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First Eagle Global Income Builder Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading First Eagle Global Income Builder Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

First Eagle Global Income Builder Fund (“Global Income Builder Fund”) seeks current income generation and long-term growth of capital.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Global Income Builder Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

The following information describes the fees and expenses you may pay if you buy and hold shares of the Global Income Builder Fund.


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 Income Builder 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 71 and 78, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Sales Load and Waiver Terms.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover Rate
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

There are transaction costs due to the bid/ask spread in the case of bonds or commissions in the case of stocks. The Global Income Builder Fund pays transaction costs when the Fund 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 Fund’s most recent fiscal year, the Fund’s portfolio turnover rate was 29.76% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 29.76%
Expense Breakpoint Discounts [Text] rr_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 Income Builder Fund.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 25,000
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates “Other Expenses” shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2016 and estimated expenses in the case of newly organized share classes.
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The following example is intended to help you compare the cost of investing in the Global Income Builder 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.
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Sold
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption Held
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

To achieve its objective of current income generation and long-term growth of capital, the Global Income Builder Fund will normally invest primarily in common stocks of U.S. and foreign companies that offer attractive dividend yields and a range of fixed income instruments, including high-yield, below investment grade instruments (commonly referred to as “junk bonds”), investment grade instruments and sovereign debt, from markets in the United States and multiple countries around the world.


Investment decisions for the Global Income Builder 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. Under normal circumstances, the Fund anticipates it will allocate a substantial amount of its assets to income-producing securities. That generally means that approximately 80% or more of the Fund’s net assets (plus any borrowings for investment purposes) will be allocated to such investments, which may include dividend paying equities, both high-yield (below investment grade) and investment grade debt, sovereign bonds, and various short-term debt instruments. The Fund may invest in securities with any maturity or investment rating, as well as unrated securities. The Fund may also invest (typically for hedging purposes) in derivative instruments such as options, futures contracts and options on futures contracts, credit default swaps, and swaps and options on indices.


Additionally, under normal circumstances, the Fund anticipates it will allocate a substantial amount of its assets to foreign investments. 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 80%, 40% and 30% of assets allocations, the Fund “counts” relevant derivative positions on investments, and in doing so, values each position at the price at which it is held on the Fund’s books.


The investment philosophy and strategy of the Global Income Builder Fund can be broadly characterized as a “value” approach, as it seeks a “margin of safety” in each investment purchase 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). With respect to equity investments in particular, a discount to “intrinsic value” is sought even for what appear to be 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. Investments in debt instruments are made after careful scrutiny of the underlying creditworthiness of the issuer, taking into account such factors as cash flow generation, liquidation value and structural protections. The Global Income Builder Fund seeks to own debt instruments that offer an attractive “margin of safety” on principal repayment relative to the total expected return of the security.
Risk [Heading] rr_RiskHeading Principal Investment Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

As with any mutual fund investment, you may lose money by investing in the Global Income Builder Fund. The likelihood of loss may be greater if you invest for a shorter period of time. An investment in the Fund is not intended to be a complete investment program.


Principal risks of investing in the Fund, which could adversely affect its net asset value and total return, are:


 

•

  

Market Risk — The value of the Fund’s portfolio holdings may fluctuate in response to events specific to the companies or markets in which the Fund invests, as well as economic, political, or social events in the United States or abroad.
 

•

  

Foreign Investment Risk — The Fund will invest in foreign investments. Foreign investments can be susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations.
 

•

  

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. 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. Longer-duration instruments tend to be more sensitive to interest rate changes than those with shorter durations.
 

•

  

Prepayment Risk — Certain instruments, especially mortgage-backed securities, for example, are susceptible to the risk of prepayment by borrowers. During a period of declining interest rates, homeowners may refinance their high-rate mortgages and prepay the principal. Cash from these prepayments flows through to prepay the mortgage-backed securities, necessitating reinvestment in other assets, which may lower returns. Asset-backed securities, which are subject to risks similar to those of mortgage-backed securities, are also structured like mortgage-backed securities, but instead of mortgage loans or interests in mortgage loans, the underlying assets may include such items as motor vehicle installment sales or installment loan contracts, leases of various types of real and personal property and receivables from credit card agreements. The market for mortgage-backed and asset-backed instruments may be volatile and limited, which may make them difficult to buy or sell.
 

•

  

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.
 

•

  

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 and credit rating and changes in interest rates and other general economic, industry and market conditions.
 

•

  

High Yield Risk — The Fund intends to invest in high yield instruments (commonly known as “junk bonds”) which may be subject to greater levels of interest rate, credit (including issuer default) and liquidity risk than investment grade instruments and may experience extreme price fluctuations. The securities of such companies may be considered speculative and the ability of such companies to pay their debts on schedule may be uncertain.
 

•

  

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 and leveraged loans, is generally less liquid than the market for higher-quality debt instruments.
 

•

  

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 that seeks to reduce the impact of foreign exchange rate changes on the Fund’s value. The Fund may at times also purchase derivatives linked to relevant market indices as either a hedge or for investment purposes.
 

•

  

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.
 

•

  

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.
 

•

  

Bank Loan Risk — The Fund may invest in bank loans. These investments potentially expose the Fund to the credit risk of the underlying borrower, and in certain cases, of the financial institution. The Fund’s ability to receive payments in connection with the loan depends primarily on the financial condition of the borrower. The market for bank loans may be illiquid and the Fund may have difficulty selling them, especially in the case of leveraged loans, which can be difficult to value. In addition, bank loans often have contractual restrictions on resale, which can delay the sale and adversely impact the sale price. At times, the Fund may decline to receive non-public information relating to loans, which could disadvantage the Fund relative to other investors.
 

•

  

Real Estate Industry Risk — The Fund may invest in real estate investment trusts (“REITs”), which are subject to risks affecting the real estate industry generally (including market conditions, competition, property obsolescence, changes in interest rates and casualty to real estate), as well as risks specifically affecting REITs (the quality and skill of REIT management and the internal expenses of the REIT).

For more information on the risks of investing in the Global Income Builder Fund, please see the More Information about the Funds’ Investments section.
Risk Lose Money [Text] rr_RiskLoseMoney As with any mutual fund investment, you may lose money by investing in the Global Income Builder Fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Investment Results
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following information provides an indication of the risks of investing in the Global Income Builder 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 a broad measure of market performance. 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 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 www.feim.com/individual-investors/fund/global-income-builder-fund or by calling 800.334.2143.


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.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides an indication of the risks of investing in the Global Income Builder 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 a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.334.2143
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.feim.com/individual-investors/fund/global-income-builder-fund
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture As with all mutual funds, past performance is not an indication of future performance (before or after taxes).
Bar Chart [Heading] rr_BarChartHeading Calendar Year Total Returns—Class A
Bar Chart Does Not Reflect Sales Loads [Text] rr_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 Footnotes [Text Block] rr_BarChartFootnotesTextBlock
 

*

  

For the period presented in the bar chart above.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

 

 

 

 

 

 

 

 

 

Best Quarter*

 

 

  

Worst Quarter*

Third Quarter 2013

  

5.09%

  

 

  

Third Quarter 2015

  

-6.08%

 

 

 

 

 
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2013
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 5.09%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (6.08%)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest individual 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 rr_PerformanceTableNotRelevantToTaxDeferred 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] rr_PerformanceTableOneClassOfAfterTaxShown The following table discloses after-tax returns only for Class A shares. After-tax returns for Class C, Class I, Class R3, Class R4, Class R5 and Class R6 shares will vary.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

The following table discloses after-tax returns only for Class A shares.


After-tax returns for Class C, Class I, Class R3, Class R4, Class R5 and Class R6 shares will vary. While no information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they are newly organized), annual returns for Class R3, Class R4, Class R5 and Class R6 shares would have been substantially similar to those shown here. Class R3, Class R4, Class R5 and Class R6 shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses.
Caption rr_AverageAnnualReturnCaption Average Annual Total Returns as of December 31, 2016
First Eagle Global Income Builder Fund | 60% MSCI World Index/40% Bloomberg Barclays U.S. Aggregate Bond Index  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.71%
Since Inception rr_AverageAnnualReturnSinceInception 6.28%
Inception Date rr_AverageAnnualReturnInceptionDate May 01, 2012
First Eagle Global Income Builder Fund | MSCI World Index  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 7.51%
Since Inception rr_AverageAnnualReturnSinceInception 8.81%
Inception Date rr_AverageAnnualReturnInceptionDate May 01, 2012
First Eagle Global Income Builder Fund | Bloomberg Barclays U.S. Aggregate Bond Index  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 2.65%
Since Inception rr_AverageAnnualReturnSinceInception 2.11%
Inception Date rr_AverageAnnualReturnInceptionDate May 01, 2012
First Eagle Global Income Builder Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.00%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price) rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.18% [2]
Total Annual Fund Operating Expenses (%) rr_ExpensesOverAssets 1.18%
Expenses Deferred Charges [Text Block] rr_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 Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 614
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 856
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,117
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,860
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 614
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 856
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,117
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,860
Annual Return 2013 rr_AnnualReturn2013 11.82%
Annual Return 2014 rr_AnnualReturn2014 1.24%
Annual Return 2015 rr_AnnualReturn2015 (2.30%)
Annual Return 2016 rr_AnnualReturn2016 10.11%
1 Year rr_AverageAnnualReturnYear01 4.64%
Since Inception rr_AverageAnnualReturnSinceInception 4.58%
Inception Date rr_AverageAnnualReturnInceptionDate May 01, 2012
First Eagle Global Income Builder Fund | Class A | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 3.50%
Since Inception rr_AverageAnnualReturnSinceInception 3.39%
First Eagle Global Income Builder Fund | Class A | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 2.89%
Since Inception rr_AverageAnnualReturnSinceInception 3.17%
First Eagle Global Income Builder Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.19% [2]
Total Annual Fund Operating Expenses (%) rr_ExpensesOverAssets 1.94%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 297
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 609
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,047
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,264
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 197
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 609
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,047
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,264
1 Year rr_AverageAnnualReturnYear01 8.31%
Since Inception rr_AverageAnnualReturnSinceInception 4.94%
Inception Date rr_AverageAnnualReturnInceptionDate May 01, 2012
First Eagle Global Income Builder Fund | Class I  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.17% [2]
Total Annual Fund Operating Expenses (%) rr_ExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 94
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 293
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 509
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,131
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 94
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 293
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 509
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,131
1 Year rr_AverageAnnualReturnYear01 10.30%
Since Inception rr_AverageAnnualReturnSinceInception 6.00%
Inception Date rr_AverageAnnualReturnInceptionDate May 01, 2012
First Eagle Global Income Builder Fund | Class R3  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.35%
Other Expenses rr_OtherExpensesOverAssets 0.28% [2]
Total Annual Fund Operating Expenses (%) rr_ExpensesOverAssets 1.38%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 140
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 437
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 755
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,657
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 140
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 437
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 755
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,657
First Eagle Global Income Builder Fund | Class R4  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.10%
Other Expenses rr_OtherExpensesOverAssets 0.28% [2]
Total Annual Fund Operating Expenses (%) rr_ExpensesOverAssets 1.13%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 115
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 359
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 622
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,375
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 115
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 359
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 622
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,375
First Eagle Global Income Builder Fund | Class R5  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.28% [2]
Total Annual Fund Operating Expenses (%) rr_ExpensesOverAssets 1.03%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 105
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 328
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 569
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,259
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 105
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 328
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 569
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,259
First Eagle Global Income Builder Fund | Class R6  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.75%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.13% [2]
Total Annual Fund Operating Expenses (%) rr_ExpensesOverAssets 0.88%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 90
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 281
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 488
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,084
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 90
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 281
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 488
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,084
[1] 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.
[2] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2016 and estimated expenses in the case of newly organized share classes.