Label	Element	Value
Risk Return Abstract	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	FEDERATED HERMES ETF TRUST
Prospectus Date	rr_ProspectusDate	Jun. 30, 2022
Federated Hermes Short Duration Corporate ETF
Risk Return Abstract	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	<span style="color:#000000;font-family:Times New Roman;font-size:14pt;">Fund Summary Information</span><span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">Federated Hermes Short Duration Corporate ETF (the “Fund”)</span>
Objective [Heading]	rr_ObjectiveHeading	<span style="color:#000000;font-family:Arial;font-size:8pt;font-weight:bold;text-transform:uppercase;">RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE</span>
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The Fund’s investment objective is to seek current income.
Expense [Heading]	rr_ExpenseHeading	<span style="color:#000000;font-family:Arial;font-size:8pt;font-weight:bold;text-transform:uppercase;">RISK/RETURN SUMMARY: FEES AND EXPENSES</span>
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	This table describes the fees and expenses that you may pay if you buy, hold and sell the Fund’s Shares (Shares). You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	<span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</span>
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	<span style="font-family:Arial Narrow;font-size:8pt;">July 1, 2023</span>
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	<span style="font-family:Arial;font-size:8.5pt;font-weight:bold;">Portfolio Turnover</span>
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund Shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the period from December 16, 2021 (commencement of operations) toApril 30, 2022, the Fund’s portfolio turnover rate was3% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	3.00%
Expense Example [Heading]	rr_ExpenseExampleHeading	<span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">Example</span>
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other funds.The Example assumes that you invest $10,000 for the time periods indicated and then redeem or hold all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses (excluding any fee waivers and/or expense reimbursements) are as shown in the table above and remain the same. The expenses used to calculate the Fund’s examples do not include fee waivers or expense reimbursements. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading]	rr_StrategyHeading	<span style="color:#000000;font-family:Arial;font-size:8pt;font-weight:bold;text-transform:uppercase;">RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE </span><span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">What are the Fund’s Main Investment Strategies?</span>
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund primarily invests in a diversified portfolio of investment-grade, fixed-income securities consisting primarily of corporate debt securities. Corporate debt securities, including notes, bonds, debentures and commercial paper, are fixed income securities usually issued by businesses to finance their operations. The Fund’s investment adviser (the “Adviser”) seeks to enhance the Fund’s performance by allocating relatively more of its portfolio to the security type that the Adviser expects to offer the best balance between current income and risk. Some of the corporate debt securities in which the Fund invests are considered to be “foreign securities,” which are securities of issuers based outside of the United States. The foreign securities in which the Fund invests will be predominately denominated in U.S. dollars. The Fund may invest up to 10% of its assets in fixed-income securities rated below investment-grade. Noninvestment-grade securities may also be referred to as below investment-grade securities (“junk bonds” or high yield securities”). To pursue the Fund’s investment strategy, the Adviser can invest in instruments directly or through investing in other investment companies, including, for example, affiliated funds advised by the Adviser or its affiliates.The Fund may also invest in U.S. Treasury securities, U.S. government agency securities, (including mortgage-backed securities issued or guaranteed by U.S. government agencies or instrumentalities), mortgage-backed securities (MBS), asset-backed securities and commercial mortgage-backed securities (CMBS).The Fund may invest in derivative contracts, in particular, futures contracts, option contracts and swap contracts, to implement its investment strategies. For example, the Fund may use derivative contracts to increase or decrease the portfolio’s exposure to the investment(s) underlying the derivative in an attempt to benefit from changes in the value of the underlying investment(s). There can be no assurance that the Fund’s use of derivative contracts will work as intended. Derivative investments made by the Fund are included within the Fund’s 80% policy (as described below) and are calculated at market value. Consistent with the Bloomberg 1-5 Year Corporate Index, the Fund’s benchmark, the Fund may, from time to time, have larger allocations to certain broad market sectors in attempting to achieve its investment objective.The Adviser may lengthen or shorten duration from time to time based on its interest rate outlook, but, under normal market conditions, the Fund’s dollar-weighted average effective duration is expected to be within a range of 1.5 to 3.5 years. Duration measures the price sensitivity of a fixed-income security to changes in interest rates.The Fund will invest its assets so that at least 80% of its net assets (plus any borrowings for investment purposes) are invested in corporate fixed-income investments. The Fund will notify shareholders at least 60 days in advance of any change in its investment policy that would enable the Fund to invest, under normal circumstances, less than 80% of its net assets in corporate fixed-income investments.
Risk [Heading]	rr_RiskHeading	<span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">What are the Main Risks of Investing in the Fund?</span>
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	All funds take investment risks. Therefore, it is possible to lose money by investing in the Fund. The primary factors that may reduce the Fund’s returns include:◾ Interest Rate Risk. Prices of fixed-income securities generally fall when interest rates rise. The longer the duration of a fixed-income security, the more susceptible it is to interest rate risk. Recent and potential future changes in monetary policy made by central banks and/or their governments are likely to affect the level of interest rates.◾ Issuer Credit Risk. It is possible that interest or principal on securities will not be paid when due. Such non-payment or default may reduce the value of the Fund’s portfolio holdings, its share price and its performance.◾ Counterparty Credit Risk. Credit risk includes the possibility that a party to a transaction involving the Fund will fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategy.◾ Liquidity Risk. The fixed-income securities in which the Fund invests may be less readily marketable and may be subject to greater fluctuation in price than other securities. Liquidity risk also refers to the possibility that the Fund may not be able to sell a security or close out a derivative contract when it wants to. If this happens, the Fund could incur losses.◾ Risk of Foreign Investing. Because the Fund invests in securities issued by foreign companies and national governments, the Fund’s Share price may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.◾ Call Risk. The Fund’s performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below its current market value.◾ Risk Associated with Noninvestment-Grade Securities. Securities rated below investment grade may be subject to greater interest rate, credit and liquidity risks than investment-grade securities. These securities are considered speculative with respect to the issuer’s ability to pay interest and repay principal.◾ New Fund Risk. A new fund’s performance may not represent how the fund is expected to or may perform in the long term. In addition, new funds have limited operating histories for investors to evaluate and new funds may not attract sufficient assets to achieve investment and trading efficiencies. If a new fund were to fail to successfully implement its investment strategies or achieve its investment objective, performance may be negatively impacted, and any resulting liquidation could create negative transaction costs for the fund and tax consequences for investors.◾ Underlying Fund Risk. The risk that the Fund’s performance is closely related to the risks associated with the securities and other investments held by underlying funds and that the ability of a Fund to achieve its investment objective will depend upon the ability of underlying funds to achieve their respective investment objectives. The Fund bears Underlying Fund fees and expenses indirectly.◾ ETF Risk. As an ETF, the Fund is subject to the following risks:Authorized Participants Concentration Risk. To the extent that the Fund invests in instruments that trade outside of a collateralized settlement system, it may have a limited number of financial institutions that act as Authorized Participants. To the extent they cannot or are otherwise unwilling, to engage in creation and redemption transactions with the Fund and no other Authorized Participant steps in, trading in Shares of the Fund may be significantly diminished and the market price of Shares may represent at a significant discount to net asset value (NAV). Shares may also face delisting from the Exchange.Premium/Discount Risk. There may be times when the market price of the Fund’s Shares is more than the NAV intra-day (i.e., the market price represents a premium to NAV) or less than the NAV intra-day (i.e., the market price represents a discount to NAV). As a result, shareholders of the Fund may pay more than NAV when purchasing Shares and receive less than NAV when selling Fund Shares. This risk is heightened in times of market volatility and in steep market declines. In addition, a Fund’s end-of-day market price may deviate from its NAV to the extent that the Fund invests in foreign securities whose local trading markets close before the U.S. market closes because, although the Fund may value such securities at their local market closing prices for purposes of calculating NAV, the broader market may assign them a different value, including due to after-hours developments in their local markets, which may be reflected in the market price of Shares.Secondary Market Trading Risk. Investors buying or selling Shares in the secondary market will normally pay brokerage commissions, which are often a fixed amount and may be a significant proportional cost for investors buying or selling relatively small amounts of Shares. Secondary market trading is subject to bid-ask spreads and trading in Fund Shares may be halted by the Exchange because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell Shares of the Fund. In addition, although the Fund’s Shares are listed on the Exchange, there can be no assurance that an active trading market for Shares will develop or be maintained or that the Fund’s Shares will continue to be listed.Cash Transactions Risk. Like other ETFs, the Fund sells and redeems its Shares only in large blocks called Creation Units and only to Authorized Participants. Unlike most other ETFs, however, the Fund expects to effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities. As a result, an investment in the Fund may incur certain costs, including brokerage costs in connection with investing cash received and may recognize capital gains in connection with cash redemptions, unlike an ETF that effects creations and redemptions only in-kind. In addition, costs could be imposed on the Fund which would have the effect of decreasing the Fund’s net asset value to the extent the costs are not offset by a transaction fee payable by an Authorized Participant.◾ Leverage Risk. Leverage risk is created when an investment exposes the Fund to a level of risk that exceeds the amount invested. Changes in the value of such an investment magnify the Fund’s risk of loss and potential for gain.◾ Risk of Investing in Derivative Contracts. Derivative contracts involve risks different from, or possibly greater than, risks associated with investing directly in securities and other traditional investments. Specific risk issues related to the use of such contracts include valuation and tax issues, increased potential for losses and/or costs to the Fund, and a potential reduction in gains to the Fund. Each of these issues is described in greater detail in this Prospectus. Derivative contracts may also involve other risks described in this Prospectus, such as interest rate, credit, liquidity and leverage risks.◾ Risk Related to the Economy. The value of the Fund’s portfolio may decline in tandem with a drop in the overall value of the markets in which the Fund invests and/or other markets. Economic, political and financial conditions, industry or economic trends and developments or public health risks, such as epidemics or pandemics, may, from time to time, and for varying periods of time, cause the Fund to experience volatility, illiquidity, shareholder redemptions, or other potentially adverse effects.◾ Mortgage-Backed Securities (MBS) Risk. A rise in interest rates may cause the value of MBS held by the Fund to decline. Certain MBS issued by GSEs are not backed by the full faith and credit of the U.S. government. A non-agency MBS is subject to the risk that the value of such security will decline, because the security is not issued or guaranteed as to principal or interest by the U.S. government or a GSE. The Fund’s investments in collateralized mortgage obligations (CMOs) may entail greater market, prepayment and liquidity risks than other MBS. The non-agency MBS and CMOs in which the Fund invests may be less readily marketable and may be subject to greater fluctuation in price than other securities.◾ Prepayment and Extension Risk. When homeowners prepay their mortgages in response to lower interest rates, the Fund will be required to reinvest the proceeds at the lower interest rates available. Also, when interest rates fall, the price of mortgage-backed securities may not rise to as great an extent as that of other fixed-income securities. When interest rates rise, homeowners are less likely to prepay their mortgages. A decreased rate of prepayments lengthens the expected maturity of a mortgage-backed security, and the price of mortgage-backed securities may decrease more than the price of other fixed-income securities.◾ Sector Risk. Because the Fund may allocate relatively more assets to certain industry sectors than others, the Fund’s performance may be more susceptible to any developments which affect those sectors emphasized by the Fund.◾ Technology Risk. The Adviser uses various technologies in managing the Fund, consistent with its investment objective(s) and strategy described in this Prospectus. For example, proprietary and third-party data and systems are utilized to support decision making for the Fund. Data imprecision, software or other technology malfunctions, programming inaccuracies and similar circumstances may impair the performance of these systems, which may negatively affect Fund performance.The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.
Risk Lose Money [Text]	rr_RiskLoseMoney	<span style="color:#000000;font-family:Times New Roman;font-size:10pt;margin-left:10pt;">All funds take investment risks. Therefore, it is possible to lose money by investing in the Fund. The primary factors </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;">that may reduce the Fund’s returns include:</span>
Risk Not Insured [Text]	rr_RiskNotInsured	<span style="color:#000000;font-family:Times New Roman;font-size:10pt;margin-left:10pt;">The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;">by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.</span>
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	<span style="color:#000000;font-family:Arial;font-size:8pt;font-weight:bold;text-transform:uppercase;">Performance: Bar Chart and Table </span>
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	A performance bar chart and total return information for the Fund will be provided after the Fund has been in operation for a full calendar year. Updated performance information for the Fund is available under the “Products” section at FederatedInvestors.com or by calling 1-800-341-7400.
Performance One Year or Less [Text]	rr_PerformanceOneYearOrLess	<span style="color:#000000;font-family:Times New Roman;font-size:10pt;margin-left:10pt;">A performance bar chart and total return information for the Fund will be provided after the Fund has been in operation </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;">for a full calendar year.</span>
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	<span style="color:#000000;font-family:Times New Roman;font-size:10pt;">1-800-341-7400</span>
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	<span style="color:#0000FF;font-family:Times New Roman;font-size:10pt;">FederatedInvestors.com</span>
Fee Waiver Or Reimbursement Over Assets, Later Of Termination Or Next Effective Prospectus	federate_FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus	<span style="font-family:Arial Narrow;font-size:8pt;">up to but not including the later of </span><span style="font-family:Arial Narrow;font-size:8pt;">(the “Termination Date”): (a) </span><span style="font-family:Arial Narrow;font-size:8pt;">July 1, 2023</span><span style="font-family:Arial Narrow;font-size:8pt;">; or (b) the date of the Fund’s next effective Prospectus.</span>
Federated Hermes Short Duration Corporate ETF | Federated Hermes Short Duration Corporate ETF
Risk Return Abstract	rr_RiskReturnAbstract
Management Fee	rr_ManagementFeesOverAssets	0.39%
Distribution (12b-1) Fee	rr_DistributionAndService12b1FeesOverAssets	none	[1]
Other Expenses	rr_OtherExpensesOverAssets	0.03%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.42%
Fee Waivers and/or Expense Reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.12%)	[2]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements	rr_NetExpensesOverAssets	0.30%
1 Year	rr_ExpenseExampleYear01	$ 43
3 Years	rr_ExpenseExampleYear03	135
5 Years	rr_ExpenseExampleYear05	235
10 Years	rr_ExpenseExampleYear10	$ 530

[1] The Fund has adopted a Distribution (12b-1) Plan pursuant to which the Fund may incur and pay a Distribution (12b-1) Fee of up to a maximum of 0.25%. No such fee is currently incurred and paid by the Fund. The Fund will not incur and pay such a Distribution (12b-1) Fee until such time as approved by the Fund’s Board of Trustees (“Trustees”).

[2] The Adviser and certain of its affiliates have agreed to waive certain amounts of their respective fees and/or reimburse expenses. Total annual fund operating expenses (excluding acquired fund fees and expenses, interest expense, taxes, litigation expenses, extraordinary expenses and proxy-related expenses paid by the Fund, if any) paid by the Fund (after the waivers and/or reimbursements) will not exceed 0.29% (the “Fee Limit”) up to but not including the later of (the “Termination Date”): (a) July 1, 2023; or (b) the date of the Fund’s next effective Prospectus. These arrangements may only be terminated or the Fee Limit increased prior to the Termination Date with the agreement of the Trustees.