v3.26.1
Label Element Value
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk/Return [Heading] oef_RiskReturnHeading First Eagle Core Municipal ETF
Objective [Heading] oef_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock

The investment objective of the First Eagle Core Municipal ETF (the “Fund”) is to seek to provide current income exempt from regular federal income taxes.

Objective, Secondary [Text Block] oef_ObjectiveSecondaryTextBlock Capital appreciation is a secondary objective when consistent with the Fund’s primary objective.
Expense Heading [Optional Text] oef_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund (“Shares”). You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and Example below.
Shareholder Fees Caption [Optional Text] oef_ShareholderFeesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination Jun. 30, 2027
Other Expenses, New Fund, Based on Estimates [Text] oef_OtherExpensesNewFundBasedOnEstimates “Other Expenses” are estimated for the current fiscal year.
Expense Example [Heading] oef_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] oef_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 in the Fund for the time periods indicated and then hold or sell all of your Shares at the end of those periods. The Example also assumes that: (1) your investment has a 5% return each year, and (2) the Fund’s operating expenses remain the same (except that the fee waiver is taken into account only for the one-year expense example). Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Portfolio Turnover [Heading] oef_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] oef_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. No portfolio turnover rate is provided for the Fund because the Fund had not commenced operations prior to the date of this Prospectus.
Strategy [Heading] oef_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock

To pursue its investment objective, the Fund normally invests at least 80% of its net assets (plus any borrowings for investment purposes) in municipal bonds that pay interest that is exempt from regular federal income tax. Such municipal bonds may include obligations issued by U.S. states and their subdivisions, authorities, instrumentalities and corporations,

as well as obligations issued by U.S. territories that pay interest that is exempt from regular federal income tax, and may include all types of municipal bonds, including general obligation bonds, revenue bonds, education revenue bonds, industrial revenue bonds, special tax bonds, tax allocation revenue securities, transportation facility revenue bonds and municipal lease obligations. The Fund may invest without limit in municipal securities that generate income taxable to shareholders subject to the federal alternative minimum tax. While the Fund may invest in securities with any duration or time to maturity, under normal market conditions, the Fund will generally maintain an investment portfolio with a modified duration of between 3 and 10 years. Modified duration is a measure of the sensitivity of a bond's price to changes in interest rates, expressed in years.

 

The Fund will seek to invest primarily in investment grade municipal bonds but may invest up to 15% of its net assets in municipal bonds rated BB+/Ba1 and below at the time of purchase by at least one independent rating agency, or, if unrated, judged by the Adviser to be of comparable quality. Such below-investment-grade bonds are commonly referred to as “high yield” or “junk” bonds. The Fund has no minimum rating limitation for such investments. In deciding whether to sell a security, the Adviser considers various factors related to the market and the portfolio, which may include whether: a security has become overvalued; the Adviser detects credit deterioration or modifies its portfolio strategy, such as sector and/or state allocations; or a security exceeds the portfolio’s diversification targets (i.e., the Adviser’s internal targets for exposures across sectors, states and specific issuers in order to limit exposures to events or factors that may affect any individual industry, geographic location or credit).

 

While the municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies, as of the date of this prospectus, the Fund does not expect that it will have significant exposure to any particular geographic area or type of project.

 

The Fund may invest in municipal zero coupon bonds.
Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock

Performance information for the Fund is not included because the Fund had not commenced operations prior to the date of this Prospectus. Performance information will be available in the Prospectus once the Fund has at least one calendar year of performance.

 

The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future and does not guarantee future results. Updated performance information will be available on the Fund’s website at https://www.firsteagle.com/funds/fecm-core-municipal-etf.
Performance One Year or Less [Text] oef_PerformanceOneYearOrLess Performance information for the Fund is not included because the Fund had not commenced operations prior to the date of this Prospectus. Performance information will be available in the Prospectus once the Fund has at least one calendar year of performance.
Performance Availability Website Address [Text] oef_PerformanceAvailabilityWebSiteAddress https://www.firsteagle.com/funds/fecm-core-municipal-etf
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future and does not guarantee future results.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Risk Lose Money [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Loss of money is a risk of investing in the Fund.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Municipal Bond Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Municipal Bond Risk — The Fund will invest at least 80% of its net assets (plus any borrowings for investment purposes) under normal market conditions in municipal bonds that pay interest that is exempt from regular federal income tax. Like other bonds, municipal bonds are subject to credit risk, interest rate risk, liquidity risk, and call risk. However, the obligations of some municipal issuers may not be enforceable through the exercise of traditional creditors’ rights. The reorganization under federal bankruptcy laws of a municipal bond issuer may result in the bonds being cancelled without payment or repaid only in part, or in delays in collecting principal and interest.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Credit and Interest Rate Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Credit and Interest Rate Risk — The value of the Fund’s portfolio may fluctuate in response to the risk that the issuer of a bond or other instrument will not be able to make payments of interest and principal when due. In addition, fluctuations in interest rates can affect the value of debt instruments held by the Fund. A debt instrument’s “duration” is a way of measuring a debt instrument’s sensitivity to a potential change in interest rates. An increase in interest rates tends to reduce the market value of debt instruments, while a decline in interest rates tends to increase their values. Generally, debt instruments with long maturities and low coupons have the longest durations. Longer-duration instruments tend to be more sensitive to interest rate changes than those with shorter durations. Recent market conditions and events, including increases in interest rates, may exacerbate the risk that borrowers will not be able to make payments of interest and principal when due. During periods of decreasing or prolonged low interest rates, financial markets in which the Fund invests could be negatively affected by, for example, increased volatility, reduced value and liquidity of the Fund’s investments, and perceptions of broader economic decline. In addition, there is risk of significant future rate moves and related economic and market impacts. Credit spread risk is the risk that economic and market conditions or any actual or perceived credit deterioration may lead to an increase in the credit spreads (i.e., the difference in yield between two securities of similar maturity but different credit quality) and a decline in price of an issuer’s securities.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | High Yield Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock High Yield Risk — Debt instruments that are below investment grade, commonly known as ‘‘high yield’’ or ‘‘junk’’ bonds, may be subject to greater levels of interest rate, credit (including issuer default) and liquidity risk than investment grade securities and may experience extreme price fluctuations. The securities of such issuers may be considered speculative and the ability of such issuers to pay their debts on schedule may be uncertain.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Market Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Market Risk — The value and liquidity of the Fund’s portfolio holdings may fluctuate in response to events specific to the issuers or markets in which the Fund invests, as well as economic, political, or social events in the United States or abroad. Markets may be volatile, and prices of individual securities and other investments, including those of a particular type, may decline significantly and rapidly in response to adverse issuer, political, regulatory, market, economic or other developments, public perceptions concerning these developments, and adverse investor sentiment or publicity. Recent market conditions and events, including a global public health crisis, wars and armed conflicts and actions taken by governments in response, may exacerbate volatility. Rapid changes in prices or liquidity, which often are not anticipated and can relate to events not connected to particular investments, may limit the ability of the Fund to dispose of its assets at the price or time of its choosing and can result in losses. Changes in prices may be temporary or may last for extended periods.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Call Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Call Risk — The Fund may be subject to the risk that an issuer will exercise its right to pay principal on a debt obligation held by the Fund earlier than expected. This may happen when there is a decline in interest rates. Under these circumstances, the Fund may be unable to recoup all of its initial investment and may also suffer from having to reinvest in lower-yielding securities.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | New Fund Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock New Fund Risk — The Fund may not be successful in implementing its investment strategy, and its investment strategy may not be successful under all future market conditions, either of which could result in the Fund being liquidated at some future time without shareholder approval and/or at a time that may not be favorable for certain shareholders. New funds may not attract sufficient assets to achieve investment, trading or other efficiencies. In addition, the Fund may be subject to a “ramp-up” period, during which it may not be fully invested or able to meet its investment objective or principal investment strategies.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Changes in Debt Ratings Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Changes in Debt Ratings Risk — If a rating agency gives a debt instrument a lower rating, the value of the instrument may decline because investors may demand a higher rate of return.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Secured Overnight Financing Rate ( [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Secured Overnight Financing Rate (“SOFR”) Risk — SOFR is intended to be a broad measure of the cost of borrowing funds overnight in transactions that are collateralized by U.S. Treasury securities. Because SOFR is a financing rate based on overnight secured funding transactions, it differs fundamentally from the London Inter-Bank Offered Rate (“LIBOR”), so there is no assurance that SOFR, or rates derived from SOFR, will perform in the same or similar way as LIBOR would have performed at any time, and there is no assurance that SOFR-based rates will be a suitable substitute for LIBOR.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Income Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Income Risk — The Fund may experience a decline in its income due to falling interest rates, earnings declines, income decline within a security or default of an issuer of a security. During periods of increasing or prolonged high interest rates, among other things, borrowing costs may increase, fewer issuances of securities and decreased liquidity may occur and/or an issuer of a security may be unable to refinance existing debt obligations and/or make income payments. The amount and rate of distributions that the Fund’s shareholders receive are affected by the income that the Fund receives from its portfolio holdings. If the income is reduced, distributions by the Fund to shareholders may be less.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Alternative Minimum Tax Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Alternative Minimum Tax Risk — All or a portion of the Fund’s otherwise tax-exempt income may be taxable to those shareholders subject to the federal alternative minimum tax.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Municipal Issuer Focus Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Municipal Issuer Focus Risk — The municipal issuers in which the Fund invests may be located in the same geographic area or may pay their interest obligations from revenue of similar projects, such as hospitals, airports, utility systems and housing finance agencies. This may make the Fund’s investments more susceptible to similar social, economic, political or regulatory occurrences, making the Fund more susceptible to experience a drop in its share price than if the Fund had invested across issuers that did not have similar characteristics.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | General Obligation and Revenue Bonds [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

General Obligation and Revenue Bonds — General obligation bonds are general obligations of a governmental entity that are secured by the entity’s pledge of its faith, credit and taxing power for the payment of principal and interest. Revenue bonds, on the other hand, are not supported by an issuer’s power to levy taxes and are payable only from the revenues derived from specific projects, authorities or facilities or, in some cases, from the proceeds of a special excise tax or another specific revenue source.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Education Revenue Bonds [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Education Revenue Bonds — Education revenue bonds are payable from and secured by revenues derived from the operation of schools, colleges and universities and their revenues are derived mainly from ad valorem taxes, or for higher education systems, from tuition, dormitory revenues, grants and endowments. Payment on education revenue bonds may be adversely affected by litigation contesting the state constitutionality of financing public

education in part from ad valorem taxes. Risks related to college and university obligations include the prospect of a declining percentage of the population consisting of “college” age individuals, possible inability to raise tuitions and fees sufficiently to cover increased operating costs, the uncertainty of continued receipt of Federal grants and state funding and new government legislation or regulations which may adversely affect the revenues or costs of such issuers.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Industrial Revenue Bonds [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Industrial Revenue Bonds — Industrial revenue bonds are issued by governmental entities to provide financing aid to community facilities such as hospitals, hotels, business or residential complexes, convention halls and sport complexes. The proceeds from the issuance of an industrial revenue bond are directed to a private, for-profit business and the industrial revenue bond is backed by the credit and security of the private, for-profit business. Payment on industrial revenue bonds may be adversely affected by the general state of the economy, intense competition, consolidation, domestic and international politics, excess capacity and consumer spending trends. In addition, they may also be significantly affected by overall capital spending levels, economic cycles, technical obsolescence, delays in modernization, labor relations, government regulations and e-commerce initiatives. Industrial issuers may also be affected by factors more specific to their individual industries.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Special Tax Bonds [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Special Tax Bonds — Special tax bonds are payable from and secured by revenues received by a municipality from a particular tax. Examples of special taxes are a tax on the rental of a hotel room, on the purchase of food and beverages, on the purchase of fuel, on the rental of automobiles or on the consumption of liquor. Special tax bonds are not secured by the general tax revenues of the municipality, and they do not represent general obligations of the municipality. Payment on special tax bonds may be adversely affected by a reduction in revenues realized from the underlying special tax. In addition, if spending on the particular goods or services that are subject to the special tax decrease, the municipality may be under no obligation to increase the rate of the special tax to ensure that sufficient revenues are raised from the shrinking taxable base.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Tax Allocation Revenue Securities [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Tax Allocation Revenue Securities — Tax allocation bonds are typically secured by incremental tax revenues collected on property within the areas where redevelopment projects financed by bond proceeds are located. Tax allocation bond payments are expected to be made from projected increases in tax revenues derived from higher assessed values of property resulting from development in the particular project area and not from an increase in tax rates. Payment on tax allocation bonds may be adversely affected by variations in taxable values of property in a project area, successful appeals by property owners of assessed valuations, substantial delinquencies in the payment of property taxes, or imposition of any constitutional or legislative property tax rate decrease.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Transportation Facility Revenue Bonds [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Transportation Facility Revenue Bonds — Transportation facility revenue bonds are obligations which are payable from and secured by revenues derived from the ownership and operation of facilities such as airports, bridges, turnpikes, port authorities, convention centers and arenas. Payment on bonds related to airports and other facilities is dependent on fees received from signatory airlines use agreements (which consist of annual payments for leases, occupancy of certain terminal space and service fees), user fees from ports, tolls on turnpikes and bridges and rents from buildings. The revenue earned from these fees may be reduced by increased cost of maintenance, decreased use of a facility, lower cost of alternative modes of transportation, scarcity of fuel and reduction or loss of rents.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Municipal Lease Obligation Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Municipal Lease Obligation Risk — In a municipal lease obligation, the issuer agrees to make payments when due on the lease obligation. Although the issuer does not pledge its unlimited taxing power for payment of the lease obligation, the lease obligation is secured by the leased property.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Tax-Exempt Status Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Tax-Exempt Status Risk — The Fund’s investments in municipal securities rely on the opinion of the issuer’s bond counsel and, in the case of derivative securities, sponsors’ counsel, that the interest paid on those securities will not be subject to federal income tax. Tax opinions are generally provided at the time the municipal security is initially issued, and neither the Fund nor the Adviser will independently review the bases for those tax opinions. However, tax opinions are not binding on the Internal Revenue Service (the “IRS”), and if any of those tax opinions are ultimately determined to be incorrect or if events occur after the security is acquired that impact the security’s tax-exempt status, the Fund and its shareholders could be subject to substantial tax liability for the current or past years and shareholders may have to file amended tax returns and pay additional taxes, interest and penalties. In addition, an IRS assertion of taxability may impair the liquidity and the fair market value of the securities.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Tax Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Tax Risk — The Fund may be adversely impacted by changes in tax rates and policies. Because interest income from municipal securities is normally not subject to regular federal income taxation, the attractiveness of municipal securities in relation to other investment alternatives may be affected by changes in federal and state income tax rates or changes  in the tax-exempt status of interest income from municipal securities. Any proposed or actual changes in such rates or exempt status, therefore, can significantly affect the demand for and supply, liquidity and marketability of the municipal securities. This could in turn affect the Fund’s net asset value and ability to acquire and dispose of municipal securities at desirable yield and price levels.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Unrated Bond Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Unrated Bond Risk — The Adviser may internally assign ratings to securities that are not rated by any nationally recognized statistical rating organization, after assessing their credit quality and other factors, in categories similar to those of nationally recognized statistical rating organizations. There can be no assurance, nor is it intended, that the Adviser’s credit analysis process is consistent or comparable with the credit analysis process used by a nationally recognized statistical rating organization. Unrated securities are considered “investment-grade” or “below-investment-grade” if judged by the Adviser to be comparable to rated investment-grade or below-investment-grade securities. Neither a rating assigned by an NRSRO nor the Adviser’s internal rating constitutes a guarantee of credit quality. In addition, some unrated securities may not have an active trading market or may trade less actively than rated securities, which means that unrated securities may be difficult to sell promptly at an acceptable price.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | U.S. Territory Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock U.S. Territory Risk — The Fund may invest in obligations of the governments of U.S. territories, commonwealths and possessions such as Puerto Rico, the U.S. Virgin Islands, Guam and the Northern Mariana Islands to the extent such obligations are exempt from regular federal income taxes. Accordingly, the Fund may be adversely affected by local political, economic, social and environmental conditions and developments, including natural disasters, within these U.S. territories, commonwealths and possessions affecting the issuers of such obligations.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Valuation Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Valuation Risk — The investments in which the Fund invests typically are valued by a pricing service utilizing a range of market-based inputs and assumptions, including readily available market quotations obtained from broker-dealers making markets in such instruments, cash flows and transactions for comparable instruments. There is no assurance that the Fund will be able to sell a portfolio investment at the price established by the pricing service, which could result in a loss to the Fund. Pricing services generally price debt securities assuming orderly transactions of an institutional “round lot” size, but some trades may occur in smaller, “odd lot” sizes, often at lower prices than institutional round lot trades. Different pricing services may incorporate different assumptions and inputs into their valuation methodologies, potentially resulting in different values for the same investments. As a result, if the Fund were to change pricing services, or if the Fund’s pricing service were to change its valuation methodology, there could be a material impact, either positive or negative, on the Fund’s NAV.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Zero Coupon Bond Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Zero Coupon Bond Risk — Zero coupon securities are debt obligations that do not entitle the holder to any periodic payment of interest prior to maturity or a specified date when the securities begin paying current interest. They are issued and traded at a discount from their face amount or par value, which discount varies depending on the time remaining until cash payments begin, prevailing interest rates, liquidity of the security and the perceived credit quality of the issuer. The market prices of zero coupon securities generally are more volatile than the prices of securities that pay interest periodically and in cash and are likely to respond to changes in interest rates to a greater degree than do other types of debt securities having similar maturities and credit quality. Original issue discount earned on zero coupon securities must be included in the Fund’s income. Thus, to continue to qualify for tax treatment as a regulated investment company and to avoid a certain excise tax on undistributed income, the Fund may be required to distribute as a dividend an amount that is greater than the total amount of cash it actually receives. These distributions must be made from the Fund’s cash assets or, if necessary, from the proceeds of sales of portfolio securities. The Fund will not be able to purchase additional income-producing securities with cash used to make such distributions, and its current income ultimately could be reduced as a result.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Large Shareholder Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Large Shareholder Risk — Certain large shareholders, including APs (as defined below), may from time to time own a substantial amount of the Fund’s shares. There is no requirement that these shareholders maintain their investment in the Fund. There is a risk that such large shareholders may redeem all or a substantial portion of their investments in the Fund in a short period of time, which could have a significant negative impact on the Fund’s NAV, liquidity, and brokerage costs. Large redemptions could, to the extent the Fund permits redemptions in cash, accelerate the realization of taxable income and cause the Fund to make taxable distributions to shareholders earlier than the Fund otherwise would have. In addition, under certain circumstances, non-redeeming shareholders may be treated as receiving a disproportionately large taxable distribution during or with respect to such year.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Cybersecurity Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Cybersecurity Risk — Cybersecurity risk is the risk of an unauthorized breach and access to Fund assets, Fund or customer data (including private shareholder information), or proprietary information, or the risk of an incident occurring that causes the Fund, the Adviser, the Fund’s investment sub-adviser, custodian, transfer agent, distributor and other service providers and financial intermediaries to suffer data breaches, data corruption or lose operational functionality or prevent Fund investors from purchasing or redeeming shares or receiving distributions. The Fund and the Adviser have limited ability to prevent or mitigate cyber security incidents affecting third-party service providers and such third-party  service providers may have limited indemnification obligations to the Fund or the Adviser. Successful cyber-attacks or other cyber-failures or events affecting the Fund or its service providers may adversely impact and cause financial losses to the Fund or its shareholders. Issuers of securities in which the Fund invests are also subject to cyber security risks, and the value of these securities could decline if the issuers experience cyber-attacks or other cyber-failures.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Illiquid Investment Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Illiquid Investment Risk — Holding illiquid securities restricts or otherwise limits the ability for the Fund to freely dispose of its investments for specific periods of time. The Fund might not be able to sell illiquid securities at its desired price or time. Changes in the markets or in regulations governing the trading of illiquid instruments can cause rapid changes in the price or ability to sell an illiquid security. The market for lower-quality debt instruments, including junk bonds, is generally less liquid than the market for higher-quality debt instruments. In addition, brokers and dealers have decreased their inventories of municipal bonds in recent years. This could limit the Adviser’s ability to buy or sell municipal bonds and increase price volatility and trading costs, particularly during periods of economic or market stress. In addition, recent federal banking regulations may cause certain dealers to reduce their inventories of municipal bonds, which may further decrease the Adviser’s ability to buy or sell bonds. As a result, the Adviser may be forced to accept a lower price to sell a security, to sell other securities to raise cash, or to give up an investment opportunity, any of which could have a negative effect on performance.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | ETF Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock ETF Risk — The Fund is an ETF, and, as a result of an ETF’s structure, it is exposed to the following risks: “Authorized Participants, Market Makers and Liquidity Providers Concentration Risk,” “Cash Transactions Risk,” “Secondary Market Trading Risk,” and “Shares May Trade at Prices Other Than NAV Risk.”
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Authorized Participants, Market Makers and Liquidity Providers Concentration Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Authorized Participants, Market Makers and Liquidity Providers Concentration Risk — Only an authorized participant may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of financial institutions that are institutional investors and may act as authorized participants (“APs”). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to net asset value (“NAV”) and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services, or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions. These events, among others, may lead to the Shares trading at a premium or discount to NAV. Thus, you may pay more (or less) than the NAV when you buy Shares in the secondary market, and you may receive less (or more) than NAV when you sell those Shares in the secondary market. A diminished market for an ETF’s shares substantially increases the risk that a shareholder may pay considerably more or receive significantly less than the underlying value of the ETF shares bought or sold. In periods of market volatility, APs, market makers and/or liquidity providers may be less willing to transact in Shares. If these firms exit the business or are unable or unwilling to process creation and/or redemption orders, Shares may trade at a premium or discount to NAV and bid-ask spreads may widen.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Cash Transactions Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Cash Transactions Risk — Unlike certain ETFs, the Fund may effect its creations and redemptions partially or wholly for cash rather than on an in-kind basis. As a result, the Fund may have to sell portfolio securities at inopportune times in order to obtain the cash needed to meet redemption orders. The Fund also may incur costs such as brokerage costs or be unable to realize certain tax benefits associated with in-kind transfers of portfolio securities that may be realized by other ETFs. These costs may decrease the Fund’s NAV to the extent that the costs are not offset by a transaction fee payable by an AP. Shareholders may be subject to tax on gains they would not otherwise have been subject to and/or at an earlier date than if the Fund had effected redemptions wholly on an in-kind basis. The use of cash creations and redemptions may also cause the Fund’s shares to trade in the market at wider bid-ask spreads or greater premiums or discounts to the Fund’s NAV.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Secondary Market Trading Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Secondary Market Trading Risk — Although Shares are listed on a national securities exchange, the NYSE Arca, Inc. (the “Exchange”), and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that an active or liquid trading market for them will develop or be maintained. In addition, trading in Shares on the Exchange may be halted. Trading may be halted because of market conditions or for reasons that, in the view of the Exchange, make trading in the Fund inadvisable. These may include: (a) the extent to which trading is not occurring in the securities and/or the financial instruments composing the Fund’s portfolio; or (b) whether other unusual conditions or circumstances detrimental to the maintenance of a fair and orderly market are present. During periods of market stress, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount). This risk is heightened in times of market volatility or periods of steep market declines. Further, APs may be unwilling to participate in the creation/redemption process during periods of market stress, particularly if the market for shares becomes less liquid in response to deteriorating liquidity in the markets for the Fund’s underlying portfolio holdings, which may lead to widening of bid-ask spreads and differences between the market price of the shares and the underlying value of those shares.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | Shares May Trade at Prices Other Than NAV Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Shares May Trade at Prices Other Than NAV Risk — As with all ETFs, Shares may be bought and sold in the secondary market at market prices. There is a risk that market prices for Fund Shares will vary significantly from the Fund’s NAV. Where all or a portion of the Fund’s underlying securities trade in a foreign market that is closed when the market in which the Fund’s Shares are listed is open for trading, there may be changes between the last quote of the underlying securities’ value in the closed foreign market and the value of such underlying securities during the Fund’s domestic trading day.
First Eagle Core Municipal ETF | First Eagle Core Municipal ETF | First Eagle Core Municipal ETF  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.40%
Distribution or Similar (Non 12b-1) Fees oef_DistributionOrSimilarNon12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.00% [1]
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.40%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets (0.15%) [2]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.25%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 26
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 113
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 26
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 $ 113
[1] “Other Expenses” are estimated for the current fiscal year.
[2] First Eagle Investment Management, LLC (the “Adviser”) has contractually agreed to waive and/or reimburse certain fees and expenses so that the total annual fund operating expenses (excluding Acquired Fund Fees and Expenses (“AFFE”), brokerage commissions, extraordinary items, interest or taxes) (“annual operating expenses”) is limited to 0.25% of the Fund’s average daily net assets. These contractual limitations are in effect until June 30, 2027, and may not be terminated prior to that date without the approval of the Board of Trustees (the “Board”) of First Eagle ETF Trust (the “Trust”).