other expenses.                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in securities of companies with small market capitalizations (which, for purposes of this fund, are those companies with market capitalizations similar to companies in the Russell 2000® Index or the S&P SmallCap 600® Index). Investing in companies that Fidelity Management & Research Company LLC (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 securities of growth companies with small market capitalizations. The Adviser generally defines small market capitalization companies as those whose market capitalization is similar to the market capitalization of companies in the Russell 2000 ® Index or the S&P SmallCap 600 ® Index. 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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 is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.401k.com                                
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return (0.90%)                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 27.34%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Dec. 31, 2018                                
Lowest Quarterly Return (22.41%)                                
Performance Table Heading Average Annual Returns                                
FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund | RS003                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 3000® Index                              
Average Annual Return, Percent   23.81%                     13.86%     13.73%  
FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund | RS014                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 2000® Growth Index                              
Average Annual Return, Percent   15.15%                     6.86%     8.43%  
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | Fidelity Advisor OTC Fund - Class A                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 5.75%                                
Maximum Deferred Sales Charge (as a percentage) [11] 0.00%                                
Management Fees (as a percentage of Assets) [12] 0.76%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.04%                                
Expenses (as a percentage of Assets) 1.05%                                
Expense Example, with Redemption, 1 Year $ 676                                
Expense Example, with Redemption, 3 Years 890                                
Expense Example, with Redemption, 5 Years 1,121                                
Expense Example, with Redemption, 10 Years 1,784                                
Expense Example, No Redemption, 1 Year 676                                
Expense Example, No Redemption, 3 Years 890                                
Expense Example, No Redemption, 5 Years 1,121                                
Expense Example, No Redemption, 10 Years $ 1,784                                
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | Fidelity Advisor OTC Fund - Class M                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 3.50%                                
Maximum Deferred Sales Charge (as a percentage) [11] 0.00%                                
Management Fees (as a percentage of Assets) [12] 0.77%                                
Distribution and Service (12b-1) Fees 0.50%                                
Other Expenses (as a percentage of Assets): 0.03%                                
Expenses (as a percentage of Assets) 1.30%                                
Expense Example, with Redemption, 1 Year $ 478                                
Expense Example, with Redemption, 3 Years 748                                
Expense Example, with Redemption, 5 Years 1,038                                
Expense Example, with Redemption, 10 Years 1,863                                
Expense Example, No Redemption, 1 Year 478                                
Expense Example, No Redemption, 3 Years 748                                
Expense Example, No Redemption, 5 Years 1,038                                
Expense Example, No Redemption, 10 Years $ 1,863                                
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | Fidelity Advisor OTC Fund - Class C                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) [13] 1.00%                                
Management Fees (as a percentage of Assets) [12] 0.76%                                
Distribution and Service (12b-1) Fees 1.00%                                
Other Expenses (as a percentage of Assets): 0.03%                                
Expenses (as a percentage of Assets) 1.79%                                
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                
Expense Example, with Redemption, 1 Year $ 282                                
Expense Example, with Redemption, 3 Years 563                                
Expense Example, with Redemption, 5 Years 970                                
Expense Example, with Redemption, 10 Years 1,911                                
Expense Example, No Redemption, 1 Year 182                                
Expense Example, No Redemption, 3 Years 563                                
Expense Example, No Redemption, 5 Years 970                                
Expense Example, No Redemption, 10 Years $ 1,911                                
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | Fidelity Advisor OTC Fund - Class I                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) [12] 0.77%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.02%                                
Expenses (as a percentage of Assets) 0.79%                                
Expense Example, with Redemption, 1 Year $ 81                                
Expense Example, with Redemption, 3 Years 252                                
Expense Example, with Redemption, 5 Years 439                                
Expense Example, with Redemption, 10 Years 978                                
Expense Example, No Redemption, 1 Year 81                                
Expense Example, No Redemption, 3 Years 252                                
Expense Example, No Redemption, 5 Years 439                                
Expense Example, No Redemption, 10 Years $ 978                                
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | Fidelity Advisor OTC Fund - Class Z                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) [12] 0.65%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.04%                                
Expenses (as a percentage of Assets) 0.69%                                
Expense Example, with Redemption, 1 Year $ 70                                
Expense Example, with Redemption, 3 Years 221                                
Expense Example, with Redemption, 5 Years 384                                
Expense Example, with Redemption, 10 Years 859                                
Expense Example, No Redemption, 1 Year 70                                
Expense Example, No Redemption, 3 Years 221                                
Expense Example, No Redemption, 5 Years 384                                
Expense Example, No Redemption, 10 Years $ 859                                
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® OTC Portfolio /Fidelity Advisor® OTC Fund A, M, C, I, Z                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® OTC Portfolio seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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 ® 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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.                                
Portfolio Turnover, Rate 53.00%                                
Expenses Deferred Charges [Text Block] 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.                                
Expense Breakpoint Discounts [Text] 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 ® 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                                
Expense Breakpoint, Minimum Investment Required [Amount] $ 50,000                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in securities principally traded on NASDAQ® or an over-the-counter (OTC) market . The Adviser defines NASDAQ ® and OTC securities as securities principally traded on either the NASDAQ ® 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.   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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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® 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® 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of Fidelity® 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.                                
Performance One Year or Less [Text] 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.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Bar Chart, Returns for Class Not Offered in Prospectus [Text] * The returns shown above are for Fidelity® 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® 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® OTC Portfolio's returns only to the extent that the classes do not have the same expenses.                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 3.12%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 30.92%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Jun. 30, 2022                                
Lowest Quarterly Return (22.22%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | NS004                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Nasdaq Composite Index®                              
Average Annual Return, Percent   29.57%                     17.49%       16.20%
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | SP001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   S&P 500® Index                              
Average Annual Return, Percent   25.02%                     14.53%       13.10%
FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | Fidelity Series Real Estate Income Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.00%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.00%                                
Expenses (as a percentage of Assets) 0.00%                                
Expense Example, with Redemption, 1 Year $ 0                                
Expense Example, with Redemption, 3 Years 0                                
Expense Example, with Redemption, 5 Years 0                                
Expense Example, with Redemption, 10 Years $ 0                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   9.87%                     4.09%       5.44%
Annual Return [Percent]     9.87% 8.29% (11.79%) 15.78% 0.56% 16.01% 0.67% 7.44% 8.31% 2.30%          
FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund: Fidelity® Series Real Estate Income Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Series Real Estate Income Fund seeks higher than average income. As a secondary objective, the fund also seeks capital growth.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 9 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 9.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in preferred and common stocks of real estate investment trusts (REITs); debt securities of real estate entities; and commercial and other mortgage-backed securities, with an emphasis on lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds). Normally investing at least 80% of assets in securities of companies principally engaged in the real estate industry and other real estate related investments. Investing in domestic and foreign issuers. Using fundamental analysis of each issuer's financial condition and industry position and market and economic conditions to select investments. Effective December 11, 2025, normally investing at least 80% of assets in debt and income-producing equity securities of companies principally engaged in the real estate industry and other real estate related investments. Debt securities are used by issuers to borrow money. The issuer usually pays a fixed, variable, or floating rate of interest, and must repay the amount borrowed, usually at the maturity of the security. Debt securities include corporate bonds, government securities (including Treasury securities), repurchase agreements, money market securities, mortgage and other asset-backed securities, loans and loan participations, and other securities, such as hybrids and synthetic securities, believed to have debt-like characteristics (e.g., securities classified as Tier 2 Regulatory capital, securities that rank above share capital in an insolvency waterfall, securities with maturity dates and non-cancellable interest payment structures).  Equity securities represent an ownership interest, or the right to acquire an ownership interest, in an issuer. Equity securities include common stocks (including depositary receipts evidencing ownership of common stock), preferred stocks and other preferred securities, convertible securities, rights and warrants, and other securities, such as hybrid securities and trust preferred securities, believed to have equity-like characteristics. Income-producing equity securities are equity securities that pay, or are expected to pay within the next three months, dividends or interest.  A real estate entity or real estate related investment is any company that is principally engaged in the real estate industry and includes commercial and residential mortgage-backed securities; debt securities of real estate entities; equity securities of entities whose primary assets are mortgage loans or commercial or residential mortgage-backed securities; REITs that either own properties or make construction loans and preferred stocks of REITs; real estate developers; companies with substantial real estate holdings; and other companies whose products and services are related to the real estate industry, such as building supply manufacturers, mortgage lenders, or mortgage servicing companies. The Adviser considers a company to be principally engaged in the real estate industry if (i) at least 50% of its assets, income, sales or profits are committed to, or derived from, the real estate industry, or (ii) a third party has given the company an industry or sector classification consistent with the real estate industry. 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.                                
Strategy Portfolio Concentration [Text] Normally investing at least 80% of assets in securities of companies principally engaged in the real estate industry and other real estate related investments.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index, a hypothetical composite of market indexes, and an additional index over various periods of time. The hypothetical composite of market indexes and additional index have 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. The performance shown does not reflect the impact of any fees paid at the fee-based account or plan level, if applicable. Visit www.fidelity.com for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index, a hypothetical composite of market indexes, and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 4.30%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 16.29%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (24.22%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | After Taxes on Distributions | Fidelity Series Real Estate Income Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   7.38%                     1.70%       3.13%
FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | After Taxes on Distributions and Sales | Fidelity Series Real Estate Income Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   5.96%                     2.24%       3.40%
FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | F1677                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Fidelity Series Real Estate Income Composite Index℠                              
Average Annual Return, Percent   5.16%                     1.40%       3.52%
FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | ML038                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   ICE® BofA® US High Yield Constrained Index                              
Average Annual Return, Percent   8.20%                     4.03%       5.08%
FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | LB091                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Bloomberg U.S. Universal Bond Index                              
Average Annual Return, Percent   2.04%                     0.06%       1.73%
FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | Fidelity OTC Portfolio                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) [14] 0.72%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.73%                                
Expense Example, with Redemption, 1 Year $ 75                                
Expense Example, with Redemption, 3 Years 233                                
Expense Example, with Redemption, 5 Years 406                                
Expense Example, with Redemption, 10 Years $ 906                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   34.61%                     19.06%       17.72%
Annual Return [Percent]     34.61% 42.64% (32.12%) 25.04% 46.79% 39.22% (3.21%) 38.59% 3.11% 10.92%          
FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® OTC Portfolio /Fidelity® OTC Portfolio                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® OTC Portfolio seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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.                                
Portfolio Turnover, Rate 53.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in securities principally traded on NASDAQ® or an over-the-counter (OTC) market . The Adviser defines NASDAQ ® and OTC securities as securities principally traded on either the NASDAQ ® 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.   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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 3.12%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 30.92%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Jun. 30, 2022                                
Lowest Quarterly Return (22.22%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | After Taxes on Distributions | Fidelity OTC Portfolio                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   30.37%                     16.97%       15.85%
FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | After Taxes on Distributions and Sales | Fidelity OTC Portfolio                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   23.02%                     14.99%       14.40%
FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | NS004                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Nasdaq Composite Index®                              
Average Annual Return, Percent   29.57%                     17.49%       16.20%
FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | SP001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   S&P 500® Index                              
Average Annual Return, Percent   25.02%                     14.53%       13.10%
FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | Fidelity Advisor Growth & Income Fund - Class A                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 5.75%                                
Maximum Deferred Sales Charge (as a percentage) [15] 0.00%                                
Management Fees (as a percentage of Assets) 0.56%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.82%                                
Expense Example, with Redemption, 1 Year $ 654                                
Expense Example, with Redemption, 3 Years 822                                
Expense Example, with Redemption, 5 Years 1,004                                
Expense Example, with Redemption, 10 Years 1,530                                
Expense Example, No Redemption, 1 Year 654                                
Expense Example, No Redemption, 3 Years 822                                
Expense Example, No Redemption, 5 Years 1,004                                
Expense Example, No Redemption, 10 Years $ 1,530                                
FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | Fidelity Advisor Growth & Income Fund - Class M                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 3.50%                                
Maximum Deferred Sales Charge (as a percentage) [15] 0.00%                                
Management Fees (as a percentage of Assets) 0.56%                                
Distribution and Service (12b-1) Fees 0.50%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 1.07%                                
Expense Example, with Redemption, 1 Year $ 455                                
Expense Example, with Redemption, 3 Years 678                                
Expense Example, with Redemption, 5 Years 919                                
Expense Example, with Redemption, 10 Years 1,610                                
Expense Example, No Redemption, 1 Year 455                                
Expense Example, No Redemption, 3 Years 678                                
Expense Example, No Redemption, 5 Years 919                                
Expense Example, No Redemption, 10 Years $ 1,610                                
FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | Fidelity Advisor Growth & Income Fund - Class C                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) [16] 1.00%                                
Management Fees (as a percentage of Assets) 0.57%                                
Distribution and Service (12b-1) Fees 1.00%                                
Other Expenses (as a percentage of Assets): 0.00%                                
Expenses (as a percentage of Assets) 1.57%                                
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                
Expense Example, with Redemption, 1 Year $ 260                                
Expense Example, with Redemption, 3 Years 496                                
Expense Example, with Redemption, 5 Years 855                                
Expense Example, with Redemption, 10 Years 1,666                                
Expense Example, No Redemption, 1 Year 160                                
Expense Example, No Redemption, 3 Years 496                                
Expense Example, No Redemption, 5 Years 855                                
Expense Example, No Redemption, 10 Years $ 1,666                                
FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | Fidelity Advisor Growth & Income Fund - Class I                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) 0.57%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.00%                                
Expenses (as a percentage of Assets) 0.57%                                
Expense Example, with Redemption, 1 Year $ 58                                
Expense Example, with Redemption, 3 Years 183                                
Expense Example, with Redemption, 5 Years 318                                
Expense Example, with Redemption, 10 Years 714                                
Expense Example, No Redemption, 1 Year 58                                
Expense Example, No Redemption, 3 Years 183                                
Expense Example, No Redemption, 5 Years 318                                
Expense Example, No Redemption, 10 Years $ 714                                
FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | Fidelity Advisor Growth & Income Fund - Class Z                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) 0.45%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.46%                                
Expense Example, with Redemption, 1 Year $ 47                                
Expense Example, with Redemption, 3 Years 148                                
Expense Example, with Redemption, 5 Years 258                                
Expense Example, with Redemption, 10 Years 579                                
Expense Example, No Redemption, 1 Year 47                                
Expense Example, No Redemption, 3 Years 148                                
Expense Example, No Redemption, 5 Years 258                                
Expense Example, No Redemption, 10 Years $ 579                                
FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Growth & Income Portfolio /Fidelity Advisor® Growth & Income Fund A, M, C, I, Z                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Growth & Income Portfolio seeks high total return through a combination of current income and capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 33 of the prospectus and in the sales charge waiver appendix to the prospectus.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 15 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 15.00%                                
Expenses Deferred Charges [Text Block] 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.                                
Expense Breakpoint Discounts [Text] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 33 of the prospectus                                
Expense Breakpoint, Minimum Investment Required [Amount] $ 50,000                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing a majority of assets in common stocks with a focus on those that pay current dividends and show potential for capital appreciation. Potentially investing in bonds, including lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), as well as stocks that are not currently paying dividends, but offer prospects for future income or capital appreciation. 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. Effective December 11, 2025, normally investing at least 80% of assets in a combination of securities of growth companies and income-producing securities. 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. Income-producing securities are securities that pay, or are expected to pay within the next three months, dividends or interest. 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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® Growth & Income 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 over various periods of time. The index description appears 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® Growth & Income 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of Fidelity® Growth & Income 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 over various periods of time.                                
Performance One Year or Less [Text] 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.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance                                
Bar Chart [Heading] Year-by-Year Returns                                
Bar Chart, Returns for Class Not Offered in Prospectus [Text] * The returns shown above are for Fidelity® Growth & Income 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® Growth & Income 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® Growth & Income Portfolio's returns only to the extent that the classes do not have the same expenses.                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 10.79%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Dec. 31, 2020                                
Highest Quarterly Return 17.26%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (23.33%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | SP001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   S&P 500® Index                              
Average Annual Return, Percent   25.02%                     14.53%       13.10%
FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | Fidelity Series Blue Chip Growth Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.00%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.00%                                
Expenses (as a percentage of Assets) 0.00%                                
Expense Example, with Redemption, 1 Year $ 0                                
Expense Example, with Redemption, 3 Years 0                                
Expense Example, with Redemption, 5 Years 0                                
Expense Example, with Redemption, 10 Years $ 0                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   39.66%                     22.54%       18.98%
Annual Return [Percent]     39.66% 57.42% (37.24%) 22.71% 63.23% 33.27% 4.65% 35.94% 1.58% 6.84%          
FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund: Fidelity® Series Blue Chip Growth Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Series Blue Chip Growth Fund seeks growth of capital over the long term.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 50 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 50.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in blue chip companies (companies that, in Fidelity Management & 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&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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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. The performance shown does not reflect the impact of any fees paid at the fee-based account or plan level, if applicable. Visit www.fidelity.com for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 4.18%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 38.99%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Jun. 30, 2022                                
Lowest Quarterly Return (26.72%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | After Taxes on Distributions | Fidelity Series Blue Chip Growth Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   36.56%                     18.31%       15.55%
FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | After Taxes on Distributions and Sales | Fidelity Series Blue Chip Growth Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   25.15%                     17.04%       14.71%
FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | RS004                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Growth Index                              
Average Annual Return, Percent   33.36%                     18.96%       16.78%
FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | RS001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Index                              
Average Annual Return, Percent   24.51%                     14.28%       12.87%
FidelityBlueChipGrowthK6Fund-PRO | Fidelity Blue Chip Growth K6 Fund | Fidelity Blue Chip Growth K6 Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.45%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.00%                                
Expenses (as a percentage of Assets) 0.45%                                
Expense Example, with Redemption, 1 Year $ 46                                
Expense Example, with Redemption, 3 Years 144                                
Expense Example, with Redemption, 5 Years 252                                
Expense Example, with Redemption, 10 Years $ 567                                
Annual Return, Inception Date May 25, 2017                                
Average Annual Return, Label [Optional Text]   Fidelity® Blue Chip Growth K6 Fund                              
Average Annual Return, Percent   38.14%                     21.78%     20.24% [17]  
Annual Return [Percent]     38.14% 55.57% (37.84%) 23.05% 62.94% 36.11% (2.32%)                
FidelityBlueChipGrowthK6Fund-PRO | Fidelity Blue Chip Growth K6 Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund: Fidelity® Blue Chip Growth K6 Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Blue Chip Growth K6 Fund seeks growth of capital over the long term.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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, which are not reflected in the tables and examples below.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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.                                
Portfolio Turnover, Rate 34.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in blue chip companies (companies that, in Fidelity Management & 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&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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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 is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.401k.com                                
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 5.89%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 37.32%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Jun. 30, 2022                                
Lowest Quarterly Return (27.26%)                                
Performance Table Heading Average Annual Returns                                
FidelityBlueChipGrowthK6Fund-PRO | Fidelity Blue Chip Growth K6 Fund | RS004                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Growth Index                              
Average Annual Return, Percent   33.36%                     18.96%     18.56%  
FidelityBlueChipGrowthK6Fund-PRO | Fidelity Blue Chip Growth K6 Fund | RS001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Index                              
Average Annual Return, Percent   24.51%                     14.28%     14.12%  
FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund | Fidelity Dividend Growth Fund - Class K                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) [18] 0.58%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Acquired Fund Fees and Expenses 0.21%                                
Expenses (as a percentage of Assets) [19] 0.80%                                
Expense Example, with Redemption, 1 Year $ 82                                
Expense Example, with Redemption, 3 Years 255                                
Expense Example, with Redemption, 5 Years 444                                
Expense Example, with Redemption, 10 Years $ 990                                
Average Annual Return, Label [Optional Text]   Class K                              
Average Annual Return, Percent   27.57%                     11.76%       10.45%
Annual Return [Percent]     27.57% 17.97% (11.63%) 28.17% 2.30% 28.82% (7.08%) 20.25% 8.19% (0.51%)          
FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Dividend Growth Fund /K                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Dividend Growth Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 81 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 81.00%                                
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing at least 80% of assets in equity securities. Normally investing primarily in common stocks. Normally investing primarily in companies that currently pay, or have a historical record of paying, dividends. 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. Effective December 11, 2025, normally investing at least 80% of assets in equity securities of dividend growth companies. Equity securities represent an ownership interest, or the right to acquire an ownership interest, in an issuer. Equity securities include common stocks (including depositary receipts evidencing ownership of common stock), preferred stocks and other preferred securities, convertible securities, rights and warrants, and other securities, such as hybrid securities and trust preferred securities, believed to have equity-like characteristics. Dividend growth companies are companies that the Adviser believes have favorable prospects to pay and grow dividends over time. The Adviser considers a number of factors in determining whether a company is growing dividends, such as whether the company has positive trailing one-year, three-year, or five-year dividend growth per share, whether a company pays dividends and has a year-over-year decrease in shares outstanding due to share buybacks, or whether the company pays dividends and free cash flow is projected to grow. An issuer may be determined to be a dividend growth company 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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 is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.401k.com                                
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 7.53%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Dec. 31, 2020                                
Highest Quarterly Return 17.94%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (29.13%)                                
Performance Table Heading Average Annual Returns                                
FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund | SP001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   S&P 500® Index                              
Average Annual Return, Percent   25.02%                     14.53%       13.10%
FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund | IXWJP                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Morningstar® US Dividend Growth Index℠                              
Average Annual Return, Percent   16.66%                     10.52%       11.46%
FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | Fidelity Leveraged Company Stock Fund - Class K                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.60%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.61%                                
Expense Example, with Redemption, 1 Year $ 62                                
Expense Example, with Redemption, 3 Years 195                                
Expense Example, with Redemption, 5 Years 340                                
Expense Example, with Redemption, 10 Years $ 762                                
Average Annual Return, Label [Optional Text]   Class K                              
Average Annual Return, Percent   26.80%                     14.55%       10.61%
Annual Return [Percent]     26.80% 26.22% (23.06%) 26.26% 26.85% 35.76% (16.33%) 21.15% 7.38% (5.92%)          
FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Leveraged Company Stock Fund /K                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Leveraged Company Stock Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 12 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 12.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing at least 80% of assets in stocks. Normally investing primarily in common stocks of companies that issue lower- and medium-quality debt. Potentially investing in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds). Investing in domestic and foreign issuers. Investing in either "growth" stocks or "value" stocks or both. Using fundamental analysis of each issuer's financial condition and industry position and market and economic conditions to select investments. Effective December 11, 2025, normally investing at least 80% of the fund's assets in stocks of leveraged companies. Stocks are a type of equity security that represent an ownership interest in an issuer. Stocks include common stocks (including depositary receipts evidencing ownership of common stock) and preferred stocks. Leveraged companies are companies that issue long-term debt (i.e., debt with a repayment period of greater than one year). 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.                                  
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and additional indexes over various periods of time. The additional indexes have characteristics relevant to the fund's investment strategies. Index descriptions appear in the "Additional Index Information" section of the prospectus. Past performance is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and additional indexes over various periods of time.                                
Performance Availability Website Address [Text] www.401k.com                                
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 10.52%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 30.68%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (30.41%)                                
Performance Table Heading Average Annual Returns                                
FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | RS003                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 3000® Index                              
Average Annual Return, Percent   23.81%                     13.86%       12.55%
FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | IXXVV                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Fidelity U.S. Leveraged Stock Linked Index℠                              
Average Annual Return, Percent   21.82%                     12.09%       7.26%
FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | RS006                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell Midcap® Index                              
Average Annual Return, Percent   15.34%                     9.92%       9.63%
FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | Fidelity Dividend Growth Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) [20] 0.66%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Acquired Fund Fees and Expenses 0.21%                                
Expenses (as a percentage of Assets) [21] 0.88%                                
Expense Example, with Redemption, 1 Year $ 90                                
Expense Example, with Redemption, 3 Years 281                                
Expense Example, with Redemption, 5 Years 488                                
Expense Example, with Redemption, 10 Years $ 1,084                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   27.48%                     11.66%       10.33%
Annual Return [Percent]     27.48% 17.83% (11.70%) 28.03% 2.20% 28.73% (7.23%) 20.14% 8.05% (0.63%)          
FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Dividend Growth Fund /Fidelity® Dividend Growth Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Dividend Growth Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 81 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 81.00%                                
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing at least 80% of assets in equity securities. Normally investing primarily in common stocks. Normally investing primarily in companies that currently pay, or have a historical record of paying, dividends. 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. Effective December 11, 2025, normally investing at least 80% of assets in equity securities of dividend growth companies. Equity securities represent an ownership interest, or the right to acquire an ownership interest, in an issuer. Equity securities include common stocks (including depositary receipts evidencing ownership of common stock), preferred stocks and other preferred securities, convertible securities, rights and warrants, and other securities, such as hybrid securities and trust preferred securities, believed to have equity-like characteristics. Dividend growth companies are companies that the Adviser believes have favorable prospects to pay and grow dividends over time. The Adviser considers a number of factors in determining whether a company is growing dividends, such as whether the company has positive trailing one-year, three-year, or five-year dividend growth per share, whether a company pays dividends and has a year-over-year decrease in shares outstanding due to share buybacks, or whether the company pays dividends and free cash flow is projected to grow. An issuer may be determined to be a dividend growth company 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 7.51%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Dec. 31, 2020                                
Highest Quarterly Return 17.91%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (29.15%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | After Taxes on Distributions | Fidelity Dividend Growth Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   24.38%                     9.73%       8.07%
FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | After Taxes on Distributions and Sales | Fidelity Dividend Growth Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   17.91%                     8.80%       7.69%
FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | SP001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   S&P 500® Index                              
Average Annual Return, Percent   25.02%                     14.53%       13.10%
FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | IXWJP                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Morningstar® US Dividend Growth Index℠                              
Average Annual Return, Percent   16.66%                     10.52%       11.46%
FidelityBlueChipGrowthFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | Fidelity Advisor Blue Chip Growth Fund - Class A                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 5.75%                                
Maximum Deferred Sales Charge (as a percentage) [22] 0.00%                                
Management Fees (as a percentage of Assets) [23] 0.64%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.08%                                
Expenses (as a percentage of Assets) 0.97%                                
Expense Example, with Redemption, 1 Year $ 668                                
Expense Example, with Redemption, 3 Years 866                                
Expense Example, with Redemption, 5 Years 1,080                                
Expense Example, with Redemption, 10 Years 1,696                                
Expense Example, No Redemption, 1 Year 668                                
Expense Example, No Redemption, 3 Years 866                                
Expense Example, No Redemption, 5 Years 1,080                                
Expense Example, No Redemption, 10 Years $ 1,696                                
FidelityBlueChipGrowthFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | Fidelity Advisor Blue Chip Growth Fund - Class M                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 3.50%                                
Maximum Deferred Sales Charge (as a percentage) [22] 0.00%                                
Management Fees (as a percentage of Assets) [23] 0.65%                                
Distribution and Service (12b-1) Fees 0.50%                                
Other Expenses (as a percentage of Assets): 0.06%                                
Expenses (as a percentage of Assets) 1.21%                                
Expense Example, with Redemption, 1 Year $ 469                                
Expense Example, with Redemption, 3 Years 721                                
Expense Example, with Redemption, 5 Years 992                                
Expense Example, with Redemption, 10 Years 1,765                                
Expense Example, No Redemption, 1 Year 469                                
Expense Example, No Redemption, 3 Years 721                                
Expense Example, No Redemption, 5 Years 992                                
Expense Example, No Redemption, 10 Years $ 1,765                                
FidelityBlueChipGrowthFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | Fidelity Advisor Blue Chip Growth Fund - Class C                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) [24] 1.00%                                
Management Fees (as a percentage of Assets) [23] 0.64%                                
Distribution and Service (12b-1) Fees 1.00%                                
Other Expenses (as a percentage of Assets): 0.08%                                
Expenses (as a percentage of Assets) 1.72%                                
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                
Expense Example, with Redemption, 1 Year $ 275                                
Expense Example, with Redemption, 3 Years 542                                
Expense Example, with Redemption, 5 Years 933                                
Expense Example, with Redemption, 10 Years 1,831                                
Expense Example, No Redemption, 1 Year 175                                
Expense Example, No Redemption, 3 Years 542                                
Expense Example, No Redemption, 5 Years 933                                
Expense Example, No Redemption, 10 Years $ 1,831                                
FidelityBlueChipGrowthFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | Fidelity Advisor Blue Chip Growth Fund - Class I                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) [23] 0.64%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.08%                                
Expenses (as a percentage of Assets) 0.72%                                
Expense Example, with Redemption, 1 Year $ 74                                
Expense Example, with Redemption, 3 Years 230                                
Expense Example, with Redemption, 5 Years 401                                
Expense Example, with Redemption, 10 Years 894                                
Expense Example, No Redemption, 1 Year 74                                
Expense Example, No Redemption, 3 Years 230                                
Expense Example, No Redemption, 5 Years 401                                
Expense Example, No Redemption, 10 Years $ 894                                
FidelityBlueChipGrowthFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | Fidelity Advisor Blue Chip Growth Fund - Class Z                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) [23] 0.53%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.08%                                
Expenses (as a percentage of Assets) 0.61%                                
Expense Example, with Redemption, 1 Year $ 62                                
Expense Example, with Redemption, 3 Years 195                                
Expense Example, with Redemption, 5 Years 340                                
Expense Example, with Redemption, 10 Years 762                                
Expense Example, No Redemption, 1 Year 62                                
Expense Example, No Redemption, 3 Years 195                                
Expense Example, No Redemption, 5 Years 340                                
Expense Example, No Redemption, 10 Years $ 762                                
FidelityBlueChipGrowthFund-AMCIZPRO | Fidelity Blue Chip Growth Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Blue Chip Growth Fund /Fidelity Advisor® Blue Chip Growth Fund A, M, C, I, Z                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Blue Chip Growth Fund seeks growth of capital over the long term.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 33 of the prospectus and in the sales charge waiver appendix to the prospectus.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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.                                
Portfolio Turnover, Rate 34.00%                                
Expenses Deferred Charges [Text Block] 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.                                
Expense Breakpoint Discounts [Text] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 33 of the prospectus                                
Expense Breakpoint, Minimum Investment Required [Amount] $ 50,000                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in blue chip companies (companies that, in Fidelity Management & 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&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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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® 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® 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of Fidelity® 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.                                
Performance One Year or Less [Text] 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.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Bar Chart, Returns for Class Not Offered in Prospectus [Text] * The returns shown above are for Fidelity® 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® 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® Blue Chip Growth Fund's returns only to the extent that the classes do not have the same expenses.                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 4.18%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 37.82%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Jun. 30, 2022                                
Lowest Quarterly Return (27.30%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelityBlueChipGrowthFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | RS004                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Growth Index                              
Average Annual Return, Percent   33.36%                     18.96%       16.78%
FidelityBlueChipGrowthFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | RS001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Index                              
Average Annual Return, Percent   24.51%                     14.28%       12.87%
FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | Fidelity Blue Chip Growth Fund - Class K                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) [25] 0.53%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.54%                                
Expense Example, with Redemption, 1 Year $ 55                                
Expense Example, with Redemption, 3 Years 173                                
Expense Example, with Redemption, 5 Years 302                                
Expense Example, with Redemption, 10 Years $ 677                                
Average Annual Return, Label [Optional Text]   Class K                              
Average Annual Return, Percent   39.80%                     21.75%       18.21%
Annual Return [Percent]     39.80% 55.76% (38.40%) 22.81% 62.38% 33.56% 1.16% 36.20% 1.71% 6.40%          
FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Blue Chip Growth Fund /K                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Blue Chip Growth Fund seeks growth of capital over the long term.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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.                                
Portfolio Turnover, Rate 34.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in blue chip companies (companies that, in Fidelity Management & 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&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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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 is not an indication of future performance. Visit www.401k.com and log in for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.401k.com                                
Performance Past Does Not Indicate Future [Text] Past performance is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 4.22%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 37.85%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Jun. 30, 2022                                
Lowest Quarterly Return (27.28%)                                
Performance Table Heading Average Annual Returns                                
FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | RS004                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Growth Index                              
Average Annual Return, Percent   33.36%                     18.96%       16.78%
FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | RS001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 1000® Index                              
Average Annual Return, Percent   24.51%                     14.28%       12.87%
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | Fidelity Advisor Leveraged Company Stock Fund - Class A                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 5.75%                                
Maximum Deferred Sales Charge (as a percentage) [26] 0.00%                                
Management Fees (as a percentage of Assets) 0.72%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.98%                                
Expense Example, with Redemption, 1 Year $ 669                                
Expense Example, with Redemption, 3 Years 869                                
Expense Example, with Redemption, 5 Years 1,086                                
Expense Example, with Redemption, 10 Years 1,707                                
Expense Example, No Redemption, 1 Year 669                                
Expense Example, No Redemption, 3 Years 869                                
Expense Example, No Redemption, 5 Years 1,086                                
Expense Example, No Redemption, 10 Years $ 1,707                                
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | Fidelity Advisor Leveraged Company Stock Fund - Class M                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 3.50%                                
Maximum Deferred Sales Charge (as a percentage) [26] 0.00%                                
Management Fees (as a percentage of Assets) 0.72%                                
Distribution and Service (12b-1) Fees 0.50%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 1.23%                                
Expense Example, with Redemption, 1 Year $ 471                                
Expense Example, with Redemption, 3 Years 727                                
Expense Example, with Redemption, 5 Years 1,002                                
Expense Example, with Redemption, 10 Years 1,787                                
Expense Example, No Redemption, 1 Year 471                                
Expense Example, No Redemption, 3 Years 727                                
Expense Example, No Redemption, 5 Years 1,002                                
Expense Example, No Redemption, 10 Years $ 1,787                                
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | Fidelity Advisor Leveraged Company Stock Fund - Class C                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) [27] 1.00%                                
Management Fees (as a percentage of Assets) 0.72%                                
Distribution and Service (12b-1) Fees 1.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 1.73%                                
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                
Expense Example, with Redemption, 1 Year $ 276                                
Expense Example, with Redemption, 3 Years 545                                
Expense Example, with Redemption, 5 Years 939                                
Expense Example, with Redemption, 10 Years 1,842                                
Expense Example, No Redemption, 1 Year 176                                
Expense Example, No Redemption, 3 Years 545                                
Expense Example, No Redemption, 5 Years 939                                
Expense Example, No Redemption, 10 Years $ 1,842                                
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | Fidelity Advisor Leveraged Company Stock Fund - Class I                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) 0.72%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.73%                                
Expense Example, with Redemption, 1 Year $ 75                                
Expense Example, with Redemption, 3 Years 233                                
Expense Example, with Redemption, 5 Years 406                                
Expense Example, with Redemption, 10 Years 906                                
Expense Example, No Redemption, 1 Year 75                                
Expense Example, No Redemption, 3 Years 233                                
Expense Example, No Redemption, 5 Years 406                                
Expense Example, No Redemption, 10 Years $ 906                                
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | Fidelity Advisor Leveraged Company Stock Fund - Class Z                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) 0.60%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.61%                                
Expense Example, with Redemption, 1 Year $ 62                                
Expense Example, with Redemption, 3 Years 195                                
Expense Example, with Redemption, 5 Years 340                                
Expense Example, with Redemption, 10 Years 762                                
Expense Example, No Redemption, 1 Year 62                                
Expense Example, No Redemption, 3 Years 195                                
Expense Example, No Redemption, 5 Years 340                                
Expense Example, No Redemption, 10 Years $ 762                                
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Leveraged Company Stock Fund /Fidelity Advisor® Leveraged Company Stock Fund A, M, C, I, Z                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Leveraged Company Stock Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 33 of the prospectus and in the sales charge waiver appendix to the prospectus.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 12 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 12.00%                                
Expenses Deferred Charges [Text Block] 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.                                
Expense Breakpoint Discounts [Text] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 33 of the prospectus                                
Expense Breakpoint, Minimum Investment Required [Amount] $ 50,000                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing at least 80% of assets in stocks. Normally investing primarily in common stocks of companies that issue lower- and medium-quality debt. Potentially investing in lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds). Investing in domestic and foreign issuers. Investing in either "growth" stocks or "value" stocks or both. Using fundamental analysis of each issuer's financial condition and industry position and market and economic conditions to select investments. Effective December 11, 2025, normally investing at least 80% of the fund's assets in stocks of leveraged companies. Stocks are a type of equity security that represent an ownership interest in an issuer. Stocks include common stocks (including depositary receipts evidencing ownership of common stock) and preferred stocks. Leveraged companies are companies that issue long-term debt (i.e., debt with a repayment period of greater than one year). 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.                                  
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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® Leveraged Company Stock 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 additional indexes over various periods of time. The additional indexes have 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® Leveraged Company Stock 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of Fidelity® Leveraged Company Stock 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 additional indexes over various periods of time.                                
Performance One Year or Less [Text] 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.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Bar Chart, Returns for Class Not Offered in Prospectus [Text] * The returns shown above are for Fidelity® Leveraged Company Stock 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® Leveraged Company Stock 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® Leveraged Company Stock Fund's returns only to the extent that the classes do not have the same expenses.                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 10.46%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 30.63%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (30.43%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | RS003                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 3000® Index                              
Average Annual Return, Percent   23.81%                     13.86%       12.55%
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | IXXVV                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Fidelity U.S. Leveraged Stock Linked Index℠                              
Average Annual Return, Percent   21.82%                     12.09%       7.26%
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | RS006                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell Midcap® Index                              
Average Annual Return, Percent   15.34%                     9.92%       9.63%
FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | Fidelity Advisor Real Estate Income Fund - Class A                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 4.00%                                
Maximum Deferred Sales Charge (as a percentage) [28] 0.00%                                
Management Fees (as a percentage of Assets) 0.69%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.95%                                
Expense Example, with Redemption, 1 Year $ 493                                
Expense Example, with Redemption, 3 Years 691                                
Expense Example, with Redemption, 5 Years 904                                
Expense Example, with Redemption, 10 Years 1,520                                
Expense Example, No Redemption, 1 Year 493                                
Expense Example, No Redemption, 3 Years 691                                
Expense Example, No Redemption, 5 Years 904                                
Expense Example, No Redemption, 10 Years $ 1,520                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   3.30%                     2.35%       4.57%
Annual Return [Percent]     7.60% 9.02% (14.78%) 18.64% (1.36%) 17.51% (0.82%) 7.04% 9.92% 1.55%          
FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | Fidelity Advisor Real Estate Income Fund - Class M                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 4.00%                                
Maximum Deferred Sales Charge (as a percentage) [28] 0.00%                                
Management Fees (as a percentage of Assets) 0.69%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.95%                                
Expense Example, with Redemption, 1 Year $ 493                                
Expense Example, with Redemption, 3 Years 691                                
Expense Example, with Redemption, 5 Years 904                                
Expense Example, with Redemption, 10 Years 1,520                                
Expense Example, No Redemption, 1 Year 493                                
Expense Example, No Redemption, 3 Years 691                                
Expense Example, No Redemption, 5 Years 904                                
Expense Example, No Redemption, 10 Years $ 1,520                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   3.28%                     2.33%       4.55%
FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | Fidelity Advisor Real Estate Income Fund - Class C                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) [29] 1.00%                                
Management Fees (as a percentage of Assets) 0.69%                                
Distribution and Service (12b-1) Fees 1.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 1.70%                                
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                
Expense Example, with Redemption, 1 Year $ 273                                
Expense Example, with Redemption, 3 Years 536                                
Expense Example, with Redemption, 5 Years 923                                
Expense Example, with Redemption, 10 Years 1,810                                
Expense Example, No Redemption, 1 Year 173                                
Expense Example, No Redemption, 3 Years 536                                
Expense Example, No Redemption, 5 Years 923                                
Expense Example, No Redemption, 10 Years $ 1,810                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   5.78%                     2.42%       4.36%
FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | Fidelity Advisor Real Estate Income Fund - Class I                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) 0.69%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.70%                                
Expense Example, with Redemption, 1 Year $ 72                                
Expense Example, with Redemption, 3 Years 224                                
Expense Example, with Redemption, 5 Years 390                                
Expense Example, with Redemption, 10 Years 871                                
Expense Example, No Redemption, 1 Year 72                                
Expense Example, No Redemption, 3 Years 224                                
Expense Example, No Redemption, 5 Years 390                                
Expense Example, No Redemption, 10 Years $ 871                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   7.88%                     3.47%       5.28%
FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | Fidelity Advisor Real Estate Income Fund - Class Z                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) 0.56%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.57%                                
Expense Example, with Redemption, 1 Year $ 58                                
Expense Example, with Redemption, 3 Years 183                                
Expense Example, with Redemption, 5 Years 318                                
Expense Example, with Redemption, 10 Years 714                                
Expense Example, No Redemption, 1 Year 58                                
Expense Example, No Redemption, 3 Years 183                                
Expense Example, No Redemption, 5 Years 318                                
Expense Example, No Redemption, 10 Years $ 714                                
Annual Return, Inception Date Oct. 02, 2018                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   8.03%                     3.59%   5.17% [30]    
FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Real Estate Income Fund /Fidelity Advisor® Real Estate Income Fund A, M, C, I, Z                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Real Estate Income Fund seeks higher than average income. As a secondary objective, the fund also seeks capital growth.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 35 of the prospectus and in the sales charge waiver appendix to the prospectus.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 24 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 24.00%                                
Expenses Deferred Charges [Text Block] 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.                                
Expense Breakpoint Discounts [Text] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 35 of the prospectus                                
Expense Breakpoint, Minimum Investment Required [Amount] $ 50,000                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in preferred and common stocks of real estate investment trusts (REITs); debt securities of real estate entities; and commercial and other mortgage-backed securities, with an emphasis on lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds). Normally investing at least 80% of assets in securities of companies principally engaged in the real estate industry and other real estate related investments. Investing in domestic and foreign issuers. Using fundamental analysis of each issuer's financial condition and industry position and market and economic conditions to select investments. Effective December 11, 2025, normally investing at least 80% of assets in debt and income-producing equity securities of companies principally engaged in the real estate industry and other real estate related investments. Debt securities are used by issuers to borrow money. The issuer usually pays a fixed, variable, or floating rate of interest, and must repay the amount borrowed, usually at the maturity of the security. Debt securities include corporate bonds, government securities (including Treasury securities), repurchase agreements, money market securities, mortgage and other asset-backed securities, loans and loan participations, and other securities, such as hybrids and synthetic securities, believed to have debt-like characteristics (e.g., securities classified as Tier 2 Regulatory capital, securities that rank above share capital in an insolvency waterfall, securities with maturity dates and non-cancellable interest payment structures).  Equity securities represent an ownership interest, or the right to acquire an ownership interest, in an issuer. Equity securities include common stocks (including depositary receipts evidencing ownership of common stock), preferred stocks and other preferred securities, convertible securities, rights and warrants, and other securities, such as hybrid securities and trust preferred securities, believed to have equity-like characteristics. Income-producing equity securities are equity securities that pay, or are expected to pay within the next three months, dividends or interest.  A real estate entity or real estate related investment is any company that is principally engaged in the real estate industry and includes commercial and residential mortgage-backed securities; debt securities of real estate entities; equity securities of entities whose primary assets are mortgage loans or commercial or residential mortgage-backed securities; REITs that either own properties or make construction loans and preferred stocks of REITs; real estate developers; companies with substantial real estate holdings; and other companies whose products and services are related to the real estate industry, such as building supply manufacturers, mortgage lenders, or mortgage servicing companies. The Adviser considers a company to be principally engaged in the real estate industry if (i) at least 50% of its assets, income, sales or profits are committed to, or derived from, the real estate industry, or (ii) a third party has given the company an industry or sector classification consistent with the real estate industry. 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.                                
Strategy Portfolio Concentration [Text] Normally investing at least 80% of assets in securities of companies principally engaged in the real estate industry and other real estate related investments.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index, a hypothetical composite of market indexes, and an additional index over various periods of time. The hypothetical composite of market indexes and additional index have 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 institutional.fidelity.com for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index, a hypothetical composite of market indexes, and an additional index over various periods of time.                                
Performance Availability Website Address [Text] institutional.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Bar Chart Narrative [Text Block] The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.                                
Bar Chart Does Not Reflect Sales Loads [Text] The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 3.52%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 16.74%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (25.56%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Does Reflect Sales Loads Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table One Class of after Tax Shown [Text] After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. 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. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. 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.                                
FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | After Taxes on Distributions | Fidelity Advisor Real Estate Income Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   1.61%                     0.86%       2.81%
FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | After Taxes on Distributions and Sales | Fidelity Advisor Real Estate Income Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   2.08%                     1.24%       2.85%
FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | ML038                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   ICE® BofA® US High Yield Constrained Index                              
Average Annual Return, Percent   8.20%                     4.03%       5.08%
FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | LB091                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Bloomberg U.S. Universal Bond Index                              
Average Annual Return, Percent   2.04%                     0.06%       1.73%
FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | F0663                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Fidelity Real Estate Income Composite Index℠                              
Average Annual Return, Percent   5.22%                     1.64%       3.85%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | Fidelity Small Cap Value Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) [31] 0.90%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.91%                                
Expense Example, with Redemption, 1 Year $ 93                                
Expense Example, with Redemption, 3 Years 290                                
Expense Example, with Redemption, 5 Years 504                                
Expense Example, with Redemption, 10 Years $ 1,120                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   9.29%                     11.41%       8.97%
Annual Return [Percent]     9.29% 17.74% (13.16%) 38.14% 11.18% 20.85% (15.04%) 12.26% 21.28% (1.60%)          
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Small Cap Value Fund /Fidelity® Small Cap Value Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Small Cap Value Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 96 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 96.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in securities of companies with small market capitalizations (which, for purposes of this fund, are those companies with market capitalizations similar to companies in the Russell 2000® Index or the S&P SmallCap 600® Index). Investing in securities of companies that Fidelity Management & Research Company LLC (FMR) believes are undervalued in the marketplace in relation to factors such as assets, sales, earnings, growth potential, or cash flow, or in relation to securities of other companies in the same industry (stocks of these companies are often called "value" 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 securities of value companies with small market capitalizations. The Adviser generally defines small market capitalization companies as those whose market capitalization is similar to the market capitalization of companies in the Russell 2000 ® Index or the S&P SmallCap 600 ® Index. Value companies are companies the Adviser believes are undervalued in the marketplace. The Adviser considers traditional and other measures of value, such as whether the company is included in a third-party value benchmark or classified as a value company by a third-party vendor, whether the company's free cash flow yield is above the equity market median, whether the company's enterprise value (the total value of a company's outstanding equity and debt) relative to earnings is below the equity market median, or whether the company's price-to-book (P/B) ratio or projected price-to-earnings (P/E) ratio is below the equity market median. An issuer may be determined to be a value company 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return (1.38%)                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Dec. 31, 2020                                
Highest Quarterly Return 33.14%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (32.11%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | After Taxes on Distributions | Fidelity Small Cap Value Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   7.56%                     9.90%       6.93%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | After Taxes on Distributions and Sales | Fidelity Small Cap Value Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   6.38%                     8.77%       6.68%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | RS015                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 2000® Value Index                              
Average Annual Return, Percent   8.05%                     7.29%       7.14%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | RS003                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 3000® Index                              
Average Annual Return, Percent   23.81%                     13.86%       12.55%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | Fidelity Small Cap Growth Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) [32] 0.87%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.88%                                
Expense Example, with Redemption, 1 Year $ 90                                
Expense Example, with Redemption, 3 Years 281                                
Expense Example, with Redemption, 5 Years 488                                
Expense Example, with Redemption, 10 Years $ 1,084                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   20.53%                     10.06%       12.27%
Annual Return [Percent]     20.53% 19.02% (25.34%) 10.55% 36.41% 36.31% (4.58%) 29.01% 10.97% 5.79%          
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Small Cap Growth Fund /Fidelity® Small Cap Growth Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Small Cap Growth Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 77 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 77.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in securities of companies with small market capitalizations (which, for purposes of this fund, are those companies with market capitalizations similar to companies in the Russell 2000® Index or the S&P SmallCap 600® Index). Investing in companies that Fidelity Management & Research Company LLC (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 securities of growth companies with small market capitalizations. The Adviser generally defines small market capitalization companies as those whose market capitalization is similar to the market capitalization of companies in the Russell 2000 ® Index or the S&P SmallCap 600 ® Index. 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return (1.14%)                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 26.65%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Dec. 31, 2018                                
Lowest Quarterly Return (22.73%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | After Taxes on Distributions | Fidelity Small Cap Growth Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   20.02%                     8.36%       10.58%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | After Taxes on Distributions and Sales | Fidelity Small Cap Growth Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   12.31%                     7.53%       9.63%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | RS003                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 3000® Index                              
Average Annual Return, Percent   23.81%                     13.86%       12.55%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | RS014                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 2000® Growth Index                              
Average Annual Return, Percent   15.15%                     6.86%       8.09%
FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | Fidelity Series Small Cap Opportunities Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.00%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.00%                                
Expenses (as a percentage of Assets) 0.00%                                
Expense Example, with Redemption, 1 Year $ 0                                
Expense Example, with Redemption, 3 Years 0                                
Expense Example, with Redemption, 5 Years 0                                
Expense Example, with Redemption, 10 Years $ 0                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   15.09%                     10.49%       9.75%
Annual Return [Percent]     15.09% 20.38% (17.88%) 23.67% 17.04% 29.91% (7.63%) 12.02% 15.18% (0.55%)          
FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund: Fidelity® Series Small Cap Opportunities Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Series Small Cap Opportunities Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 43 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 43.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in securities of companies with small market capitalizations . The Adviser generally defines small market capitalization companies as those whose market capitalization is similar to the market capitalization of companies in the Russell 2000 ® Index or the S&P SmallCap 600 ® Index. 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.   Investing in domestic and foreign issuers. Allocating the fund's assets across different market sectors (at present, communication services, consumer discretionary, consumer staples, energy, financials, health care, industrials, information technology, materials, real estate, and utilities), using different Fidelity managers. 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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. The performance shown does not reflect the impact of any fees paid at the fee-based account or plan level, if applicable. Visit www.fidelity.com for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return (0.14%)                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Dec. 31, 2020                                
Highest Quarterly Return 27.63%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (27.50%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | After Taxes on Distributions | Fidelity Series Small Cap Opportunities Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   12.51%                     7.83%       7.47%
FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | After Taxes on Distributions and Sales | Fidelity Series Small Cap Opportunities Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   10.41%                     7.62%       7.25%
FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | RS003                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 3000® Index                              
Average Annual Return, Percent   23.81%                     13.86%       12.55%
FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | RS002                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 2000® Index                              
Average Annual Return, Percent   11.54%                     7.40%       7.82%
FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | Fidelity Advisor Small Cap Growth Fund - Class A                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 5.75%                                
Maximum Deferred Sales Charge (as a percentage) [33] 0.00%                                
Management Fees (as a percentage of Assets) [34] 0.91%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 1.17%                                
Expense Example, with Redemption, 1 Year $ 687                                
Expense Example, with Redemption, 3 Years 925                                
Expense Example, with Redemption, 5 Years 1,182                                
Expense Example, with Redemption, 10 Years 1,914                                
Expense Example, No Redemption, 1 Year 687                                
Expense Example, No Redemption, 3 Years 925                                
Expense Example, No Redemption, 5 Years 1,182                                
Expense Example, No Redemption, 10 Years $ 1,914                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   13.27%                     8.46%       11.29%
Annual Return [Percent]     20.18% 18.72% (25.57%) 10.24% 36.02% 35.97% (4.87%) 28.64% 10.65% 5.48%          
FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | Fidelity Advisor Small Cap Growth Fund - Class M                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 3.50%                                
Maximum Deferred Sales Charge (as a percentage) [33] 0.00%                                
Management Fees (as a percentage of Assets) [34] 0.91%                                
Distribution and Service (12b-1) Fees 0.50%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 1.42%                                
Expense Example, with Redemption, 1 Year $ 489                                
Expense Example, with Redemption, 3 Years 784                                
Expense Example, with Redemption, 5 Years 1,099                                
Expense Example, with Redemption, 10 Years 1,992                                
Expense Example, No Redemption, 1 Year 489                                
Expense Example, No Redemption, 3 Years 784                                
Expense Example, No Redemption, 5 Years 1,099                                
Expense Example, No Redemption, 10 Years $ 1,992                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   15.70%                     8.70%       11.26%
FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | Fidelity Advisor Small Cap Growth Fund - Class C                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) [35] 1.00%                                
Management Fees (as a percentage of Assets) [34] 0.91%                                
Distribution and Service (12b-1) Fees 1.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 1.92%                                
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                
Expense Example, with Redemption, 1 Year $ 295                                
Expense Example, with Redemption, 3 Years 603                                
Expense Example, with Redemption, 5 Years 1,037                                
Expense Example, with Redemption, 10 Years 2,048                                
Expense Example, No Redemption, 1 Year 195                                
Expense Example, No Redemption, 3 Years 603                                
Expense Example, No Redemption, 5 Years 1,037                                
Expense Example, No Redemption, 10 Years $ 2,048                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   18.26%                     8.92%       11.27%
FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | Fidelity Advisor Small Cap Growth Fund - Class I                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) [34] 0.91%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.92%                                
Expense Example, with Redemption, 1 Year $ 94                                
Expense Example, with Redemption, 3 Years 293                                
Expense Example, with Redemption, 5 Years 509                                
Expense Example, with Redemption, 10 Years 1,131                                
Expense Example, No Redemption, 1 Year 94                                
Expense Example, No Redemption, 3 Years 293                                
Expense Example, No Redemption, 5 Years 509                                
Expense Example, No Redemption, 10 Years $ 1,131                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   20.49%                     10.03%       12.25%
FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | Fidelity Advisor Small Cap Growth Fund - Class Z                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) [34] 0.79%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Expenses (as a percentage of Assets) 0.80%                                
Expense Example, with Redemption, 1 Year $ 82                                
Expense Example, with Redemption, 3 Years 255                                
Expense Example, with Redemption, 5 Years 444                                
Expense Example, with Redemption, 10 Years 990                                
Expense Example, No Redemption, 1 Year 82                                
Expense Example, No Redemption, 3 Years 255                                
Expense Example, No Redemption, 5 Years 444                                
Expense Example, No Redemption, 10 Years $ 990                                
Annual Return, Inception Date Feb. 01, 2017                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   20.64%                     10.18%     13.04% [36]  
FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Small Cap Growth Fund /Fidelity Advisor® Small Cap Growth Fund A, M, C, I, Z                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Small Cap Growth Fund seeks capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 33 of the prospectus and in the sales charge waiver appendix to the prospectus.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 77 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 77.00%                                
Expenses Deferred Charges [Text Block] 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.                                
Expense Breakpoint Discounts [Text] 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 ® funds. More information about these and other discounts is available from your investment professional and in the "Fund Distribution" section beginning on page 33 of the prospectus                                
Expense Breakpoint, Minimum Investment Required [Amount] $ 50,000                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in common stocks. Normally investing at least 80% of assets in securities of companies with small market capitalizations (which, for purposes of this fund, are those companies with market capitalizations similar to companies in the Russell 2000® Index or the S&P SmallCap 600® Index). Investing in companies that Fidelity Management & Research Company LLC (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 securities of growth companies with small market capitalizations. The Adviser generally defines small market capitalization companies as those whose market capitalization is similar to the market capitalization of companies in the Russell 2000 ® Index or the S&P SmallCap 600 ® Index. 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares 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 institutional.fidelity.com for more recent performance information.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index and an additional index over various periods of time.                                
Performance Availability Website Address [Text] institutional.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Bar Chart Narrative [Text Block] The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.                                
Bar Chart Does Not Reflect Sales Loads [Text] The returns in the bar chart do not reflect any applicable sales charges; if sales charges were reflected, returns would be lower than those shown.                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return (1.26%)                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 26.62%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Dec. 31, 2018                                
Lowest Quarterly Return (22.81%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Does Reflect Sales Loads Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges.                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table One Class of after Tax Shown [Text] After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary.                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative Unlike the returns in the bar chart, the returns in the table reflect the maximum applicable sales charges. 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. After-tax returns for Class A are shown in the table below and after-tax returns for other classes will vary. 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.                                
FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | After Taxes on Distributions | Fidelity Advisor Small Cap Growth Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   12.86%                     6.72%       9.57%
FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | After Taxes on Distributions and Sales | Fidelity Advisor Small Cap Growth Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   8.00%                     6.23%       8.77%
FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | RS003                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 3000® Index                              
Average Annual Return, Percent   23.81%                     13.86%       12.55%
FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | RS014                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 2000® Growth Index                              
Average Annual Return, Percent   15.15%                     6.86%       8.09%
FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | Fidelity Growth & Income Portfolio                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.53%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.00%                                
Expenses (as a percentage of Assets) 0.53%                                
Expense Example, with Redemption, 1 Year $ 54                                
Expense Example, with Redemption, 3 Years 170                                
Expense Example, with Redemption, 5 Years 296                                
Expense Example, with Redemption, 10 Years $ 665                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   22.05%                     13.32%       11.38%
Annual Return [Percent]     22.05% 18.61% (5.00%) 25.85% 7.99% 30.21% (8.91%) 16.88% 16.06% (2.28%)          
FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Growth & Income Portfolio /Fidelity® Growth & Income Portfolio                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Growth & Income Portfolio seeks high total return through a combination of current income and capital appreciation.                                
Expense Heading [Optional Text] Fee Table                                
Expense Narrative [Text Block] 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.                                
Shareholder Fees Caption [Optional Text] Shareholder fees                                
Shareholder Fee, Other $ 0                                
Operating Expenses Caption [Optional Text] Annual Operating Expenses                                
Portfolio Turnover [Heading] Portfolio Turnover                                
Portfolio Turnover [Text Block] 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 15 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 15.00%                                
Expense Example Narrative [Text Block] 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:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing a majority of assets in common stocks with a focus on those that pay current dividends and show potential for capital appreciation. Potentially investing in bonds, including lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), as well as stocks that are not currently paying dividends, but offer prospects for future income or capital appreciation. 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. Effective December 11, 2025, normally investing at least 80% of assets in a combination of securities of growth companies and income-producing securities. 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. Income-producing securities are securities that pay, or are expected to pay within the next three months, dividends or interest. 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.                                
Bar Chart and Performance Table [Heading] Performance                                
Performance Narrative [Text Block] 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 the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index over various periods of time. The index description appears 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.                                
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of the fund's shares from year to year and compares the performance of the fund's shares to the performance of a securities market index over various periods of time.                                
Performance Availability Website Address [Text] www.fidelity.com                                
Performance Past Does Not Indicate Future [Text] Past performance (before and after taxes) is not an indication of future performance.                                
Bar Chart [Heading] Year-by-Year Returns                                
Year to Date Return, Label [Optional Text]    Year-to-Date Return                                
Bar Chart, Year to Date Return, Date Jun. 30, 2025                                
Bar Chart, Year to Date Return 10.79%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Dec. 31, 2020                                
Highest Quarterly Return 17.26%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (23.33%)                                
Performance Table Heading Average Annual Returns                                
Performance Table Uses Highest Federal Rate 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.                                
Performance Table Not Relevant to Tax Deferred 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).                                
Performance Table Explanation after Tax Higher 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.                                
Performance Table Narrative 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.                                
FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | After Taxes on Distributions | Fidelity Growth & Income Portfolio                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   20.10%                     12.00%       10.42%
FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | After Taxes on Distributions and Sales | Fidelity Growth & Income Portfolio                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   14.33%                     10.40%       9.19%
FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | SP001                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   S&P 500® Index                              
Average Annual Return, Percent   25.02%                     14.53%       13.10%
Document Type 485BPOS                                
Registrant Name Fidelity Securities Fund                                
[1]
A 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.
[2]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the Russell 2000® Value Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[3]
B On Class C shares redeemed less than one year after purchase.
[4]
A From October 2, 2018 .
[5]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the Nasdaq Composite Index®. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[6]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the Russell 1000® Growth Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[7]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the Russell 1000® Value Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[8]
A From June 13, 2019 .
[9]
A Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses. For the period, acquired fund fees and expenses are less than 0.01% and are included in other expenses.
[10]
A From May 25, 2017 .
[11]
A 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.
[12]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the Nasdaq Composite Index®. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[13]
B On Class C shares redeemed less than one year after purchase.
[14]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the Nasdaq Composite Index®. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[15]
A 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.
[16]
B On Class C shares redeemed less than one year after purchase.
[17]
A From May 25, 2017 .
[18]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the S&P 500® Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[19]
B Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.
[20]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the S&P 500® Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[21]
B Differs from the ratios of expenses to average net assets in the Financial Highlights section of the prospectus because of acquired fund fees and expenses.
[22]
A 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.
[23]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the Russell 1000® Growth Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[24]
B On Class C shares redeemed less than one year after purchase.
[25]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the Russell 1000® Growth Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[26]
A 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.
[27]
B On Class C shares redeemed less than one year after purchase.
[28]
A 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.
[29]
B On Class C shares redeemed less than one year after purchase.
[30]
A From October 2, 2018 .
[31]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the Russell 2000® Value Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[32]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the Russell 2000® Growth Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[33]
A 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.
[34]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.20% based on the performance of the fund or a designated class of the fund relative to that of the Russell 2000® Growth Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[35]
B On Class C shares redeemed less than one year after purchase.
[36]
A From February 1, 2017 .