Investment Risks |
Sep. 29, 2026 |
|---|---|
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | DisruptiveThemeRiskMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Disruptive Theme Risk. The fund normally invests in equity securities of companies that the Adviser believes represent a disruptive theme. These companies may not in fact be disruptive or may not be able to capitalize thereon. The risks associated with such companies include, but are not limited to, small or limited markets for such securities, changes in business cycles, world economic growth, technological progress, rapid obsolescence, and government regulation. Securities of companies that represent disruptive themes tend to be more volatile than securities of companies that do not rely heavily on technology. Rapid change to technologies that affect a company's products could have a material adverse effect on such company's results. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | 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 will generally fluctuate with changes in the market value of the fund's holdings. The fund's 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 shares may result in the fund's 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, 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 shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | 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 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 fund shares. In addition, trading may be halted, for example, due to market conditions. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Automation ETF | GeographicExposureToAsiaMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Geographic Exposure to Asia. Because the fund invests a meaningful portion of its assets in Asia, the fund's performance is expected to be closely tied to social, political, and economic conditions within Asia and to be more volatile than the performance of more geographically diversified funds. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | DisruptiveThemeRiskMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Disruptive Theme Risk. The fund normally invests in equity securities of companies that the Adviser believes represent a disruptive theme. These companies may not in fact be disruptive or may not be able to capitalize thereon. The risks associated with such companies include, but are not limited to, small or limited markets for such securities, changes in business cycles, world economic growth, technological progress, rapid obsolescence, and government regulation. Securities of companies that represent disruptive themes tend to be more volatile than securities of companies that do not rely heavily on technology. Rapid change to technologies that affect a company's products could have a material adverse effect on such company's results. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | 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 will generally fluctuate with changes in the market value of the fund's holdings. The fund's 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 shares may result in the fund's 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, 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 shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Communications ETF | 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 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 fund shares. In addition, trading may be halted, for example, due to market conditions. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | DisruptiveThemeRiskMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Disruptive Theme Risk. The fund normally invests in equity securities of companies that the Adviser believes represent a disruptive theme. These companies may not in fact be disruptive or may not be able to capitalize thereon. The risks associated with such companies include, but are not limited to, small or limited markets for such securities, changes in business cycles, world economic growth, technological progress, rapid obsolescence, and government regulation. Securities of companies that represent disruptive themes tend to be more volatile than securities of companies that do not rely heavily on technology. Rapid change to technologies that affect a company's products could have a material adverse effect on such company's results. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | 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 will generally fluctuate with changes in the market value of the fund's holdings. The fund's 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 shares may result in the fund's 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, 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 shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Finance ETF | 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 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 fund shares. In addition, trading may be halted, for example, due to market conditions. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Medicine ETF | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Medicine ETF | 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Medicine ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Medicine ETF | DisruptiveThemeRiskMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Disruptive Theme Risk. The fund normally invests in equity securities of companies that the Adviser believes represent a disruptive theme. These companies may not in fact be disruptive or may not be able to capitalize thereon. The risks associated with such companies include, but are not limited to, small or limited markets for such securities, changes in business cycles, world economic growth, technological progress, rapid obsolescence, and government regulation. Securities of companies that represent disruptive themes tend to be more volatile than securities of companies that do not rely heavily on technology. Rapid change to technologies that affect a company's products could have a material adverse effect on such company's results. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Medicine ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Medicine ETF | 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 will generally fluctuate with changes in the market value of the fund's holdings. The fund's 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 shares may result in the fund's 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, 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 shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Medicine ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Medicine ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Medicine ETF | 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Medicine ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Medicine ETF | 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 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 fund shares. In addition, trading may be halted, for example, due to market conditions. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | DisruptiveThemeRiskMember | |
| Prospectus Line Items | |
| Risk [Text Block] | Disruptive Theme Risk. The fund normally invests in equity securities of companies that the Adviser believes represent a disruptive theme. These companies may not in fact be disruptive or may not be able to capitalize thereon. The risks associated with such companies include, but are not limited to, small or limited markets for such securities, changes in business cycles, world economic growth, technological progress, rapid obsolescence, and government regulation. Securities of companies that represent disruptive themes tend to be more volatile than securities of companies that do not rely heavily on technology. Rapid change to technologies that affect a company's products could have a material adverse effect on such company's results. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | 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 will generally fluctuate with changes in the market value of the fund's holdings. The fund's 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 shares may result in the fund's 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, 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 shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptive Technology ETF | 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 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 fund shares. In addition, trading may be halted, for example, due to market conditions. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | Risk Lose Money [Member] | |
| Prospectus Line Items | |
| Risk [Text Block] | You could lose money by investing in the fund. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | DisruptiveThemeRiskMember | |
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| Risk [Text Block] | Disruptive Theme Risk. The fund normally invests in equity securities of companies that the Adviser believes represent a disruptive theme. These companies may not in fact be disruptive or may not be able to capitalize thereon. The risks associated with such companies include, but are not limited to, small or limited markets for such securities, changes in business cycles, world economic growth, technological progress, rapid obsolescence, and government regulation. Securities of companies that represent disruptive themes tend to be more volatile than securities of companies that do not rely heavily on technology. Rapid change to technologies that affect a company's products could have a material adverse effect on such company's results. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | GrowthInvestingMember | |
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| 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | FluctuationOfNetAssetValueAndSharePriceMember | |
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| Risk [Text Block] | Fluctuation of Net Asset Value and Share Price. The net asset value per share (NAV) of the fund will generally fluctuate with changes in the market value of the fund's holdings. The fund's 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 shares may result in the fund's 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, 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 shares may become less liquid in response to deteriorating liquidity in the markets for the fund's underlying portfolio holdings. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | InvestingInOtherFundsMember | |
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| Risk [Text Block] | Investing in Other Funds. The fund bears all risks of investment strategies employed by the underlying funds, including the risk that the underlying funds will not meet their investment objectives. Because the fund invests in underlying ETFs, the fund also bears trading-related risks associated with investment in ETFs, as set forth below with respect to the fund's shares. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | AssetAllocationRiskMember | |
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| Risk [Text Block] | Asset Allocation Risk. The fund is subject to risks resulting from the Adviser's asset allocation decisions. The selection of underlying funds could cause the fund to lose value or its results to lag relevant benchmarks or other funds with similar objectives. In addition, the fund's active asset allocation strategy may cause the fund to have a risk profile different than that portrayed above from time to time and may increase losses. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | IssuerSpecificChangesMember | |
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| 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | StockMarketVolatilityMember | |
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| 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | ManagementRiskMember | |
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| 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 . |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | ValueInvestingMember | |
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| 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. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | TradingIssuesMember | |
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| 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 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 fund shares. In addition, trading may be halted, for example, due to market conditions. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | GeographicExposureToAsiaMember | |
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| Risk [Text Block] | Geographic Exposure to Asia. Because an underlying fund invests a meaningful portion of its assets in Asia, the underlying fund's performance is expected to be closely tied to social, political, and economic conditions within Asia and to be more volatile than the performance of more geographically diversified funds. |
| FidelityDisruptiveETFs-ComboPRO | Fidelity Disruptors ETF | GeographicExposureMember | |
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| Risk [Text Block] | Geographic Exposure. Social, political, and economic conditions and changes in regulatory, tax, or economic policy in particular countries or regions could significantly affect the market in such country or region. |
| Document Type | 485BPOS |