v3.26.3
Risk/Return Detail Data - FidelityOTCPortfolio-KPRO - USD ($)
 12 Months Ended 24 Months Ended 60 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
Sep. 29, 2026
Sep. 29, 2026
Dec. 31, 2025
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
Sep. 29, 2026
Sep. 29, 2026
Sep. 29, 2026
Sep. 29, 2026
Sep. 29, 2026
Sep. 29, 2026
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] 0.78%                                  
Distribution and Service (12b-1) Fees 0.25%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 1.04%                                  
Expense Example, with Redemption, 1 Year $ 675                                  
Expense Example, with Redemption, 3 Years 887                                  
Expense Example, with Redemption, 5 Years 1,116                                  
Expense Example, with Redemption, 10 Years 1,773                                  
Expense Example, No Redemption, 1 Year 675                                  
Expense Example, No Redemption, 3 Years 887                                  
Expense Example, No Redemption, 5 Years 1,116                                  
Expense Example, No Redemption, 10 Years $ 1,773                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   1.65%                       9.21%       9.07%
Annual Return [Percent]     7.85% 9.00% 17.44% (13.38%) 37.83% 10.83% 20.47% (15.21%) 11.98% 21.03%            
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] 0.78%                                  
Distribution and Service (12b-1) Fees 0.50%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 1.29%                                  
Expense Example, with Redemption, 1 Year $ 477                                  
Expense Example, with Redemption, 3 Years 745                                  
Expense Example, with Redemption, 5 Years 1,033                                  
Expense Example, with Redemption, 10 Years 1,852                                  
Expense Example, No Redemption, 1 Year 477                                  
Expense Example, No Redemption, 3 Years 745                                  
Expense Example, No Redemption, 5 Years 1,033                                  
Expense Example, No Redemption, 10 Years $ 1,852                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   3.87%                       9.46%       9.07%
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] 0.78%                                  
Distribution and Service (12b-1) Fees 1.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
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 1,908                                  
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 $ 1,908                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   6.10%                       9.68%       9.06%
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] 0.78%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
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                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   8.12%                       10.79%       10.01%
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] 0.67%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 0.67%                                  
Expense Example, with Redemption, 1 Year $ 68                                  
Expense Example, with Redemption, 3 Years 214                                  
Expense Example, with Redemption, 5 Years 373                                  
Expense Example, with Redemption, 10 Years 835                                  
Expense Example, No Redemption, 1 Year 68                                  
Expense Example, No Redemption, 3 Years 214                                  
Expense Example, No Redemption, 5 Years 373                                  
Expense Example, No Redemption, 10 Years $ 835                                  
Annual Return, Inception Date Oct. 02, 2018                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   8.28%                       10.93%   9.27% [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 134 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 134.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 28.54%                                  
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   (0.65%)                       7.27%       7.06%
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   2.61%                       6.92%       6.84%
FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | RS003                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 3000® Index                                
Average Annual Return, Percent   17.15%                       13.15%       14.29%
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   12.59%                       8.88%       9.27%
FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | Fidelity OTC Portfolio - Class K                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) [5] 0.71%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 0.71%                                  
Expense Example, with Redemption, 1 Year $ 73                                  
Expense Example, with Redemption, 3 Years 227                                  
Expense Example, with Redemption, 5 Years 395                                  
Expense Example, with Redemption, 10 Years $ 883                                  
Average Annual Return, Label [Optional Text]   Class K                                
Average Annual Return, Percent   22.36%                       14.88%       18.98%
Annual Return [Percent]     22.36% 34.66% 42.92% (32.12%) 25.15% 46.88% 39.38% (3.10%) 38.75% 3.23%            
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 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. 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, 2026                                  
Bar Chart, Year to Date Return 28.01%                                  
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 | SP001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   S&P 500® Index                                
Average Annual Return, Percent   17.88%                       14.42%       14.82%
FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | NS004                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Nasdaq Composite Index®                                
Average Annual Return, Percent   21.14%                       13.35%       17.66%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | Fidelity Blue Chip Growth Fund                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) [6] 0.72%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
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                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   19.91%                       14.50%       19.53%
Annual Return [Percent]     19.91% 39.70% 55.60% (38.46%) 22.71% 62.23% 33.44% 1.07% 36.06% 1.59%            
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 37 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 37.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 17.40%                                  
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   19.35%                       13.50%       18.32%
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   12.15%                       11.41%       16.32%
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   18.56%                       15.32%       18.13%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | RS001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 1000® Index                                
Average Annual Return, Percent   17.37%                       13.59%       14.59%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | Fidelity Blue Chip Value Fund                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) [7] 0.43%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.06%                                  
Expenses (as a percentage of Assets) 0.49%                                  
Expense Example, with Redemption, 1 Year $ 50                                  
Expense Example, with Redemption, 3 Years 157                                  
Expense Example, with Redemption, 5 Years 274                                  
Expense Example, with Redemption, 10 Years $ 616                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   11.14%                       9.63%       7.92%
Annual Return [Percent]     11.14% 4.84% 7.08% 1.52% 25.04% (4.72%) 21.71% (8.65%) 14.87% 11.19%            
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 97 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 97.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 20.84%                                  
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   10.14%                       8.60%       7.23%
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   6.90%                       7.50%       6.33%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | RS001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 1000® Index                                
Average Annual Return, Percent   17.37%                       13.59%       14.59%
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   15.91%                       11.33%       10.53%
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   20.37%                       14.35% 20.39% [8]      
Annual Return [Percent]     20.37% 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 69 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 69.00%                                  
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. 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, 2026                                  
Bar Chart, Year to Date Return 25.12%                                  
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 | SP001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   S&P 500® Index                                
Average Annual Return, Percent   17.88%                       14.42% 15.84%      
FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | NS004                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Nasdaq Composite Index®                                
Average Annual Return, Percent   21.14%                       13.35% 18.97%      
FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | Fidelity Leveraged Company Stock Fund                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) 0.66%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.67%                                  
Expense Example, with Redemption, 1 Year $ 68                                  
Expense Example, with Redemption, 3 Years 214                                  
Expense Example, with Redemption, 5 Years 373                                  
Expense Example, with Redemption, 10 Years $ 835                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   20.32%                       13.26%       13.27%
Annual Return [Percent]     20.32% 26.69% 26.11% (23.14%) 26.16% 26.74% 35.60% (16.42%) 21.02% 7.26%            
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 38 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 38.00%                                  
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 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). 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 24.40%                                  
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   19.01%                       10.39%       10.33%
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   12.96%                       9.90%       9.91%
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   18.31%                       12.65%       10.60%
FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | RS006                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell Midcap® Index                                
Average Annual Return, Percent   10.60%                       8.67%       11.01%
FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | RS003                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 3000® Index                                
Average Annual Return, Percent   17.15%                       13.15%       14.29%
FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio | Fidelity Growth & Income Portfolio - Class K                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) 0.44%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 0.44%                                  
Expense Example, with Redemption, 1 Year $ 45                                  
Expense Example, with Redemption, 3 Years 141                                  
Expense Example, with Redemption, 5 Years 246                                  
Expense Example, with Redemption, 10 Years $ 555                                  
Average Annual Return, Label [Optional Text]   Class K                                
Average Annual Return, Percent   21.74%                       16.16%       13.96%
Annual Return [Percent]     21.74% 22.14% 18.72% (4.90%) 25.96% 8.09% 30.37% (8.85%) 17.03% 16.22%            
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 27 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 27.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 9.10%                                  
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   17.88%                       14.42%       14.82%
FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | Fidelity Real Estate Income Fund                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) 0.64%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
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]   Return Before Taxes                                
Average Annual Return, Percent   7.17%                       5.14%       5.82%
Annual Return [Percent]     7.17% 7.93% 9.32% (14.54%) 18.90% (1.08%) 17.91% (0.64%) 7.30% 10.21%            
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.                                  
Objective, Secondary [Text Block] 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 16 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 16.00%                                  
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 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. 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). 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 4.21%                                  
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   5.27%                       3.51%       3.98%
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   4.34%                       3.35%       3.82%
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   5.81%                       2.11%       4.01%
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   8.50%                       4.50%       6.44%
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   7.58%                       0.06%       2.44%
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): 0.00%                                  
Expenses (as a percentage of Assets) 0.60%                                  
Expense Example, with Redemption, 1 Year $ 61                                  
Expense Example, with Redemption, 3 Years 192                                  
Expense Example, with Redemption, 5 Years 335                                  
Expense Example, with Redemption, 10 Years $ 750                                  
Annual Return, Inception Date May 25, 2017                                  
Average Annual Return, Label [Optional Text]   Fidelity® Small Cap Growth K6 Fund                                
Average Annual Return, Percent   11.38%                       5.99%     12.60% [9]  
Annual Return [Percent]     11.38% 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 101 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 101.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 27.90%                                  
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   17.15%                       13.15%     14.12%  
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   13.01%                       3.18%     8.96%  
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) [10] 0.00%                                  
Management Fees (as a percentage of Assets) [11] 0.81%                                  
Distribution and Service (12b-1) Fees 0.25%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 1.07%                                  
Expense Example, with Redemption, 1 Year $ 678                                  
Expense Example, with Redemption, 3 Years 896                                  
Expense Example, with Redemption, 5 Years 1,131                                  
Expense Example, with Redemption, 10 Years 1,806                                  
Expense Example, No Redemption, 1 Year 678                                  
Expense Example, No Redemption, 3 Years 896                                  
Expense Example, No Redemption, 5 Years 1,131                                  
Expense Example, No Redemption, 10 Years $ 1,806                                  
Annual Return, Inception Date Oct. 08, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   14.92%                     19.18% [12]          
Annual Return [Percent]     21.93%                              
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) [10] 0.00%                                  
Management Fees (as a percentage of Assets) [11] 0.81%                                  
Distribution and Service (12b-1) Fees 0.50%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 1.31%                                  
Expense Example, with Redemption, 1 Year $ 479                                  
Expense Example, with Redemption, 3 Years 751                                  
Expense Example, with Redemption, 5 Years 1,043                                  
Expense Example, with Redemption, 10 Years 1,874                                  
Expense Example, No Redemption, 1 Year 479                                  
Expense Example, No Redemption, 3 Years 751                                  
Expense Example, No Redemption, 5 Years 1,043                                  
Expense Example, No Redemption, 10 Years $ 1,874                                  
Annual Return, Inception Date Oct. 08, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   17.38%                     21.19% [13]          
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) [14] 1.00%                                  
Management Fees (as a percentage of Assets) [11] 0.81%                                  
Distribution and Service (12b-1) Fees 1.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 1.81%                                  
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                  
Expense Example, with Redemption, 1 Year $ 284                                  
Expense Example, with Redemption, 3 Years 569                                  
Expense Example, with Redemption, 5 Years 980                                  
Expense Example, with Redemption, 10 Years 1,932                                  
Expense Example, No Redemption, 1 Year 184                                  
Expense Example, No Redemption, 3 Years 569                                  
Expense Example, No Redemption, 5 Years 980                                  
Expense Example, No Redemption, 10 Years $ 1,932                                  
Annual Return, Inception Date Oct. 08, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   20.06%                     24.14% [15]          
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) [11] 0.80%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.81%                                  
Expense Example, with Redemption, 1 Year $ 83                                  
Expense Example, with Redemption, 3 Years 259                                  
Expense Example, with Redemption, 5 Years 450                                  
Expense Example, with Redemption, 10 Years 1,002                                  
Expense Example, No Redemption, 1 Year 83                                  
Expense Example, No Redemption, 3 Years 259                                  
Expense Example, No Redemption, 5 Years 450                                  
Expense Example, No Redemption, 10 Years $ 1,002                                  
Annual Return, Inception Date Oct. 08, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   22.24%                     25.35% [16]          
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) [11] 0.70%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.71%                                  
Expense Example, with Redemption, 1 Year $ 73                                  
Expense Example, with Redemption, 3 Years 227                                  
Expense Example, with Redemption, 5 Years 395                                  
Expense Example, with Redemption, 10 Years 883                                  
Expense Example, No Redemption, 1 Year 73                                  
Expense Example, No Redemption, 3 Years 227                                  
Expense Example, No Redemption, 5 Years 395                                  
Expense Example, No Redemption, 10 Years $ 883                                  
Annual Return, Inception Date Oct. 08, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   22.34%                     25.48% [17]          
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 64 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 64.00%                                  
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. 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 performance of the fund's shares over the past 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 performance of the fund's shares over the past 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, 2026                                  
Bar Chart, Year to Date Return 27.75%                                  
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                  
Highest Quarterly Return, Date Jun. 30, 2025                                  
Highest Quarterly Return 16.11%                                  
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                  
Lowest Quarterly Return, Date Mar. 31, 2025                                  
Lowest Quarterly Return (11.30%)                                  
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.                                  
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | After Taxes on Distributions | Fidelity Advisor OTC Fund - Class A                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                                
Average Annual Return, Percent   12.81%                     16.70% [12]          
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | After Taxes on Distributions and Sales | Fidelity Advisor OTC 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   10.21%                     14.52% [12]          
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | SP001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   S&P 500® Index                                
Average Annual Return, Percent   17.88%                     16.70%          
FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | NS004                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Nasdaq Composite Index®                                
Average Annual Return, Percent   21.14%                     22.89%          
FidelitySAIRealEstateIncomeFund-PRO | Fidelity SAI Real Estate Income Fund | Fidelity SAI Real Estate Income Fund                                    
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): [18] 0.02%                                  
Expenses (as a percentage of Assets) 0.55%                                  
Expense Example, with Redemption, 1 Year $ 56                                  
Expense Example, with Redemption, 3 Years $ 176                                  
FidelitySAIRealEstateIncomeFund-PRO | Fidelity SAI Real Estate Income Fund                                    
Prospectus Line Items                                    
Risk/Return [Heading] Fund Summary Fund: Fidelity® SAI Real Estate Income Fund                                  
Objective [Heading] Investment Objective                                  
Objective, Primary [Text Block] Fidelity® SAI Real Estate Income Fund seeks higher than average income.                                  
Objective, Secondary [Text Block] 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. For the period from April 21, 2026 to July 31, 2026, the fund's portfolio turnover rate was 6 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 6.00%                                  
Other Expenses, New Fund, Based on Estimates [Text] Based on estimated amounts for the current fiscal year.                                  
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 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. 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). 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.                                  
Bar Chart and Performance Table [Heading] Performance                                  
Performance Narrative [Text Block] Performance history will be available for the fund after the fund has been in operation for one calendar year.                                  
Performance One Year or Less [Text] Performance history will be available for the fund after the fund has been in operation for one calendar year.                                  
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   8.92%                       5.77%       6.11%
Annual Return [Percent]     8.92% 9.87% 8.29% (11.79%) 15.78% 0.56% 16.01% 0.67% 7.44% 8.31%            
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.                                  
Objective, Secondary [Text Block] 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 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 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. 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). 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 1.71%                                  
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   6.57%                       3.36%       3.71%
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   5.35%                       3.50%       3.82%
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   8.50%                       4.50%       6.44%
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   7.58%                       0.06%       2.44%
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   7.11%                       1.82%       3.82%
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) [19] 0.00%                                  
Management Fees (as a percentage of Assets) 0.55%                                  
Distribution and Service (12b-1) Fees 0.25%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.81%                                  
Expense Example, with Redemption, 1 Year $ 653                                  
Expense Example, with Redemption, 3 Years 819                                  
Expense Example, with Redemption, 5 Years 999                                  
Expense Example, with Redemption, 10 Years 1,519                                  
Expense Example, No Redemption, 1 Year 653                                  
Expense Example, No Redemption, 3 Years 819                                  
Expense Example, No Redemption, 5 Years 999                                  
Expense Example, No Redemption, 10 Years $ 1,519                                  
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) [19] 0.00%                                  
Management Fees (as a percentage of Assets) 0.55%                                  
Distribution and Service (12b-1) Fees 0.50%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 1.06%                                  
Expense Example, with Redemption, 1 Year $ 454                                  
Expense Example, with Redemption, 3 Years 675                                  
Expense Example, with Redemption, 5 Years 914                                  
Expense Example, with Redemption, 10 Years 1,599                                  
Expense Example, No Redemption, 1 Year 454                                  
Expense Example, No Redemption, 3 Years 675                                  
Expense Example, No Redemption, 5 Years 914                                  
Expense Example, No Redemption, 10 Years $ 1,599                                  
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) [20] 1.00%                                  
Management Fees (as a percentage of Assets) 0.55%                                  
Distribution and Service (12b-1) Fees 1.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 1.56%                                  
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                  
Expense Example, with Redemption, 1 Year $ 259                                  
Expense Example, with Redemption, 3 Years 493                                  
Expense Example, with Redemption, 5 Years 850                                  
Expense Example, with Redemption, 10 Years 1,655                                  
Expense Example, No Redemption, 1 Year 159                                  
Expense Example, No Redemption, 3 Years 493                                  
Expense Example, No Redemption, 5 Years 850                                  
Expense Example, No Redemption, 10 Years $ 1,655                                  
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) 0.55%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
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                                  
Expense Example, No Redemption, 1 Year 57                                  
Expense Example, No Redemption, 3 Years 179                                  
Expense Example, No Redemption, 5 Years 313                                  
Expense Example, No Redemption, 10 Years $ 701                                  
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) 0.44%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 0.44%                                  
Expense Example, with Redemption, 1 Year $ 45                                  
Expense Example, with Redemption, 3 Years 141                                  
Expense Example, with Redemption, 5 Years 246                                  
Expense Example, with Redemption, 10 Years 555                                  
Expense Example, No Redemption, 1 Year 45                                  
Expense Example, No Redemption, 3 Years 141                                  
Expense Example, No Redemption, 5 Years 246                                  
Expense Example, No Redemption, 10 Years $ 555                                  
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 27 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 27.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 9.06%                                  
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   17.88%                       14.42%       14.82%
FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | Fidelity OTC Portfolio                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) [21] 0.78%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 0.78%                                  
Expense Example, with Redemption, 1 Year $ 80                                  
Expense Example, with Redemption, 3 Years 249                                  
Expense Example, with Redemption, 5 Years 433                                  
Expense Example, with Redemption, 10 Years $ 966                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   22.30%                       14.79%       18.87%
Annual Return [Percent]     22.30% 34.61% 42.64% (32.12%) 25.04% 46.79% 39.22% (3.21%) 38.59% 3.11%            
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 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. 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, 2026                                  
Bar Chart, Year to Date Return 27.92%                                  
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   20.08%                       12.73%       16.97%
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   14.66%                       11.34%       15.45%
FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | SP001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   S&P 500® Index                                
Average Annual Return, Percent   17.88%                       14.42%       14.82%
FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | NS004                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Nasdaq Composite Index®                                
Average Annual Return, Percent   21.14%                       13.35%       17.66%
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   20.30%                       15.29%       20.40%
Annual Return [Percent]     20.30% 39.66% 57.42% (37.24%) 22.71% 63.23% 33.27% 4.65% 35.94% 1.58%            
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 51 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 51.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 18.54%                                  
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   19.18%                       13.07%       17.15%
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   12.69%                       11.59%       16.03%
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   18.56%                       15.32%       18.13%
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   17.37%                       13.59%       14.59%
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   21.33%                       14.81%     20.37% [22]  
Annual Return [Percent]     21.33% 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 33 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 33.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 17.20%                                  
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   18.56%                       15.32%     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   17.37%                       13.59%     14.49%  
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-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) [23] 0.00%                                  
Management Fees (as a percentage of Assets) [24] 0.76%                                  
Distribution and Service (12b-1) Fees 0.25%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 1.01%                                  
Expense Example, with Redemption, 1 Year $ 672                                  
Expense Example, with Redemption, 3 Years 878                                  
Expense Example, with Redemption, 5 Years 1,101                                  
Expense Example, with Redemption, 10 Years 1,740                                  
Expense Example, No Redemption, 1 Year 672                                  
Expense Example, No Redemption, 3 Years 878                                  
Expense Example, No Redemption, 5 Years 1,101                                  
Expense Example, No Redemption, 10 Years $ 1,740                                  
Annual Return, Inception Date Oct. 08, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   12.68%                     17.53% [25]          
Annual Return [Percent]     19.55%                              
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-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) [23] 0.00%                                  
Management Fees (as a percentage of Assets) [24] 0.76%                                  
Distribution and Service (12b-1) Fees 0.50%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 1.26%                                  
Expense Example, with Redemption, 1 Year $ 474                                  
Expense Example, with Redemption, 3 Years 736                                  
Expense Example, with Redemption, 5 Years 1,017                                  
Expense Example, with Redemption, 10 Years 1,819                                  
Expense Example, No Redemption, 1 Year 474                                  
Expense Example, No Redemption, 3 Years 736                                  
Expense Example, No Redemption, 5 Years 1,017                                  
Expense Example, No Redemption, 10 Years $ 1,819                                  
Annual Return, Inception Date Oct. 08, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   15.08%                     19.51% [26]          
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-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) [27] 1.00%                                  
Management Fees (as a percentage of Assets) [24] 0.76%                                  
Distribution and Service (12b-1) Fees 1.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 1.76%                                  
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                  
Expense Example, with Redemption, 1 Year $ 279                                  
Expense Example, with Redemption, 3 Years 554                                  
Expense Example, with Redemption, 5 Years 954                                  
Expense Example, with Redemption, 10 Years 1,875                                  
Expense Example, No Redemption, 1 Year 179                                  
Expense Example, No Redemption, 3 Years 554                                  
Expense Example, No Redemption, 5 Years 954                                  
Expense Example, No Redemption, 10 Years $ 1,875                                  
Annual Return, Inception Date Oct. 08, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   17.65%                     22.40% [28]          
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-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) [24] 0.76%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 0.76%                                  
Expense Example, with Redemption, 1 Year $ 78                                  
Expense Example, with Redemption, 3 Years 243                                  
Expense Example, with Redemption, 5 Years 422                                  
Expense Example, with Redemption, 10 Years 942                                  
Expense Example, No Redemption, 1 Year 78                                  
Expense Example, No Redemption, 3 Years 243                                  
Expense Example, No Redemption, 5 Years 422                                  
Expense Example, No Redemption, 10 Years $ 942                                  
Annual Return, Inception Date Oct. 08, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   19.85%                     23.63% [29]          
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-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) [24] 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                                  
Expense Example, No Redemption, 1 Year 66                                  
Expense Example, No Redemption, 3 Years 208                                  
Expense Example, No Redemption, 5 Years 362                                  
Expense Example, No Redemption, 10 Years $ 810                                  
Annual Return, Inception Date Oct. 08, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   19.99%                     23.77% [30]          
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-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 41 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 37% of the average value of its portfolio.                                  
Portfolio Turnover, Rate 37.00%                                  
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 41 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 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. 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.                                  
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 performance of the fund's shares over the past 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 performance of the fund's shares over the past 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, 2026                                  
Bar Chart, Year to Date Return 17.23%                                  
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                  
Highest Quarterly Return, Date Jun. 30, 2025                                  
Highest Quarterly Return 19.74%                                  
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                  
Lowest Quarterly Return, Date Mar. 31, 2025                                  
Lowest Quarterly Return (13.12%)                                  
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.                                  
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | After Taxes on Distributions | Fidelity Advisor Blue Chip Growth Fund - Class A                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                                
Average Annual Return, Percent   12.15%                     16.85% [25]          
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | After Taxes on Distributions and Sales | Fidelity Advisor Blue Chip 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   7.85%                     13.36% [25]          
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | RS004                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 1000® Growth Index                                
Average Annual Return, Percent   18.56%                     21.11%          
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | RS001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 1000® Index                                
Average Annual Return, Percent   17.37%                     16.61%          
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | Fidelity Advisor Blue Chip 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) [31] 0.00%                                  
Management Fees (as a percentage of Assets) [32] 0.49%                                  
Distribution and Service (12b-1) Fees 0.25%                                  
Other Expenses (as a percentage of Assets): 0.06%                                  
Expenses (as a percentage of Assets) 0.80%                                  
Expense Example, with Redemption, 1 Year $ 652                                  
Expense Example, with Redemption, 3 Years 816                                  
Expense Example, with Redemption, 5 Years 994                                  
Expense Example, with Redemption, 10 Years 1,508                                  
Expense Example, No Redemption, 1 Year 652                                  
Expense Example, No Redemption, 3 Years 816                                  
Expense Example, No Redemption, 5 Years 994                                  
Expense Example, No Redemption, 10 Years $ 1,508                                  
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | Fidelity Advisor Blue Chip 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) [31] 0.00%                                  
Management Fees (as a percentage of Assets) [32] 0.49%                                  
Distribution and Service (12b-1) Fees 0.50%                                  
Other Expenses (as a percentage of Assets): 0.06%                                  
Expenses (as a percentage of Assets) 1.05%                                  
Expense Example, with Redemption, 1 Year $ 453                                  
Expense Example, with Redemption, 3 Years 672                                  
Expense Example, with Redemption, 5 Years 909                                  
Expense Example, with Redemption, 10 Years 1,588                                  
Expense Example, No Redemption, 1 Year 453                                  
Expense Example, No Redemption, 3 Years 672                                  
Expense Example, No Redemption, 5 Years 909                                  
Expense Example, No Redemption, 10 Years $ 1,588                                  
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | Fidelity Advisor Blue Chip 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) [33] 1.00%                                  
Management Fees (as a percentage of Assets) [32] 0.49%                                  
Distribution and Service (12b-1) Fees 1.00%                                  
Other Expenses (as a percentage of Assets): 0.06%                                  
Expenses (as a percentage of Assets) 1.55%                                  
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                  
Expense Example, with Redemption, 1 Year $ 258                                  
Expense Example, with Redemption, 3 Years 490                                  
Expense Example, with Redemption, 5 Years 845                                  
Expense Example, with Redemption, 10 Years 1,643                                  
Expense Example, No Redemption, 1 Year 158                                  
Expense Example, No Redemption, 3 Years 490                                  
Expense Example, No Redemption, 5 Years 845                                  
Expense Example, No Redemption, 10 Years $ 1,643                                  
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | Fidelity Advisor Blue Chip 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) [32] 0.44%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.06%                                  
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                                  
Expense Example, No Redemption, 1 Year 51                                  
Expense Example, No Redemption, 3 Years 160                                  
Expense Example, No Redemption, 5 Years 280                                  
Expense Example, No Redemption, 10 Years $ 628                                  
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | Fidelity Advisor Blue Chip 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) [32] 0.37%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.05%                                  
Expenses (as a percentage of Assets) 0.42%                                  
Expense Example, with Redemption, 1 Year $ 43                                  
Expense Example, with Redemption, 3 Years 135                                  
Expense Example, with Redemption, 5 Years 235                                  
Expense Example, with Redemption, 10 Years 530                                  
Expense Example, No Redemption, 1 Year 43                                  
Expense Example, No Redemption, 3 Years 135                                  
Expense Example, No Redemption, 5 Years 235                                  
Expense Example, No Redemption, 10 Years $ 530                                  
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund                                    
Prospectus Line Items                                    
Risk/Return [Heading] Fund Summary Fund/Class: Fidelity® Blue Chip Value Fund/Fidelity Advisor® Blue Chip Value Fund A, M, C, I, Z                                   
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. 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 41 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 97% of the average value of its portfolio.                                  
Portfolio Turnover, Rate 97.00%                                  
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 41 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 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. 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.                                  
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 Value 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 Value 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 Value 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 Value 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 Value 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 Value 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, 2026                                  
Bar Chart, Year to Date Return 20.84%                                  
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-AMCIZPRO | Fidelity Blue Chip Value Fund | RS001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 1000® Index                                
Average Annual Return, Percent   17.37%                       13.59%       14.59%
FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | RS005                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 1000® Value Index                                
Average Annual Return, Percent   15.91%                       11.33%       10.53%
FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund | Fidelity Dividend Growth Fund - Class K                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) [34] 0.61%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Acquired Fund Fees and Expenses 0.19%                                  
Expenses (as a percentage of Assets) [35] 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   22.56%                       15.88%       12.78%
Annual Return [Percent]     22.56% 27.57% 17.97% (11.63%) 28.17% 2.30% 28.82% (7.08%) 20.25% 8.19%            
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 70 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 70.00%                                  
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 primarily in common stocks. 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. 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, 2026                                  
Bar Chart, Year to Date Return 16.99%                                  
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   17.88%                       14.42%       14.82%
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   15.87%                       11.78%       13.18%
FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | Fidelity Advisor Dividend 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) [36] 0.00%                                  
Management Fees (as a percentage of Assets) [37] 0.72%                                  
Distribution and Service (12b-1) Fees 0.25%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Acquired Fund Fees and Expenses 0.19%                                  
Expenses (as a percentage of Assets) [38] 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                                  
FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | Fidelity Advisor Dividend 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) [36] 0.00%                                  
Management Fees (as a percentage of Assets) [37] 0.72%                                  
Distribution and Service (12b-1) Fees 0.50%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Acquired Fund Fees and Expenses 0.19%                                  
Expenses (as a percentage of Assets) [38] 1.41%                                  
Expense Example, with Redemption, 1 Year $ 489                                  
Expense Example, with Redemption, 3 Years 781                                  
Expense Example, with Redemption, 5 Years 1,094                                  
Expense Example, with Redemption, 10 Years 1,982                                  
Expense Example, No Redemption, 1 Year 489                                  
Expense Example, No Redemption, 3 Years 781                                  
Expense Example, No Redemption, 5 Years 1,094                                  
Expense Example, No Redemption, 10 Years $ 1,982                                  
FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | Fidelity Advisor Dividend 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) [39] 1.00%                                  
Management Fees (as a percentage of Assets) [37] 0.72%                                  
Distribution and Service (12b-1) Fees 1.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Acquired Fund Fees and Expenses 0.19%                                  
Expenses (as a percentage of Assets) [38] 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                                  
FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | Fidelity Advisor Dividend 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) [37] 0.72%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Acquired Fund Fees and Expenses 0.19%                                  
Expenses (as a percentage of Assets) [38] 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                                  
Expense Example, No Redemption, 1 Year 93                                  
Expense Example, No Redemption, 3 Years 290                                  
Expense Example, No Redemption, 5 Years 504                                  
Expense Example, No Redemption, 10 Years $ 1,120                                  
FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | Fidelity Advisor Dividend 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) [37] 0.61%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Acquired Fund Fees and Expenses 0.19%                                  
Expenses (as a percentage of Assets) [38] 0.81%                                  
Expense Example, with Redemption, 1 Year $ 83                                  
Expense Example, with Redemption, 3 Years 259                                  
Expense Example, with Redemption, 5 Years 450                                  
Expense Example, with Redemption, 10 Years 1,002                                  
Expense Example, No Redemption, 1 Year 83                                  
Expense Example, No Redemption, 3 Years 259                                  
Expense Example, No Redemption, 5 Years 450                                  
Expense Example, No Redemption, 10 Years $ 1,002                                  
FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund                                    
Prospectus Line Items                                    
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Dividend Growth Fund /Fidelity Advisor® Dividend Growth Fund A, M, C, I, Z                                    
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. 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 70 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 70.00%                                  
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                                  
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 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 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. 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® Dividend 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® Dividend 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® Dividend 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® Dividend 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® Dividend 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® Dividend 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, 2026                                  
Bar Chart, Year to Date Return 16.94%                                  
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-AMCIZPro | Fidelity Dividend Growth Fund | SP001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   S&P 500® Index                                
Average Annual Return, Percent   17.88%                       14.42%       14.82%
FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | IXWJP                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Morningstar® US Dividend Growth Index℠                                
Average Annual Return, Percent   15.87%                       11.78%       13.18%
FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | Fidelity Leveraged Company Stock Fund - Class K                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) 0.58%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.59%                                  
Expense Example, with Redemption, 1 Year $ 60                                  
Expense Example, with Redemption, 3 Years 189                                  
Expense Example, with Redemption, 5 Years 329                                  
Expense Example, with Redemption, 10 Years $ 738                                  
Average Annual Return, Label [Optional Text]   Class K                                
Average Annual Return, Percent   20.42%                       13.36%       13.38%
Annual Return [Percent]     20.42% 26.80% 26.22% (23.06%) 26.26% 26.85% 35.76% (16.33%) 21.15% 7.38%            
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 38 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 38.00%                                  
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 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). 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 24.42%                                  
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 | IXXVV                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Fidelity U.S. Leveraged Stock Linked Index℠                                
Average Annual Return, Percent   18.31%                       12.65%       10.60%
FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | RS006                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell Midcap® Index                                
Average Annual Return, Percent   10.60%                       8.67%       11.01%
FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | RS003                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 3000® Index                                
Average Annual Return, Percent   17.15%                       13.15%       14.29%
FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | Fidelity Dividend Growth Fund                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) [40] 0.67%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Acquired Fund Fees and Expenses 0.19%                                  
Expenses (as a percentage of Assets) [41] 0.87%                                  
Expense Example, with Redemption, 1 Year $ 89                                  
Expense Example, with Redemption, 3 Years 278                                  
Expense Example, with Redemption, 5 Years 482                                  
Expense Example, with Redemption, 10 Years $ 1,073                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   22.49%                       15.78%       12.67%
Annual Return [Percent]     22.49% 27.48% 17.83% (11.70%) 28.03% 2.20% 28.73% (7.23%) 20.14% 8.05%            
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 70 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 70.00%                                  
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 primarily in common stocks. 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. 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, 2026                                  
Bar Chart, Year to Date Return 16.94%                                  
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   19.77%                       13.38%       10.34%
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   15.00%                       12.03%       9.65%
FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | SP001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   S&P 500® Index                                
Average Annual Return, Percent   17.88%                       14.42%       14.82%
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   15.87%                       11.78%       13.18%
FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | Fidelity Blue Chip Growth Fund - Class K                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) [42] 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   19.99%                       14.60%       19.64%
Annual Return [Percent]     19.99% 39.80% 55.76% (38.40%) 22.81% 62.38% 33.56% 1.16% 36.20% 1.71%            
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 37 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 37.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 17.44%                                  
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   18.56%                       15.32%       18.13%
FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | RS001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 1000® Index                                
Average Annual Return, Percent   17.37%                       13.59%       14.59%
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) [43] 0.00%                                  
Management Fees (as a percentage of Assets) 0.70%                                  
Distribution and Service (12b-1) Fees 0.25%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.96%                                  
Expense Example, with Redemption, 1 Year $ 667                                  
Expense Example, with Redemption, 3 Years 863                                  
Expense Example, with Redemption, 5 Years 1,075                                  
Expense Example, with Redemption, 10 Years 1,685                                  
Expense Example, No Redemption, 1 Year 667                                  
Expense Example, No Redemption, 3 Years 863                                  
Expense Example, No Redemption, 5 Years 1,075                                  
Expense Example, No Redemption, 10 Years $ 1,685                                  
Annual Return, Inception Date Oct. 18, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   13.11%                     9.48% [44]          
Annual Return [Percent]     20.01%                              
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) [43] 0.00%                                  
Management Fees (as a percentage of Assets) 0.70%                                  
Distribution and Service (12b-1) Fees 0.50%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
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                                  
Annual Return, Inception Date Oct. 18, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   15.51%                     11.34% [45]          
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) [46] 1.00%                                  
Management Fees (as a percentage of Assets) 0.70%                                  
Distribution and Service (12b-1) Fees 1.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 1.71%                                  
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                  
Expense Example, with Redemption, 1 Year $ 274                                  
Expense Example, with Redemption, 3 Years 539                                  
Expense Example, with Redemption, 5 Years 928                                  
Expense Example, with Redemption, 10 Years 1,821                                  
Expense Example, No Redemption, 1 Year 174                                  
Expense Example, No Redemption, 3 Years 539                                  
Expense Example, No Redemption, 5 Years 928                                  
Expense Example, No Redemption, 10 Years $ 1,821                                  
Annual Return, Inception Date Oct. 18, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   18.09%                     14.12% [47]          
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) 0.70%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.71%                                  
Expense Example, with Redemption, 1 Year $ 73                                  
Expense Example, with Redemption, 3 Years 227                                  
Expense Example, with Redemption, 5 Years 395                                  
Expense Example, with Redemption, 10 Years 883                                  
Expense Example, No Redemption, 1 Year 73                                  
Expense Example, No Redemption, 3 Years 227                                  
Expense Example, No Redemption, 5 Years 395                                  
Expense Example, No Redemption, 10 Years $ 883                                  
Annual Return, Inception Date Oct. 18, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   20.30%                     15.28% [48]          
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) 0.58%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.59%                                  
Expense Example, with Redemption, 1 Year $ 60                                  
Expense Example, with Redemption, 3 Years 189                                  
Expense Example, with Redemption, 5 Years 329                                  
Expense Example, with Redemption, 10 Years 738                                  
Expense Example, No Redemption, 1 Year 60                                  
Expense Example, No Redemption, 3 Years 189                                  
Expense Example, No Redemption, 5 Years 329                                  
Expense Example, No Redemption, 10 Years $ 738                                  
Annual Return, Inception Date Oct. 18, 2024                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   20.43%                     15.41% [49]          
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 38 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 38.00%                                  
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 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). 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. 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.                                  
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 performance of the fund's shares over the past 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 institutional .fidelity.com for more recent performance information .                                  
Performance Information Illustrates Variability of Returns [Text] The information illustrates the performance of the fund's shares over the past 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] 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, 2026                                  
Bar Chart, Year to Date Return 24.19%                                  
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                  
Highest Quarterly Return, Date Jun. 30, 2025                                  
Highest Quarterly Return 23.92%                                  
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                  
Lowest Quarterly Return, Date Mar. 31, 2025                                  
Lowest Quarterly Return (10.97%)                                  
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.                                  
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | After Taxes on Distributions | Fidelity Advisor Leveraged Company Stock Fund - Class A                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                                
Average Annual Return, Percent   11.88%                     7.86% [44]          
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | After Taxes on Distributions and Sales | Fidelity Advisor Leveraged Company Stock 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   8.64%                     7.16% [44]          
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   18.31%                     16.17%          
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | RS006                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell Midcap® Index                                
Average Annual Return, Percent   10.60%                     7.35%          
FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | RS003                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 3000® Index                                
Average Annual Return, Percent   17.15%                     14.66%          
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) [50] 0.00%                                  
Management Fees (as a percentage of Assets) 0.68%                                  
Distribution and Service (12b-1) Fees 0.25%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.94%                                  
Expense Example, with Redemption, 1 Year $ 492                                  
Expense Example, with Redemption, 3 Years 688                                  
Expense Example, with Redemption, 5 Years 899                                  
Expense Example, with Redemption, 10 Years 1,509                                  
Expense Example, No Redemption, 1 Year 492                                  
Expense Example, No Redemption, 3 Years 688                                  
Expense Example, No Redemption, 5 Years 899                                  
Expense Example, No Redemption, 10 Years $ 1,509                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   2.61%                       4.00%       5.11%
Annual Return [Percent]     6.88% 7.60% 9.02% (14.78%) 18.64% (1.36%) 17.51% (0.82%) 7.04% 9.92%            
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) [50] 0.00%                                  
Management Fees (as a percentage of Assets) 0.68%                                  
Distribution and Service (12b-1) Fees 0.25%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.94%                                  
Expense Example, with Redemption, 1 Year $ 492                                  
Expense Example, with Redemption, 3 Years 688                                  
Expense Example, with Redemption, 5 Years 899                                  
Expense Example, with Redemption, 10 Years 1,509                                  
Expense Example, No Redemption, 1 Year 492                                  
Expense Example, No Redemption, 3 Years 688                                  
Expense Example, No Redemption, 5 Years 899                                  
Expense Example, No Redemption, 10 Years $ 1,509                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   2.61%                       3.99%       5.10%
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) [51] 1.00%                                  
Management Fees (as a percentage of Assets) 0.68%                                  
Distribution and Service (12b-1) Fees 1.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 1.69%                                  
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                  
Expense Example, with Redemption, 1 Year $ 272                                  
Expense Example, with Redemption, 3 Years 533                                  
Expense Example, with Redemption, 5 Years 918                                  
Expense Example, with Redemption, 10 Years 1,799                                  
Expense Example, No Redemption, 1 Year 172                                  
Expense Example, No Redemption, 3 Years 533                                  
Expense Example, No Redemption, 5 Years 918                                  
Expense Example, No Redemption, 10 Years $ 1,799                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   5.08%                       4.08%       4.92%
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) 0.68%                                  
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                                  
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                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   7.11%                       5.13%       5.82%
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   7.30%                       5.27%   5.46% [52]    
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.                                  
Objective, Secondary [Text Block] 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 38 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 16 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 16.00%                                  
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 38 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 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. 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). 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 4.10%                                  
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   0.90%                       2.49%       3.38%
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   1.63%                       2.51%       3.30%
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   5.81%                       2.11%       4.01%
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   8.50%                       4.50%       6.44%
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   7.58%                       0.06%       2.44%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | Fidelity Small Cap Value Fund                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) [53] 0.74%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.75%                                  
Expense Example, with Redemption, 1 Year $ 77                                  
Expense Example, with Redemption, 3 Years 240                                  
Expense Example, with Redemption, 5 Years 417                                  
Expense Example, with Redemption, 10 Years $ 930                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   8.23%                       10.81%       10.01%
Annual Return [Percent]     8.23% 9.29% 17.74% (13.16%) 38.14% 11.18% 20.85% (15.04%) 12.26% 21.28%            
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 134 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 134.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 28.70%                                  
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   5.80%                       8.84%       7.97%
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   6.58%                       8.21%       7.63%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | RS003                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 3000® Index                                
Average Annual Return, Percent   17.15%                       13.15%       14.29%
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   12.59%                       8.88%       9.27%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | Fidelity Small Cap Growth Fund                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) [54] 0.85%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 0.86%                                  
Expense Example, with Redemption, 1 Year $ 88                                  
Expense Example, with Redemption, 3 Years 274                                  
Expense Example, with Redemption, 5 Years 477                                  
Expense Example, with Redemption, 10 Years $ 1,061                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   11.30%                       5.67%       12.84%
Annual Return [Percent]     11.30% 20.53% 19.02% (25.34%) 10.55% 36.41% 36.31% (4.58%) 29.01% 10.97%            
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 97 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 97.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 27.63%                                  
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   9.65%                       4.24%       11.10%
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   7.81%                       4.09%       10.13%
FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | RS003                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 3000® Index                                
Average Annual Return, Percent   17.15%                       13.15%       14.29%
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   13.01%                       3.18%       9.57%
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   15.78%                       10.25%       11.43%
Annual Return [Percent]     15.78% 15.09% 20.38% (17.88%) 23.67% 17.04% 29.91% (7.63%) 12.02% 15.18%            
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 48 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 48.00%                                  
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. 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, 2026                                  
Bar Chart, Year to Date Return 24.60%                                  
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   14.50%                       7.48%       9.14%
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   10.08%                       7.26%       8.63%
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   17.15%                       13.15%       14.29%
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   12.81%                       6.09%       9.62%
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) [55] 0.00%                                  
Management Fees (as a percentage of Assets) [56] 0.90%                                  
Distribution and Service (12b-1) Fees 0.25%                                  
Other Expenses (as a percentage of Assets): 0.01%                                  
Expenses (as a percentage of Assets) 1.16%                                  
Expense Example, with Redemption, 1 Year $ 686                                  
Expense Example, with Redemption, 3 Years 922                                  
Expense Example, with Redemption, 5 Years 1,177                                  
Expense Example, with Redemption, 10 Years 1,903                                  
Expense Example, No Redemption, 1 Year 686                                  
Expense Example, No Redemption, 3 Years 922                                  
Expense Example, No Redemption, 5 Years 1,177                                  
Expense Example, No Redemption, 10 Years $ 1,903                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   4.61%                       4.14%       11.86%
Annual Return [Percent]     10.99% 20.18% 18.72% (25.57%) 10.24% 36.02% 35.97% (4.87%) 28.64% 10.65%            
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) [55] 0.00%                                  
Management Fees (as a percentage of Assets) [56] 0.90%                                  
Distribution and Service (12b-1) Fees 0.50%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 1.40%                                  
Expense Example, with Redemption, 1 Year $ 488                                  
Expense Example, with Redemption, 3 Years 778                                  
Expense Example, with Redemption, 5 Years 1,089                                  
Expense Example, with Redemption, 10 Years 1,971                                  
Expense Example, No Redemption, 1 Year 488                                  
Expense Example, No Redemption, 3 Years 778                                  
Expense Example, No Redemption, 5 Years 1,089                                  
Expense Example, No Redemption, 10 Years $ 1,971                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   6.82%                       4.37%       11.83%
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) [57] 1.00%                                  
Management Fees (as a percentage of Assets) [56] 0.90%                                  
Distribution and Service (12b-1) Fees 1.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 1.90%                                  
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                  
Expense Example, with Redemption, 1 Year $ 293                                  
Expense Example, with Redemption, 3 Years 597                                  
Expense Example, with Redemption, 5 Years 1,026                                  
Expense Example, with Redemption, 10 Years 2,030                                  
Expense Example, No Redemption, 1 Year 193                                  
Expense Example, No Redemption, 3 Years 597                                  
Expense Example, No Redemption, 5 Years 1,026                                  
Expense Example, No Redemption, 10 Years $ 2,030                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   9.15%                       4.58%       11.84%
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) [56] 0.90%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 0.90%                                  
Expense Example, with Redemption, 1 Year $ 92                                  
Expense Example, with Redemption, 3 Years 287                                  
Expense Example, with Redemption, 5 Years 498                                  
Expense Example, with Redemption, 10 Years 1,108                                  
Expense Example, No Redemption, 1 Year 92                                  
Expense Example, No Redemption, 3 Years 287                                  
Expense Example, No Redemption, 5 Years 498                                  
Expense Example, No Redemption, 10 Years $ 1,108                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   11.27%                       5.65%       12.82%
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) [56] 0.79%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
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                                  
Annual Return, Inception Date Feb. 01, 2017                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   11.39%                       5.79%     12.86% [58]  
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 97 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 97.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 27.44%                                  
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   2.94%                       2.66%       10.07%
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   3.87%                       2.89%       9.26%
FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | RS003                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   Russell 3000® Index                                
Average Annual Return, Percent   17.15%                       13.15%       14.29%
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   13.01%                       3.18%       9.57%
FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | Fidelity Growth & Income Portfolio                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) 0.51%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.00%                                  
Expenses (as a percentage of Assets) 0.51%                                  
Expense Example, with Redemption, 1 Year $ 52                                  
Expense Example, with Redemption, 3 Years 164                                  
Expense Example, with Redemption, 5 Years 285                                  
Expense Example, with Redemption, 10 Years $ 640                                  
Average Annual Return, Label [Optional Text]   Return Before Taxes                                
Average Annual Return, Percent   21.63%                       16.05%       13.85%
Annual Return [Percent]     21.63% 22.05% 18.61% (5.00%) 25.85% 7.99% 30.21% (8.91%) 16.88% 16.06%            
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 27 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 27.00%                                  
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 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. 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.                                  
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, 2026                                  
Bar Chart, Year to Date Return 9.06%                                  
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   18.89%                       14.40%       12.66%
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   14.60%                       12.63%       11.31%
FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | SP001                                    
Prospectus Line Items                                    
Average Annual Return, Label [Optional Text]   S&P 500® Index                                
Average Annual Return, Percent   17.88%                       14.42%       14.82%
FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | Fidelity Real Estate Income Fund - ETF Class                                    
Prospectus Line Items                                    
Management Fees (as a percentage of Assets) 0.51%                                  
Distribution and Service (12b-1) Fees 0.00%                                  
Other Expenses (as a percentage of Assets): 0.25%                                  
Expenses (as a percentage of Assets) 0.76%                                  
Fee Waiver or Reimbursement [59] (0.19%)                                  
Net Expenses (as a percentage of Assets) 0.57%                                  
Expense Example, with Redemption, 1 Year $ 58                                  
Expense Example, with Redemption, 3 Years 217                                  
Expense Example, with Redemption, 5 Years 397                                  
Expense Example, with Redemption, 10 Years $ 918                                  
FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund                                    
Prospectus Line Items                                    
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Real Estate Income Fund /ETF Class                                    
Objective [Heading] Investment Objective                                  
Objective, Primary [Text Block] Fidelity® Real Estate Income Fund seeks higher than average income.                                  
Objective, Secondary [Text Block] 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's ETF Class. 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                                  
Fee Waiver or Reimbursement over Assets, Date of Termination Nov. 30, 2027                                  
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 16 % of the average value of its portfolio.                                  
Portfolio Turnover, Rate 16.00%                                  
Expense Example Narrative [Text Block] This example helps compare the cost of investing in the fund's ETF Class with the cost of investing in other funds or classes. Let's say, hypothetically, that the annual return for ETF Class shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund's ETF Class 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 ETF Class 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 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. 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). 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.                                  
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 ETF Class shares are a new class of shares for which performance information is not available, and therefore, for periods prior to the inception of the ETF Class shares, the bar chart and table show performance information for the Fidelity® Real Estate Income Fund shares of the fund, a mutual fund class of shares of the fund not offered in this Prospectus. Returns of the ETF Class shares of the fund may vary from the returns of the Fidelity® Real Estate Income Fund shares due to differences in expenses. The information illustrates the changes in the performance of Fidelity® Real Estate Income 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, 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 for Fidelity® Real Estate Income Fund, a class of shares of the fund. Performance history will be available at www.fidelity.com for ETF Class after ETF Class has been in operation for one calendar year.                                  
Performance Information Illustrates Variability of Returns [Text] The information illustrates the changes in the performance of Fidelity® Real Estate Income 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, a hypothetical composite of market indexes, and an additional index over various periods of time.                                  
Performance One Year or Less [Text] Performance history will be available at www.fidelity.com for ETF Class after ETF Class has 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® Real Estate Income Fund, a class of shares of the fund that is not offered through this prospectus. ETF Class would have substantially similar annual returns to Fidelity® Real Estate Income Fund because the classes are invested in the same portfolio of securities. ETF Class's returns would differ from Fidelity® Real Estate Income 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, 2026                                  
Bar Chart, Year to Date Return 4.21%                                  
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-ETFClassPRO | 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   5.81%                       2.11%       4.01%
FidelityRealEstateIncomeFund-ETFClassPRO | 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   8.50%                       4.50%       6.44%
FidelityRealEstateIncomeFund-ETFClassPRO | 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   7.58%                       0.06%       2.44%
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 From May 25, 2017 .
[10]
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.
[11]
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.
[12]
A From October 8, 2024 .
[13]
B From October 8, 2024 .
[14]
B On Class C shares redeemed less than one year after purchase.
[15]
C From October 8, 2024 .
[16]
D From October 8, 2024 .
[17]
E From October 8, 2024 .
[18]
A Based on estimated amounts for the current fiscal year.
[19]
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.
[20]
B On Class C shares redeemed less than one year after purchase.
[21]
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.
[22]
A From May 25, 2017 .
[23] AClass 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.
[24] AThe 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.
[25] AFrom October 8, 2024.
[26] BFrom October 8, 2024.
[27] BOn Class C shares redeemed less than one year after purchase.
[28] CFrom October 8, 2024.
[29] DFrom October 8, 2024.
[30] EFrom October 8, 2024.
[31] AClass 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.
[32] AThe 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.
[33] BOn Class C shares redeemed less than one year after purchase.
[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 S&P 500® Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[35]
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.
[36]
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.
[37]
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.
[38]
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 .
[39]
B On Class C shares redeemed less than one year after purchase.
[40]
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.
[41]
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.
[42]
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.
[43]
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.
[44]
A From October 18, 2024 .
[45]
B From October 18, 2024 .
[46]
B On Class C shares redeemed less than one year after purchase.
[47]
C From October 18, 2024 .
[48]
D From October 18, 2024 .
[49]
E From October 18, 2024 .
[50]
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.
[51]
B On Class C shares redeemed less than one year after purchase.
[52]
A From October 2, 2018 .
[53]
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.
[54]
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.
[55]
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.
[56]
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.
[57]
B On Class C shares redeemed less than one year after purchase.
[58]
A From February 1, 2017 .
[59]
A Fidelity Management & Research Company LLC (FMR) has contractually agreed to reimburse ETF Class shares of the fund to the extent that total operating expenses (excluding interest, certain taxes, fees and expenses of the Independent Trustees, proxy and shareholder meeting expenses, extraordinary expenses, and acquired fund fees and expenses (including fees and expenses associated with a wholly owned subsidiary), if any, as well as non-operating expenses such as brokerage commissions and fees and expenses associated with the fund's securities lending program, if applicable), as a percentage of its average net assets, exceed 0.57% (the Expense Cap). If at any time during the current fiscal year expenses for ETF Class shares of the fund fall below the Expense Cap, FMR reserves the right to recoup through the end of the fiscal year any expenses that were reimbursed during the current fiscal year up to, but not in excess of, the Expense Cap. This arrangement will remain in effect through November 30, 2027 . FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees and may extend it in its discretion after that date.