Investment Risks |
Sep. 29, 2026 |
|---|---|
| FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | SmallCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Small Cap Investing. The value of securities of smaller, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | HighPortfolioTurnoverMember | |
| Prospectus Line Items | |
| Risk [Text Block] | High Portfolio Turnover. High portfolio turnover (more than 100%) may result in increased transaction costs and potentially higher capital gains or losses. The effects of higher than normal portfolio turnover may adversely affect the fund's performance. |
| FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelitySmallCapValueFund-AMCIZPRO | Fidelity Small Cap Value Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | Risk Nondiversified Status [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | In addition, the fund is classified as non-diversified under the Investment Company Act of 1940 (1940 Act), which means that it has the ability to invest a greater portion of assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund. |
| FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | TechnologyIndustryConcentrationMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Technology Industry Concentration. The technology industries can be significantly affected by obsolescence of existing technology, short product cycles, falling prices and profits, competition from new market entrants, and general economic conditions. |
| FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. The value of securities of smaller issuers can be more volatile than that of larger issuers. |
| FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityOTCPortfolio-KPRO | Fidelity OTC Portfolio | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | Risk Nondiversified Status [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | In addition, the fund is classified as non-diversified under the Investment Company Act of 1940 (1940 Act), which means that it has the ability to invest a greater portion of assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Growth Fund | MidCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Mid Cap Investing. The value of securities of medium size, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-RetailComboPRO | Fidelity Blue Chip Value Fund | MidCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Mid Cap Investing. The value of securities of medium size, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | Risk Nondiversified Status [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | In addition, the fund is classified as non-diversified under the Investment Company Act of 1940 (1940 Act), which means that it has the ability to invest a greater portion of assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund. |
| FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | TechnologyIndustryConcentrationMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Technology Industry Concentration. The technology industries can be significantly affected by obsolescence of existing technology, short product cycles, falling prices and profits, competition from new market entrants, and general economic conditions. |
| FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. The value of securities of smaller issuers can be more volatile than that of larger issuers. |
| FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityOTCK6Portfolio-PRO | Fidelity OTC K6 Portfolio | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments. |
| FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | HighlyLeveragedCompanyExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Highly Leveraged Company Exposure. Leverage can magnify the impact of adverse issuer, political, regulatory, market, or economic developments on a company. |
| FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityLeveragedCompanyStockFund-RetailPRO | Fidelity Leveraged Company Stock Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments. |
| FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityGrowthIncomePortfolio-KPRO | Fidelity Growth & Income Portfolio | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | RealEstateIndustryConcentrationMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Real Estate Industry Concentration. Changes in real estate values or economic downturns can have a significant negative effect on issuers in the real estate industry. The value of securities of issuers in the real estate industry can be affected by changes in real estate values and rental income, property taxes, interest rates, tax and regulatory requirements, and the management skill and creditworthiness of the issuer. |
| FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments and can be difficult to resell. Lower-quality debt securities can be thinly traded or have restrictions on resale, making them difficult to sell at an acceptable price, and often are considered to be speculative. Investments in covenant-lite loans carry more risk than traditional loans as they allow issuers to engage in activities that would otherwise be difficult or impossible under a traditional loan agreement. In the event of default, covenant-lite obligations have lower recovery values as the lender may not have the opportunity to negotiate with the borrower prior to default. |
| FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityRealEstateIncomeFund-RetailPRO | Fidelity Real Estate Income Fund | PrepaymentMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change. |
| FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund | SmallCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Small Cap Investing. The value of securities of smaller, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund | HighPortfolioTurnoverMember | |
| Prospectus Line Items | |
| Risk [Text Block] | High Portfolio Turnover. High portfolio turnover (more than 100%) may result in increased transaction costs and potentially higher capital gains or losses. The effects of higher than normal portfolio turnover may adversely affect the fund's performance. |
| FidelitySmallCapGrowthK6Fund-PRO | Fidelity Small Cap Growth K6 Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | Risk Nondiversified Status [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | In addition, the fund is classified as non-diversified under the Investment Company Act of 1940 (1940 Act), which means that it has the ability to invest a greater portion of assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund. |
| FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | TechnologyIndustryConcentrationMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Technology Industry Concentration. The technology industries can be significantly affected by obsolescence of existing technology, short product cycles, falling prices and profits, competition from new market entrants, and general economic conditions. |
| FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. The value of securities of smaller issuers can be more volatile than that of larger issuers. |
| FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityOTCPortfolio-AMCIZPRO | Fidelity OTC Portfolio | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelitySAIRealEstateIncomeFund-PRO | Fidelity SAI Real Estate Income Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelitySAIRealEstateIncomeFund-PRO | Fidelity SAI Real Estate Income Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelitySAIRealEstateIncomeFund-PRO | Fidelity SAI Real Estate Income Fund | RealEstateIndustryConcentrationMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Real Estate Industry Concentration. Changes in real estate values or economic downturns can have a significant negative effect on issuers in the real estate industry. The value of securities of issuers in the real estate industry can be affected by changes in real estate values and rental income, property taxes, interest rates, tax and regulatory requirements, and the management skill and creditworthiness of the issuer. |
| FidelitySAIRealEstateIncomeFund-PRO | Fidelity SAI Real Estate Income Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments and can be difficult to resell. Lower-quality debt securities can be thinly traded or have restrictions on resale, making them difficult to sell at an acceptable price, and often are considered to be speculative. Investments in covenant-lite loans carry more risk than traditional loans as they allow issuers to engage in activities that would otherwise be difficult or impossible under a traditional loan agreement. In the event of default, covenant-lite obligations have lower recovery values as the lender may not have the opportunity to negotiate with the borrower prior to default. |
| FidelitySAIRealEstateIncomeFund-PRO | Fidelity SAI Real Estate Income Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelitySAIRealEstateIncomeFund-PRO | Fidelity SAI Real Estate Income Fund | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelitySAIRealEstateIncomeFund-PRO | Fidelity SAI Real Estate Income Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelitySAIRealEstateIncomeFund-PRO | Fidelity SAI Real Estate Income Fund | PrepaymentMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change. |
| FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | RealEstateIndustryConcentrationMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Real Estate Industry Concentration. Changes in real estate values or economic downturns can have a significant negative effect on issuers in the real estate industry. The value of securities of issuers in the real estate industry can be affected by changes in real estate values and rental income, property taxes, interest rates, tax and regulatory requirements, and the management skill and creditworthiness of the issuer. |
| FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments and can be difficult to resell. Investments in covenant-lite loans carry more risk than traditional loans as they allow issuers to engage in activities that would otherwise be difficult or impossible under a traditional loan agreement. In the event of default, covenant-lite obligations have lower recovery values as the lender may not have the opportunity to negotiate with the borrower prior to default. |
| FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelitySeriesRealEstateIncomeFund-PRO | Fidelity Series Real Estate Income Fund | PrepaymentMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change. |
| FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments. |
| FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityGrowthIncomePortfolio-AMCIZPro | Fidelity Growth & Income Portfolio | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | Risk Nondiversified Status [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | In addition, the fund is classified as non-diversified under the Investment Company Act of 1940 (1940 Act), which means that it has the ability to invest a greater portion of assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund. |
| FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | TechnologyIndustryConcentrationMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Technology Industry Concentration. The technology industries can be significantly affected by obsolescence of existing technology, short product cycles, falling prices and profits, competition from new market entrants, and general economic conditions. |
| FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. The value of securities of smaller issuers can be more volatile than that of larger issuers. |
| FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityOTCPortfolio-RetailPRO | Fidelity OTC Portfolio | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | Risk Nondiversified Status [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | In addition, the fund is classified as non-diversified under the Investment Company Act of 1940 (1940 Act), which means that it has the ability to invest a greater portion of assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund. |
| FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelitySeriesBlueChipGrowthFund-PRO | Fidelity Series Blue Chip Growth Fund | MidCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Mid Cap Investing. The value of securities of medium size, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelityBlueChipGrowthK6Fund-PRO | Fidelity Blue Chip Growth K6 Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityBlueChipGrowthK6Fund-PRO | Fidelity Blue Chip Growth K6 Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityBlueChipGrowthK6Fund-PRO | Fidelity Blue Chip Growth K6 Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityBlueChipGrowthK6Fund-PRO | Fidelity Blue Chip Growth K6 Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelityBlueChipGrowthK6Fund-PRO | Fidelity Blue Chip Growth K6 Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityBlueChipGrowthK6Fund-PRO | Fidelity Blue Chip Growth K6 Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityBlueChipGrowthK6Fund-PRO | Fidelity Blue Chip Growth K6 Fund | MidCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Mid Cap Investing. The value of securities of medium size, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | Risk Nondiversified Status [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | In addition, the fund is classified as non-diversified under the Investment Company Act of 1940 (1940 Act), which means that it has the ability to invest a greater portion of assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Growth Fund | MidCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Mid Cap Investing. The value of securities of medium size, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityBlueChipGrowthFundFidelityBlueChipValueFund-AMCIZPRO | Fidelity Blue Chip Value Fund | MidCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Mid Cap Investing. The value of securities of medium size, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityDividendGrowthFund-KPRO | Fidelity Dividend Growth Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityDividendGrowthFund-AMCIZPro | Fidelity Dividend Growth Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments. |
| FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | HighlyLeveragedCompanyExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Highly Leveraged Company Exposure. Leverage can magnify the impact of adverse issuer, political, regulatory, market, or economic developments on a company. |
| FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityLeveragedCompanyStockFund-KPRO | Fidelity Leveraged Company Stock Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityDividendGrowthFund-RetailPRO | Fidelity Dividend Growth Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | Risk Nondiversified Status [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | In addition, the fund is classified as non-diversified under the Investment Company Act of 1940 (1940 Act), which means that it has the ability to invest a greater portion of assets in securities of a smaller number of individual issuers than a diversified fund. As a result, changes in the market value of a single investment could cause greater fluctuations in share price than would occur in a more diversified fund. |
| FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityBlueChipGrowthFund-KPRO | Fidelity Blue Chip Growth Fund | MidCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Mid Cap Investing. The value of securities of medium size, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments. |
| FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | HighlyLeveragedCompanyExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Highly Leveraged Company Exposure. Leverage can magnify the impact of adverse issuer, political, regulatory, market, or economic developments on a company. |
| FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityLeveragedCompanyStockFund-AMCIZPRO | Fidelity Leveraged Company Stock Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets, particularly emerging markets, can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | RealEstateIndustryConcentrationMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Real Estate Industry Concentration. Changes in real estate values or economic downturns can have a significant negative effect on issuers in the real estate industry. The value of securities of issuers in the real estate industry can be affected by changes in real estate values and rental income, property taxes, interest rates, tax and regulatory requirements, and the management skill and creditworthiness of the issuer. |
| FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments and can be difficult to resell. Lower-quality debt securities can be thinly traded or have restrictions on resale, making them difficult to sell at an acceptable price, and often are considered to be speculative. Investments in covenant-lite loans carry more risk than traditional loans as they allow issuers to engage in activities that would otherwise be difficult or impossible under a traditional loan agreement. In the event of default, covenant-lite obligations have lower recovery values as the lender may not have the opportunity to negotiate with the borrower prior to default. |
| FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityRealEstateIncomeFund-AMCIZPRO | Fidelity Real Estate Income Fund | PrepaymentMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | SmallCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Small Cap Investing. The value of securities of smaller, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | HighPortfolioTurnoverMember | |
| Prospectus Line Items | |
| Risk [Text Block] | High Portfolio Turnover. High portfolio turnover (more than 100%) may result in increased transaction costs and potentially higher capital gains or losses. The effects of higher than normal portfolio turnover may adversely affect the fund's performance. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Value Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | SmallCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Small Cap Investing. The value of securities of smaller, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelitySmallCapGrowthFundFidelitySmallCapValueFund-RetailComboPRO | Fidelity Small Cap Growth Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | SmallCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Small Cap Investing. The value of securities of smaller, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelitySeriesSmallCapOpportunitiesFund-PRO | Fidelity Series Small Cap Opportunities Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. |
| FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | SmallCapInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Small Cap Investing. The value of securities of smaller, less well-known issuers can perform differently from the market as a whole and other types of stocks and can be more volatile than that of larger issuers. |
| FidelitySmallCapGrowthFund-AMCIZPRO | Fidelity Small Cap Growth Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | GrowthInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Growth" Investing. "Growth" stocks can perform differently from the market as a whole and other types of stocks and can be more volatile than other types of stocks. |
| FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments. |
| FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | ValueInvestingMember | |
| Prospectus Line Items | |
| Risk [Text Block] | "Value" Investing. "Value" stocks can perform differently from the market as a whole and other types of stocks and can continue to be undervalued by the market for long periods of time. |
| FidelityGrowthIncomePortfolio-RetailPRO | Fidelity Growth & Income Portfolio | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency . |
| FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | RealEstateIndustryConcentrationMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Real Estate Industry Concentration. Changes in real estate values or economic downturns can have a significant negative effect on issuers in the real estate industry. The value of securities of issuers in the real estate industry can be affected by changes in real estate values and rental income, property taxes, interest rates, tax and regulatory requirements, and the management skill and creditworthiness of the issuer. |
| FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | FluctuationOfNetAssetValueAndSharePriceMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Fluctuation of Net Asset Value and Share Price. The net asset value per share (NAV) of the fund's ETF Class will generally fluctuate with changes in the market value of the fund's holdings. The fund's ETF Class shares can be bought and sold in the secondary market at market prices. Disruptions to creations and redemptions, the existence of extreme market volatility or potential lack of an active trading market for the fund's ETF Class shares may result in the fund's ETF Class shares trading significantly above (at a premium) or below (at a discount) to NAV. Given the nature of the relevant markets for certain of the fund's securities, the fund's ETF Class shares may trade at a larger premium or discount to the NAV than shares of other ETFs. In addition, in stressed market conditions or periods of market disruption or volatility, the market for the fund's ETF Class shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings. |
| FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | IssuerSpecificChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Issuer-Specific Changes. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole. Lower-quality debt securities (those of less than investment-grade quality, also referred to as high yield debt securities or junk bonds) and certain types of other securities involve greater risk of default or price changes due to changes in the credit quality of the issuer. The value of lower-quality debt securities and certain types of other securities can be more volatile due to increased sensitivity to adverse issuer, political, regulatory, market, or economic developments and can be difficult to resell. Lower-quality debt securities can be thinly traded or have restrictions on resale, making them difficult to sell at an acceptable price, and often are considered to be speculative. Investments in covenant-lite loans carry more risk than traditional loans as they allow issuers to engage in activities that would otherwise be difficult or impossible under a traditional loan agreement. In the event of default, covenant-lite obligations have lower recovery values as the lender may not have the opportunity to negotiate with the borrower prior to default. |
| FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | StockMarketVolatilityMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Stock Market Volatility. Stock markets are volatile and can decline significantly in response to adverse issuer, political, regulatory, market, or economic developments. Different parts of the market, including different market sectors, and different types of securities can react differently to these developments. |
| FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | InterestRateChangesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Interest Rate Changes. Interest rate increases can cause the price of a debt security to decrease. |
| FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | CashTransactionsRiskMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Cash Transactions Risk. The fund may effect some or all creations and redemptions of its ETF Class shares using cash rather than in-kind securities. As a result, an investment in the fund may be less tax-efficient than an investment in a fund that effects ETF share class redemptions entirely in-kind. |
| FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | TradingIssuesMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Trading Issues. There can be no assurance that an active trading market will be maintained. Market makers and Authorized Participants are not obligated to make a market in the fund's ETF Class shares or to submit purchase and redemption orders for creation units. Decisions by market makers or Authorized Participants to reduce their role with respect to market making or creation and redemption activities during times of market stress, or a decline in the number of Authorized Participants due to decisions to exit the business, bankruptcy, or other factors, could inhibit the effectiveness of the arbitrage process in maintaining the relationship between the underlying value of the fund's portfolio securities and the market price of the fund's ETF Class shares. In addition, trading may be halted, for example, due to market conditions. |
| FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | ForeignExposureMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Foreign Exposure. Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market. |
| FidelityRealEstateIncomeFund-ETFClassPRO | Fidelity Real Estate Income Fund | PrepaymentMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Prepayment. The ability of an issuer of a debt security to repay principal prior to a security's maturity can cause greater price volatility if interest rates change. |
| Document Type | 485BPOS |