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| First Eagle Global Fund | First Eagle Global Fund | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk/Return [Heading] | oef_RiskReturnHeading | First Eagle Global Fund | |||||||||||||||||||||||||||||||||||||||||
| Objective [Heading] | oef_ObjectiveHeading | Investment Objective | |||||||||||||||||||||||||||||||||||||||||
| Objective, Primary [Text Block] | oef_ObjectivePrimaryTextBlock | First Eagle Global Fund (“Global Fund” or the “Fund”) seeks long-term growth of capital by investing in a range of asset classes from markets in the United States and throughout the world. |
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| Expense Heading [Optional Text] | oef_ExpenseHeading | Fees and Expenses of the Global Fund | |||||||||||||||||||||||||||||||||||||||||
| Expense Narrative [Text Block] | oef_ExpenseNarrativeTextBlock | The following information describes the fees and expenses you may pay if you buy, hold and sell shares of the Global Fund. 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. You may qualify for sales charge discounts if you, together with certain related accounts, invest, or agree to invest in the future, at least $25,000 in the Global Fund. Information about these and other discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class A Shares sections on pages 210 and 217, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms. |
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| Shareholder Fees Caption [Optional Text] | oef_ShareholderFeesCaption | Shareholder Fees (fees paid directly from your investment) | |||||||||||||||||||||||||||||||||||||||||
| Operating Expenses Caption [Optional Text] | oef_OperatingExpensesCaption | Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment) | |||||||||||||||||||||||||||||||||||||||||
| Expenses Deferred Charges [Text Block] | oef_ExpensesDeferredChargesTextBlock | A contingent deferred sales charge of 1.00% may apply on certain redemptions of Class A shares made within 18 months following a purchase of $1,000,000 or more without an initial sales charge. | |||||||||||||||||||||||||||||||||||||||||
| Expense Breakpoint Discounts [Text] | oef_ExpenseBreakpointDiscounts | You may qualify for sales charge discounts if you, together with certain related accounts, invest, or agree to invest in the future, at least $25,000 in the Global Fund. | |||||||||||||||||||||||||||||||||||||||||
| Expense Breakpoint, Minimum Investment Required [Amount] | oef_ExpenseBreakpointMinimumInvestmentRequiredAmount | $ 25,000 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example [Heading] | oef_ExpenseExampleHeading | Example | |||||||||||||||||||||||||||||||||||||||||
| Expense Example Narrative [Text Block] | oef_ExpenseExampleNarrativeTextBlock | The following example is intended to help you compare the cost of investing in the Global Fund with the cost of investing in other mutual funds. This hypothetical example assumes you invest $10,000 in the Fund for the time periods indicated and then either redeem or do not redeem all shares at the end of those periods. The example also assumes the average annual return is 5% and operating expenses remain the same. Please keep in mind your actual costs may be higher or lower. |
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| Portfolio Turnover [Heading] | oef_PortfolioTurnoverHeading | Portfolio Turnover Rate | |||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Text Block] | oef_PortfolioTurnoverTextBlock | The Global 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 the Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example above, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 15.99% of the average value of its portfolio. |
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| Portfolio Turnover, Rate | oef_PortfolioTurnoverRate | 15.99% | |||||||||||||||||||||||||||||||||||||||||
| Strategy [Heading] | oef_StrategyHeading | Principal Investment Strategies | |||||||||||||||||||||||||||||||||||||||||
| Strategy Narrative [Text Block] | oef_StrategyNarrativeTextBlock | To achieve its objective of long-term capital growth, the Global Fund will normally invest primarily in common stocks (and securities convertible into common stocks) of U.S. and foreign companies. Investment decisions for the Fund are made without regard to the capitalization (size) of the companies in which it invests. The Fund may invest in any size company, including large, medium and smaller companies. The Fund may also invest in debt instruments (e.g., notes and bonds) without regard to credit rating or time to maturity, short-term debt instruments, gold and other precious metals, and futures contracts related to precious metals. Under normal circumstances, the Fund anticipates it will allocate a substantial amount of its assets to foreign investments (including American Depositary Receipts, Global Depositary Receipts and European Depositary Receipts). That generally means that approximately 40% or more of the Fund’s net assets (plus any borrowings for investment purposes) will be allocated to foreign investments (unless market conditions are not deemed favorable by the Fund, in which case the Fund expects to invest at least 30% of its net assets (plus any borrowings for investment purposes) in foreign investments). For purposes of these 40% and 30% of assets allocations, the Fund “counts” relevant derivative positions on foreign investments, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price, but anticipates valuing each such position for purposes of assessing compliance with this test at notional value). The investment philosophy and strategy of the Global Fund can be broadly characterized as a “value” approach, as it generally seeks a “margin of safety” in its investment purchases with the goal being to avoid permanent impairment of capital (as opposed to temporary losses in share value relating to shifting investor sentiment or other normal share price volatility). In particular, a discount to “intrinsic value” is sought even for the best of businesses, with a deeper discount demanded for companies that we view as under business model, balance sheet, management or other stresses. “Intrinsic value” is based on our judgment of what a prudent and rational business buyer would pay in cash for all of the company in normal markets. See also Defensive Investment Strategies. The Fund makes some investments through a special purpose trading subsidiary (the “Subsidiary”) and may invest up to 25% of its total assets in the Subsidiary. The Subsidiary is a wholly-owned and controlled subsidiary of the Fund, organized under the laws of the Cayman Islands as an exempted company. Generally, the Subsidiary will invest in commodities and related instruments (primarily gold bullion and other precious metals and related futures contracts). For more information about the Global Fund’s principal investment strategies, please see the More Information about the Funds’ Investments section. |
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| Bar Chart and Performance Table [Heading] | oef_BarChartAndPerformanceTableHeading | Investment Results | |||||||||||||||||||||||||||||||||||||||||
| Performance Narrative [Text Block] | oef_PerformanceNarrativeTextBlock | The following information provides an indication of the risks of investing in the Global Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for the periods shown compare with those of one or more broad measures of market performance, which have characteristics relevant to the Fund’s investment strategy. The index is described in the Fund Indices section. As with all mutual funds, past performance is not an indication of future performance (before or after taxes). After-tax returns are calculated using the highest individual U.S. federal income tax rate for each year, and do not reflect the effect of state and local taxes. Actual after-tax returns depend on your individual tax situation. After-tax returns are not relevant to investors in tax-deferred accounts, such as 401(k) plans or individual retirement accounts. Updated performance information is available at https://www.firsteagle.com/funds/global-fund or by calling 800.334.2143. As with all mutual funds, past performance is not an indication of future performance (before or after taxes). The following bar chart assumes reinvestment of dividends and distributions and does not reflect any sales charges. If sales charges were included the returns would be lower. |
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| Performance Information Illustrates Variability of Returns [Text] | oef_PerformanceInformationIllustratesVariabilityOfReturns | The following information provides an indication of the risks of investing in the Global Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for the periods shown compare with those of one or more broad measures of market performance, which have characteristics relevant to the Fund’s investment strategy. | |||||||||||||||||||||||||||||||||||||||||
| Performance Availability Phone [Text] | oef_PerformanceAvailabilityPhone | 800.334.2143 | |||||||||||||||||||||||||||||||||||||||||
| Performance Availability Website Address [Text] | oef_PerformanceAvailabilityWebSiteAddress | www.firsteagle.com/funds/global-fund | |||||||||||||||||||||||||||||||||||||||||
| Performance Past Does Not Indicate Future [Text] | oef_PerformancePastDoesNotIndicateFuture | As with all mutual funds, past performance is not an indication of future performance (before or after taxes). | |||||||||||||||||||||||||||||||||||||||||
| Bar Chart [Heading] | oef_BarChartHeading | Calendar Year Total Returns—Class A | |||||||||||||||||||||||||||||||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | oef_BarChartDoesNotReflectSalesLoads | The following bar chart assumes reinvestment of dividends and distributions and does not reflect any sales charges. If sales charges were included the returns would be lower. | |||||||||||||||||||||||||||||||||||||||||
| Bar Chart Closing [Text Block] | oef_BarChartClosingTextBlock |
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| Highest Quarterly Return, Label [Optional Text] | oef_HighestQuarterlyReturnLabel | Best Quarter | |||||||||||||||||||||||||||||||||||||||||
| Highest Quarterly Return, Date | oef_BarChartHighestQuarterlyReturnDate | Jun. 30, 2020 | |||||||||||||||||||||||||||||||||||||||||
| Highest Quarterly Return | oef_BarChartHighestQuarterlyReturn | 14.73% | |||||||||||||||||||||||||||||||||||||||||
| Lowest Quarterly Return, Label [Optional Text] | oef_LowestQuarterlyReturnLabel | Worst Quarter | |||||||||||||||||||||||||||||||||||||||||
| Lowest Quarterly Return, Date | oef_BarChartLowestQuarterlyReturnDate | Mar. 31, 2020 | |||||||||||||||||||||||||||||||||||||||||
| Lowest Quarterly Return | oef_BarChartLowestQuarterlyReturn | (19.50%) | |||||||||||||||||||||||||||||||||||||||||
| Index No Deduction for Fees, Expenses, or Taxes [Text] | oef_IndexNoDeductionForFeesExpensesTaxes | (reflects no deduction for fees or expenses, but reflects net of withholding taxes) | |||||||||||||||||||||||||||||||||||||||||
| Performance Table Uses Highest Federal Rate | oef_PerformanceTableUsesHighestFederalRate | After-tax returns are calculated using the highest individual U.S. federal income tax rate for each year, and do not reflect the effect of state and local taxes. | |||||||||||||||||||||||||||||||||||||||||
| Performance Table Not Relevant to Tax Deferred | oef_PerformanceTableNotRelevantToTaxDeferred | Actual after-tax returns depend on your individual tax situation. After-tax returns are not relevant to investors in tax-deferred accounts, such as 401(k) plans or individual retirement accounts. | |||||||||||||||||||||||||||||||||||||||||
| Performance Table One Class of after Tax Shown [Text] | oef_PerformanceTableOneClassOfAfterTaxShown | The following table discloses after-tax returns only for Class A shares. After-tax returns for Class C, Class I and Class R6 shares will vary. | |||||||||||||||||||||||||||||||||||||||||
| Performance Table Narrative | oef_PerformanceTableNarrativeTextBlock | The following table discloses after-tax returns only for Class A shares. After-tax returns for Class C, Class I and Class R6 shares will vary. While only partial information is shown for Class R6 shares (because it is more recently organized), annual returns for Class R6 shares would have been substantially similar to those shown here. Class R6 shares are invested in the same portfolio of securities and the annual returns differ only to the extent that Class R6 shares do not have the same expenses as the classes for which more extended performance is shown. Comparative expense information is in the Fees and Expenses table. |
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| Average Annual Return, Caption [Optional Text] | oef_AverageAnnualReturnCaption | Average Annual Total Returns as of December 31, 2025 | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | First Eagle Global Fund | Risk Not Insured [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. |
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| First Eagle Global Fund | First Eagle Global Fund | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | As with any mutual fund investment, you may lose money by investing in the Global Fund. | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | First Eagle Global Fund | 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. |
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| First Eagle Global Fund | First Eagle Global Fund | Equity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Equity Risk — The value of the Fund’s portfolio holdings may fluctuate in response to the risk that the prices of equity securities, including common stock, rise and fall daily. These price movements may result from factors affecting individual companies, industries or the securities market as a whole. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time. Equity securities generally have greater price volatility than debt securities. |
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| First Eagle Global Fund | First Eagle Global Fund | Convertible Security Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Convertible Security Risk — Convertible securities generally offer lower interest or dividend yields than non-convertible securities of similar quality. Convertible securities may gain or lose value due to changes in the issuer’s operating results, financial condition, credit rating and changes in interest rates and other general economic, industry and market conditions. |
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| First Eagle Global Fund | First Eagle Global Fund | Foreign Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Foreign Investment Risk — The Fund may invest in foreign investments (including American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”) and European Depositary Receipts (“EDRs”)). Foreign investments, which can be denominated in any applicable foreign currency, are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations. While depositary receipts provide an alternative to directly purchasing the underlying foreign securities in their respective national markets and currencies, investments in ADRs, GDRs and EDRs continue to be subject to many of the risks associated with investing directly in foreign investments. Additionally, dividends and interest received by the Fund and capital gains recognized by the Fund may give rise to withholding and other taxes imposed by foreign countries and may decrease the Fund’s return. |
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| First Eagle Global Fund | First Eagle Global Fund | Geographic Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Geographic Investment Risk — To the extent the Fund invests a significant portion of its assets in the securities of companies of a single country or region, it is more likely to be impacted by events or conditions affecting that country or region. While the Fund reserves the right to dynamically allocate its assets across countries and regions, listed below are some of the geographies to which the Fund has significant exposure as of the date of this Prospectus. |
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| First Eagle Global Fund | First Eagle Global Fund | Canada Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Canada Risk — The Canadian economy is susceptible to adverse changes in certain commodities markets, including those related to the mining and agricultural industries. It is also heavily dependent on trading with key partners. Any reduction in this trading may adversely affect the Canadian economy. Recent political developments in the United States have raised potential implications for the current trade arrangements between the United States and Canada, which could negatively affect the value of Canadian securities. |
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| First Eagle Global Fund | First Eagle Global Fund | European Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | European Risk — The Fund’s investments may subject it to risks associated with investing in European markets, including economic, political, regulatory and market developments affecting European countries and the European Union. Investments in a single region, even though representing a number of different countries within the region, may be affected by common economic forces and other factors. Political or economic disruptions in European countries, including in countries in which the Fund is not invested, may adversely affect security values and thus the Fund’s holdings. Ongoing geopolitical events, changes in trade relationships, shifts in regulatory frameworks, and regional conflicts may contribute to market volatility, reduced liquidity, and slower economic growth for companies that rely significantly on Europe for their business activities and revenues. Uncertainty regarding economic policy, fiscal conditions, or international trade arrangements involving European countries could also negatively affect the value of European securities. |
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| First Eagle Global Fund | First Eagle Global Fund | Japan Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Japan Risk — The Japanese economy is heavily dependent upon international trade and may be subject to considerable degrees of economic, political and social instability, which could negatively affect the Fund. Japan has also experienced natural disasters, such as earthquakes and tidal waves, of varying degrees of severity, which also could negatively affect the Fund. Recent political developments in the United States have raised potential implications for the current trade arrangements between the United States and Japan, which could negatively affect the value of Japanese securities. |
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| First Eagle Global Fund | First Eagle Global Fund | Small and Medium-Size Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Small and Medium-Size Company Risk — The Fund may invest in small and medium-size companies, the securities of which can be more volatile in price than those of larger companies. Positions in smaller companies, especially when the Fund is a large holder of a small company’s securities, also may be more difficult or expensive to trade. The Fund considers small companies to be companies with market capitalizations of less than $1 billion and medium-size companies to have market capitalizations of less than $10 billion. |
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| First Eagle Global Fund | First Eagle Global Fund | Large-Size Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Large-Size Company Risk — The Fund may invest in larger, more established companies, the securities of which may be unable to respond quickly to new competitive challenges like changes in consumer tastes or innovative smaller competitors. Larger companies are sometimes unable to attain the high growth rates of successful, smaller companies, especially during extended periods of economic expansion. The Fund considers large companies to be companies with market capitalizations of $10 billion or greater. |
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| First Eagle Global Fund | First Eagle Global Fund | Gold Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Gold Risk — The Fund may invest in both physical gold and the securities of companies in the gold mining sector. Prices of gold-related issues are susceptible to changes in U.S. and foreign regulatory policies, taxes, currencies, mining laws, inflation, and various other market conditions. Gold-related investments as a group have not performed as well as the stock market in general during periods when the U.S. dollar is strong, inflation is low and general economic conditions are stable. In addition, returns on gold-related investments have traditionally been more volatile than investments in broader equity or debt markets. |
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| First Eagle Global Fund | First Eagle Global Fund | 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. The Fund may invest in debt instruments that are below investment grade, commonly known as “high yield” or “junk” bonds, which are considered speculative, and carry a higher risk of default. 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. |
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| First Eagle Global Fund | First Eagle Global Fund | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Derivatives Risk — Futures contracts or other “derivatives,” including hedging strategies, present risks related to their significant price volatility and risk of default by the counterparty to the contract. To date, derivatives have been used mainly under a hedging program intended to reduce the impact of foreign exchange rate changes on the Fund’s value. A futures contract is considered a derivative because it derives its value from the price of the underlying security or financial index. The prices of futures contracts can be volatile and futures contracts may lack liquidity. In addition, there may be imperfect or even negative correlation between the price of a futures contract and the price of the underlying securities or financial index. Use of derivatives or similar instruments may not be as favorable as a direct investment in an underlying investment and may adversely affect the amount, timing and character of income distributed to shareholders. As a result, a larger portion of the Fund’s distributions may be treated as ordinary income rather than capital gains. In addition, certain derivatives are subject to mark-to-market or straddle provisions of the Internal Revenue Code of 1986, as amended. If such provisions are applicable, there could be an increase in the amount of taxable dividends paid by the Fund. |
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| First Eagle Global Fund | First Eagle Global Fund | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Currency Risk — Currency risk is the risk that foreign currencies will decline in value relative to that of the U.S. dollar and affect the Fund’s non-U.S. currencies or securities that trade in and receive revenue in non-U.S. currencies. |
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| First Eagle Global Fund | First Eagle Global Fund | Value Investment Strategy Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Value Investment Strategy Risk — An investment made at a perceived “margin of safety” or “discount to intrinsic or fundamental value” can trade at prices substantially lower than when an investment is made, so that any perceived “margin of safety” or “discount to value” is no guarantee against loss. “Value” investments, as a category, or entire industries or sectors associated with such investments, may lose favor with investors as compared to those that are more “growth” oriented. In such an event, the Fund’s investment returns would be expected to lag relative to returns associated with more growth-oriented investment strategies. Investing in or having exposure to “value” securities presents the risk that such securities may never reach what the Adviser believes are their full market values. |
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| First Eagle Global Fund | First Eagle Global Fund | Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Cybersecurity Risk — The occurrence of a disaster such as a cyber-attack, a natural catastrophe, an industrial accident, a terrorist attack or war, events unanticipated in the disaster recovery systems of the Fund and Adviser, or a support failure from external providers, could have an adverse effect on the Fund’s ability to conduct business and on its results of operations and financial condition, particularly if those events affect the Fund and/or the Adviser’s computer-based data processing, transmission, storage, and retrieval systems or destroy data. |
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| First Eagle Global Fund | First Eagle Global Fund | Subsidiary Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | oef_RiskTextBlock | Subsidiary Risk — By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary’s investments. The Subsidiary is not registered under the Investment Company Act of 1940, as amended (the “1940 Act”) and is not subject to all of the investor protections of the 1940 Act. Changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/or the Subsidiary to operate as expected and could adversely affect the Fund. |
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| First Eagle Global Fund | First Eagle Global Fund | Class A | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | 5.00% | |||||||||||||||||||||||||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | oef_MaximumDeferredSalesChargeOverOfferingPrice | 1.00% | [1] | ||||||||||||||||||||||||||||||||||||||||
| Management Fees (as a percentage of Assets) | oef_ManagementFeesOverAssets | 0.75% | |||||||||||||||||||||||||||||||||||||||||
| Distribution and Service (12b-1) Fees | oef_DistributionAndService12b1FeesOverAssets | 0.25% | |||||||||||||||||||||||||||||||||||||||||
| Other Expenses (as a percentage of Assets): | oef_OtherExpensesOverAssets | 0.10% | |||||||||||||||||||||||||||||||||||||||||
| Expenses (as a percentage of Assets) | oef_ExpensesOverAssets | 1.10% | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 1 Year | oef_ExpenseExampleYear01 | $ 607 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 3 Years | oef_ExpenseExampleYear03 | 832 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 5 Years | oef_ExpenseExampleYear05 | 1,076 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 10 Years | oef_ExpenseExampleYear10 | 1,773 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 1 Year | oef_ExpenseExampleNoRedemptionYear01 | 607 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 3 Years | oef_ExpenseExampleNoRedemptionYear03 | 832 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 5 Years | oef_ExpenseExampleNoRedemptionYear05 | 1,076 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 10 Years | oef_ExpenseExampleNoRedemptionYear10 | $ 1,773 | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | First Eagle Global Fund | Class I | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | 0.00% | |||||||||||||||||||||||||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | oef_MaximumDeferredSalesChargeOverOfferingPrice | 0.00% | |||||||||||||||||||||||||||||||||||||||||
| Management Fees (as a percentage of Assets) | oef_ManagementFeesOverAssets | 0.75% | |||||||||||||||||||||||||||||||||||||||||
| Distribution and Service (12b-1) Fees | oef_DistributionAndService12b1FeesOverAssets | 0.00% | |||||||||||||||||||||||||||||||||||||||||
| Other Expenses (as a percentage of Assets): | oef_OtherExpensesOverAssets | 0.11% | |||||||||||||||||||||||||||||||||||||||||
| Expenses (as a percentage of Assets) | oef_ExpensesOverAssets | 0.86% | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 1 Year | oef_ExpenseExampleYear01 | $ 88 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 3 Years | oef_ExpenseExampleYear03 | 274 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 5 Years | oef_ExpenseExampleYear05 | 477 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 10 Years | oef_ExpenseExampleYear10 | 1,061 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 1 Year | oef_ExpenseExampleNoRedemptionYear01 | 88 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 3 Years | oef_ExpenseExampleNoRedemptionYear03 | 274 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 5 Years | oef_ExpenseExampleNoRedemptionYear05 | 477 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 10 Years | oef_ExpenseExampleNoRedemptionYear10 | $ 1,061 | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | First Eagle Global Fund | Class C | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | 0.00% | |||||||||||||||||||||||||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | oef_MaximumDeferredSalesChargeOverOfferingPrice | 1.00% | |||||||||||||||||||||||||||||||||||||||||
| Management Fees (as a percentage of Assets) | oef_ManagementFeesOverAssets | 0.75% | |||||||||||||||||||||||||||||||||||||||||
| Distribution and Service (12b-1) Fees | oef_DistributionAndService12b1FeesOverAssets | 1.00% | |||||||||||||||||||||||||||||||||||||||||
| Other Expenses (as a percentage of Assets): | oef_OtherExpensesOverAssets | 0.10% | |||||||||||||||||||||||||||||||||||||||||
| Expenses (as a percentage of Assets) | oef_ExpensesOverAssets | 1.85% | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 1 Year | oef_ExpenseExampleYear01 | $ 288 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 3 Years | oef_ExpenseExampleYear03 | 582 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 5 Years | oef_ExpenseExampleYear05 | 1,001 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 10 Years | oef_ExpenseExampleYear10 | 2,169 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 1 Year | oef_ExpenseExampleNoRedemptionYear01 | 188 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 3 Years | oef_ExpenseExampleNoRedemptionYear03 | 582 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 5 Years | oef_ExpenseExampleNoRedemptionYear05 | 1,001 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 10 Years | oef_ExpenseExampleNoRedemptionYear10 | $ 2,169 | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | First Eagle Global Fund | Class R6 | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice | 0.00% | |||||||||||||||||||||||||||||||||||||||||
| Maximum Deferred Sales Charge (as a percentage of Offering Price) | oef_MaximumDeferredSalesChargeOverOfferingPrice | 0.00% | |||||||||||||||||||||||||||||||||||||||||
| Management Fees (as a percentage of Assets) | oef_ManagementFeesOverAssets | 0.75% | |||||||||||||||||||||||||||||||||||||||||
| Distribution and Service (12b-1) Fees | oef_DistributionAndService12b1FeesOverAssets | 0.00% | |||||||||||||||||||||||||||||||||||||||||
| Other Expenses (as a percentage of Assets): | oef_OtherExpensesOverAssets | 0.03% | |||||||||||||||||||||||||||||||||||||||||
| Expenses (as a percentage of Assets) | oef_ExpensesOverAssets | 0.78% | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 1 Year | oef_ExpenseExampleYear01 | $ 80 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 3 Years | oef_ExpenseExampleYear03 | 249 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 5 Years | oef_ExpenseExampleYear05 | 433 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, with Redemption, 10 Years | oef_ExpenseExampleYear10 | 966 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 1 Year | oef_ExpenseExampleNoRedemptionYear01 | 80 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 3 Years | oef_ExpenseExampleNoRedemptionYear03 | 249 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 5 Years | oef_ExpenseExampleNoRedemptionYear05 | 433 | |||||||||||||||||||||||||||||||||||||||||
| Expense Example, No Redemption, 10 Years | oef_ExpenseExampleNoRedemptionYear10 | $ 966 | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | MSCI World Index (reflects no deduction for fees or expenses, but reflects net of withholding taxes) | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 21.09% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 12.15% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 12.17% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 12.30% | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | Class A | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Annual Return [Percent] | oef_AnnlRtrPct | 10.65% | |||||||||||||||||||||||||||||||||||||||||
| Annual Return [Percent] | oef_AnnlRtrPct | 13.49% | |||||||||||||||||||||||||||||||||||||||||
| Annual Return [Percent] | oef_AnnlRtrPct | (8.51%) | |||||||||||||||||||||||||||||||||||||||||
| Annual Return [Percent] | oef_AnnlRtrPct | 20.17% | |||||||||||||||||||||||||||||||||||||||||
| Annual Return [Percent] | oef_AnnlRtrPct | 8.30% | |||||||||||||||||||||||||||||||||||||||||
| Annual Return [Percent] | oef_AnnlRtrPct | 12.24% | |||||||||||||||||||||||||||||||||||||||||
| Annual Return [Percent] | oef_AnnlRtrPct | (6.48%) | |||||||||||||||||||||||||||||||||||||||||
| Annual Return [Percent] | oef_AnnlRtrPct | 12.80% | |||||||||||||||||||||||||||||||||||||||||
| Annual Return [Percent] | oef_AnnlRtrPct | 11.79% | |||||||||||||||||||||||||||||||||||||||||
| Annual Return [Percent] | oef_AnnlRtrPct | 31.57% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 24.99% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 10.60% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 9.48% | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | Class A | After Taxes on Distributions | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 21.67% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 8.99% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 8.11% | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | Class A | After Taxes on Distributions and Sales | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 15.89% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 7.99% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 7.33% | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | Class I | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 31.89% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 12.00% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 10.32% | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | Class C | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 29.59% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 10.89% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 9.21% | |||||||||||||||||||||||||||||||||||||||||
| First Eagle Global Fund | Class R6 | |||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | oef_ProspectusLineItems | ||||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 31.98% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 12.08% | |||||||||||||||||||||||||||||||||||||||||
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 9.90% | |||||||||||||||||||||||||||||||||||||||||
| Performance Inception Date | oef_PerfInceptionDate | Mar. 01, 2017 | |||||||||||||||||||||||||||||||||||||||||
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