v3.26.1
Risk/Return Detail Data - FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO - USD ($)
 12 Months Ended 48 Months Ended 60 Months Ended 84 Months Ended 96 Months Ended 120 Months Ended
Jun. 29, 2026
Jun. 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
Jun. 29, 2026
Jun. 29, 2026
Jun. 29, 2026
Jun. 29, 2026
Jun. 29, 2026
FidelityGlobalHighIncomeFundFidelityHighIncomeFund-AMCIZComboPRO | Fidelity High Income Fund | Fidelity Advisor High 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) [1] 0.00%                                
Management Fees (as a percentage of Assets) 0.69%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Acquired Fund Fees and Expenses [2] 0.03%                                
Expenses (as a percentage of Assets) [2] 0.98%                                
Expense Example, with Redemption, 1 Year $ 496                                
Expense Example, with Redemption, 3 Years 700                                
Expense Example, with Redemption, 5 Years 920                                
Expense Example, with Redemption, 10 Years 1,553                                
Expense Example, No Redemption, 1 Year 496                                
Expense Example, No Redemption, 3 Years 700                                
Expense Example, No Redemption, 5 Years 920                                
Expense Example, No Redemption, 10 Years $ 1,553                                
Annual Return, Inception Date Dec. 04, 2018                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   5.13%                       2.99%   3.89% [3]  
Annual Return [Percent]     9.51% 9.10% 10.64% (12.26%) 4.05% 2.03% 13.92%                
FidelityGlobalHighIncomeFundFidelityHighIncomeFund-AMCIZComboPRO | Fidelity High Income Fund | Fidelity Advisor High 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) [1] 0.00%                                
Management Fees (as a percentage of Assets) 0.69%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Acquired Fund Fees and Expenses [2] 0.03%                                
Expenses (as a percentage of Assets) [2] 0.98%                                
Expense Example, with Redemption, 1 Year $ 496                                
Expense Example, with Redemption, 3 Years 700                                
Expense Example, with Redemption, 5 Years 920                                
Expense Example, with Redemption, 10 Years 1,553                                
Expense Example, No Redemption, 1 Year 496                                
Expense Example, No Redemption, 3 Years 700                                
Expense Example, No Redemption, 5 Years 920                                
Expense Example, No Redemption, 10 Years $ 1,553                                
Annual Return, Inception Date Dec. 04, 2018                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   5.13%                       2.98%   3.88% [4]  
FidelityGlobalHighIncomeFundFidelityHighIncomeFund-AMCIZComboPRO | Fidelity High Income Fund | Fidelity Advisor High 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) [5] 1.00%                                
Management Fees (as a percentage of Assets) 0.69%                                
Distribution and Service (12b-1) Fees 1.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Acquired Fund Fees and Expenses [2] 0.03%                                
Expenses (as a percentage of Assets) [2] 1.73%                                
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                
Expense Example, with Redemption, 1 Year $ 276                                
Expense Example, with Redemption, 3 Years 545                                
Expense Example, with Redemption, 5 Years 939                                
Expense Example, with Redemption, 10 Years 1,842                                
Expense Example, No Redemption, 1 Year 176                                
Expense Example, No Redemption, 3 Years 545                                
Expense Example, No Redemption, 5 Years 939                                
Expense Example, No Redemption, 10 Years $ 1,842                                
Annual Return, Inception Date Dec. 04, 2018                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   7.69%                       3.04%   3.71% [6]  
FidelityGlobalHighIncomeFundFidelityHighIncomeFund-AMCIZComboPRO | Fidelity High Income Fund | Fidelity Advisor High Income Fund - Class I                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) 0.00%                                
Management Fees (as a percentage of Assets) 0.69%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Acquired Fund Fees and Expenses [2] 0.03%                                
Expenses (as a percentage of Assets) [2] 0.73%                                
Expense Example, with Redemption, 1 Year $ 75                                
Expense Example, with Redemption, 3 Years 233                                
Expense Example, with Redemption, 5 Years 406                                
Expense Example, with Redemption, 10 Years 906                                
Expense Example, No Redemption, 1 Year 75                                
Expense Example, No Redemption, 3 Years 233                                
Expense Example, No Redemption, 5 Years 406                                
Expense Example, No Redemption, 10 Years $ 906                                
Annual Return, Inception Date Dec. 04, 2018                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   9.77%                       4.12%   4.76% [7]  
FidelityGlobalHighIncomeFundFidelityHighIncomeFund-AMCIZComboPRO | Fidelity High Income Fund | Fidelity Advisor High 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) 0.59%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Acquired Fund Fees and Expenses [2] 0.03%                                
Expenses (as a percentage of Assets) [2] 0.63%                                
Expense Example, with Redemption, 1 Year $ 64                                
Expense Example, with Redemption, 3 Years 202                                
Expense Example, with Redemption, 5 Years 351                                
Expense Example, with Redemption, 10 Years 786                                
Expense Example, No Redemption, 1 Year 64                                
Expense Example, No Redemption, 3 Years 202                                
Expense Example, No Redemption, 5 Years 351                                
Expense Example, No Redemption, 10 Years $ 786                                
Annual Return, Inception Date Dec. 04, 2018                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   9.89%                       4.20%   4.86% [8]  
FidelityGlobalHighIncomeFundFidelityHighIncomeFund-AMCIZComboPRO | Fidelity High Income Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® High Income Fund /Fidelity Advisor® High Income Fund A, M, C, I, Z                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® High Income Fund seeks a high level of current income. Growth of capital may also be considered.                                
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 78 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 78.00%                                
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 income-producing debt securities, preferred stocks, and convertible securities. Normally investing at least 80% of assets in below investment grade debt securities. 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).  Below investment grade debt securities are debt securities that are rated below BBB- or its equivalent by at least one nationally recognized statistical ratings organization (NRSRO), or, if unrated, determined by the Adviser to be of comparable quality. 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. Potentially investing in non-income producing securities, including defaulted securities and common stocks. Investing in companies in troubled or uncertain financial condition. Using the credit quality distribution of an index representing the overall high yield bond market, which as of April 30, 2026, was the ICE® BofA® US High Yield Constrained Index, as a guide in structuring the fund's credit quality composition. 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 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 Mar. 31, 2026                                
Bar Chart, Year to Date Return 0.36%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 8.17%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (13.40%)                                
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.                                
FidelityGlobalHighIncomeFundFidelityHighIncomeFund-AMCIZComboPRO | Fidelity High Income Fund | After Taxes on Distributions | Fidelity Advisor High Income Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   2.51%                       0.80%   1.72% [3]  
FidelityGlobalHighIncomeFundFidelityHighIncomeFund-AMCIZComboPRO | Fidelity High Income Fund | After Taxes on Distributions and Sales | Fidelity Advisor High Income Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   2.97%                       1.29%   2.00% [3]  
FidelityGlobalHighIncomeFundFidelityHighIncomeFund-AMCIZComboPRO | Fidelity High 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%   2.51%  
FidelityGlobalHighIncomeFundFidelityHighIncomeFund-AMCIZComboPRO | Fidelity High Income Fund | ML040                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   ICE® BofA® US High Yield Constrained Index                              
Average Annual Return, Percent   8.50%                       4.50%   5.64%  
FidelityWomensLeadershipFund-RetailPRO | Fidelity Women's Leadership Fund | Fidelity Women's Leadership Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) [9] 0.56%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.11%                                
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                                
Annual Return, Inception Date May 01, 2019                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   19.17%                       9.46% 12.20% [10]    
Annual Return [Percent]     19.17% 13.70% 21.12% (19.81%) 19.42% 25.30%                  
FidelityWomensLeadershipFund-RetailPRO | Fidelity Women's Leadership Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Women's Leadership Fund /Fidelity® Women's Leadership Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Women's Leadership Fund seeks long-term growth of capital.                                
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 25 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 25.00%                                
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 equity securities of companies that prioritize and advance women's leadership and development. Such companies include those that (i) include a woman as a member of the senior management team, (ii) are governed by a board for which women represent at least one third of all directors, or (iii) in Fidelity Management & Research Company LLC's (FMR) (the Adviser) opinion, have adopted policies designed to attract, retain and promote women. 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. 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 securities of domestic and foreign issuers. Employing sustainable investing exclusion criteria to avoid investments in issuers that are directly engaged in, and/or derive significant revenue from, certain industries. Please see "Fund Basics - Investment Details - Sustainable Investing Exclusions" for additional information.                                
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 Mar. 31, 2026                                
Bar Chart, Year to Date Return (4.30%)                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 26.00%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (21.25%)                                
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.                                
FidelityWomensLeadershipFund-RetailPRO | Fidelity Women's Leadership Fund | After Taxes on Distributions | Fidelity Women's Leadership Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   17.48%                       8.83% 11.70% [10]    
FidelityWomensLeadershipFund-RetailPRO | Fidelity Women's Leadership Fund | After Taxes on Distributions and Sales | Fidelity Women's Leadership Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   12.37%                       7.38% 9.83% [10]    
FidelityWomensLeadershipFund-RetailPRO | Fidelity Women's Leadership Fund | IXYIK                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   MSCI USA Women's Leadership Index                              
Average Annual Return, Percent   6.88%                       6.31% 9.00%    
FidelityWomensLeadershipFund-RetailPRO | Fidelity Women's Leadership Fund | RS003                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 3000® Index                              
Average Annual Return, Percent   17.15%                       13.15% 14.69%    
FidelitySeriesHighIncomeFund-PRO | Fidelity Series High Income Fund | Fidelity Series High 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%                                
Acquired Fund Fees and Expenses [11] 0.13%                                
Expenses (as a percentage of Assets) 0.13%                                
Fee Waiver or Reimbursement [12] (0.01%)                                
Net Expenses (as a percentage of Assets) [11] 0.12%                                
Expense Example, with Redemption, 1 Year $ 12                                
Expense Example, with Redemption, 3 Years 41                                
Expense Example, with Redemption, 5 Years 72                                
Expense Example, with Redemption, 10 Years $ 165                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   11.13%                       5.23%     6.82%
Annual Return [Percent]     11.13% 9.29% 11.20% (10.26%) 6.44% 4.54% 15.16% (2.17%) 9.36% 16.40%          
FidelitySeriesHighIncomeFund-PRO | Fidelity Series High Income Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund: Fidelity® Series High Income Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Series High Income Fund seeks a high level of current income. Growth of capital may also be considered.                                
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                                
Fee Waiver or Reimbursement over Assets, Date of Termination Aug. 31, 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 73 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 73.00%                                
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 income-producing debt securities, preferred stocks, and convertible securities. Normally investing at least 80% of assets in below investment grade debt securities. 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).  Below investment grade debt securities are debt securities that are rated below BBB- or its equivalent by at least one nationally recognized statistical ratings organization (NRSRO), or, if unrated, determined by the Adviser to be of comparable quality. 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. Potentially investing in non-income producing securities, including defaulted securities and common stocks. Investing in companies in troubled or uncertain financial condition. Using the credit quality distribution of an index representing the overall high yield bond market, which as of April 30, 2026, was the ICE® BofA® US High Yield Constrained Index, as a guide in structuring the fund's credit quality composition. 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 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 Mar. 31, 2026                                
Bar Chart, Year to Date Return 0.30%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 8.71%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (12.76%)                                
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.                                
FidelitySeriesHighIncomeFund-PRO | Fidelity Series High Income Fund | After Taxes on Distributions | Fidelity Series High Income Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   7.95%                       2.59%     4.13%
FidelitySeriesHighIncomeFund-PRO | Fidelity Series High Income Fund | After Taxes on Distributions and Sales | Fidelity Series High 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   6.50%                       2.81%     4.07%
FidelitySeriesHighIncomeFund-PRO | Fidelity Series High 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%
FidelitySeriesHighIncomeFund-PRO | Fidelity Series High 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%
FidelityShortDurationHighIncomeFund-RetailPRO | Fidelity Short Duration High Income Fund | Fidelity Short Duration High Income Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.65%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.07%                                
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   7.72%                       4.52%     4.97%
Annual Return [Percent]     7.72% 8.20% 10.26% (6.06%) 3.32% 3.96% 9.30% (1.27%) 4.95% 10.62%          
FidelityShortDurationHighIncomeFund-RetailPRO | Fidelity Short Duration High Income Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Short Duration High Income Fund /Fidelity® Short Duration High Income Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Short Duration High Income Fund seeks a high level of current income. The fund may also seek 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 88 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 88.00%                                
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 income-producing debt securities, preferred stocks, and convertible securities. Normally investing at least 80% of assets in below investment grade debt securities. 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).  Below investment grade debt securities are debt securities that are rated below BBB- or its equivalent by at least one nationally recognized statistical ratings organization (NRSRO), or, if unrated, determined by the Adviser to be of comparable quality. 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 securities rated BB or B by Standard & Poor's (S&P), Ba or B by Moody's Investors Service (Moody's), comparably rated by at least one nationally recognized credit rating agency, or, if unrated, considered by Fidelity Management & Research Company (FMR) to be of comparable quality. Potentially investing in non-income producing securities, including defaulted securities and common stocks. Investing in companies in troubled or uncertain financial condition. Normally maintaining a duration of three years or less. Investing in floating rate loans, which are often lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), and other floating rate securities. 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 Mar. 31, 2026                                
Bar Chart, Year to Date Return 0.39%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 7.13%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (8.50%)                                
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.                                
FidelityShortDurationHighIncomeFund-RetailPRO | Fidelity Short Duration High Income Fund | After Taxes on Distributions | Fidelity Short Duration High Income Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   4.55%                       2.23%     2.92%
FidelityShortDurationHighIncomeFund-RetailPRO | Fidelity Short Duration High Income Fund | After Taxes on Distributions and Sales | Fidelity Short Duration High 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   4.51%                       2.45%     2.92%
FidelityShortDurationHighIncomeFund-RetailPRO | Fidelity Short Duration High Income Fund | F1879                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Fidelity Short Duration High Income Fund Composite Index℠                              
Average Annual Return, Percent   7.54%                       5.26%     5.75%
FidelityShortDurationHighIncomeFund-RetailPRO | Fidelity Short Duration High Income Fund | ML221                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   ICE® BofA® 1-5 Year BB-B US Cash Pay High Yield Constrained Index                              
Average Annual Return, Percent   7.82%                       5.02%     5.74%
FidelityShortDurationHighIncomeFund-RetailPRO | Fidelity Short Duration High 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%
FidelityWomensLeadershipFund-AMCIZPRO | Fidelity Women's Leadership Fund | Fidelity Advisor Women's Leadership 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) [13] 0.00%                                
Management Fees (as a percentage of Assets) [14] 0.61%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.11%                                
Expenses (as a percentage of Assets) 0.97%                                
Expense Example, with Redemption, 1 Year $ 668                                
Expense Example, with Redemption, 3 Years 866                                
Expense Example, with Redemption, 5 Years 1,080                                
Expense Example, with Redemption, 10 Years 1,696                                
Expense Example, No Redemption, 1 Year 668                                
Expense Example, No Redemption, 3 Years 866                                
Expense Example, No Redemption, 5 Years 1,080                                
Expense Example, No Redemption, 10 Years $ 1,696                                
Annual Return, Inception Date May 01, 2019                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   11.97%                       7.91% 10.94% [15]    
Annual Return [Percent]     18.80% 13.41% 20.82% (20.01%) 19.22% 25.02%                  
FidelityWomensLeadershipFund-AMCIZPRO | Fidelity Women's Leadership Fund | Fidelity Advisor Women's Leadership 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) [13] 0.00%                                
Management Fees (as a percentage of Assets) [14] 0.61%                                
Distribution and Service (12b-1) Fees 0.50%                                
Other Expenses (as a percentage of Assets): 0.11%                                
Expenses (as a percentage of Assets) 1.22%                                
Expense Example, with Redemption, 1 Year $ 470                                
Expense Example, with Redemption, 3 Years 724                                
Expense Example, with Redemption, 5 Years 997                                
Expense Example, with Redemption, 10 Years 1,776                                
Expense Example, No Redemption, 1 Year 470                                
Expense Example, No Redemption, 3 Years 724                                
Expense Example, No Redemption, 5 Years 997                                
Expense Example, No Redemption, 10 Years $ 1,776                                
Annual Return, Inception Date May 01, 2019                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   14.39%                       8.14% 11.04% [16]    
FidelityWomensLeadershipFund-AMCIZPRO | Fidelity Women's Leadership Fund | Fidelity Advisor Women's Leadership 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) [17] 1.00%                                
Management Fees (as a percentage of Assets) [14] 0.61%                                
Distribution and Service (12b-1) Fees 1.00%                                
Other Expenses (as a percentage of Assets): 0.11%                                
Expenses (as a percentage of Assets) 1.72%                                
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                
Expense Example, with Redemption, 1 Year $ 275                                
Expense Example, with Redemption, 3 Years 542                                
Expense Example, with Redemption, 5 Years 933                                
Expense Example, with Redemption, 10 Years 1,831                                
Expense Example, No Redemption, 1 Year 175                                
Expense Example, No Redemption, 3 Years 542                                
Expense Example, No Redemption, 5 Years 933                                
Expense Example, No Redemption, 10 Years $ 1,831                                
Annual Return, Inception Date May 01, 2019                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   16.98%                       8.39% 11.09% [18]    
FidelityWomensLeadershipFund-AMCIZPRO | Fidelity Women's Leadership Fund | Fidelity Advisor Women's Leadership 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) [14] 0.58%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.11%                                
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                                
Annual Return, Inception Date May 01, 2019                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   19.18%                       9.52% 12.24% [19]    
FidelityWomensLeadershipFund-AMCIZPRO | Fidelity Women's Leadership Fund | Fidelity Advisor Women's Leadership 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) [14] 0.46%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.11%                                
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 May 01, 2019                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   19.32%                       9.65% 12.38% [20]    
FidelityWomensLeadershipFund-AMCIZPRO | Fidelity Women's Leadership Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Women's Leadership Fund /Fidelity Advisor® Women's Leadership Fund A, M, C, I, Z                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Women's Leadership Fund seeks long-term growth of capital.                                
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 34 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 25 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 25.00%                                
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 34 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 equity securities of companies that prioritize and advance women's leadership and development. Such companies include those that (i) include a woman as a member of the senior management team, (ii) are governed by a board for which women represent at least one third of all directors, or (iii) in Fidelity Management & Research Company LLC's (FMR) (the Adviser) opinion, have adopted policies designed to attract, retain and promote women. 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. 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 securities of domestic and foreign issuers. Employing sustainable investing exclusion criteria to avoid investments in issuers that are directly engaged in, and/or derive significant revenue from, certain industries. Please see "Fund Basics - Investment Details - Sustainable Investing Exclusions" for additional information.                                
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 Mar. 31, 2026                                
Bar Chart, Year to Date Return (4.38%)                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 25.82%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (21.26%)                                
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.                                
FidelityWomensLeadershipFund-AMCIZPRO | Fidelity Women's Leadership Fund | After Taxes on Distributions | Fidelity Advisor Women's Leadership Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   10.44%                       7.34% 10.49% [15]    
FidelityWomensLeadershipFund-AMCIZPRO | Fidelity Women's Leadership Fund | After Taxes on Distributions and Sales | Fidelity Advisor Women's Leadership Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   8.00%                       6.13% 8.77% [15]    
FidelityWomensLeadershipFund-AMCIZPRO | Fidelity Women's Leadership Fund | IXYIK                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   MSCI USA Women's Leadership Index                              
Average Annual Return, Percent   6.88%                       6.31% 9.00%    
FidelityWomensLeadershipFund-AMCIZPRO | Fidelity Women's Leadership Fund | RS003                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Russell 3000® Index                              
Average Annual Return, Percent   17.15%                       13.15% 14.69%    
FidelityShortDurationHighIncomeFund-AMCIZPRO | Fidelity Short Duration High Income Fund | Fidelity Advisor Short Duration High 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) [21] 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): 0.07%                                
Expenses (as a percentage of Assets) 1.02%                                
Fee Waiver or Reimbursement [22] (0.02%)                                
Net Expenses (as a percentage of Assets) 1.00%                                
Expense Example, with Redemption, 1 Year $ 498                                
Expense Example, with Redemption, 3 Years 709                                
Expense Example, with Redemption, 5 Years 938                                
Expense Example, with Redemption, 10 Years 1,596                                
Expense Example, No Redemption, 1 Year 498                                
Expense Example, No Redemption, 3 Years 709                                
Expense Example, No Redemption, 5 Years 938                                
Expense Example, No Redemption, 10 Years $ 1,596                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   3.12%                       3.40%     4.28%
Annual Return [Percent]     7.42% 7.91% 9.96% (6.29%) 3.07% 3.70% 9.03% (1.51%) 4.69% 10.35%          
FidelityShortDurationHighIncomeFund-AMCIZPRO | Fidelity Short Duration High Income Fund | Fidelity Advisor Short Duration High 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) [21] 0.00%                                
Management Fees (as a percentage of Assets) 0.72%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 0.07%                                
Expenses (as a percentage of Assets) 1.04%                                
Fee Waiver or Reimbursement [22] (0.04%)                                
Net Expenses (as a percentage of Assets) 1.00%                                
Expense Example, with Redemption, 1 Year $ 498                                
Expense Example, with Redemption, 3 Years 713                                
Expense Example, with Redemption, 5 Years 946                                
Expense Example, with Redemption, 10 Years 1,615                                
Expense Example, No Redemption, 1 Year 498                                
Expense Example, No Redemption, 3 Years 713                                
Expense Example, No Redemption, 5 Years 946                                
Expense Example, No Redemption, 10 Years $ 1,615                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   3.13%                       3.40%     4.28%
FidelityShortDurationHighIncomeFund-AMCIZPRO | Fidelity Short Duration High Income Fund | Fidelity Advisor Short Duration High 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) [23] 1.00%                                
Management Fees (as a percentage of Assets) 0.74%                                
Distribution and Service (12b-1) Fees 1.00%                                
Other Expenses (as a percentage of Assets): 0.07%                                
Expenses (as a percentage of Assets) 1.81%                                
Fee Waiver or Reimbursement [22] (0.06%)                                
Net Expenses (as a percentage of Assets) 1.75%                                
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                
Expense Example, with Redemption, 1 Year $ 278                                
Expense Example, with Redemption, 3 Years 562                                
Expense Example, with Redemption, 5 Years 972                                
Expense Example, with Redemption, 10 Years 1,912                                
Expense Example, No Redemption, 1 Year 178                                
Expense Example, No Redemption, 3 Years 562                                
Expense Example, No Redemption, 5 Years 972                                
Expense Example, No Redemption, 10 Years $ 1,912                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   5.62%                       3.47%     4.08%
FidelityShortDurationHighIncomeFund-AMCIZPRO | Fidelity Short Duration High Income Fund | Fidelity Advisor Short Duration High 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) 0.67%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.07%                                
Expenses (as a percentage of Assets) 0.74%                                
Fee Waiver or Reimbursement (0.00%)                                
Net Expenses (as a percentage of Assets) 0.74%                                
Expense Example, with Redemption, 1 Year $ 76                                
Expense Example, with Redemption, 3 Years 237                                
Expense Example, with Redemption, 5 Years 411                                
Expense Example, with Redemption, 10 Years 918                                
Expense Example, No Redemption, 1 Year 76                                
Expense Example, No Redemption, 3 Years 237                                
Expense Example, No Redemption, 5 Years 411                                
Expense Example, No Redemption, 10 Years $ 918                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   7.69%                       4.51%     4.97%
FidelityShortDurationHighIncomeFund-AMCIZPRO | Fidelity Short Duration High Income Fund | Fidelity Advisor Short Duration High 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) 0.61%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.07%                                
Expenses (as a percentage of Assets) 0.68%                                
Fee Waiver or Reimbursement [22] (0.02%)                                
Net Expenses (as a percentage of Assets) 0.66%                                
Expense Example, with Redemption, 1 Year $ 67                                
Expense Example, with Redemption, 3 Years 215                                
Expense Example, with Redemption, 5 Years 376                                
Expense Example, with Redemption, 10 Years 844                                
Expense Example, No Redemption, 1 Year 67                                
Expense Example, No Redemption, 3 Years 215                                
Expense Example, No Redemption, 5 Years 376                                
Expense Example, No Redemption, 10 Years $ 844                                
Annual Return, Inception Date Oct. 02, 2018                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   7.81%                       4.60%   4.49% [24]  
FidelityShortDurationHighIncomeFund-AMCIZPRO | Fidelity Short Duration High Income Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Short Duration High Income Fund /Fidelity Advisor® Short Duration High Income Fund A, M, C, I, Z                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Short Duration High Income Fund seeks a high level of current income. The fund may also seek 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 36 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                                
Fee Waiver or Reimbursement over Assets, Date of Termination Aug. 31, 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 88 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 88.00%                                
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 36 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 income-producing debt securities, preferred stocks, and convertible securities. Normally investing at least 80% of assets in below investment grade debt securities. 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).  Below investment grade debt securities are debt securities that are rated below BBB- or its equivalent by at least one nationally recognized statistical ratings organization (NRSRO), or, if unrated, determined by the Adviser to be of comparable quality. 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 securities rated BB or B by Standard & Poor's (S&P), Ba or B by Moody's Investors Service (Moody's), comparably rated by at least one nationally recognized credit rating agency, or, if unrated, considered by Fidelity Management & Research Company (FMR) to be of comparable quality. Potentially investing in non-income producing securities, including defaulted securities and common stocks. Investing in companies in troubled or uncertain financial condition. Normally maintaining a duration of three years or less. Investing in floating rate loans, which are often lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds), and other floating rate securities. 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 Mar. 31, 2026                                
Bar Chart, Year to Date Return 0.32%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 7.07%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (8.56%)                                
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.                                
FidelityShortDurationHighIncomeFund-AMCIZPRO | Fidelity Short Duration High Income Fund | After Taxes on Distributions | Fidelity Advisor Short Duration High Income Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   0.21%                       1.22%     2.34%
FidelityShortDurationHighIncomeFund-AMCIZPRO | Fidelity Short Duration High Income Fund | After Taxes on Distributions and Sales | Fidelity Advisor Short Duration High 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   1.80%                       1.63%     2.42%
FidelityShortDurationHighIncomeFund-AMCIZPRO | Fidelity Short Duration High Income Fund | F1879                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Fidelity Short Duration High Income Fund Composite Index℠                              
Average Annual Return, Percent   7.54%                       5.26%     5.75%
FidelityShortDurationHighIncomeFund-AMCIZPRO | Fidelity Short Duration High Income Fund | ML221                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   ICE® BofA® 1-5 Year BB-B US Cash Pay High Yield Constrained Index                              
Average Annual Return, Percent   7.82%                       5.02%     5.74%
FidelityShortDurationHighIncomeFund-AMCIZPRO | Fidelity Short Duration High 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%
FidelityHealthyFutureFund-AMCIZPRO | Fidelity Healthy Future Fund | Fidelity Advisor Healthy Future 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) [25] 0.00%                                
Management Fees (as a percentage of Assets) 0.86%                                
Distribution and Service (12b-1) Fees 0.25%                                
Other Expenses (as a percentage of Assets): 1.04%                                
Expenses (as a percentage of Assets) 2.15%                                
Fee Waiver or Reimbursement [26] (0.85%)                                
Net Expenses (as a percentage of Assets) 1.30%                                
Expense Example, with Redemption, 1 Year $ 700                                
Expense Example, with Redemption, 3 Years 1,105                                
Expense Example, with Redemption, 5 Years 1,563                                
Expense Example, with Redemption, 10 Years 2,829                                
Expense Example, No Redemption, 1 Year 700                                
Expense Example, No Redemption, 3 Years 1,105                                
Expense Example, No Redemption, 5 Years 1,563                                
Expense Example, No Redemption, 10 Years $ 2,829                                
Annual Return, Inception Date May 24, 2022                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   1.11%                     8.33% [27]        
Annual Return [Percent]     7.28% 16.81% 18.70%                        
FidelityHealthyFutureFund-AMCIZPRO | Fidelity Healthy Future Fund | Fidelity Advisor Healthy Future 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) [25] 0.00%                                
Management Fees (as a percentage of Assets) 0.86%                                
Distribution and Service (12b-1) Fees 0.50%                                
Other Expenses (as a percentage of Assets): 0.99%                                
Expenses (as a percentage of Assets) 2.35%                                
Fee Waiver or Reimbursement [26] (0.80%)                                
Net Expenses (as a percentage of Assets) 1.55%                                
Expense Example, with Redemption, 1 Year $ 502                                
Expense Example, with Redemption, 3 Years 958                                
Expense Example, with Redemption, 5 Years 1,467                                
Expense Example, with Redemption, 10 Years 2,862                                
Expense Example, No Redemption, 1 Year 502                                
Expense Example, No Redemption, 3 Years 958                                
Expense Example, No Redemption, 5 Years 1,467                                
Expense Example, No Redemption, 10 Years $ 2,862                                
Annual Return, Inception Date May 24, 2022                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   3.32%                     8.77% [28]        
FidelityHealthyFutureFund-AMCIZPRO | Fidelity Healthy Future Fund | Fidelity Advisor Healthy Future Fund - Class C                                  
Prospectus Line Items                                  
Maximum Cumulative Sales Charge (as a percentage of Offering Price) 0.00%                                
Maximum Deferred Sales Charge (as a percentage) [29] 1.00%                                
Management Fees (as a percentage of Assets) 0.86%                                
Distribution and Service (12b-1) Fees 1.00%                                
Other Expenses (as a percentage of Assets): 0.99%                                
Expenses (as a percentage of Assets) 2.85%                                
Fee Waiver or Reimbursement [26] (0.80%)                                
Net Expenses (as a percentage of Assets) 2.05%                                
Expenses Deferred Charges [Text Block] On Class C shares redeemed less than one year after purchase.                                
Expense Example, with Redemption, 1 Year $ 308                                
Expense Example, with Redemption, 3 Years 781                                
Expense Example, with Redemption, 5 Years 1,408                                
Expense Example, with Redemption, 10 Years 2,930                                
Expense Example, No Redemption, 1 Year 208                                
Expense Example, No Redemption, 3 Years 781                                
Expense Example, No Redemption, 5 Years 1,408                                
Expense Example, No Redemption, 10 Years $ 2,930                                
Annual Return, Inception Date May 24, 2022                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   5.46%                     9.28% [30]        
FidelityHealthyFutureFund-AMCIZPRO | Fidelity Healthy Future Fund | Fidelity Advisor Healthy Future 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) 0.85%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 1.01%                                
Expenses (as a percentage of Assets) 1.86%                                
Fee Waiver or Reimbursement [26] (0.81%)                                
Net Expenses (as a percentage of Assets) 1.05%                                
Expense Example, with Redemption, 1 Year $ 107                                
Expense Example, with Redemption, 3 Years 478                                
Expense Example, with Redemption, 5 Years 904                                
Expense Example, with Redemption, 10 Years 2,090                                
Expense Example, No Redemption, 1 Year 107                                
Expense Example, No Redemption, 3 Years 478                                
Expense Example, No Redemption, 5 Years 904                                
Expense Example, No Redemption, 10 Years $ 2,090                                
Annual Return, Inception Date May 24, 2022                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   7.58%                     10.39% [31]        
FidelityHealthyFutureFund-AMCIZPRO | Fidelity Healthy Future Fund | Fidelity Advisor Healthy Future 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) 0.71%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 1.06%                                
Expenses (as a percentage of Assets) 1.77%                                
Fee Waiver or Reimbursement [26] (0.87%)                                
Net Expenses (as a percentage of Assets) 0.90%                                
Expense Example, with Redemption, 1 Year $ 92                                
Expense Example, with Redemption, 3 Years 442                                
Expense Example, with Redemption, 5 Years 849                                
Expense Example, with Redemption, 10 Years 1,986                                
Expense Example, No Redemption, 1 Year 92                                
Expense Example, No Redemption, 3 Years 442                                
Expense Example, No Redemption, 5 Years 849                                
Expense Example, No Redemption, 10 Years $ 1,986                                
Annual Return, Inception Date May 24, 2022                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   7.70%                     10.54% [32]        
FidelityHealthyFutureFund-AMCIZPRO | Fidelity Healthy Future Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Healthy Future Fund /Fidelity Advisor® Healthy Future Fund A, M, C, I, Z                                  
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Healthy Future Fund seeks long-term growth of capital.                                
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 36 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                                
Fee Waiver or Reimbursement over Assets, Date of Termination Aug. 31, 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 80 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 80.00%                                
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 36 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 its assets in equity securities of companies that Fidelity Management & Research Company LLC (FMR) (the Adviser) believes are working to: (i) extend and/or improve life expectancy, enhance health and wellness in people's lives, and/or (ii) mitigate environmental impacts affecting health and wellness, in each case through the products, services, or technology they provide. Such companies include those that (i) attribute 50% or more of their revenues to products focused on disease treatment, health care access, nutrition, fitness and wearables, clean emissions, dwelling-related property and casualty insurance, life and health insurance, or retirement financial security, or (ii) with respect to seeking to mitigate environmental impacts, those that are contained in the MSCI World Health & Wellness Select Index. 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. 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 securities of 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. Employing sustainable investing exclusion criteria to avoid investments in issuers that are directly engaged in, and/or derive significant revenue from, certain industries. Please see "Fund Basics - Investment Details - Sustainable Investing Exclusions" for additional information.                                
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 Mar. 31, 2026                                
Bar Chart, Year to Date Return (4.37%)                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Mar. 31, 2024                                
Highest Quarterly Return 9.20%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Sep. 30, 2023                                
Lowest Quarterly Return (5.45%)                                
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.                                
FidelityHealthyFutureFund-AMCIZPRO | Fidelity Healthy Future Fund | After Taxes on Distributions | Fidelity Advisor Healthy Future Fund - Class A                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   0.77%                     8.23% [27]        
FidelityHealthyFutureFund-AMCIZPRO | Fidelity Healthy Future Fund | After Taxes on Distributions and Sales | Fidelity Advisor Healthy Future 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   0.87%                     6.49% [27]        
FidelityHealthyFutureFund-AMCIZPRO | Fidelity Healthy Future Fund | IXV9X                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   MSCI World Health & Wellness Select Index                              
Average Annual Return, Percent   13.76%                     11.51%        
FidelityHealthyFutureFund-AMCIZPRO | Fidelity Healthy Future Fund | MS159                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   MSCI ACWI (All Country World Index) Index                              
Average Annual Return, Percent   22.71%                     16.55%        
FidelityHealthyFutureFund-RetailPRO | Fidelity Healthy Future Fund | Fidelity Healthy Future Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.81%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 1.00%                                
Expenses (as a percentage of Assets) 1.81%                                
Fee Waiver or Reimbursement [33] (0.76%)                                
Net Expenses (as a percentage of Assets) 1.05%                                
Expense Example, with Redemption, 1 Year $ 107                                
Expense Example, with Redemption, 3 Years 469                                
Expense Example, with Redemption, 5 Years 884                                
Expense Example, with Redemption, 10 Years $ 2,042                                
Annual Return, Inception Date May 24, 2022                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   7.55%                     10.39% [34]        
Annual Return [Percent]     7.55% 17.15% 18.85%                        
FidelityHealthyFutureFund-RetailPRO | Fidelity Healthy Future Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® Healthy Future Fund /Fidelity® Healthy Future Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Healthy Future Fund seeks long-term growth of capital.                                
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                                
Fee Waiver or Reimbursement over Assets, Date of Termination Aug. 31, 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 80 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 80.00%                                
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 its assets in equity securities of companies that Fidelity Management & Research Company LLC (FMR) (the Adviser) believes are working to: (i) extend and/or improve life expectancy, enhance health and wellness in people's lives, and/or (ii) mitigate environmental impacts affecting health and wellness, in each case through the products, services, or technology they provide. Such companies include those that (i) attribute 50% or more of their revenues to products focused on disease treatment, health care access, nutrition, fitness and wearables, clean emissions, dwelling-related property and casualty insurance, life and health insurance, or retirement financial security, or (ii) with respect to seeking to mitigate environmental impacts, those that are contained in the MSCI World Health & Wellness Select Index. 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. 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 securities of 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. Employing sustainable investing exclusion criteria to avoid investments in issuers that are directly engaged in, and/or derive significant revenue from, certain industries. Please see "Fund Basics - Investment Details - Sustainable Investing Exclusions" for additional information.                                
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 Mar. 31, 2026                                
Bar Chart, Year to Date Return (4.28%)                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Mar. 31, 2024                                
Highest Quarterly Return 9.36%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Sep. 30, 2023                                
Lowest Quarterly Return (5.44%)                                
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.                                
FidelityHealthyFutureFund-RetailPRO | Fidelity Healthy Future Fund | After Taxes on Distributions | Fidelity Healthy Future Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   7.13%                     10.26% [34]        
FidelityHealthyFutureFund-RetailPRO | Fidelity Healthy Future Fund | After Taxes on Distributions and Sales | Fidelity Healthy Future Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions and Sale of Fund Shares                              
Average Annual Return, Percent   4.74%                     8.14% [34]        
FidelityHealthyFutureFund-RetailPRO | Fidelity Healthy Future Fund | IXV9X                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   MSCI World Health & Wellness Select Index                              
Average Annual Return, Percent   13.76%                     11.51%        
FidelityHealthyFutureFund-RetailPRO | Fidelity Healthy Future Fund | MS159                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   MSCI ACWI (All Country World Index) Index                              
Average Annual Return, Percent   22.71%                     16.55%        
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity High Income Fund | Fidelity High Income Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.65%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Acquired Fund Fees and Expenses [35] 0.03%                                
Expenses (as a percentage of Assets) [35] 0.69%                                
Expense Example, with Redemption, 1 Year $ 70                                
Expense Example, with Redemption, 3 Years 221                                
Expense Example, with Redemption, 5 Years 384                                
Expense Example, with Redemption, 10 Years $ 859                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   9.82%                       4.13%     5.82%
Annual Return [Percent]     9.82% 9.56% 10.96% (12.00%) 4.23% 2.44% 14.25% (2.44%) 8.58% 15.97%          
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity High Income Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund /Class: Fidelity® High Income Fund /Fidelity® High Income Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® High Income Fund seeks a high level of current income. Growth of capital may also be considered.                                
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 78 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 78.00%                                
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 income-producing debt securities, preferred stocks, and convertible securities. Normally investing at least 80% of assets in below investment grade debt securities. 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).  Below investment grade debt securities are debt securities that are rated below BBB- or its equivalent by at least one nationally recognized statistical ratings organization (NRSRO), or, if unrated, determined by the Adviser to be of comparable quality. 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. Potentially investing in non-income producing securities, including defaulted securities and common stocks. Investing in companies in troubled or uncertain financial condition. Using the credit quality distribution of an index representing the overall high yield bond market, which as of April 30, 2026, was the ICE® BofA® US High Yield Constrained Index, as a guide in structuring the fund's credit quality composition. 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 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 Mar. 31, 2026                                
Bar Chart, Year to Date Return 0.31%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 8.25%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (13.34%)                                
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.                                
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity High Income Fund | After Taxes on Distributions | Fidelity High Income Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   6.96%                       1.80%     3.46%
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity High Income Fund | After Taxes on Distributions and Sales | Fidelity High 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   5.74%                       2.11%     3.44%
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity High 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%
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity High Income Fund | ML040                                  
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%
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Capital & Income Fund | Fidelity Capital & Income Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.63%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.01%                                
Acquired Fund Fees and Expenses [36] 0.24%                                
Expenses (as a percentage of Assets) 0.88%                                
Fee Waiver or Reimbursement [37] (0.02%)                                
Net Expenses (as a percentage of Assets) [36] 0.86%                                
Expense Example, with Redemption, 1 Year $ 88                                
Expense Example, with Redemption, 3 Years 278                                
Expense Example, with Redemption, 5 Years 485                                
Expense Example, with Redemption, 10 Years $ 1,082                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   12.36%                       7.03%     7.93%
Annual Return [Percent]     12.36% 10.68% 12.99% (10.47%) 11.65% 10.24% 18.94% (5.77%) 11.64% 10.73%          
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Capital & Income Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund: Fidelity® Capital & Income Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Capital & Income Fund seeks to provide a combination of income and 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, 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 Aug. 31, 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 26 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 26.00%                                
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 debt securities and income-producing equity securities. 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. 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 equity and debt securities, including defaulted 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 companies in troubled or uncertain financial condition. 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 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 Mar. 31, 2026                                
Bar Chart, Year to Date Return 0.81%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Jun. 30, 2020                                
Highest Quarterly Return 14.39%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (17.52%)                                
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.                                
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Capital & Income Fund | After Taxes on Distributions | Fidelity Capital & Income Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   10.14%                       4.54%     5.58%
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Capital & Income Fund | After Taxes on Distributions and Sales | Fidelity Capital & 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   7.25%                       4.41%     5.24%
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Capital & 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%
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Capital & Income Fund | ML040                                  
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%
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Focused High Income Fund | Fidelity Focused High Income Fund                                  
Prospectus Line Items                                  
Management Fees (as a percentage of Assets) 0.70%                                
Distribution and Service (12b-1) Fees 0.00%                                
Other Expenses (as a percentage of Assets): 0.06%                                
Expenses (as a percentage of Assets) 0.76%                                
Fee Waiver or Reimbursement [38] (0.01%)                                
Net Expenses (as a percentage of Assets) 0.75%                                
Expense Example, with Redemption, 1 Year $ 77                                
Expense Example, with Redemption, 3 Years 241                                
Expense Example, with Redemption, 5 Years 421                                
Expense Example, with Redemption, 10 Years $ 941                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   8.89%                       3.17%     4.97%
Annual Return [Percent]     8.89% 6.02% 10.25% (10.98%) 3.14% 4.50% 15.47% (2.93%) 6.97% 10.94%          
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Focused High Income Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund: Fidelity® Focused High Income Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® Focused High Income Fund seeks a high level of income. The fund may also seek 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                                
Fee Waiver or Reimbursement over Assets, Date of Termination Aug. 31, 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 77 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 77.00%                                
Expense Example Narrative [Text Block] This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:                                
Strategy [Heading] Principal Investment Strategies                                
Strategy Narrative [Text Block] Normally investing primarily in income-producing debt securities, preferred stocks, and convertible securities. Normally investing at least 80% of assets in below investment grade debt securities. 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).  Below investment grade debt securities are debt securities that are rated below BBB- or its equivalent by at least one nationally recognized statistical ratings organization (NRSRO), or, if unrated, determined by the Adviser to be of comparable quality. 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 securities rated BB by Standard & Poor's (S&P), Ba by Moody's Investors Service (Moody's), comparably rated by at least one nationally recognized credit rating agency, or, if unrated, considered by Fidelity Management & Research Company LLC (FMR) to be of comparable quality. Potentially investing in securities that have a higher or lower credit quality. Potentially investing in non-income producing securities, including defaulted securities and common stocks. Investing in companies in troubled or uncertain financial condition. 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 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 Mar. 31, 2026                                
Bar Chart, Year to Date Return (0.14%)                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Mar. 31, 2019                                
Highest Quarterly Return 7.66%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Mar. 31, 2020                                
Lowest Quarterly Return (9.42%)                                
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.                                
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Focused High Income Fund | After Taxes on Distributions | Fidelity Focused High Income Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   6.44%                       1.27%     3.06%
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Focused High Income Fund | After Taxes on Distributions and Sales | Fidelity Focused High 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   5.21%                       1.58%     2.99%
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Focused High 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%
FidelityCapitalIncomeFundHighIncomeFundFocusedHighIncomeFund-RetailComboPRO | Fidelity Focused High Income Fund | ML039                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   ICE® BofA® BB US High Yield Constrained Index                              
Average Annual Return, Percent   8.93%                       3.78%     5.95%
FidelitySAIHighIncomeFund-PRO | Fidelity SAI High Income Fund | Fidelity SAI High 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): 0.01%                                
Acquired Fund Fees and Expenses [39] 0.14%                                
Expenses (as a percentage of Assets) [39] 0.68%                                
Expense Example, with Redemption, 1 Year $ 69                                
Expense Example, with Redemption, 3 Years 218                                
Expense Example, with Redemption, 5 Years 379                                
Expense Example, with Redemption, 10 Years $ 847                                
Annual Return, Inception Date May 13, 2021                                
Average Annual Return, Label [Optional Text]   Return Before Taxes                              
Average Annual Return, Percent   10.23%                       4.41% [40]      
Annual Return [Percent]     10.23% 9.75% 10.76% (10.96%)                      
FidelitySAIHighIncomeFund-PRO | Fidelity SAI High Income Fund                                  
Prospectus Line Items                                  
Risk/Return [Heading] Fund Summary Fund: Fidelity® SAI High Income Fund                                
Objective [Heading] Investment Objective                                
Objective, Primary [Text Block] Fidelity® SAI High Income Fund seeks a high level of current income. Growth of capital may also be considered.                                
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 90 % of the average value of its portfolio.                                
Portfolio Turnover, Rate 90.00%                                
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 income-producing debt securities, preferred stocks, and convertible securities. Normally investing at least 80% of assets in below investment grade debt securities. 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).  Below investment grade debt securities are debt securities that are rated below BBB- or its equivalent by at least one nationally recognized statistical ratings organization (NRSRO), or, if unrated, determined by the Adviser to be of comparable quality. 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. Potentially investing in non-income producing securities, including defaulted securities and common stocks. Investing in companies in troubled or uncertain financial condition. Using the credit quality distribution of an index representing the overall high yield bond market, currently the ICE® BofA® US High Yield Constrained Index, as a guide in structuring the fund's credit quality composition. 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 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 Mar. 31, 2026                                
Bar Chart, Year to Date Return 0.51%                                
Highest Quarterly Return, Label [Optional Text]    Highest Quarter Return                                
Highest Quarterly Return, Date Dec. 31, 2023                                
Highest Quarterly Return 6.40%                                
Lowest Quarterly Return, Label [Optional Text]    Lowest Quarter Return                                
Lowest Quarterly Return, Date Jun. 30, 2022                                
Lowest Quarterly Return (10.02%)                                
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.                                
FidelitySAIHighIncomeFund-PRO | Fidelity SAI High Income Fund | After Taxes on Distributions | Fidelity SAI High Income Fund                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Return After Taxes on Distributions                              
Average Annual Return, Percent   7.39%                       2.13% [40]      
FidelitySAIHighIncomeFund-PRO | Fidelity SAI High Income Fund | After Taxes on Distributions and Sales | Fidelity SAI High 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   5.99%                       2.35% [40]      
FidelitySAIHighIncomeFund-PRO | Fidelity SAI High Income Fund | LB091                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   Bloomberg U.S. Universal Bond Index                              
Average Annual Return, Percent   7.58%                       0.61%      
FidelitySAIHighIncomeFund-PRO | Fidelity SAI High Income Fund | ML040                                  
Prospectus Line Items                                  
Average Annual Return, Label [Optional Text]   ICE® BofA® US High Yield Constrained Index                              
Average Annual Return, Percent   8.50%                       4.43%      
Document Type 485BPOS                                
Registrant Name Fidelity Summer Street Trust                                
[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 Includes interest expense of certain underlying Fidelity ® funds. Excluding interest expense of the applicable underlying Fidelity ® funds, total annual operating expenses are 0.96% , 0.96% , 1. 71% , 0. 71% , and 0. 61% for Class A, Class M, Class C, Class I, and Class Z, respectively.
[3]
A From December 4, 2018 .
[4]
B From December 4, 2018 .
[5]
B On Class C shares redeemed less than one year after purchase.
[6]
C From December 4, 2018 .
[7]
D From December 4, 2018 .
[8]
E From December 4, 2018 .
[9]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.10% based on the performance of the fund or a designated class of the fund relative to that of the Russell 3000® Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[10]
A From May 1, 2019 .
[11]
A Includes interest expense of certain underlying Fidelity ® funds. Excluding interest expense of the applicable underlying Fidelity ® funds, total annual operating expenses after fee waiver and/or expense reimbursement   are 0.01%.
[12]
B The fund may invest in a business development company (BDC) advised by Fidelity Management & Research Company LLC (FMR) or its affiliates. FMR has contractually agreed to waive its management fee or reimburse the fund, as applicable, with respect to the portion of the fund's assets invested in such BDC. This arrangement is in effect through August 31, 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.
[13]
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.
[14]
A The management fee comprises a basic fee, which may vary by class, that is adjusted up or down by a maximum of 0.10% based on the performance of the fund or a designated class of the fund relative to that of the Russell 3000® Index. Please see "Fund Services - Fund Management - Advisory Fee(s)" for additional information.
[15]
A From May 1, 2019 .
[16]
B From May 1, 2019 .
[17]
B On Class C shares redeemed less than one year after purchase.
[18]
C From May 1, 2019 .
[19]
D From May 1, 2019 .
[20]
E From May 1, 2019 .
[21]
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.
[22]
A Fidelity Management & Research Company LLC (FMR) has contractually agreed to reimburse Class A, Class M, Class C, and Class Z 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 their respective average net assets, exceed 1.00%, 1.00%, 1.75%, and 0.66% (the Expense Caps). If at any time during the current fiscal year expenses for Class A, Class M, Class C, or Class Z of the fund fall below the Expense Caps, 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 Caps. These arrangements will remain in effect through August 31, 2027 . FMR may not terminate these arrangements before the expiration date without the approval of the Board of Trustees and may extend them in its discretion after that date.
[23]
B On Class C shares redeemed less than one year after purchase.
[24]
A From October 2, 2018 .
[25]
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.
[26]
A Fidelity Management & Research Company LLC (FMR) has contractually agreed to reimburse Class A, Class M, Class C, Class I, and Class Z 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 their respective average net assets, exceed 1.30%, 1.55%, 2.05%, 1.05%, and 0.90% (the Expense Caps). If at any time during the current fiscal year expenses for Class A, Class M, Class C, Class I, or Class Z of the fund fall below the Expense Caps, 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 Caps. These arrangements will remain in effect through August 31, 2027 . FMR may not terminate these arrangements before the expiration date without the approval of the Board of Trustees and may extend them in its discretion after that date.
[27]
A From May 24, 2022 .
[28]
B From May 24, 2022 .
[29]
B On Class C shares redeemed less than one year after purchase.
[30]
C From May 24, 2022 .
[31]
D From May 24, 2022 .
[32]
E From May 24, 2022 .
[33]
A Fidelity Management & Research Company LLC (FMR) has contractually agreed to reimburse the class of 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 1.05% (the Expense Cap). If at any time during the current fiscal year expenses for the class of 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 August 31, 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.
[34]
A From May 24, 2022 .
[35]
A Includes interest expense of certain underlying Fidelity ® funds. Excluding interest expense of the applicable underlying Fidelity ® funds, total annual operating expenses are 0. 67% .
[36]
A Includes interest expense of certain underlying Fidelity ® funds. Excluding interest expense of the applicable underlying Fidelity ® funds, total annual operating expenses after fee waiver and/or expense reimbursement are 0. 66% .
[37]
B The fund may invest in a business development company (BDC) advised by Fidelity Management & Research Company LLC (FMR) or its affiliates. FMR has contractually agreed to waive its management fee or reimburse the fund, as applicable, with respect to the portion of the fund's assets invested in such BDC. This arrangement is in effect through August 31, 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.
[38]
A Fidelity Management & Research Company LLC (FMR) has contractually agreed to reimburse 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 0.75% (the Expense Cap). If at any time during the current fiscal year expenses for 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 August 31, 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.
[39]
A Includes interest expense of certain underlying Fidelity ® funds. Excluding interest expense of the applicable underlying Fidelity ® funds, total annual operating expenses are 0. 57% .
[40]
A From May 13, 2021 .