v3.26.1
Investment Risks
Jul. 30, 2026
FidelityClimateActionFund-AMCIZPRO | Fidelity Climate Action Fund | Risk Lose Money [Member]  
Prospectus Line Items  
Risk [Text Block]   You could lose money by investing in the fund.
FidelityClimateActionFund-AMCIZPRO | Fidelity Climate Action 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 .
FidelityClimateActionFund-AMCIZPRO | Fidelity Climate Action 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.      
FidelityClimateActionFund-AMCIZPRO | Fidelity Climate Action 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.
FidelityClimateActionFund-AMCIZPRO | Fidelity Climate Action 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.
FidelityClimateActionFund-AMCIZPRO | Fidelity Climate Action Fund | SmallAndMidCapInvestingMember  
Prospectus Line Items  
Risk [Text Block] Small- and Mid-Cap Investing. The value of securities of small to 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.
FidelityClimateActionFund-AMCIZPRO | Fidelity Climate Action Fund | ManagementRiskMember  
Prospectus Line Items  
Risk [Text Block] Management Risk. The Adviser's application of the fund's strategy criteria may not achieve its intended results. The fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies .
FidelityClimateActionFund-AMCIZPRO | Fidelity Climate Action 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.
FidelityClimateActionFund-AMCIZPRO | Fidelity Climate Action 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.
FidelityClimateActionFund-AMCIZPRO | Fidelity Climate Action Fund | SustainabilityRiskMember  
Prospectus Line Items  
Risk [Text Block] Sustainability Risk. Application of Fidelity Management & Research Company LLC's (FMR) (the Adviser) environmental, social and governance (ESG) rating process and/or its sustainable investing exclusion criteria may affect the fund's exposure to certain issuers, sectors, regions, and countries and may affect the fund's performance depending on whether certain investments are in or out of favor. The criteria related to the fund's ESG rating process and/or adherence to its sustainable investing exclusion criteria may result in the fund forgoing opportunities to buy certain securities when it might otherwise be advantageous to do so, or selling securities for ESG reasons when it might be otherwise disadvantageous for it to do so. As a result, the fund's performance may at times be better or worse than the performance of funds that do not use ESG or sustainability criteria. There are significant differences in interpretations of what it means for an issuer to have positive ESG factors. While the Adviser believes its definitions are reasonable, the portfolio decisions it makes may differ with other investors' or advisers' views. When evaluating an issuer, the Adviser is dependent on information or data obtained through voluntary or third-party reporting that may be incomplete, inaccurate, or unavailable, which could cause the Adviser to incorrectly assess an issuer's business practices.
FidelityClimateActionFund-AMCIZPRO | Fidelity Climate Action Fund | ClimateFocusRiskMember  
Prospectus Line Items  
Risk [Text Block] Climate Focus Risk. Because the fund focuses its investments in equity securities of climate aware companies, it will be more susceptible to events or factors affecting these companies. The fund is particularly exposed to such developments as changes in global and regional climates, environmental protection regulatory actions, changes in government standards and subsidy levels, changes in taxation and other domestic and international political, regulatory, and economic developments.
FidelitySustainableUSEquityFund-AMCIZPRO | Fidelity Sustainable U.S. Equity Fund | Risk Lose Money [Member]  
Prospectus Line Items  
Risk [Text Block]   You could lose money by investing in the fund.
FidelitySustainableUSEquityFund-AMCIZPRO | Fidelity Sustainable U.S. Equity 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 .
FidelitySustainableUSEquityFund-AMCIZPRO | Fidelity Sustainable U.S. Equity 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.
FidelitySustainableUSEquityFund-AMCIZPRO | Fidelity Sustainable U.S. Equity 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.
FidelitySustainableUSEquityFund-AMCIZPRO | Fidelity Sustainable U.S. Equity Fund | SmallAndMidCapInvestingMember  
Prospectus Line Items  
Risk [Text Block] Small- and Mid-Cap Investing. The value of securities of small to 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.
FidelitySustainableUSEquityFund-AMCIZPRO | Fidelity Sustainable U.S. Equity Fund | ManagementRiskMember  
Prospectus Line Items  
Risk [Text Block] Management Risk. The Adviser's application of the fund's strategy criteria may not achieve its intended results. The fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies .
FidelitySustainableUSEquityFund-AMCIZPRO | Fidelity Sustainable U.S. Equity 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.
FidelitySustainableUSEquityFund-AMCIZPRO | Fidelity Sustainable U.S. Equity Fund | SustainabilityRiskMember  
Prospectus Line Items  
Risk [Text Block] Sustainability Risk. Application of Fidelity Management & Research Company LLC's (FMR) (the Adviser) ESG rating process and/or its sustainable investing exclusion criteria may affect the fund's exposure to certain issuers, sectors, regions, and countries and may affect the fund's performance depending on whether certain investments are in or out of favor. The criteria related to the fund's ESG rating process and/or adherence to its sustainable investing exclusion criteria may result in the fund forgoing opportunities to buy certain securities when it might otherwise be advantageous to do so, or selling securities for ESG reasons when it might be otherwise disadvantageous for it to do so. As a result, the fund's performance may at times be better or worse than the performance of funds that do not use ESG or sustainability criteria. There are significant differences in interpretations of what it means for an issuer to have positive ESG factors. While the Adviser believes its definitions are reasonable, the portfolio decisions it makes may differ with other investors' or advisers' views. When evaluating an issuer, the Adviser is dependent on information or data obtained through voluntary or third-party reporting that may be incomplete, inaccurate, or unavailable, which could cause the Adviser to incorrectly assess an issuer's business practices.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable Sector Fund | Risk Lose Money [Member]  
Prospectus Line Items  
Risk [Text Block]   You could lose money by investing in the fund.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable Sector 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 .
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable Sector Fund | UnderlyingStrategyRiskMember  
Prospectus Line Items  
Risk [Text Block] Underlying Strategy Risk. The investment universe consists of the holdings of an all-cap core sector-based strategy. Such securities may not represent all securities in a particular sector, nor those with the strongest ESG characteristics. In addition, the fund may sell a security for reasons that are not related to its ESG characteristics because the underlying strategy no longer includes such security.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable Sector 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.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable Sector 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.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable Sector Fund | SmallAndMidCapInvestingMember  
Prospectus Line Items  
Risk [Text Block] Small- and Mid-Cap Investing. The value of securities of small to 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.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable Sector Fund | ManagementRiskMember  
Prospectus Line Items  
Risk [Text Block] Management Risk. The Adviser's application of the fund's strategy criteria may not achieve its intended results. The fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies .
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable Sector Fund | QuantitativeInvestingMember  
Prospectus Line Items  
Risk [Text Block] Quantitative Investing. Securities selected using quantitative analysis can perform differently from the market as a whole as a result of the factors used in the analysis, the weight placed on each factor, and changes in the factors' historical trends.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable Sector 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.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable Sector Fund | SustainabilityRiskMember  
Prospectus Line Items  
Risk [Text Block] Sustainability Risk. Application of Fidelity Management & Research Company LLC's (FMR) (the Adviser) ESG rating process and/or its sustainable investing exclusion criteria may affect the fund's exposure to certain issuers, sectors, regions, and countries and may affect the fund's performance depending on whether certain investments are in or out of favor. The criteria related to the fund's ESG rating process and/or adherence to its sustainable investing exclusion criteria may result in the fund forgoing opportunities to buy certain securities when it might otherwise be advantageous to do so, or selling securities for ESG reasons when it might be otherwise disadvantageous for it to do so. As a result, the fund's performance may at times be better or worse than the performance of funds that do not use ESG or sustainability criteria. There are significant differences in interpretations of what it means for an issuer to have positive ESG factors. While the Adviser believes its definitions are reasonable, the portfolio decisions it makes may differ with other investors' or advisers' views. When evaluating an issuer, the Adviser is dependent on information or data obtained through voluntary or third-party reporting that may be incomplete, inaccurate, or unavailable, which could cause the Adviser to incorrectly assess an issuer's business practices.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable U.S. Equity Fund | Risk Lose Money [Member]  
Prospectus Line Items  
Risk [Text Block]   You could lose money by investing in the fund.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable U.S. Equity 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 .
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable U.S. Equity 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.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable U.S. Equity 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.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable U.S. Equity Fund | SmallAndMidCapInvestingMember  
Prospectus Line Items  
Risk [Text Block] Small- and Mid-Cap Investing. The value of securities of small to 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.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable U.S. Equity Fund | ManagementRiskMember  
Prospectus Line Items  
Risk [Text Block] Management Risk. The Adviser's application of the fund's strategy criteria may not achieve its intended results. The fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies .
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable U.S. Equity 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.
FidelitySAISustainableSectorFundFidelitySAISustainableUSEquityFund-ComboPRO | Fidelity SAI Sustainable U.S. Equity Fund | SustainabilityRiskMember  
Prospectus Line Items  
Risk [Text Block] Sustainability Risk. Application of Fidelity Management & Research Company LLC's (FMR) (the Adviser) ESG rating process and/or its sustainable investing exclusion criteria may affect the fund's exposure to certain issuers, sectors, regions, and countries and may affect the fund's performance depending on whether certain investments are in or out of favor. The criteria related to the fund's ESG rating process and/or adherence to its sustainable investing exclusion criteria may result in the fund forgoing opportunities to buy certain securities when it might otherwise be advantageous to do so, or selling securities for ESG reasons when it might be otherwise disadvantageous for it to do so. As a result, the fund's performance may at times be better or worse than the performance of funds that do not use ESG or sustainability criteria. There are significant differences in interpretations of what it means for an issuer to have positive ESG factors. While the Adviser believes its definitions are reasonable, the portfolio decisions it makes may differ with other investors' or advisers' views. When evaluating an issuer, the Adviser is dependent on information or data obtained through voluntary or third-party reporting that may be incomplete, inaccurate, or unavailable, which could cause the Adviser to incorrectly assess an issuer's business practices.
FidelitySustainableUSEquityFund-RetailPRO | Fidelity Sustainable U.S. Equity Fund | Risk Lose Money [Member]  
Prospectus Line Items  
Risk [Text Block]   You could lose money by investing in the fund.
FidelitySustainableUSEquityFund-RetailPRO | Fidelity Sustainable U.S. Equity 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 .
FidelitySustainableUSEquityFund-RetailPRO | Fidelity Sustainable U.S. Equity 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.
FidelitySustainableUSEquityFund-RetailPRO | Fidelity Sustainable U.S. Equity 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.
FidelitySustainableUSEquityFund-RetailPRO | Fidelity Sustainable U.S. Equity Fund | SmallAndMidCapInvestingMember  
Prospectus Line Items  
Risk [Text Block] Small- and Mid-Cap Investing. The value of securities of small to 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.
FidelitySustainableUSEquityFund-RetailPRO | Fidelity Sustainable U.S. Equity Fund | ManagementRiskMember  
Prospectus Line Items  
Risk [Text Block] Management Risk. The Adviser's application of the fund's strategy criteria may not achieve its intended results. The fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies .
FidelitySustainableUSEquityFund-RetailPRO | Fidelity Sustainable U.S. Equity 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.
FidelitySustainableUSEquityFund-RetailPRO | Fidelity Sustainable U.S. Equity Fund | SustainabilityRiskMember  
Prospectus Line Items  
Risk [Text Block] Sustainability Risk. Application of Fidelity Management & Research Company LLC's (FMR) (the Adviser) ESG rating process and/or its sustainable investing exclusion criteria may affect the fund's exposure to certain issuers, sectors, regions, and countries and may affect the fund's performance depending on whether certain investments are in or out of favor. The criteria related to the fund's ESG rating process and/or adherence to its sustainable investing exclusion criteria may result in the fund forgoing opportunities to buy certain securities when it might otherwise be advantageous to do so, or selling securities for ESG reasons when it might be otherwise disadvantageous for it to do so. As a result, the fund's performance may at times be better or worse than the performance of funds that do not use ESG or sustainability criteria. There are significant differences in interpretations of what it means for an issuer to have positive ESG factors. While the Adviser believes its definitions are reasonable, the portfolio decisions it makes may differ with other investors' or advisers' views. When evaluating an issuer, the Adviser is dependent on information or data obtained through voluntary or third-party reporting that may be incomplete, inaccurate, or unavailable, which could cause the Adviser to incorrectly assess an issuer's business practices.
FidelityClimateActionFund-RetailPRO | Fidelity Climate Action Fund | Risk Lose Money [Member]  
Prospectus Line Items  
Risk [Text Block]   You could lose money by investing in the fund.
FidelityClimateActionFund-RetailPRO | Fidelity Climate Action 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 .
FidelityClimateActionFund-RetailPRO | Fidelity Climate Action 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.      
FidelityClimateActionFund-RetailPRO | Fidelity Climate Action 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.
FidelityClimateActionFund-RetailPRO | Fidelity Climate Action 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.
FidelityClimateActionFund-RetailPRO | Fidelity Climate Action Fund | SmallAndMidCapInvestingMember  
Prospectus Line Items  
Risk [Text Block] Small- and Mid-Cap Investing. The value of securities of small to 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.
FidelityClimateActionFund-RetailPRO | Fidelity Climate Action Fund | ManagementRiskMember  
Prospectus Line Items  
Risk [Text Block] Management Risk. The Adviser's application of the fund's strategy criteria may not achieve its intended results. The fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies .
FidelityClimateActionFund-RetailPRO | Fidelity Climate Action 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.
FidelityClimateActionFund-RetailPRO | Fidelity Climate Action 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.
FidelityClimateActionFund-RetailPRO | Fidelity Climate Action Fund | SustainabilityRiskMember  
Prospectus Line Items  
Risk [Text Block] Sustainability Risk. Application of Fidelity Management & Research Company LLC's (FMR) (the Adviser) environmental, social and governance (ESG) rating process and/or its sustainable investing exclusion criteria may affect the fund's exposure to certain issuers, sectors, regions, and countries and may affect the fund's performance depending on whether certain investments are in or out of favor. The criteria related to the fund's ESG rating process and/or adherence to its sustainable investing exclusion criteria may result in the fund forgoing opportunities to buy certain securities when it might otherwise be advantageous to do so, or selling securities for ESG reasons when it might be otherwise disadvantageous for it to do so. As a result, the fund's performance may at times be better or worse than the performance of funds that do not use ESG or sustainability criteria. There are significant differences in interpretations of what it means for an issuer to have positive ESG factors. While the Adviser believes its definitions are reasonable, the portfolio decisions it makes may differ with other investors' or advisers' views. When evaluating an issuer, the Adviser is dependent on information or data obtained through voluntary or third-party reporting that may be incomplete, inaccurate, or unavailable, which could cause the Adviser to incorrectly assess an issuer's business practices.
FidelityClimateActionFund-RetailPRO | Fidelity Climate Action Fund | ClimateFocusRiskMember  
Prospectus Line Items  
Risk [Text Block] Climate Focus Risk. Because the fund focuses its investments in equity securities of climate aware companies, it will be more susceptible to events or factors affecting these companies. The fund is particularly exposed to such developments as changes in global and regional climates, environmental protection regulatory actions, changes in government standards and subsidy levels, changes in taxation and other domestic and international political, regulatory, and economic developments.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Agricultural Productivity 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.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Agricultural Productivity Fund | Risk Lose Money [Member]  
Prospectus Line Items  
Risk [Text Block]   You could lose money by investing in the fund.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Agricultural Productivity 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 .
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Agricultural Productivity Fund | ForeignAndEmergingMarketsRiskMember  
Prospectus Line Items  
Risk [Text Block] Foreign and Emerging Markets Risk. 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. The extent of economic development; political stability; market depth, infrastructure, and capitalization; and regulatory oversight can be less than in more developed markets. Emerging markets typically have less established legal, accounting and financial reporting systems than those in more developed markets, which may reduce the scope or quality of financial information available to investors. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Agricultural Productivity 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.      
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Agricultural Productivity 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. The value of securities of smaller issuers can be more volatile than that of larger issuers.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Agricultural Productivity 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.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Agricultural Productivity Fund | ManagementRiskMember  
Prospectus Line Items  
Risk [Text Block] Management Risk. The Adviser's application of the fund's strategy criteria may not achieve its intended results. The fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies .
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Agricultural Productivity Fund | AgricultureProductivityIndustryConcentrationMember  
Prospectus Line Items  
Risk [Text Block] Agriculture Productivity Industry Concentration. The agriculture productivity theme can be significantly affected by consumer and product trends, competitive pricing, technological changes, and environmental factors, including weather and natural disasters, as well as the performance of the overall economy, interest rates, consumer confidence, and the cost of commodities. Regulations and policies of various domestic and foreign governments may affect agricultural products.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Agricultural Productivity 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.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability 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.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability Fund | Risk Lose Money [Member]  
Prospectus Line Items  
Risk [Text Block]   You could lose money by investing in the fund.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability 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 .
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability Fund | ForeignAndEmergingMarketsRiskMember  
Prospectus Line Items  
Risk [Text Block] Foreign and Emerging Markets Risk. 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. The extent of economic development; political stability; market depth, infrastructure, and capitalization; and regulatory oversight can be less than in more developed markets. Emerging markets typically have less established legal, accounting and financial reporting systems than those in more developed markets, which may reduce the scope or quality of financial information available to investors. Emerging markets can be subject to greater social, economic, regulatory, and political uncertainties and can be extremely volatile. Foreign exchange rates also can be extremely volatile.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability 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.      
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability 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. The value of securities of smaller issuers can be more volatile than that of larger issuers.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability 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.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability Fund | ManagementRiskMember  
Prospectus Line Items  
Risk [Text Block] Management Risk. The Adviser's application of the fund's strategy criteria may not achieve its intended results. The fund could underperform in comparison to other funds with a similar benchmark or similar objectives and investment strategies .
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability Fund | WaterSustainabilityIndustryConcentrationMember  
Prospectus Line Items  
Risk [Text Block] Water Sustainability Industry Concentration. The water sustainability theme can be significantly affected by demographic, irrigation and industrial usage trends, viability of infrastructure projects, conservation practices, pollution, waste, and environmental factors, including weather, droughts, flooding, as well as the performance of the overall economy, interest rates, consumer confidence, and the cost of commodities. Regulations and policies of various domestic and foreign governments may affect water usage, contamination, and reusability.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability 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.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability Fund | SustainabilityRiskMember  
Prospectus Line Items  
Risk [Text Block] Sustainability Risk. Application of Fidelity Management & Research Company LLC's (FMR) (the Adviser) environmental, social and governance (ESG) rating process and/or its sustainable investing exclusion criteria may affect the fund's exposure to certain issuers, sectors, regions, and countries and may affect the fund's performance depending on whether certain investments are in or out of favor. The criteria related to the fund's ESG rating process and/or adherence to its sustainable investing exclusion criteria may result in the fund forgoing opportunities to buy certain securities when it might otherwise be advantageous to do so, or selling securities for ESG reasons when it might be otherwise disadvantageous for it to do so. As a result, the fund's performance may at times be better or worse than the performance of funds that do not use ESG or sustainability criteria. There are significant differences in interpretations of what it means for an issuer to have positive ESG factors. While the Adviser believes its definitions are reasonable, the portfolio decisions it makes may differ with other investors' or advisers' views. When evaluating an issuer, the Adviser is dependent on information or data obtained through voluntary or third-party reporting that may be incomplete, inaccurate, or unavailable, which could cause the Adviser to incorrectly assess an issuer's business practices.
FidelityAgriculturalProductivityWaterSustainabilityFunds-ComboPRO | Fidelity Water Sustainability Fund | GeographicExposureToEuropeMember  
Prospectus Line Items  
Risk [Text Block] Geographic Exposure to Europe. Because the fund invests a meaningful portion of its assets in Europe, the fund's performance is expected to be closely tied to social, political, and economic conditions within Europe and to be more volatile than the performance of more geographically diversified funds.
Document Type 485BPOS