485BPOS

As filed with the Securities and Exchange Commission on March 12, 2018

REGISTRATION NO. 033-63560 and 811-7762

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933	x
PRE-EFFECTIVE AMENDMENT NO.	o
POST-EFFECTIVE AMENDMENT NO. 88	x

AND/OR

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940	x
AMENDMENT NO. 90	x

(CHECK APPROPRIATE BOX OR BOXES)

FIRST EAGLE FUNDS

(EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)

1345 AVENUE OF THE AMERICAS

NEW YORK, NY 10105

(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)

REGISTRANT’S TELEPHONE NUMBER, INCLUDING AREA CODE: (212) 698-3000

SUZAN AFIFI

FIRST EAGLE FUNDS

1345 AVENUE OF THE AMERICAS

NEW YORK, NY 10105

(NAME AND ADDRESS OF AGENT FOR SERVICE)

COPY TO:

NATHAN J. GREENE, ESQ.

SHEARMAN & STERLING LLP

599 LEXINGTON AVENUE

NEW YORK, NY 10022

It is proposed that this filing will become effective (check appropriate box):

x immediately upon filing pursuant to paragraph (b)

o on (date) pursuant to paragraph (b) of Rule 485

o 60 days after filing pursuant to paragraph (a)(1)

o on (date) pursuant to paragraph (a)(1) of Rule 485

o 75 days after filing pursuant to paragraph (a)(2)

o on (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

o this post-effective amendment designates a new effective date for a previously filed post-effective amendment

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for the effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and the Registration has duly caused this Post-Effective Amendment to its Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York and State of New York, as of the 12^th day of March, 2018.

FIRST EAGLE FUNDS
By:	/s/ MEHDI MAHMUD
	MEHDI MAHMUD
	PRESIDENT

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to the Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

SIGNATURE	CAPACITY	DATE
/s/ LISA ANDERSON*	Trustee	March 12, 2018
(LISA ANDERSON)
/s/ JOHN P. ARNHOLD	Trustee	March 12, 2018
(JOHN P. ARNHOLD)
/s/ JEAN-MARIE EVEILLARD*	Trustee	March 12, 2018
(JEAN-MARIE EVEILLARD)
/s/ CANDACE K. BEINECKE*	Trustee	March 12, 2018
(CANDACE K. BEINECKE)
/s/ JEAN D. HAMILTON*	Trustee	March 12, 2018
(JEAN D. HAMILTON)
/s/ JAMES E. JORDAN*	Trustee	March 12, 2018
(JAMES E. JORDAN)
/s/ WILLIAM M. KELLY*	Trustee	March 12, 2018
(WILLIAM M. KELLY)
/s/ PAUL J. LAWLER*	Trustee	March 12, 2018
(PAUL J. LAWLER)
/s/ JOSEPH MALONE*	Chief Financial Officer	March 12, 2018
(JOSEPH MALONE)

*By:	/s/ SUZAN AFIFI
	SUZAN AFIFI
	POWER-OF-ATTORNEY

SIGNATURES

First Eagle Global Cayman Fund, Ltd., First Eagle Overseas Cayman Fund, Ltd., First Eagle U.S. Value Cayman Fund, Ltd. and First Eagle Gold Cayman Fund, Ltd. has duly cause this Post-Effective Amendment to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized in the City of New York and State of New York, as of the 12^th day of March, 2018.

FIRST EAGLE GLOBAL CAYMAN FUND, LTD.
FIRST EAGLE OVERSEAS CAYMAN FUND, LTD.
FIRST EAGLE U.S. VALUE CAYMAN FUND, LTD.
FIRST EAGLE GOLD CAYMAN FUND, LTD.

SIGNATURE	CAPACITY	DATE
/s/ PETER HUBER*	Director	March 12, 2018
(PETER HUBER)
/s/ GLENN MITCHELL*	Director	March 12, 2018
(GLENN MITCHELL)

*By:	/S/ SUZAN AFIFI
	Suzan Afifi Power-of-Attorney

EXHIBIT INDEX

Exhibit No.	Description
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

XML

Document and Entity Information	Total
Prospectus:
Document Type	485BPOS
Document Period End Date	Mar. 01, 2018
Registrant Name	FIRST EAGLE FUNDS
Central Index Key	0000906352
Amendment Flag	false
Document Creation Date	Feb. 28, 2018
Document Effective Date	Mar. 01, 2018
Prospectus Date	Mar. 01, 2018

XML

Multi-class Prospectus | First Eagle Global Fund

First Eagle Global Fund

Investment Objective

First Eagle Global Fund (“Global 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.

Fees and Expenses of the Global Fund

The following information describes the fees and expenses you may pay if you buy and hold shares of the Global 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 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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - Multi-class Prospectus - First Eagle Global Fund	Class A		Class C	Class I	Class R3	Class R4	Class R5	Class R6
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	5.00%		none	none	none	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	1.00%	[1]	1.00%	none	none	none	none	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Multi-class Prospectus - First Eagle Global Fund		Class A	Class C	Class I	Class R3	Class R4	Class R5	Class R6
Management Fees		0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	none	0.35%	0.10%	none	none
Other Expenses	[1]	0.11%	0.10%	0.09%	0.19%	0.19%	0.19%	0.03%
Total Annual Operating Expenses (%)		1.11%	1.85%	0.84%	1.29%	1.04%	0.94%	0.78%

Example

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.

Sold

Expense Example - Multi-class Prospectus - First Eagle Global Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	608	835	1,081	1,784
Class C	288	582	1,001	2,169
Class I	86	268	466	1,037
Class R3	131	409	708	1,556
Class R4	106	331	574	1,271
Class R5	96	300	520	1,155
Class R6	80	249	433	966

Held

Expense Example No Redemption - Multi-class Prospectus - First Eagle Global Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	608	835	1,081	1,784
Class C	188	582	1,001	2,169
Class I	86	268	466	1,037
Class R3	131	409	708	1,556
Class R4	106	331	574	1,271
Class R5	96	300	520	1,155
Class R6	80	249	433	966

Portfolio Turnover Rate

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, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 9.67% of the average value of its portfolio.

Principal Investment Strategies

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 fixed-income instruments (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. 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).

The investment philosophy and strategy of the Global 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). 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 contracts).

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in the Global 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 Global 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 may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations.

• 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.

• 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.

• 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, e.g., 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. 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.

• 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.

• 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.

• 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.

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.

For more information on the risks of investing in the Global Fund, please see the More Information about the Funds’ Investments section.

Investment Results

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 1, 5 and 10 years 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-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.

Calendar Year Total Returns—Class A

Best Quarter*		Worst Quarter*
Third Quarter 2009	14.58%	Fourth Quarter 2008	-10.66%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

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 or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Average Annual Returns - Multi-class Prospectus - First Eagle Global Fund	1 Year	5 Years	10 Years	Since Inception	Inception Date
Class A	7.80%	7.04%	6.05%
Class C	11.63%	7.33%	5.79%
Class I	13.78%	8.42%	6.87%
Class R6				8.21%	Mar. 01, 2017
After Taxes on Distributions | Class A	6.75%	6.03%	5.31%
After Taxes on Distributions and Sales of Fund Shares | Class A	5.27%	5.38%	4.81%
MSCI World Index	22.40%	11.64%	5.03%	15.17%	Mar. 01, 2017

[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.

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 and estimated expenses in the case of newly organized share classes.

XML

Label

Element

Value

Multi-class Prospectus | First Eagle Global Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle Global Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle Global Fund (“Global 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.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Global 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 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 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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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

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, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 9.67% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

9.67%

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 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, 2017 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 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 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 fixed-income instruments (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. 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).

The investment philosophy and strategy of the Global 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). 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 contracts).

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 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 Global 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 may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations.

• 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.

• 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.

• 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, e.g., 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. 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.

• 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.

• 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.

• 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.

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.

For more information on the risks of investing in the Global 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 Fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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-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 Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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-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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Third Quarter 2009	14.58%	Fourth Quarter 2008	-10.66%

* For the period presented in the bar chart above.

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

14.58%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(10.66%)

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 or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Multi-class Prospectus | First Eagle Global Fund | MSCI World Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

22.40%

5 Years

rr_AverageAnnualReturnYear05

11.64%

10 Years

rr_AverageAnnualReturnYear10

5.03%

Since Inception

rr_AverageAnnualReturnSinceInception

15.17%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

Multi-class Prospectus | First Eagle Global 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

0.11%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.11%

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

$ 608

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

835

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,081

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,784

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

608

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

835

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,081

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,784

Annual Return 2008

rr_AnnualReturn2008

(21.06%)

Annual Return 2009

rr_AnnualReturn2009

22.91%

Annual Return 2010

rr_AnnualReturn2010

17.58%

Annual Return 2011

rr_AnnualReturn2011

(0.19%)

Annual Return 2012

rr_AnnualReturn2012

12.46%

Annual Return 2013

rr_AnnualReturn2013

15.49%

Annual Return 2014

rr_AnnualReturn2014

2.93%

Annual Return 2015

rr_AnnualReturn2015

(0.94%)

Annual Return 2016

rr_AnnualReturn2016

10.65%

Annual Return 2017

rr_AnnualReturn2017

13.49%

1 Year

rr_AverageAnnualReturnYear01

7.80%

5 Years

rr_AverageAnnualReturnYear05

7.04%

10 Years

rr_AverageAnnualReturnYear10

6.05%

Multi-class Prospectus | First Eagle Global Fund | Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.75%

5 Years

rr_AverageAnnualReturnYear05

6.03%

10 Years

rr_AverageAnnualReturnYear10

5.31%

Multi-class Prospectus | First Eagle Global Fund | Class A | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.27%

5 Years

rr_AverageAnnualReturnYear05

5.38%

10 Years

rr_AverageAnnualReturnYear10

4.81%

Multi-class Prospectus | First Eagle Global 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

0.10%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.85%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 288

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

582

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,001

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,169

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

188

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

582

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,001

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,169

1 Year

rr_AverageAnnualReturnYear01

11.63%

5 Years

rr_AverageAnnualReturnYear05

7.33%

10 Years

rr_AverageAnnualReturnYear10

5.79%

Multi-class Prospectus | First Eagle Global 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

0.09%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

0.84%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 86

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

268

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

466

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,037

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

86

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

268

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

466

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,037

1 Year

rr_AverageAnnualReturnYear01

13.78%

5 Years

rr_AverageAnnualReturnYear05

8.42%

10 Years

rr_AverageAnnualReturnYear10

6.87%

Multi-class Prospectus | First Eagle Global 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

0.19%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.29%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 131

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

409

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

708

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,556

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

131

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

409

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

708

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,556

Multi-class Prospectus | First Eagle Global 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

0.19%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.04%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 106

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

331

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

574

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,271

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

106

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

331

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

574

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,271

Multi-class Prospectus | First Eagle Global 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

0.19%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

0.94%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 96

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

300

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

520

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,155

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

96

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

300

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

520

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,155

Multi-class Prospectus | First Eagle Global 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

0.03%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

0.78%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 80

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

249

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

433

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

966

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

80

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

249

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

433

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 966

Since Inception

rr_AverageAnnualReturnSinceInception

8.21%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

[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, 2017 and estimated expenses in the case of newly organized share classes.

XML

Multi-class Prospectus | First Eagle Overseas Fund

First Eagle Overseas Fund

Investment Objective

First Eagle Overseas Fund (“Overseas Fund”) seeks long-term growth of capital by investing primarily in equities issued by non-U.S. corporations.

Fees and Expenses of the Overseas Fund

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

Subject to certain exceptions, the Overseas Fund is currently closed to new investors and new accounts. You may find the exceptions in the About Your Investment—Overseas Fund All Share Classes (closed to new investors) section on page 87 of this Prospectus. If you are eligible to purchase shares, 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 Overseas 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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - Multi-class Prospectus - First Eagle Overseas Fund	Class A		Class C	Class I	Class R3	Class R4	Class R5	Class R6
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	5.00%		none	none	none	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	1.00%	[1]	1.00%	none	none	none	none	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Multi-class Prospectus - First Eagle Overseas Fund		Class A	Class C	Class I	Class R3	Class R4	Class R5	Class R6
Management Fees		0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	none	0.35%	0.10%	none	none
Other Expenses	[1]	0.15%	0.13%	0.12%	0.20%	0.20%	0.20%	0.04%
Total Annual Operating Expenses (%)		1.15%	1.88%	0.87%	1.30%	1.05%	0.95%	0.79%

Example

The following example is intended to help you compare the cost of investing in the Overseas 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.

Sold

Expense Example - Multi-class Prospectus - First Eagle Overseas Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	611	847	1,101	1,828
Class C	291	591	1,016	2,201
Class I	89	278	482	1,073
Class R3	132	412	713	1,568
Class R4	107	334	579	1,283
Class R5	97	303	525	1,166
Class R6	81	252	439	978

Held

Expense Example No Redemption - Multi-class Prospectus - First Eagle Overseas Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	611	847	1,101	1,828
Class C	191	591	1,016	2,201
Class I	89	278	482	1,073
Class R3	132	412	713	1,568
Class R4	107	334	579	1,283
Class R5	97	303	525	1,166
Class R6	81	252	439	978

Portfolio Turnover Rate

The Overseas Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 8.45% of the average value of its portfolio.

Principal Investment Strategies

To achieve its objective of long-term capital growth, the Overseas Fund will invest primarily in equity securities of non-U.S. companies, the majority of which are traded in mature markets (for example, Japan, Germany and France), and may invest in countries whose economies are still developing (sometimes called “emerging markets”). The Fund particularly seeks companies that have financial strength and stability, strong management and fundamental value. Normally, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in foreign securities and “counts” relevant derivative positions towards this “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price). The Fund also may invest up to 20% of its total assets in debt instruments. The Fund may invest in debt securities generally without regard to their credit rating or time to maturity. 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 invest in fixed-income instruments, short-term debt instruments, gold and other precious metals, and futures contracts related to precious metals.

The investment philosophy and strategy of the Overseas 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). 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 contracts).

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in the Overseas 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.

The principal risks of investing in the Overseas 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 may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations.

• Emerging Market Risk — When the Fund invests in emerging market securities (generally meaning those associated with less developed markets), the Fund may be exposed to market, credit, currency, liquidity, legal, political, technical and other risks different from, and generally greater than, the risks of investing in developed markets. Emerging market countries typically have less-established market economies than developed countries and may face greater social, economic, regulatory and political uncertainties. In addition, emerging markets typically present greater illiquidity and price volatility concerns due to smaller or limited local capital markets and greater difficulty in determining market valuations of securities due to limited public information on issuers.

• 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.

• 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, e.g., 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. 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.

• 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.

• 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.

• 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.

• 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.

• 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 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.

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.

For more information on the risks of investing in the Overseas Fund, please see the More Information about the Funds’ Investments section.

Investment Results

The following information provides an indication of the risks of investing in the Overseas Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/overseas-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.

Calendar Year Total Returns—Class A

Best Quarter*		Worst Quarter*
Second Quarter 2009	16.58%	Third Quarter 2008	-12.48%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

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 or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Average Annual Returns - Multi-class Prospectus - First Eagle Overseas Fund	1 Year	5 Years	10 Years	Since Inception	Inception Date
Class A	8.34%	5.27%	4.69%
Class C	12.22%	5.57%	4.45%
Class I	14.37%	6.64%	5.50%
Class R6				9.00%	Mar. 01, 2017
After Taxes on Distributions | Class A	7.49%	4.36%	3.85%
After Taxes on Distributions and Sales of Fund Shares | Class A	5.42%	4.03%	3.71%
MSCI EAFE Index	25.03%	7.90%	1.94%	19.31%	Mar. 01, 2017

[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.

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 and estimated expenses in the case of newly organized share classes.

XML

Label

Element

Value

Multi-class Prospectus | First Eagle Overseas Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle Overseas Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle Overseas Fund (“Overseas Fund”) seeks long-term growth of capital by investing primarily in equities issued by non-U.S. corporations.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Overseas 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 Overseas Fund.

Subject to certain exceptions, the Overseas Fund is currently closed to new investors and new accounts. You may find the exceptions in the About Your Investment—Overseas Fund All Share Classes (closed to new investors) section on page 87 of this Prospectus. If you are eligible to purchase shares, 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 Overseas 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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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

The Overseas Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 8.45% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

8.45%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

If you are eligible to purchase shares, 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 Overseas 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, 2017 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 Overseas 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 long-term capital growth, the Overseas Fund will invest primarily in equity securities of non-U.S. companies, the majority of which are traded in mature markets (for example, Japan, Germany and France), and may invest in countries whose economies are still developing (sometimes called “emerging markets”). The Fund particularly seeks companies that have financial strength and stability, strong management and fundamental value. Normally, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in foreign securities and “counts” relevant derivative positions towards this “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price). The Fund also may invest up to 20% of its total assets in debt instruments. The Fund may invest in debt securities generally without regard to their credit rating or time to maturity. 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 invest in fixed-income instruments, short-term debt instruments, gold and other precious metals, and futures contracts related to precious metals.

The investment philosophy and strategy of the Overseas 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). 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 contracts).

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 Overseas 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.

The principal risks of investing in the Overseas 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 may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations.

• Emerging Market Risk — When the Fund invests in emerging market securities (generally meaning those associated with less developed markets), the Fund may be exposed to market, credit, currency, liquidity, legal, political, technical and other risks different from, and generally greater than, the risks of investing in developed markets. Emerging market countries typically have less-established market economies than developed countries and may face greater social, economic, regulatory and political uncertainties. In addition, emerging markets typically present greater illiquidity and price volatility concerns due to smaller or limited local capital markets and greater difficulty in determining market valuations of securities due to limited public information on issuers.

• 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.

• 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, e.g., 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. 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.

• 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.

• 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.

• 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.

• 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.

• 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 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.

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.

For more information on the risks of investing in the Overseas 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 Overseas Fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 Overseas Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/overseas-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 Overseas Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/overseas-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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Second Quarter 2009	16.58%	Third Quarter 2008	-12.48%

* For the period presented in the bar chart above.

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

16.58%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(12.48%)

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 or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Multi-class Prospectus | First Eagle Overseas Fund | MSCI EAFE Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

25.03%

5 Years

rr_AverageAnnualReturnYear05

7.90%

10 Years

rr_AverageAnnualReturnYear10

1.94%

Since Inception

rr_AverageAnnualReturnSinceInception

19.31%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

Multi-class Prospectus | First Eagle Overseas 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

0.15%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.15%

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

$ 611

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

847

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,101

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,828

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

611

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

847

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,101

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,828

Annual Return 2008

rr_AnnualReturn2008

(20.97%)

Annual Return 2009

rr_AnnualReturn2009

20.64%

Annual Return 2010

rr_AnnualReturn2010

19.24%

Annual Return 2011

rr_AnnualReturn2011

(5.60%)

Annual Return 2012

rr_AnnualReturn2012

13.98%

Annual Return 2013

rr_AnnualReturn2013

11.57%

Annual Return 2014

rr_AnnualReturn2014

(0.97%)

Annual Return 2015

rr_AnnualReturn2015

2.27%

Annual Return 2016

rr_AnnualReturn2016

5.59%

Annual Return 2017

rr_AnnualReturn2017

14.05%

1 Year

rr_AverageAnnualReturnYear01

8.34%

5 Years

rr_AverageAnnualReturnYear05

5.27%

10 Years

rr_AverageAnnualReturnYear10

4.69%

Multi-class Prospectus | First Eagle Overseas Fund | Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.49%

5 Years

rr_AverageAnnualReturnYear05

4.36%

10 Years

rr_AverageAnnualReturnYear10

3.85%

Multi-class Prospectus | First Eagle Overseas Fund | Class A | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.42%

5 Years

rr_AverageAnnualReturnYear05

4.03%

10 Years

rr_AverageAnnualReturnYear10

3.71%

Multi-class Prospectus | First Eagle Overseas 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

0.13%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.88%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 291

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

591

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,016

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,201

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

191

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

591

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,016

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,201

1 Year

rr_AverageAnnualReturnYear01

12.22%

5 Years

rr_AverageAnnualReturnYear05

5.57%

10 Years

rr_AverageAnnualReturnYear10

4.45%

Multi-class Prospectus | First Eagle Overseas 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

0.12%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

0.87%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 89

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

278

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

482

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,073

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

89

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

278

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

482

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,073

1 Year

rr_AverageAnnualReturnYear01

14.37%

5 Years

rr_AverageAnnualReturnYear05

6.64%

10 Years

rr_AverageAnnualReturnYear10

5.50%

Multi-class Prospectus | First Eagle Overseas 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

0.20%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.30%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 132

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

412

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

713

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,568

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

132

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

412

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

713

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,568

Multi-class Prospectus | First Eagle Overseas 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

0.20%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.05%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 107

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

334

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

579

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,283

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

107

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

334

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

579

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,283

Multi-class Prospectus | First Eagle Overseas 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

0.20%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

0.95%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 97

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

303

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

525

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,166

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

97

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

303

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

525

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,166

Multi-class Prospectus | First Eagle Overseas 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

0.04%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

0.79%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 81

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

252

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

439

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

978

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

81

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

252

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

439

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 978

Since Inception

rr_AverageAnnualReturnSinceInception

9.00%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

[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, 2017 and estimated expenses in the case of newly organized share classes.

XML

Multi-class Prospectus | First Eagle U.S. Value Fund

First Eagle U.S. Value Fund

Investment Objective

First Eagle U.S. Value Fund (“U.S. Value Fund”) seeks long-term growth of capital by investing, under normal market conditions, at least 80% of its net assets (plus any borrowings for investment purposes) in domestic equity and debt securities.

Fees and Expenses of the U.S. Value Fund

The following information describes the fees and expenses you may pay if you buy and hold shares of the U.S. Value 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 U.S. Value 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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - Multi-class Prospectus - First Eagle U.S. Value Fund	Class A		Class C	Class I	Class R3	Class R4	Class R5	Class R6
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	5.00%		none	none	none	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	1.00%	[1]	1.00%	none	none	none	none	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Multi-class Prospectus - First Eagle U.S. Value Fund		Class A	Class C	Class I	Class R3	Class R4	Class R5	Class R6
Management Fees	[1]	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	none	0.35%	0.10%	none	none
Other Expenses	[2]	0.14%	0.14%	0.11%	0.22%	0.22%	0.22%	0.10%
Total Annual Operating Expenses (%)		1.14%	1.89%	0.86%	1.32%	1.07%	0.97%	0.85%
Fee Waiver	[1]	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)
Total Annual Operating Expenses After Fee Waiver (%)		1.09%	1.84%	0.81%	1.27%	1.02%	0.92%	0.80%

Example

The following example is intended to help you compare the cost of investing in the U.S. Value 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 (except that the management fee waiver is taken into account only for the one-year expense example). Please keep in mind your actual costs may be higher or lower.

Sold

Expense Example - Multi-class Prospectus - First Eagle U.S. Value Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	606	839	1,092	1,813
Class C	287	589	1,017	2,207
Class I	83	269	472	1,056
Class R3	129	413	719	1,586
Class R4	104	335	585	1,301
Class R5	94	304	531	1,185
Class R6	82	266	466	1,044

Held

Expense Example No Redemption - Multi-class Prospectus - First Eagle U.S. Value Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	606	839	1,092	1,813
Class C	187	589	1,017	2,207
Class I	83	269	472	1,056
Class R3	129	413	719	1,586
Class R4	104	335	585	1,301
Class R5	94	304	531	1,185
Class R6	82	266	466	1,044

Portfolio Turnover Rate

The U.S. Value Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 5.85% of the average value of its portfolio.

Principal Investment Strategies

To achieve its objective of long-term capital growth, the U.S. Value Fund will normally invest at least 80% of its net assets (plus any borrowings for investment purposes) in domestic equity and debt instruments and may invest to a lesser extent in securities of non-U.S. issuers. In particular, the Fund seeks companies exhibiting financial strength and stability, strong management and fundamental value. 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 debt instruments in which the Fund may invest include fixed-income securities without regard to credit rating or time to maturity and short-term debt instruments. The Fund may also invest in gold and other precious metals, and futures contracts related to precious metals. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The investment philosophy and strategy of the U.S. Value 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). 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 contracts).

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in the U.S. Value 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 U.S. Value 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.

• 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, e.g., 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. 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.

• 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.

• 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.

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

• 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 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.

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.

For more information on the risks of investing in the U.S. Value Fund, please see the More Information about the Funds’ Investments section.

Investment Results

The following information provides an indication of the risks of investing in the U.S. Value Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/us-value-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.

Calendar Year Total Returns—Class A

Best Quarter*		Worst Quarter*
Second Quarter 2009	12.57%	Fourth Quarter 2008	-16.90%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

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 or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Average Annual Returns - Multi-class Prospectus - First Eagle U.S. Value Fund	1 Year	5 Years	10 Years	Since Inception	Inception Date
Class A	7.17%	8.09%	6.40%
Class C	10.89%	8.38%	6.15%
Class I	13.04%	9.49%	7.23%
Class R6				7.83%	Mar. 01, 2017
After Taxes on Distributions | Class A	5.05%	6.47%	5.37%
After Taxes on Distributions and Sales of Fund Shares | Class A	5.76%	6.18%	5.03%
Standard & Poor’s 500 Index	21.83%	15.79%	8.50%	13.43%	Mar. 01, 2017

[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.

[1] The Adviser has contractually agreed to waive its management fee at an annual rate in the amount of 0.05% of the average daily value of the Fund's net assets for the period through February 28, 2019. This waiver has the effect of reducing the management fee shown in the table for the term of the waiver from 0.75% to 0.70%.

[2] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 and estimated expenses in the case of newly organized share classes.

XML

Label

Element

Value

Multi-class Prospectus | First Eagle U.S. Value Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle U.S. Value Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle U.S. Value Fund (“U.S. Value Fund”) seeks long-term growth of capital by investing, under normal market conditions, at least 80% of its net assets (plus any borrowings for investment purposes) in domestic equity and debt securities.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the U.S. Value 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 U.S. Value 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 U.S. Value 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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

Feb. 28, 2019

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover Rate

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The U.S. Value Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 5.85% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

5.85%

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 U.S. Value 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, 2017 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 U.S. Value 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 (except that the management fee waiver is taken into account only for the one-year expense example). 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 long-term capital growth, the U.S. Value Fund will normally invest at least 80% of its net assets (plus any borrowings for investment purposes) in domestic equity and debt instruments and may invest to a lesser extent in securities of non-U.S. issuers. In particular, the Fund seeks companies exhibiting financial strength and stability, strong management and fundamental value. 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 debt instruments in which the Fund may invest include fixed-income securities without regard to credit rating or time to maturity and short-term debt instruments. The Fund may also invest in gold and other precious metals, and futures contracts related to precious metals. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The investment philosophy and strategy of the U.S. Value 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). 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 contracts).

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 U.S. Value 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 U.S. Value 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.

• 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, e.g., 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. 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.

• 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.

• 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.

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

• 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 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.

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.

For more information on the risks of investing in the U.S. Value 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 U.S. Value Fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 U.S. Value Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/us-value-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 U.S. Value Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/us-value-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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Second Quarter 2009	12.57%	Fourth Quarter 2008	-16.90%

* For the period presented in the bar chart above.

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

12.57%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(16.90%)

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 or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Multi-class Prospectus | First Eagle U.S. Value Fund | Standard & Poor’s 500 Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

21.83%

5 Years

rr_AverageAnnualReturnYear05

15.79%

10 Years

rr_AverageAnnualReturnYear10

8.50%

Since Inception

rr_AverageAnnualReturnSinceInception

13.43%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

Multi-class Prospectus | First Eagle U.S. Value 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%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.14%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.14%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

1.09%

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

$ 606

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

839

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,092

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,813

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

606

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

839

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,092

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,813

Annual Return 2008

rr_AnnualReturn2008

(23.09%)

Annual Return 2009

rr_AnnualReturn2009

24.84%

Annual Return 2010

rr_AnnualReturn2010

12.22%

Annual Return 2011

rr_AnnualReturn2011

5.70%

Annual Return 2012

rr_AnnualReturn2012

10.71%

Annual Return 2013

rr_AnnualReturn2013

16.94%

Annual Return 2014

rr_AnnualReturn2014

8.15%

Annual Return 2015

rr_AnnualReturn2015

(5.14%)

Annual Return 2016

rr_AnnualReturn2016

14.77%

Annual Return 2017

rr_AnnualReturn2017

12.79%

1 Year

rr_AverageAnnualReturnYear01

7.17%

5 Years

rr_AverageAnnualReturnYear05

8.09%

10 Years

rr_AverageAnnualReturnYear10

6.40%

Multi-class Prospectus | First Eagle U.S. Value Fund | Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.05%

5 Years

rr_AverageAnnualReturnYear05

6.47%

10 Years

rr_AverageAnnualReturnYear10

5.37%

Multi-class Prospectus | First Eagle U.S. Value Fund | Class A | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.76%

5 Years

rr_AverageAnnualReturnYear05

6.18%

10 Years

rr_AverageAnnualReturnYear10

5.03%

Multi-class Prospectus | First Eagle U.S. Value 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%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.14%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.89%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

1.84%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 287

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

589

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,017

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,207

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

187

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

589

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,017

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,207

1 Year

rr_AverageAnnualReturnYear01

10.89%

5 Years

rr_AverageAnnualReturnYear05

8.38%

10 Years

rr_AverageAnnualReturnYear10

6.15%

Multi-class Prospectus | First Eagle U.S. Value 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%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.11%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

0.86%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

0.81%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 83

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

269

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

472

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,056

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

83

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

269

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

472

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,056

1 Year

rr_AverageAnnualReturnYear01

13.04%

5 Years

rr_AverageAnnualReturnYear05

9.49%

10 Years

rr_AverageAnnualReturnYear10

7.23%

Multi-class Prospectus | First Eagle U.S. Value 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%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.35%

Other Expenses

rr_OtherExpensesOverAssets

0.22%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.32%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

1.27%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 129

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

413

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

719

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,586

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

129

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

413

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

719

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,586

Multi-class Prospectus | First Eagle U.S. Value 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%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.10%

Other Expenses

rr_OtherExpensesOverAssets

0.22%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.07%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

1.02%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 104

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

335

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

585

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,301

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

104

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

335

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

585

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,301

Multi-class Prospectus | First Eagle U.S. Value 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%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.22%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

0.97%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

0.92%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 94

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

304

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

531

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,185

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

94

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

304

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

531

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,185

Multi-class Prospectus | First Eagle U.S. Value 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%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.10%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

0.85%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

0.80%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 82

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

266

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

466

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,044

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

82

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

266

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

466

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,044

Since Inception

rr_AverageAnnualReturnSinceInception

7.83%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

[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] The Adviser has contractually agreed to waive its management fee at an annual rate in the amount of 0.05% of the average daily value of the Fund's net assets for the period through February 28, 2019. This waiver has the effect of reducing the management fee shown in the table for the term of the waiver from 0.75% to 0.70%.

[3] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 and estimated expenses in the case of newly organized share classes.

XML

Multi-class Prospectus | First Eagle Gold Fund

First Eagle Gold Fund

Investment Objective

First Eagle Gold Fund (“Gold Fund”) seeks to provide investors the opportunity to participate in the investment characteristics of gold (and to a limited extent other precious metals) for a portion of their overall investment portfolio.

Fees and Expenses of the Gold Fund

The following information describes the fees and expenses you may pay if you buy and hold shares of the Gold 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 Gold 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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - Multi-class Prospectus - First Eagle Gold Fund	Class A		Class C	Class I	Class R3	Class R4	Class R5	Class R6
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	5.00%		none	none	none	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	1.00%	[1]	1.00%	none	none	none	none	none
Redemption Fee (as a percentage of the amount redeemed within 60 days of purchase)	2.00%		2.00%	2.00%	2.00%	2.00%	2.00%	2.00%

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Multi-class Prospectus - First Eagle Gold Fund		Class A	Class C	Class I	Class R3	Class R4	Class R5	Class R6
Management Fees		0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	none	0.35%	0.10%	none	none
Other Expenses	[1]	0.26%	0.29%	0.24%	0.25%	0.25%	0.25%	0.15%
Total Annual Operating Expenses (%)		1.26%	2.04%	0.99%	1.35%	1.10%	1.00%	0.90%

Example

The following example is intended to help you compare the cost of investing in the Gold 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.

Sold

Expense Example - Multi-class Prospectus - First Eagle Gold Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	622	880	1,157	1,946
Class C	307	640	1,098	2,369
Class I	101	315	547	1,213
Class R3	137	428	739	1,624
Class R4	112	350	606	1,340
Class R5	102	318	552	1,225
Class R6	92	287	498	1,108

Held

Expense Example No Redemption - Multi-class Prospectus - First Eagle Gold Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	622	880	1,157	1,946
Class C	207	640	1,098	2,369
Class I	101	315	547	1,213
Class R3	137	428	739	1,624
Class R4	112	350	606	1,340
Class R5	102	318	552	1,225
Class R6	92	287	498	1,108

Portfolio Turnover Rate

The Gold Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 7.90% of the average value of its portfolio.

Principal Investment Strategies

To achieve its objective of providing investors the opportunity to participate in the investment characteristics of gold, the Gold Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in gold and/or securities (which may include both equity and, to a limited extent, debt instruments) directly related to gold or issuers principally engaged in the gold industry, including securities of gold mining finance companies as well as operating companies with long-, medium- or short-life mines. Up to 20% of the Fund’s assets may be invested in equity and, to a limited extent, debt instruments unrelated to gold or the gold industry. The Fund may invest up to 20% of its total assets in debt securities. 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 fixed-income instruments (without regard to credit rating or time to maturity), short-term debt instruments, other precious metals, and futures contracts related to precious metals. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

An investment in the Gold Fund is not intended to be a complete investment program. However, many investors believe that, historically, a limited exposure to investments in gold or gold-related instruments may provide some offset against the market impact of political and economic disruptions, as well as relieve inflationary or deflationary pressures.

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 contracts). The Fund will invest in the Subsidiary in order to gain exposure to the commodities markets within the limitations of the federal tax laws, rules and regulations that apply to regulated investment companies. Unlike the Fund, the Subsidiary may invest without limitation in commodities and related instruments, however, the Subsidiary will comply with the same 1940 Act asset coverage requirements with respect to any investments in commodity-linked derivatives that are applicable to the Fund’s transactions in derivatives. In addition, to the extent applicable to the investment activities of the Subsidiary, the Subsidiary will be subject to the same fundamental investment restrictions and will follow the same compliance policies and procedures as the Fund. Compliance with the Fund’s investment restrictions generally will be measured on an aggregate basis in respect of the Fund’s and the Subsidiary’s portfolios. The Subsidiary will comply with the 1940 Act provisions governing affiliate transactions and custody of assets. The Fund is the sole shareholder of the Subsidiary and does not expect shares of the Subsidiary to be offered or sold to other investors.

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in the Gold 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 Gold 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.

• 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.

• 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.

• Foreign Investment Risk — The Fund may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations. These risks may be more pronounced with respect to investments in emerging markets. Because of the Gold Fund’s policy of investing primarily in gold, securities directly related to gold and/or of companies engaged in the gold industry, a substantial part of the Gold Fund’s assets will generally be invested in securities of companies domiciled or operating in one or more foreign countries, including emerging markets.

• Diversification Risk — The Fund is a non-diversified mutual fund, and as a result, an investment in the Fund may expose your money to greater risks than if you invest in a diversified fund. The Fund may invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

• 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.

• 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, e.g., 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. 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.

• 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.

• 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 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.

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.

For more information on the risks of investing in the Gold Fund, please see the More Information about the Funds’ Investments section.

Investment Results

The following information provides an indication of the risks of investing in the Gold Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/gold-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.

Calendar Year Total Returns—Class A

Best Quarter*		Worst Quarter*
First Quarter 2016	32.55%	Second Quarter 2013	-32.24%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

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 or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Average Annual Returns - Multi-class Prospectus - First Eagle Gold Fund	1 Year	5 Years	10 Years	Since Inception	Inception Date
Class A	2.73%	(10.10%)	(2.26%)
Class C	6.37%	(9.88%)	(2.51%)
Class I	8.44%	(8.92%)	(1.51%)
Class R6				(1.36%)	Mar. 01, 2017
After Taxes on Distributions | Class A	2.73%	(10.10%)	(2.58%)
After Taxes on Distributions and Sales of Fund Shares | Class A	1.55%	(7.27%)	(1.47%)
MSCI World Index	22.40%	11.64%	5.03%	15.17%	Mar. 01, 2017
FTSE Gold Mines Index	9.11%	(11.48%)	(6.36%)	(0.17%)	Mar. 01, 2017

[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.

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 and estimated expenses in the case of newly organized share classes.

XML

Label

Element

Value

Multi-class Prospectus | First Eagle Gold Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle Gold Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle Gold Fund (“Gold Fund”) seeks to provide investors the opportunity to participate in the investment characteristics of gold (and to a limited extent other precious metals) for a portion of their overall investment portfolio.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Gold 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 Gold 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 Gold 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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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

The Gold Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 7.90% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

7.90%

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 Gold 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, 2017 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 Gold 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 providing investors the opportunity to participate in the investment characteristics of gold, the Gold Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in gold and/or securities (which may include both equity and, to a limited extent, debt instruments) directly related to gold or issuers principally engaged in the gold industry, including securities of gold mining finance companies as well as operating companies with long-, medium- or short-life mines. Up to 20% of the Fund’s assets may be invested in equity and, to a limited extent, debt instruments unrelated to gold or the gold industry. The Fund may invest up to 20% of its total assets in debt securities. 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 fixed-income instruments (without regard to credit rating or time to maturity), short-term debt instruments, other precious metals, and futures contracts related to precious metals. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

An investment in the Gold Fund is not intended to be a complete investment program. However, many investors believe that, historically, a limited exposure to investments in gold or gold-related instruments may provide some offset against the market impact of political and economic disruptions, as well as relieve inflationary or deflationary pressures.

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 contracts). The Fund will invest in the Subsidiary in order to gain exposure to the commodities markets within the limitations of the federal tax laws, rules and regulations that apply to regulated investment companies. Unlike the Fund, the Subsidiary may invest without limitation in commodities and related instruments, however, the Subsidiary will comply with the same 1940 Act asset coverage requirements with respect to any investments in commodity-linked derivatives that are applicable to the Fund’s transactions in derivatives. In addition, to the extent applicable to the investment activities of the Subsidiary, the Subsidiary will be subject to the same fundamental investment restrictions and will follow the same compliance policies and procedures as the Fund. Compliance with the Fund’s investment restrictions generally will be measured on an aggregate basis in respect of the Fund’s and the Subsidiary’s portfolios. The Subsidiary will comply with the 1940 Act provisions governing affiliate transactions and custody of assets. The Fund is the sole shareholder of the Subsidiary and does not expect shares of the Subsidiary to be offered or sold to other investors.

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 Gold 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 Gold 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.

• 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.

• 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.

• Foreign Investment Risk — The Fund may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations. These risks may be more pronounced with respect to investments in emerging markets. Because of the Gold Fund’s policy of investing primarily in gold, securities directly related to gold and/or of companies engaged in the gold industry, a substantial part of the Gold Fund’s assets will generally be invested in securities of companies domiciled or operating in one or more foreign countries, including emerging markets.

• Diversification Risk — The Fund is a non-diversified mutual fund, and as a result, an investment in the Fund may expose your money to greater risks than if you invest in a diversified fund. The Fund may invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

• 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.

• 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, e.g., 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. 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.

• 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.

• 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 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.

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.

For more information on the risks of investing in the Gold 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 Gold Fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Fund is a non-diversified mutual fund, and as a result, an investment in the Fund may expose your money to greater risks than if you invest in a diversified fund. The Fund may invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 Gold Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/gold-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 Gold Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/gold-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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
First Quarter 2016	32.55%	Second Quarter 2013	-32.24%

* For the period presented in the bar chart above.

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

32.55%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2013

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(32.24%)

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 or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Multi-class Prospectus | First Eagle Gold Fund | MSCI World Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

22.40%

5 Years

rr_AverageAnnualReturnYear05

11.64%

10 Years

rr_AverageAnnualReturnYear10

5.03%

Since Inception

rr_AverageAnnualReturnSinceInception

15.17%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

Multi-class Prospectus | First Eagle Gold Fund | FTSE Gold Mines Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.11%

5 Years

rr_AverageAnnualReturnYear05

(11.48%)

10 Years

rr_AverageAnnualReturnYear10

(6.36%)

Since Inception

rr_AverageAnnualReturnSinceInception

(0.17%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

Multi-class Prospectus | First Eagle Gold 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]

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(2.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.26%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.26%

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

$ 622

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

880

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,157

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,946

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

622

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

880

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,157

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,946

Annual Return 2008

rr_AnnualReturn2008

(14.27%)

Annual Return 2009

rr_AnnualReturn2009

39.18%

Annual Return 2010

rr_AnnualReturn2010

34.64%

Annual Return 2011

rr_AnnualReturn2011

(11.13%)

Annual Return 2012

rr_AnnualReturn2012

(5.15%)

Annual Return 2013

rr_AnnualReturn2013

(46.99%)

Annual Return 2014

rr_AnnualReturn2014

(2.41%)

Annual Return 2015

rr_AnnualReturn2015

(19.28%)

Annual Return 2016

rr_AnnualReturn2016

36.92%

Annual Return 2017

rr_AnnualReturn2017

8.12%

1 Year

rr_AverageAnnualReturnYear01

2.73%

5 Years

rr_AverageAnnualReturnYear05

(10.10%)

10 Years

rr_AverageAnnualReturnYear10

(2.26%)

Multi-class Prospectus | First Eagle Gold Fund | Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.73%

5 Years

rr_AverageAnnualReturnYear05

(10.10%)

10 Years

rr_AverageAnnualReturnYear10

(2.58%)

Multi-class Prospectus | First Eagle Gold Fund | Class A | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.55%

5 Years

rr_AverageAnnualReturnYear05

(7.27%)

10 Years

rr_AverageAnnualReturnYear10

(1.47%)

Multi-class Prospectus | First Eagle Gold 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%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(2.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.29%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

2.04%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 307

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

640

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,098

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,369

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

207

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

640

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,098

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,369

1 Year

rr_AverageAnnualReturnYear01

6.37%

5 Years

rr_AverageAnnualReturnYear05

(9.88%)

10 Years

rr_AverageAnnualReturnYear10

(2.51%)

Multi-class Prospectus | First Eagle Gold 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

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(2.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.24%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

0.99%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 101

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

315

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

547

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,213

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

101

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

315

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

547

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,213

1 Year

rr_AverageAnnualReturnYear01

8.44%

5 Years

rr_AverageAnnualReturnYear05

(8.92%)

10 Years

rr_AverageAnnualReturnYear10

(1.51%)

Multi-class Prospectus | First Eagle Gold 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

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(2.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.35%

Other Expenses

rr_OtherExpensesOverAssets

0.25%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.35%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 137

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

428

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

739

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,624

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

137

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

428

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

739

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,624

Multi-class Prospectus | First Eagle Gold 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

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(2.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.10%

Other Expenses

rr_OtherExpensesOverAssets

0.25%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.10%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 112

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

350

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

606

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,340

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

112

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

350

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

606

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,340

Multi-class Prospectus | First Eagle Gold 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

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(2.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.25%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.00%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 102

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

318

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

552

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,225

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

102

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

318

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

552

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,225

Multi-class Prospectus | First Eagle Gold 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

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(2.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.15%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

0.90%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 92

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

287

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

498

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,108

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

92

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

287

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

498

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,108

Since Inception

rr_AverageAnnualReturnSinceInception

(1.36%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

[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, 2017 and estimated expenses in the case of newly organized share classes.

XML

Multi-class Prospectus | First Eagle Global Income Builder Fund

First Eagle Global Income Builder Fund

Investment Objective

First Eagle Global Income Builder Fund (“Global Income Builder Fund”) seeks current income generation and long-term growth of capital.

Fees and Expenses of the Global Income Builder Fund

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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - Multi-class Prospectus - First Eagle Global Income Builder Fund	Class A		Class C	Class I	Class R3	Class R4	Class R5	Class R6
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	5.00%		none	none	none	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	1.00%	[1]	1.00%	none	none	none	none	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Multi-class Prospectus - First Eagle Global Income Builder Fund		Class A	Class C	Class I	Class R3	Class R4	Class R5	Class R6
Management Fees		0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	none	0.35%	0.10%	none	none
Other Expenses	[1]	0.19%	0.19%	0.18%	0.24%	0.24%	0.24%	0.14%
Total Annual Fund Operating Expenses (%)		1.19%	1.94%	0.93%	1.34%	1.09%	0.99%	0.89%

Example

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.

Sold

Expense Example - Multi-class Prospectus - First Eagle Global Income Builder Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	615	859	1,122	1,871
Class C	297	609	1,047	2,264
Class I	95	296	515	1,143
Class R3	136	425	734	1,613
Class R4	111	347	601	1,329
Class R5	101	315	547	1,213
Class R6	91	284	493	1,096

Held

Expense Example No Redemption - Multi-class Prospectus - First Eagle Global Income Builder Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	615	859	1,122	1,871
Class C	197	609	1,047	2,264
Class I	95	296	515	1,143
Class R3	136	425	734	1,613
Class R4	111	347	601	1,329
Class R5	101	315	547	1,213
Class R6	91	284	493	1,096

Portfolio Turnover Rate

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 23.18% of the average value of its portfolio.

Principal Investment Strategies

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 (generally market price).

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.

Principal Investment Risks

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.

• 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.

• 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).

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.

For more information on the risks of investing in the Global Income Builder Fund, please see the More Information about the Funds’ Investments section.

Investment Results

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.

Calendar Year Total Returns Class A

Best Quarter*		Worst Quarter*
Third Quarter 2013	5.09%	Third Quarter 2015	-6.08%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

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 or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Average Annual Returns - Multi-class Prospectus - First Eagle Global Income Builder Fund	1 Year	5 Years	Since Inception	Inception Date
Class A	7.31%	5.50%	6.01%	May 01, 2012
Class C	11.16%	5.80%	6.18%	May 01, 2012
Class I	13.28%	6.86%	7.24%	May 01, 2012
Class R6			9.11%	Mar. 01, 2017
After Taxes on Distributions | Class A	6.35%	4.30%	4.85%
After Taxes on Distributions and Sales of Fund Shares | Class A	4.34%	3.84%	4.28%
60% MSCI World Index/40% Bloomberg Barclays U.S. Aggregate Bond Index	14.52%	7.86%	7.69%	May 01, 2012
60% MSCI World Index/40% Bloomberg Barclays U.S. Aggregate Bond Index (R6 Comparison)	14.52%	7.86%	10.29%	Mar. 01, 2017
MSCI World Index	22.40%	11.64%	11.07%	May 01, 2012
MSCI World Index (R6 Comparison)	22.40%	11.64%	15.17%	Mar. 01, 2017
Bloomberg Barclays U.S. Aggregate Bond Index	3.54%	2.10%	2.36%	May 01, 2012
Bloomberg Barclays U.S. Aggregate Bond Index (R6 Comparison)	3.54%	2.10%	3.23%	Mar. 01, 2017

[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.

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 and estimated expenses in the case of newly organized share classes.

XML

Label

Element

Value

Multi-class Prospectus | 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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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 23.18% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

23.18%

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, 2017 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 (generally market price).

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.

• 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.

• 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).

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.

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.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Third Quarter 2013	5.09%	Third Quarter 2015	-6.08%

* For the period presented in the bar chart above.

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 or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Multi-class Prospectus | 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

14.52%

5 Years

rr_AverageAnnualReturnYear05

7.86%

Since Inception

rr_AverageAnnualReturnSinceInception

7.69%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 01, 2012

Multi-class Prospectus | First Eagle Global Income Builder Fund | 60% MSCI World Index/40% Bloomberg Barclays U.S. Aggregate Bond Index (R6 Comparison)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

14.52%

5 Years

rr_AverageAnnualReturnYear05

7.86%

Since Inception

rr_AverageAnnualReturnSinceInception

10.29%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

Multi-class Prospectus | First Eagle Global Income Builder Fund | MSCI World Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

22.40%

5 Years

rr_AverageAnnualReturnYear05

11.64%

Since Inception

rr_AverageAnnualReturnSinceInception

11.07%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 01, 2012

Multi-class Prospectus | First Eagle Global Income Builder Fund | MSCI World Index (R6 Comparison)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

22.40%

5 Years

rr_AverageAnnualReturnYear05

11.64%

Since Inception

rr_AverageAnnualReturnSinceInception

15.17%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

Multi-class Prospectus | First Eagle Global Income Builder Fund | Bloomberg Barclays U.S. Aggregate Bond Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.54%

5 Years

rr_AverageAnnualReturnYear05

2.10%

Since Inception

rr_AverageAnnualReturnSinceInception

2.36%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 01, 2012

Multi-class Prospectus | First Eagle Global Income Builder Fund | Bloomberg Barclays U.S. Aggregate Bond Index (R6 Comparison)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.54%

5 Years

rr_AverageAnnualReturnYear05

2.10%

Since Inception

rr_AverageAnnualReturnSinceInception

3.23%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

Multi-class Prospectus | 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

0.19%

^[2]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

1.19%

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

$ 615

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

859

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,122

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,871

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

615

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

859

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,122

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,871

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%

Annual Return 2017

rr_AnnualReturn2017

12.96%

1 Year

rr_AverageAnnualReturnYear01

7.31%

5 Years

rr_AverageAnnualReturnYear05

5.50%

Since Inception

rr_AverageAnnualReturnSinceInception

6.01%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 01, 2012

Multi-class Prospectus | First Eagle Global Income Builder Fund | Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.35%

5 Years

rr_AverageAnnualReturnYear05

4.30%

Since Inception

rr_AverageAnnualReturnSinceInception

4.85%

Multi-class Prospectus | First Eagle Global Income Builder Fund | Class A | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.34%

5 Years

rr_AverageAnnualReturnYear05

3.84%

Since Inception

rr_AverageAnnualReturnSinceInception

4.28%

Multi-class Prospectus | 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

11.16%

5 Years

rr_AverageAnnualReturnYear05

5.80%

Since Inception

rr_AverageAnnualReturnSinceInception

6.18%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 01, 2012

Multi-class Prospectus | 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

0.18%

^[2]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

0.93%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 95

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

296

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

515

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,143

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

95

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

296

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

515

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,143

1 Year

rr_AverageAnnualReturnYear01

13.28%

5 Years

rr_AverageAnnualReturnYear05

6.86%

Since Inception

rr_AverageAnnualReturnSinceInception

7.24%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 01, 2012

Multi-class Prospectus | 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

0.24%

^[2]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

1.34%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 136

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

425

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

734

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,613

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

136

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

425

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

734

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,613

Multi-class Prospectus | 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

0.24%

^[2]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

1.09%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 111

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

347

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

601

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,329

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

111

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

347

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

601

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,329

Multi-class Prospectus | 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

0.24%

^[2]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

0.99%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 101

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

315

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

547

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,213

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

101

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

315

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

547

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,213

Multi-class Prospectus | 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

0.14%

^[2]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

0.89%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 91

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

284

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

493

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,096

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

91

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

284

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

493

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,096

Since Inception

rr_AverageAnnualReturnSinceInception

9.11%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

[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, 2017 and estimated expenses in the case of newly organized share classes.

XML

Multi-class Prospectus | First Eagle High Yield Fund

First Eagle High Yield Fund

Investment Objective

First Eagle High Yield Fund (“High Yield Fund”) seeks to provide investors with a high level of current income.

Fees and Expenses of the High Yield Fund

The following information describes the fees and expenses you may pay if you buy and hold shares of the High Yield 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 $100,000 in the High Yield 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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - Multi-class Prospectus - First Eagle High Yield Fund	Class A		Class C	Class I	Class R3	Class R4	Class R5	Class R6
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	4.50%		none	none	none	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	1.00%	[1]	1.00%	none	none	none	none	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Multi-class Prospectus - First Eagle High Yield Fund		Class A	Class C	Class I	Class R3	Class R4	Class R5	Class R6
Management Fees	[1]	0.70%	0.70%	0.70%	0.70%	0.70%	0.70%	0.70%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	none	0.35%	0.10%	none	none
Other Expenses	[2]	0.26%	0.25%	0.21%	0.27%	0.27%	0.27%	0.22%
Total Annual Fund Operating Expenses (%)		1.21%	1.95%	0.91%	1.32%	1.07%	0.97%	0.92%
Fee Waiver	[1]	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)	(0.05%)
Total Annual Fund Operating Expenses After Fee Waiver (%)		1.16%	1.90%	0.86%	1.27%	1.02%	0.92%	0.87%

Example

The following example is intended to help you compare the cost of investing in the High Yield 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 (except that the management fee waiver is taken into account only for the one-year expense example). Please keep in mind your actual costs may be higher or lower.

Sold

Expense Example - Multi-class Prospectus - First Eagle High Yield Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	612	860	1,127	1,888
Class C	293	607	1,048	2,271
Class I	88	285	499	1,115
Class R3	129	413	719	1,586
Class R4	104	335	585	1,301
Class R5	94	304	531	1,185
Class R6	89	288	504	1,127

Held

Expense Example No Redemption - Multi-class Prospectus - First Eagle High Yield Fund - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	612	860	1,127	1,888
Class C	193	607	1,048	2,271
Class I	88	285	499	1,115
Class R3	129	413	719	1,586
Class R4	104	335	585	1,301
Class R5	94	304	531	1,185
Class R6	89	288	504	1,127

Portfolio Turnover Rate

There are transaction costs due to the bid/ask spread in the case of bonds or commissions in the case of stocks. The High Yield Fund pays transaction costs, such as commissions, 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 25.77% of the average value of its portfolio.

Principal Investment Strategies

To pursue its investment objective, the High Yield Fund normally invests at least 80% of its net assets (plus any borrowings for investment purposes) in high yield, below investment-grade securities (commonly referred to as “junk bonds”) and instruments. Such high yield instruments may include corporate bonds and loans, municipal bonds, and mortgage-backed and asset-backed securities. The Fund may invest in, and count for the purposes of this 80% allotment, unrated securities or other instruments deemed by the Fund’s Adviser to be below investment grade. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation and, in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The Fund may invest its assets in the securities of both U.S. and foreign issuers. 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.

The Fund may invest in securities with any investment rating or time to maturity, as well as unrated securities. An investment in the Fund is not intended to be a complete investment program.

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in the High Yield 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:

• 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.

• High Yield Risk — The Fund will invest at least 80% of its net assets (plus any borrowings for investment purposes) under normal market conditions 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 securities 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.

• 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 may 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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. The Fund may use derivatives in seeking 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.

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.

For more information on the risks of investing in the High Yield Fund, please see the More Information about the Funds’ Investments section.

Investment Results

The High Yield Fund commenced operations in its present form on or about December 30, 2011 and is the successor to the Old Mutual High Yield Fund (the “Predecessor Fund”) pursuant to a reorganization on or about that same date. The Predecessor Fund had similar investment objectives and strategies as the Fund, but was managed by another investment adviser.

The following information provides an indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1 and 5 years and since inception 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/high-yield-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.

Calendar Year Total Returns—Class I

Best Quarter*		Worst Quarter*
Second Quarter 2009	24.95%	Fourth Quarter 2008	-10.60%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

The following average annual total returns table discloses after-tax returns only for Class I shares. After-tax returns for Class A, Class C, Class R3, Class R4, Class R5 and Class R6 shares will vary. Returns shown for Class I shares assume commencement of operations on November 19, 2007, which is the date of organization of the Predecessor Fund. Returns shown for Class A and Class C assume commencement of operations on January 3, 2012, which is the date of inception for these share classes. Returns shown for Class I shares include the returns of the Predecessor Fund for periods prior to January 1, 2012. While no or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Average Annual Returns - Multi-class Prospectus - First Eagle High Yield Fund	1 Year	5 Years	10 Years	Since Inception	Inception Date
Class A	(0.20%)	2.79%		4.50%	Jan. 03, 2012
Class C	2.80%	2.96%		4.50%	Jan. 03, 2012
Class I	4.86%	4.03%	8.60%
Class R6				3.23%	Mar. 01, 2017
After Taxes on Distributions | Class I	2.43%	1.33%	4.97%
After Taxes on Distributions and Sales of Fund Shares | Class I	2.73%	1.82%	5.17%
Bloomberg Barclays U.S. Corporate High Yield Index (A Comparison)	7.50%	5.78%	8.03%	7.28%	Jan. 03, 2012
Bloomberg Barclays U.S. Corporate High Yield Index (C Comparison)	7.50%	5.78%	8.03%	7.28%	Jan. 03, 2012
Bloomberg Barclays U.S. Corporate High Yield Index (R6 Comparison)	7.50%	5.78%	8.03%	4.20%	Mar. 01, 2017

[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.

[1] The Adviser has contractually agreed to waive its management fee at an annual rate in the amount of 0.05% of the average daily value of the Fund's net assets for the period through February 28, 2019. This waiver has the effect of reducing the management fee shown in the table for the term of the waiver from 0.70% to 0.65%.

[2] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 and estimated expenses in the case of newly organized share classes.

XML

Label

Element

Value

Multi-class Prospectus | First Eagle High Yield Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle High Yield Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle High Yield Fund (“High Yield Fund”) seeks to provide investors with a high level of current income.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the High Yield 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 High Yield 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 $100,000 in the High Yield 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 75 and 81, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

Feb. 28, 2019

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 High Yield Fund pays transaction costs, such as commissions, 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 25.77% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

25.77%

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 $100,000 in the High Yield Fund.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 100,000

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, 2017 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 High Yield 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 (except that the management fee waiver is taken into account only for the one-year expense example). 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 pursue its investment objective, the High Yield Fund normally invests at least 80% of its net assets (plus any borrowings for investment purposes) in high yield, below investment-grade securities (commonly referred to as “junk bonds”) and instruments. Such high yield instruments may include corporate bonds and loans, municipal bonds, and mortgage-backed and asset-backed securities. The Fund may invest in, and count for the purposes of this 80% allotment, unrated securities or other instruments deemed by the Fund’s Adviser to be below investment grade. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation and, in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The Fund may invest its assets in the securities of both U.S. and foreign issuers. 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.

The Fund may invest in securities with any investment rating or time to maturity, as well as unrated securities. An investment in the Fund is not intended to be a complete investment program.

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 High Yield 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:

• 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.

• High Yield Risk — The Fund will invest at least 80% of its net assets (plus any borrowings for investment purposes) under normal market conditions 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 securities 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.

• 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 may 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.

• 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.

• 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.

• 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.

• 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.

• 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.

• 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. The Fund may use derivatives in seeking 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.

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.

For more information on the risks of investing in the High Yield 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 High Yield Fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Investment Results

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The High Yield Fund commenced operations in its present form on or about December 30, 2011 and is the successor to the Old Mutual High Yield Fund (the “Predecessor Fund”) pursuant to a reorganization on or about that same date. The Predecessor Fund had similar investment objectives and strategies as the Fund, but was managed by another investment adviser.

The following information provides an indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1 and 5 years and since inception 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/high-yield-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 Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1 and 5 years and since inception 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/high-yield-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 I

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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Second Quarter 2009	24.95%	Fourth Quarter 2008	-10.60%

* For the period presented in the bar chart above.

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

24.95%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(10.60%)

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 average annual total returns table discloses after-tax returns only for Class I shares. After-tax returns for Class A, Class C, Class R3, Class R4, Class R5 and Class R6 shares will vary.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

The following average annual total returns table discloses after-tax returns only for Class I shares. After-tax returns for Class A, Class C, Class R3, Class R4, Class R5 and Class R6 shares will vary. Returns shown for Class I shares assume commencement of operations on November 19, 2007, which is the date of organization of the Predecessor Fund. Returns shown for Class A and Class C assume commencement of operations on January 3, 2012, which is the date of inception for these share classes. Returns shown for Class I shares include the returns of the Predecessor Fund for periods prior to January 1, 2012. While no or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Multi-class Prospectus | First Eagle High Yield Fund | Bloomberg Barclays U.S. Corporate High Yield Index (A Comparison)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.50%

5 Years

rr_AverageAnnualReturnYear05

5.78%

10 Years

rr_AverageAnnualReturnYear10

8.03%

Since Inception

rr_AverageAnnualReturnSinceInception

7.28%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 03, 2012

Multi-class Prospectus | First Eagle High Yield Fund | Bloomberg Barclays U.S. Corporate High Yield Index (C Comparison)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.50%

5 Years

rr_AverageAnnualReturnYear05

5.78%

10 Years

rr_AverageAnnualReturnYear10

8.03%

Since Inception

rr_AverageAnnualReturnSinceInception

7.28%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 03, 2012

Multi-class Prospectus | First Eagle High Yield Fund | Bloomberg Barclays U.S. Corporate High Yield Index (R6 Comparison)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.50%

5 Years

rr_AverageAnnualReturnYear05

5.78%

10 Years

rr_AverageAnnualReturnYear10

8.03%

Since Inception

rr_AverageAnnualReturnSinceInception

4.20%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

Multi-class Prospectus | First Eagle High Yield Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.50%

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

0.70%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.26%

^[3]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

1.21%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Fund Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

1.16%

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

$ 612

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

860

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,127

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,888

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

612

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

860

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,127

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,888

1 Year

rr_AverageAnnualReturnYear01

(0.20%)

5 Years

rr_AverageAnnualReturnYear05

2.79%

Since Inception

rr_AverageAnnualReturnSinceInception

4.50%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 03, 2012

Multi-class Prospectus | First Eagle High Yield 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

0.70%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.25%

^[3]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

1.95%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Fund Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

1.90%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 293

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

607

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,048

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,271

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

193

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

607

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,048

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,271

1 Year

rr_AverageAnnualReturnYear01

2.80%

5 Years

rr_AverageAnnualReturnYear05

2.96%

Since Inception

rr_AverageAnnualReturnSinceInception

4.50%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 03, 2012

Multi-class Prospectus | First Eagle High Yield 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

0.70%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.21%

^[3]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

0.91%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Fund Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

0.86%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 88

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

285

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

499

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,115

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

88

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

285

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

499

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,115

Annual Return 2008

rr_AnnualReturn2008

(15.70%)

Annual Return 2009

rr_AnnualReturn2009

60.00%

Annual Return 2010

rr_AnnualReturn2010

15.76%

Annual Return 2011

rr_AnnualReturn2011

4.08%

Annual Return 2012

rr_AnnualReturn2012

15.19%

Annual Return 2013

rr_AnnualReturn2013

6.92%

Annual Return 2014

rr_AnnualReturn2014

(0.24%)

Annual Return 2015

rr_AnnualReturn2015

(7.04%)

Annual Return 2016

rr_AnnualReturn2016

17.19%

Annual Return 2017

rr_AnnualReturn2017

4.86%

1 Year

rr_AverageAnnualReturnYear01

4.86%

5 Years

rr_AverageAnnualReturnYear05

4.03%

10 Years

rr_AverageAnnualReturnYear10

8.60%

Multi-class Prospectus | First Eagle High Yield Fund | Class I | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.43%

5 Years

rr_AverageAnnualReturnYear05

1.33%

10 Years

rr_AverageAnnualReturnYear10

4.97%

Multi-class Prospectus | First Eagle High Yield Fund | Class I | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.73%

5 Years

rr_AverageAnnualReturnYear05

1.82%

10 Years

rr_AverageAnnualReturnYear10

5.17%

Multi-class Prospectus | First Eagle High Yield 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

0.70%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.35%

Other Expenses

rr_OtherExpensesOverAssets

0.27%

^[3]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

1.32%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Fund Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

1.27%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 129

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

413

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

719

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,586

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

129

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

413

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

719

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,586

Multi-class Prospectus | First Eagle High Yield 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

0.70%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.10%

Other Expenses

rr_OtherExpensesOverAssets

0.27%

^[3]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

1.07%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Fund Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

1.02%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 104

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

335

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

585

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,301

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

104

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

335

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

585

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,301

Multi-class Prospectus | First Eagle High Yield 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

0.70%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.27%

^[3]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

0.97%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Fund Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

0.92%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 94

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

304

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

531

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,185

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

94

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

304

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

531

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,185

Multi-class Prospectus | First Eagle High Yield 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

0.70%

^[2]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.22%

^[3]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

0.92%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[2]

Total Annual Fund Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

0.87%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 89

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

288

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

504

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,127

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

89

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

288

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

504

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,127

Since Inception

rr_AverageAnnualReturnSinceInception

3.23%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

[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] The Adviser has contractually agreed to waive its management fee at an annual rate in the amount of 0.05% of the average daily value of the Fund's net assets for the period through February 28, 2019. This waiver has the effect of reducing the management fee shown in the table for the term of the waiver from 0.70% to 0.65%.

[3] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 and estimated expenses in the case of newly organized share classes.

XML

Multi-class Prospectus | First Eagle Fund of America

First Eagle Fund of America

Investment Objective

First Eagle Fund of America (“Fund of America”) seeks capital appreciation by investing primarily in domestic stocks and, to a lesser extent, in debt and foreign equity securities.

Fees and Expenses of the Fund of America

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

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 Fund of America. 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 75 and 81, respectively, and in the appendix to the Fund’s Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees - Multi-class Prospectus - First Eagle Fund of America	Class A		Class C	Class Y	[1]	Class I	Class R3	Class R4	Class R5	Class R6
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	5.00%		none	none		none	none	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	1.00%	[2]	1.00%	none		none	none	none	none	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Multi-class Prospectus - First Eagle Fund of America		Class A	Class C	Class Y	[2]	Class I	Class R3	Class R4	Class R5	Class R6
Management Fees	[1]	0.90%	0.90%	0.90%		0.90%	0.90%	0.90%	0.90%	0.90%
Distribution and Service (12b-1) Fees		0.25%	1.00%	0.25%		none	0.35%	0.10%	none	none
Other Expenses	[3]	0.16%	0.16%	0.16%		0.11%	0.22%	0.22%	0.22%	0.10%
Total Annual Operating Expenses (%)		1.31%	2.06%	1.31%		1.01%	1.47%	1.22%	1.12%	1.00%

Example

The following example is intended to help you compare the cost of investing in Fund of America 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.

Sold

Expense Example - Multi-class Prospectus - First Eagle Fund of America - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	627	894	1,182	2,000
Class C	309	646	1,108	2,390
Class Y	133	415	718	1,579
Class I	103	322	558	1,236
Class R3	150	465	803	1,757
Class R4	124	387	670	1,477
Class R5	114	356	617	1,363
Class R6	102	318	552	1,225

Held

Expense Example No Redemption - Multi-class Prospectus - First Eagle Fund of America - USD ($)	1 Year	3 Years	5 Years	10 Years
Class A	627	894	1,182	2,000
Class C	209	646	1,108	2,390
Class Y	133	415	718	1,579
Class I	103	322	558	1,236
Class R3	150	465	803	1,757
Class R4	124	387	670	1,477
Class R5	114	356	617	1,363
Class R6	102	318	552	1,225

Portfolio Turnover Rate

Fund of America 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 of America operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, Fund of America’s portfolio turnover rate was 57.02% of the average value of its portfolio.

Principal Investment Strategies

To achieve its objective of capital appreciation, Fund of America will primarily invest in domestic stocks and, to a lesser extent, debt and foreign equity instruments. Normally, at least 80% of the Fund’s net assets (plus any borrowings for investment purposes) are invested in domestic equity and debt instruments. Equity securities include common stocks, preferred stocks, convertible securities and warrants. The Fund may also invest in repurchase agreements and derivatives.

Derivatives include investing in options, futures and swaps and related products. Specifically, the Fund may enter into interest rate, credit default, currency, equity, fixed income and index swaps and the purchase or sale of related caps, floors and collars.

In addition, the Fund may enter into options on securities and on stock indices to limit the Fund’s investment risk and augment its investment return. Further, the Fund may write “covered” call options on equity or debt securities and on stock indices in seeking to enhance investment return or to hedge against declines in the prices of portfolio securities or may write put options to hedge against increases in the prices of securities which it intends to purchase. The Fund also may write call options on broadly based stock and bond market indices if at the time of writing it holds a portfolio of stocks or bonds listed on such index. Finally, the Fund may utilize futures contracts and options on futures on securities exchanges or in the over-the-counter market.

The Fund may enter into certain types of repurchase agreements, primarily as a cash management strategy.

Normally, at least 80% of the Fund’s net assets (plus any borrowings for investment purposes) will be invested in domestic equity and debt instruments. The Fund “counts” derivative positions on these instruments for purposes of this 80% allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The investment philosophy and strategy of Fund of America can be broadly characterized as a bottom-up, event-driven approach to choose securities that the Fund believes are undervalued and should perform well. In a bottom-up approach, companies and securities are researched and chosen individually. In an event-driven approach, one looks for companies that appear to be undervalued in relation to their potential value in light of positive corporate changes. Signals of corporate change can be management changes, large share repurchases, potential acquisitions or mergers. If changes are successful, these companies should realize a rise in the stock price. Fund of America invests in the securities of companies that it believes are undervalued relative to their overall financial and managerial strength. 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 invest in debt securities generally without regard to their credit rating or time to maturity. However, the Fund has no current intention of investing more than 5% of its net assets in high yield bonds.

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in Fund of America. 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 Fund of America, 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 Fund of America invests, as well as economic, political, or social events in the United States or abroad.

• Event-Driven Style Risk — The event-driven investment style carries the additional risk that the event anticipated occurs later than expected, does not occur at all, or does not have the desired effect on the market price of the securities.

• Diversification Risk — The Fund is a non-diversified mutual fund, and as a result, an investment in Fund of America may expose your money to greater risks than if you invest in a diversified fund. Fund of America will invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

• 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, e.g., 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. 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.

• 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.

• Repurchase Agreements Risk — The Fund may enter into certain types of repurchase agreements, primarily as a cash management strategy. If the seller fails to repurchase the security and the market value declines, the Fund may lose money.

• Options Risk — The Fund may engage in various options transactions in which the Fund seeks to limit investment risk or increase investment returns by purchasing the right to buy or sell, or by selling the obligation to buy or sell, a security at a set price in the future. The Fund pays a premium when buying options and receives a premium when selling options. When trading options, the Fund may incur losses or forego otherwise realizable gains if market prices do not move as expected.

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

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.

For more information on the risks of investing in Fund of America, please see the More Information about the Funds’ Investments section.

Investment Results

The following information provides an indication of the risks of investing in Fund of America by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/fund-america 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.

Calendar Year Total Returns—Class Y

Best Quarter*		Worst Quarter*
Second Quarter 2009	13.03%	Fourth Quarter 2008	-20.71%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

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

After-tax returns for Class C, Class A, Class I, Class R3, Class R4, Class R5 and Class R6 shares will vary. While no or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Average Annual Returns - Multi-class Prospectus - First Eagle Fund of America	1 Year	5 Years	10 Years	Since Inception	Inception Date
Class Y	21.77%	10.73%	7.78%
Class C	19.83%	9.90%	6.98%
Class A	15.68%	9.60%	7.24%
Class I	22.14%			9.77%	Mar. 08, 2013
Class R6				12.98%	Mar. 01, 2017
After Taxes on Distributions | Class Y	19.14%	9.31%	6.82%
After Taxes on Distributions and Sales of Fund Shares | Class Y	14.44%	8.39%	6.18%
Standard & Poor’s 500 Index (I Comparison)	21.83%	15.79%	8.50%	14.28%	Mar. 08, 2013
Standard & Poor’s 500 Index (R6 Comparison)	21.83%	15.79%	8.50%	13.43%	Mar. 01, 2017

[1] Closed to new investors.

[2] 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.

[1] 0.90% of the first $2.25 billion of the Fund's average daily net assets, 0.85% of the next $2.75 billion of average daily net assets, and 0.80% of average daily net assets in excess of $5 billion.

[2] Closed to new investors.

[3] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 and estimated expenses in the case of newly organized share classes.

XML

Label

Element

Value

Multi-class Prospectus | First Eagle Fund of America

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle Fund of America

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle Fund of America (“Fund of America”) seeks capital appreciation by investing primarily in domestic stocks and, to a lesser extent, in debt and foreign equity securities.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund of America

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

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 Fund of America. 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 75 and 81, respectively, and in the appendix to the Fund’s Prospectus titled Intermediary-Specific Front-End 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

Fund of America 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 of America operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, Fund of America’s portfolio turnover rate was 57.02% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

57.02%

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 Fund of America.

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, 2017 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 Fund of America 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 capital appreciation, Fund of America will primarily invest in domestic stocks and, to a lesser extent, debt and foreign equity instruments. Normally, at least 80% of the Fund’s net assets (plus any borrowings for investment purposes) are invested in domestic equity and debt instruments. Equity securities include common stocks, preferred stocks, convertible securities and warrants. The Fund may also invest in repurchase agreements and derivatives.

Derivatives include investing in options, futures and swaps and related products. Specifically, the Fund may enter into interest rate, credit default, currency, equity, fixed income and index swaps and the purchase or sale of related caps, floors and collars.

In addition, the Fund may enter into options on securities and on stock indices to limit the Fund’s investment risk and augment its investment return. Further, the Fund may write “covered” call options on equity or debt securities and on stock indices in seeking to enhance investment return or to hedge against declines in the prices of portfolio securities or may write put options to hedge against increases in the prices of securities which it intends to purchase. The Fund also may write call options on broadly based stock and bond market indices if at the time of writing it holds a portfolio of stocks or bonds listed on such index. Finally, the Fund may utilize futures contracts and options on futures on securities exchanges or in the over-the-counter market.

The Fund may enter into certain types of repurchase agreements, primarily as a cash management strategy.

Normally, at least 80% of the Fund’s net assets (plus any borrowings for investment purposes) will be invested in domestic equity and debt instruments. The Fund “counts” derivative positions on these instruments for purposes of this 80% allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The investment philosophy and strategy of Fund of America can be broadly characterized as a bottom-up, event-driven approach to choose securities that the Fund believes are undervalued and should perform well. In a bottom-up approach, companies and securities are researched and chosen individually. In an event-driven approach, one looks for companies that appear to be undervalued in relation to their potential value in light of positive corporate changes. Signals of corporate change can be management changes, large share repurchases, potential acquisitions or mergers. If changes are successful, these companies should realize a rise in the stock price. Fund of America invests in the securities of companies that it believes are undervalued relative to their overall financial and managerial strength. 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 invest in debt securities generally without regard to their credit rating or time to maturity. However, the Fund has no current intention of investing more than 5% of its net assets in high yield bonds.

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 Fund of America. 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 Fund of America, 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 Fund of America invests, as well as economic, political, or social events in the United States or abroad.

• Event-Driven Style Risk — The event-driven investment style carries the additional risk that the event anticipated occurs later than expected, does not occur at all, or does not have the desired effect on the market price of the securities.

• Diversification Risk — The Fund is a non-diversified mutual fund, and as a result, an investment in Fund of America may expose your money to greater risks than if you invest in a diversified fund. Fund of America will invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

• 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, e.g., 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. 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.

• 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.

• Repurchase Agreements Risk — The Fund may enter into certain types of repurchase agreements, primarily as a cash management strategy. If the seller fails to repurchase the security and the market value declines, the Fund may lose money.

• Options Risk — The Fund may engage in various options transactions in which the Fund seeks to limit investment risk or increase investment returns by purchasing the right to buy or sell, or by selling the obligation to buy or sell, a security at a set price in the future. The Fund pays a premium when buying options and receives a premium when selling options. When trading options, the Fund may incur losses or forego otherwise realizable gains if market prices do not move as expected.

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

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.

For more information on the risks of investing in Fund of America, 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 Fund of America.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Fund is a non-diversified mutual fund, and as a result, an investment in Fund of America may expose your money to greater risks than if you invest in a diversified fund. Fund of America will invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 Fund of America by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/fund-america 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 Fund of America by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/fund-america

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 Y

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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Second Quarter 2009	13.03%	Fourth Quarter 2008	-20.71%

* For the period presented in the bar chart above.

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

13.03%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(20.71%)

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 Y shares. After-tax returns for Class C, Class A, 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 Y shares.

After-tax returns for Class C, Class A, Class I, Class R3, Class R4, Class R5 and Class R6 shares will vary. While no or only partial year information is shown for Class R3, Class R4, Class R5 and Class R6 shares (because they have no or less than a full year’s performance as of December 31, 2017), 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 differ only to the extent that Class R3, Class R4, Class R5 and Class R6 shares do not have the same expenses as the classes for which performance is shown. Comparative expense information is in the Fees and Expenses table.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Multi-class Prospectus | First Eagle Fund of America | Standard & Poor’s 500 Index (I Comparison)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

21.83%

5 Years

rr_AverageAnnualReturnYear05

15.79%

10 Years

rr_AverageAnnualReturnYear10

8.50%

Since Inception

rr_AverageAnnualReturnSinceInception

14.28%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 08, 2013

Multi-class Prospectus | First Eagle Fund of America | Standard & Poor’s 500 Index (R6 Comparison)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

21.83%

5 Years

rr_AverageAnnualReturnYear05

15.79%

10 Years

rr_AverageAnnualReturnYear10

8.50%

Since Inception

rr_AverageAnnualReturnSinceInception

13.43%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

Multi-class Prospectus | First Eagle Fund of America | 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

0.90%

^[2]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.16%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.31%

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

$ 627

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

894

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,182

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,000

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

627

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

894

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,182

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,000

1 Year

rr_AverageAnnualReturnYear01

15.68%

5 Years

rr_AverageAnnualReturnYear05

9.60%

10 Years

rr_AverageAnnualReturnYear10

7.24%

Multi-class Prospectus | First Eagle Fund of America | 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

0.90%

^[2]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.16%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

2.06%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 309

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

646

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,108

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,390

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

209

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

646

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,108

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,390

1 Year

rr_AverageAnnualReturnYear01

19.83%

5 Years

rr_AverageAnnualReturnYear05

9.90%

10 Years

rr_AverageAnnualReturnYear10

6.98%

Multi-class Prospectus | First Eagle Fund of America | Class Y

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

^[4]

Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

^[4]

Management Fees

rr_ManagementFeesOverAssets

0.90%

^[2],[4]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

^[4]

Other Expenses

rr_OtherExpensesOverAssets

0.16%

^[3],[4]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.31%

^[4]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 133

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

415

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

718

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,579

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

133

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

415

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

718

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,579

Annual Return 2008

rr_AnnualReturn2008

(30.74%)

Annual Return 2009

rr_AnnualReturn2009

26.13%

Annual Return 2010

rr_AnnualReturn2010

21.33%

Annual Return 2011

rr_AnnualReturn2011

(1.01%)

Annual Return 2012

rr_AnnualReturn2012

21.16%

Annual Return 2013

rr_AnnualReturn2013

31.04%

Annual Return 2014

rr_AnnualReturn2014

10.32%

Annual Return 2015

rr_AnnualReturn2015

(3.54%)

Annual Return 2016

rr_AnnualReturn2016

(1.97%)

Annual Return 2017

rr_AnnualReturn2017

21.77%

1 Year

rr_AverageAnnualReturnYear01

21.77%

5 Years

rr_AverageAnnualReturnYear05

10.73%

10 Years

rr_AverageAnnualReturnYear10

7.78%

Multi-class Prospectus | First Eagle Fund of America | Class Y | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

19.14%

5 Years

rr_AverageAnnualReturnYear05

9.31%

10 Years

rr_AverageAnnualReturnYear10

6.82%

Multi-class Prospectus | First Eagle Fund of America | Class Y | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

14.44%

5 Years

rr_AverageAnnualReturnYear05

8.39%

10 Years

rr_AverageAnnualReturnYear10

6.18%

Multi-class Prospectus | First Eagle Fund of America | 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

0.90%

^[2]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.11%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.01%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 103

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

322

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

558

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,236

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

103

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

322

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

558

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,236

1 Year

rr_AverageAnnualReturnYear01

22.14%

Since Inception

rr_AverageAnnualReturnSinceInception

9.77%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 08, 2013

Multi-class Prospectus | First Eagle Fund of America | 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

0.90%

^[2]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.35%

Other Expenses

rr_OtherExpensesOverAssets

0.22%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.47%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 150

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

465

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

803

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,757

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

150

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

465

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

803

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,757

Multi-class Prospectus | First Eagle Fund of America | 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

0.90%

^[2]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.10%

Other Expenses

rr_OtherExpensesOverAssets

0.22%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.22%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 124

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

387

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

670

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,477

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

124

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

387

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

670

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,477

Multi-class Prospectus | First Eagle Fund of America | 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

0.90%

^[2]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.22%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.12%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 114

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

356

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

617

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,363

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

114

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

356

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

617

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,363

Multi-class Prospectus | First Eagle Fund of America | 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

0.90%

^[2]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.10%

^[3]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.00%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 102

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

318

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

552

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,225

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

102

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

318

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

552

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,225

Since Inception

rr_AverageAnnualReturnSinceInception

12.98%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 01, 2017

[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] 0.90% of the first $2.25 billion of the Fund's average daily net assets, 0.85% of the next $2.75 billion of average daily net assets, and 0.80% of average daily net assets in excess of $5 billion.

[3] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 and estimated expenses in the case of newly organized share classes.

[4] Closed to new investors.

XML

Class T Prospectus | First Eagle Global Fund

First Eagle Global Fund

Investment Objective

First Eagle Global Fund (“Global 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.

Fees and Expenses of the Global Fund

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

You may qualify for sales charge discounts if you invest at least $250,000 in the Global Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	Class T Prospectus First Eagle Global Fund Class T
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	2.50%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class T Prospectus First Eagle Global Fund Class T
Management Fees	0.75%
Distribution and/or Service (12b-1) Fees	0.25%
Other Expenses	0.11%	[1]
Total Annual Operating Expenses (%)	1.11%

Example

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.

Sold

Expense Example	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle Global Fund | Class T | USD ($)	360	594	846	1,568

Held

Expense Example No Redemption	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle Global Fund | Class T | USD ($)	360	594	846	1,568

Portfolio Turnover Rate

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, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 9.67% of the average value of its portfolio.

Principal Investment Strategies

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 fixed-income instruments (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. 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).

The investment philosophy and strategy of the Global 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). 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 contracts).

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in the Global 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 Global 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 may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations.

• 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.

• 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.

• 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, e.g., 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. 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.

• 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.

• 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.

• 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.

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.

For more information on the risks of investing in the Global Fund, please see the More Information about the Funds’ Investments section.

Investment Results

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 1, 5 and 10 years 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-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.

Calendar Year Total Returns—Class A

Best Quarter*		Worst Quarter*
Third Quarter 2009	14.58%	Fourth Quarter 2008	-10.66%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Average Annual Returns - Class T Prospectus - First Eagle Global Fund	1 Year	5 Years	10 Years
Class A	7.80%	7.04%	6.05%
After Taxes on Distributions | Class A	6.75%	6.03%	5.31%
After Taxes on Distributions and Sales of Fund Shares | Class A	5.27%	5.38%	4.81%
MSCI World Index	22.40%	11.64%	5.03%

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Label

Element

Value

Class T Prospectus | First Eagle Global Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle Global Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle Global Fund (“Global 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.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Global 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 Fund.

You may qualify for sales charge discounts if you invest at least $250,000 in the Global Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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

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, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 9.67% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

9.67%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you invest at least $250,000 in the Global Fund.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 250,000

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, 2017 as adjusted for estimates 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 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 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 fixed-income instruments (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. 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).

The investment philosophy and strategy of the Global 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). 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 contracts).

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 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 Global 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 may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations.

• 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.

• 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.

• 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, e.g., 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. 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.

• 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.

• 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.

• 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.

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.

For more information on the risks of investing in the Global 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 Fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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-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 Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years compare with those of a broad measure of market performance.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800.334.2143

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.feim.com/individual-investors/fund/global-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.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Third Quarter 2009	14.58%	Fourth Quarter 2008	-10.66%

* For the period presented in the bar chart above.

Bar Chart, Returns for Class Not Offered in Prospectus [Text]

rr_BarChartReturnsForClassNotOfferedInProspectus

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

14.58%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(10.66%)

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 Narrative

rr_PerformanceTableNarrativeTextBlock

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Class T Prospectus | First Eagle Global Fund | MSCI World Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

22.40%

5 Years

rr_AverageAnnualReturnYear05

11.64%

10 Years

rr_AverageAnnualReturnYear10

5.03%

Class T Prospectus | First Eagle Global Fund | Class T

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

2.50%

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

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.11%

^[1]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.11%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 360

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

594

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

846

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,568

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

360

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

594

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

846

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,568

Class T Prospectus | First Eagle Global Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Annual Return 2008

rr_AnnualReturn2008

(21.06%)

Annual Return 2009

rr_AnnualReturn2009

22.91%

Annual Return 2010

rr_AnnualReturn2010

17.58%

Annual Return 2011

rr_AnnualReturn2011

(0.19%)

Annual Return 2012

rr_AnnualReturn2012

12.46%

Annual Return 2013

rr_AnnualReturn2013

15.49%

Annual Return 2014

rr_AnnualReturn2014

2.93%

Annual Return 2015

rr_AnnualReturn2015

(0.94%)

Annual Return 2016

rr_AnnualReturn2016

10.65%

Annual Return 2017

rr_AnnualReturn2017

13.49%

1 Year

rr_AverageAnnualReturnYear01

7.80%

5 Years

rr_AverageAnnualReturnYear05

7.04%

10 Years

rr_AverageAnnualReturnYear10

6.05%

Class T Prospectus | First Eagle Global Fund | Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.75%

5 Years

rr_AverageAnnualReturnYear05

6.03%

10 Years

rr_AverageAnnualReturnYear10

5.31%

Class T Prospectus | First Eagle Global Fund | Class A | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.27%

5 Years

rr_AverageAnnualReturnYear05

5.38%

10 Years

rr_AverageAnnualReturnYear10

4.81%

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Class T Prospectus | First Eagle Overseas Fund

First Eagle Overseas Fund

Investment Objective

First Eagle Overseas Fund (“Overseas Fund”) seeks long-term growth of capital by investing primarily in equities issued by non-U.S. corporations.

Fees and Expenses of the Overseas Fund

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

Subject to certain exceptions, the Overseas Fund is currently closed to new investors and new accounts. You may find the exceptions in the About Your Investment—Overseas Fund All Share Classes (closed to new investors) section on page 74 of this Prospectus. If you are eligible to purchase shares, you may qualify for sales charge discounts if you invest at least $250,000 in the Overseas Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	Class T Prospectus First Eagle Overseas Fund Class T
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	2.50%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class T Prospectus First Eagle Overseas Fund Class T
Management Fees	0.75%
Distribution and/or Service (12b-1) Fees	0.25%
Other Expenses	0.15%	[1]
Total Annual Operating Expenses (%)	1.15%

Example

The following example is intended to help you compare the cost of investing in the Overseas 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.

Sold

Expense Example	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle Overseas Fund | Class T | USD ($)	364	606	867	1,613

Held

Expense Example No Redemption	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle Overseas Fund | Class T | USD ($)	364	606	867	1,613

Portfolio Turnover Rate

The Overseas Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 8.45% of the average value of its portfolio.

Principal Investment Strategies

To achieve its objective of long-term capital growth, the Overseas Fund will invest primarily in equity securities of non-U.S. companies the majority of which are traded in mature markets (for example, Japan, Germany and France) and may invest in countries whose economies are still developing (sometimes called “emerging markets”). The Fund particularly seeks companies that have financial strength and stability, strong management and fundamental value. Normally, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in foreign securities and “counts” relevant derivative positions towards this “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price). The Fund also may invest up to 20% of its total assets in debt instruments. The Fund may invest in debt securities generally without regard to their credit rating or time to maturity. 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 invest in fixed-income instruments, short-term debt instruments, gold and other precious metals, and futures contracts related to precious metals.

The investment philosophy and strategy of the Overseas 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). 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 contracts).

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in the Overseas 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.

The principal risks of investing in the Overseas 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 may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations.

• Emerging Market Risk — When the Fund invests in emerging market securities (generally meaning those associated with less developed markets), the Fund may be exposed to market, credit, currency, liquidity, legal, political, technical and other risks different from, and generally greater than, the risks of investing in developed markets. Emerging market countries typically have less-established market economies than developed countries and may face greater social, economic, regulatory and political uncertainties. In addition, emerging markets typically present greater illiquidity and price volatility concerns due to smaller or limited local capital markets and greater difficulty in determining market valuations of securities due to limited public information on issuers.

• 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.

• 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, e.g., 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. 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.

• 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.

• 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.

• 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.

• 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.

• 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 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.

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.

For more information on the risks of investing in the Overseas Fund, please see the More Information about the Funds’ Investments section.

Investment Results

The following information provides an indication of the risks of investing in the Overseas Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/overseas-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.

Calendar Year Total Returns—Class A

Best Quarter*		Worst Quarter*
Second Quarter 2009	16.58%	Third Quarter 2008	-12.48%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Average Annual Returns - Class T Prospectus - First Eagle Overseas Fund	1 Year	5 Years	10 Years
Class A	8.34%	5.27%	4.69%
After Taxes on Distributions | Class A	7.49%	4.36%	3.85%
After Taxes on Distributions and Sales of Fund Shares | Class A	5.42%	4.03%	3.71%
MSCI EAFE Index	25.03%	7.90%	1.94%

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Label

Element

Value

Class T Prospectus | First Eagle Overseas Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle Overseas Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle Overseas Fund (“Overseas Fund”) seeks long-term growth of capital by investing primarily in equities issued by non-U.S. corporations.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Overseas 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 Overseas Fund.

Subject to certain exceptions, the Overseas Fund is currently closed to new investors and new accounts. You may find the exceptions in the About Your Investment—Overseas Fund All Share Classes (closed to new investors) section on page 74 of this Prospectus. If you are eligible to purchase shares, you may qualify for sales charge discounts if you invest at least $250,000 in the Overseas Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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

The Overseas Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 8.45% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

8.45%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

If you are eligible to purchase shares, you may qualify for sales charge discounts if you invest at least $250,000 in the Overseas Fund.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 250,000

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, 2017 as adjusted for estimates 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 Overseas 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 long-term capital growth, the Overseas Fund will invest primarily in equity securities of non-U.S. companies the majority of which are traded in mature markets (for example, Japan, Germany and France) and may invest in countries whose economies are still developing (sometimes called “emerging markets”). The Fund particularly seeks companies that have financial strength and stability, strong management and fundamental value. Normally, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in foreign securities and “counts” relevant derivative positions towards this “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price). The Fund also may invest up to 20% of its total assets in debt instruments. The Fund may invest in debt securities generally without regard to their credit rating or time to maturity. 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 invest in fixed-income instruments, short-term debt instruments, gold and other precious metals, and futures contracts related to precious metals.

The investment philosophy and strategy of the Overseas 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). 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 contracts).

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 Overseas 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.

The principal risks of investing in the Overseas 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 may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations.

• Emerging Market Risk — When the Fund invests in emerging market securities (generally meaning those associated with less developed markets), the Fund may be exposed to market, credit, currency, liquidity, legal, political, technical and other risks different from, and generally greater than, the risks of investing in developed markets. Emerging market countries typically have less-established market economies than developed countries and may face greater social, economic, regulatory and political uncertainties. In addition, emerging markets typically present greater illiquidity and price volatility concerns due to smaller or limited local capital markets and greater difficulty in determining market valuations of securities due to limited public information on issuers.

• 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.

• 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, e.g., 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. 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.

• 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.

• 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.

• 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.

• 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.

• 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 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.

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.

For more information on the risks of investing in the Overseas 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 Overseas Fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 Overseas Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/overseas-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 Overseas Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years compare with those of a broad measure of market performance.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800.334.2143

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.feim.com/individual-investors/fund/overseas-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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Second Quarter 2009	16.58%	Third Quarter 2008	-12.48%

* For the period presented in the bar chart above.

Bar Chart, Returns for Class Not Offered in Prospectus [Text]

rr_BarChartReturnsForClassNotOfferedInProspectus

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

16.58%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(12.48%)

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 Narrative

rr_PerformanceTableNarrativeTextBlock

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Class T Prospectus | First Eagle Overseas Fund | MSCI EAFE Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

25.03%

5 Years

rr_AverageAnnualReturnYear05

7.90%

10 Years

rr_AverageAnnualReturnYear10

1.94%

Class T Prospectus | First Eagle Overseas Fund | Class T

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

2.50%

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

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.15%

^[1]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.15%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 364

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

606

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

867

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,613

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

364

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

606

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

867

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,613

Class T Prospectus | First Eagle Overseas Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Annual Return 2008

rr_AnnualReturn2008

(20.97%)

Annual Return 2009

rr_AnnualReturn2009

20.64%

Annual Return 2010

rr_AnnualReturn2010

19.24%

Annual Return 2011

rr_AnnualReturn2011

(5.60%)

Annual Return 2012

rr_AnnualReturn2012

13.98%

Annual Return 2013

rr_AnnualReturn2013

11.57%

Annual Return 2014

rr_AnnualReturn2014

(0.97%)

Annual Return 2015

rr_AnnualReturn2015

2.27%

Annual Return 2016

rr_AnnualReturn2016

5.59%

Annual Return 2017

rr_AnnualReturn2017

14.05%

1 Year

rr_AverageAnnualReturnYear01

8.34%

5 Years

rr_AverageAnnualReturnYear05

5.27%

10 Years

rr_AverageAnnualReturnYear10

4.69%

Class T Prospectus | First Eagle Overseas Fund | Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.49%

5 Years

rr_AverageAnnualReturnYear05

4.36%

10 Years

rr_AverageAnnualReturnYear10

3.85%

Class T Prospectus | First Eagle Overseas Fund | Class A | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.42%

5 Years

rr_AverageAnnualReturnYear05

4.03%

10 Years

rr_AverageAnnualReturnYear10

3.71%

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Class T Prospectus | First Eagle U.S. Value Fund

First Eagle U.S. Value Fund

Investment Objective

First Eagle U.S. Value Fund (“U.S. Value Fund”) seeks long-term growth of capital by investing, under normal market conditions, at least 80% of its net assets (plus any borrowings for investment purposes) in domestic equity and debt securities.

Fees and Expenses of the U.S. Value Fund

The following information describes the fees and expenses you may pay if you buy and hold shares of the U.S. Value Fund.

You may qualify for sales charge discounts if you invest at least $250,000 in the U.S. Value Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	Class T Prospectus First Eagle U.S. Value Fund Class T
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	2.50%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class T Prospectus First Eagle U.S. Value Fund Class T
Management Fees	0.75%	[1]
Distribution and/or Service (12b-1) Fees	0.25%
Other Expenses	0.14%	[2]
Total Annual Operating Expenses (%)	1.14%
Fee Waiver	(0.05%)	[1]
Total Annual Operating Expenses After Fee Waiver (%)	1.09%

Example

The following example is intended to help you compare the cost of investing in the U.S. Value 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 (except that the management fee waiver is taken into account only for the one-year expense example). Please keep in mind your actual costs may be higher or lower.

Sold

Expense Example	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle U.S. Value Fund | Class T | USD ($)	358	598	857	1,597

Held

Expense Example No Redemption	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle U.S. Value Fund | Class T | USD ($)	358	598	857	1,597

Portfolio Turnover Rate

The U.S. Value Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 5.85% of the average value of its portfolio.

Principal Investment Strategies

To achieve its objective of long-term capital growth, the U.S. Value Fund will normally invest at least 80% of its net assets (plus any borrowings for investment purposes) in domestic equity and debt instruments and may invest to a lesser extent in securities of non-U.S. issuers. In particular, the Fund seeks companies exhibiting financial strength and stability, strong management and fundamental value. 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 debt instruments in which the Fund may invest include fixed-income securities without regard to credit rating or time to maturity and short-term debt instruments. The Fund may also invest in gold and other precious metals, and futures contracts related to precious metals. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The investment philosophy and strategy of the U.S. Value 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). 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 contracts).

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in the U.S. Value 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 U.S. Value 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.

• 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, e.g., 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. 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.

• 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.

• 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.

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

• 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 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.

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.

For more information on the risks of investing in the U.S. Value Fund, please see the More Information about the Funds’ Investments section.

Investment Results

The following information provides an indication of the risks of investing in the U.S. Value Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/us-value-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.

Calendar Year Total Returns—Class A

Best Quarter*		Worst Quarter*
Second Quarter 2009	12.57%	Fourth Quarter 2008	-16.90%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Average Annual Returns - Class T Prospectus - First Eagle U.S. Value Fund	1 Year	5 Years	10 Years
Class A	7.17%	8.09%	6.40%
After Taxes on Distributions | Class A	5.05%	6.47%	5.37%
After Taxes on Distributions and Sales of Fund Shares | Class A	5.76%	6.18%	5.03%
Standard & Poor’s 500 Index	21.83%	15.79%	8.50%

[1] The Adviser has contractually agreed to waive its management fee at an annual rate in the amount of 0.05% of the average daily value of the Fund's net assets for the period through February 28, 2019. This waiver has the effect of reducing the management fee shown in the table for the term of the waiver from 0.75% to 0.70%.

[2] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Label

Element

Value

Class T Prospectus | First Eagle U.S. Value Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle U.S. Value Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle U.S. Value Fund (“U.S. Value Fund”) seeks long-term growth of capital by investing, under normal market conditions, at least 80% of its net assets (plus any borrowings for investment purposes) in domestic equity and debt securities.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the U.S. Value 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 U.S. Value Fund.

You may qualify for sales charge discounts if you invest at least $250,000 in the U.S. Value Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

Feb. 28, 2019

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover Rate

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The U.S. Value Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 5.85% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

5.85%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you invest at least $250,000 in the U.S. Value Fund.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 250,000

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, 2017 as adjusted for estimates 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 U.S. Value 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 (except that the management fee waiver is taken into account only for the one-year expense example). 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 long-term capital growth, the U.S. Value Fund will normally invest at least 80% of its net assets (plus any borrowings for investment purposes) in domestic equity and debt instruments and may invest to a lesser extent in securities of non-U.S. issuers. In particular, the Fund seeks companies exhibiting financial strength and stability, strong management and fundamental value. 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 debt instruments in which the Fund may invest include fixed-income securities without regard to credit rating or time to maturity and short-term debt instruments. The Fund may also invest in gold and other precious metals, and futures contracts related to precious metals. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The investment philosophy and strategy of the U.S. Value 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). 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 contracts).

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 U.S. Value 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 U.S. Value 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.

• 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, e.g., 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. 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.

• 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.

• 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.

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

• 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 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.

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.

For more information on the risks of investing in the U.S. Value 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 U.S. Value Fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 U.S. Value Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/us-value-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 U.S. Value Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years compare with those of a broad measure of market performance.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800.334.2143

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.feim.com/individual-investors/fund/us-value-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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Second Quarter 2009	12.57%	Fourth Quarter 2008	-16.90%

* For the period presented in the bar chart above.

Bar Chart, Returns for Class Not Offered in Prospectus [Text]

rr_BarChartReturnsForClassNotOfferedInProspectus

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

12.57%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(16.90%)

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 Narrative

rr_PerformanceTableNarrativeTextBlock

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Class T Prospectus | First Eagle U.S. Value Fund | Standard & Poor’s 500 Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

21.83%

5 Years

rr_AverageAnnualReturnYear05

15.79%

10 Years

rr_AverageAnnualReturnYear10

8.50%

Class T Prospectus | First Eagle U.S. Value Fund | Class T

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

2.50%

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%

^[1]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.14%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.14%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[1]

Total Annual Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

1.09%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 358

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

598

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

857

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,597

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

358

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

598

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

857

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,597

Class T Prospectus | First Eagle U.S. Value Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Annual Return 2008

rr_AnnualReturn2008

(23.09%)

Annual Return 2009

rr_AnnualReturn2009

24.84%

Annual Return 2010

rr_AnnualReturn2010

12.22%

Annual Return 2011

rr_AnnualReturn2011

5.70%

Annual Return 2012

rr_AnnualReturn2012

10.71%

Annual Return 2013

rr_AnnualReturn2013

16.94%

Annual Return 2014

rr_AnnualReturn2014

8.15%

Annual Return 2015

rr_AnnualReturn2015

(5.14%)

Annual Return 2016

rr_AnnualReturn2016

14.77%

Annual Return 2017

rr_AnnualReturn2017

12.79%

1 Year

rr_AverageAnnualReturnYear01

7.17%

5 Years

rr_AverageAnnualReturnYear05

8.09%

10 Years

rr_AverageAnnualReturnYear10

6.40%

Class T Prospectus | First Eagle U.S. Value Fund | Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.05%

5 Years

rr_AverageAnnualReturnYear05

6.47%

10 Years

rr_AverageAnnualReturnYear10

5.37%

Class T Prospectus | First Eagle U.S. Value Fund | Class A | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.76%

5 Years

rr_AverageAnnualReturnYear05

6.18%

10 Years

rr_AverageAnnualReturnYear10

5.03%

[1] The Adviser has contractually agreed to waive its management fee at an annual rate in the amount of 0.05% of the average daily value of the Fund's net assets for the period through February 28, 2019. This waiver has the effect of reducing the management fee shown in the table for the term of the waiver from 0.75% to 0.70%.

[2] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Class T Prospectus | First Eagle Gold Fund

First Eagle Gold Fund

Investment Objective

First Eagle Gold Fund (“Gold Fund”) seeks to provide investors the opportunity to participate in the investment characteristics of gold (and to a limited extent other precious metals) for a portion of their overall investment portfolio.

Fees and Expenses of the Gold Fund

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

You may qualify for sales charge discounts if you invest at least $250,000 in the Gold Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	Class T Prospectus First Eagle Gold Fund Class T
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	2.50%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	none
Redemption Fee (as a percentage of the amount redeemed within 60 days of purchase)	2.00%

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class T Prospectus First Eagle Gold Fund Class T
Management Fees	0.75%
Distribution and/or Service (12b-1) Fees	0.25%
Other Expenses	0.26%	[1]
Total Annual Operating Expenses (%)	1.26%

Example

The following example is intended to help you compare the cost of investing in the Gold 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.

Sold

Expense Example	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle Gold Fund | Class T | USD ($)	375	640	924	1,735

Held

Expense Example No Redemption	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle Gold Fund | Class T | USD ($)	375	640	924	1,735

Portfolio Turnover Rate

The Gold Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 7.90% of the average value of its portfolio.

Principal Investment Strategies

To achieve its objective of providing investors the opportunity to participate in the investment characteristics of gold, the Gold Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in gold and/or securities (which may include both equity and, to a limited extent, debt instruments) directly related to gold or issuers principally engaged in the gold industry, including securities of gold mining finance companies as well as operating companies with long-, medium- or short-life mines. Up to 20% of the Fund’s assets may be invested in equity and, to a limited extent, debt instruments unrelated to gold or the gold industry. The Fund may invest up to 20% of its total assets in debt securities. 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 fixed-income instruments (without regard to credit rating or time to maturity), short-term debt instruments, other precious metals, and futures contracts related to precious metals. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

An investment in the Gold Fund is not intended to be a complete investment program. However, many investors believe that, historically, a limited exposure to investments in gold or gold-related instruments may provide some offset against the market impact of political and economic disruptions, as well as relieve inflationary or deflationary pressures.

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 contracts). The Fund will invest in the Subsidiary in order to gain exposure to the commodities markets within the limitations of the federal tax laws, rules and regulations that apply to regulated investment companies. Unlike the Fund, the Subsidiary may invest without limitation in commodities and related instruments, however, the Subsidiary will comply with the same 1940 Act asset coverage requirements with respect to any investments in commodity-linked derivatives that are applicable to the Fund’s transactions in derivatives. In addition, to the extent applicable to the investment activities of the Subsidiary, the Subsidiary will be subject to the same fundamental investment restrictions and will follow the same compliance policies and procedures as the Fund. Compliance with the Fund’s investment restrictions generally will be measured on an aggregate basis in respect of the Fund’s and the Subsidiary’s portfolios. The Subsidiary will comply with the 1940 Act provisions governing affiliate transactions and custody of assets. The Fund is the sole shareholder of the Subsidiary and does not expect shares of the Subsidiary to be offered or sold to other investors.

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in the Gold 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 Gold 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.

• 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.

• 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.

• Foreign Investment Risk — The Fund may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations. These risks may be more pronounced with respect to investments in emerging markets. Because of the Gold Fund’s policy of investing primarily in gold, securities directly related to gold and/or of companies engaged in the gold industry, a substantial part of the Gold Fund’s assets will generally be invested in securities of companies domiciled or operating in one or more foreign countries, including emerging markets.

• Diversification Risk — The Fund is a non-diversified mutual fund, and as a result, an investment in the Fund may expose your money to greater risks than if you invest in a diversified fund. The Fund may invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

• 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.

• 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, e.g., 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. 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.

Gold Fund

• 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.

• 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 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.

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.

For more information on the risks of investing in the Gold Fund, please see the More Information about the Funds’ Investments section.

Investment Results

The following information provides an indication of the risks of investing in the Gold Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/gold-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.

Calendar Year Total Returns—Class A

Best Quarter*		Worst Quarter*
First Quarter 2016	32.55%	Second Quarter 2013	-32.24%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Average Annual Returns - Class T Prospectus - First Eagle Gold Fund	1 Year	5 Years	10 Years
Class A	2.73%	(10.10%)	(2.26%)
After Taxes on Distributions | Class A	2.73%	(10.10%)	(2.58%)
After Taxes on Distributions and Sales of Fund Shares | Class A	1.55%	(7.27%)	(1.47%)
MSCI World Index	22.40%	11.64%	5.03%
FTSE Gold Mines Index	9.11%	(11.48%)	(6.36%)

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Label

Element

Value

Class T Prospectus | First Eagle Gold Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle Gold Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle Gold Fund (“Gold Fund”) seeks to provide investors the opportunity to participate in the investment characteristics of gold (and to a limited extent other precious metals) for a portion of their overall investment portfolio.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Gold 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 Gold Fund.

You may qualify for sales charge discounts if you invest at least $250,000 in the Gold Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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

The Gold Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 7.90% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

7.90%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you invest at least $250,000 in the Gold Fund.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 250,000

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, 2017 as adjusted for estimates 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 Gold 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 providing investors the opportunity to participate in the investment characteristics of gold, the Gold Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in gold and/or securities (which may include both equity and, to a limited extent, debt instruments) directly related to gold or issuers principally engaged in the gold industry, including securities of gold mining finance companies as well as operating companies with long-, medium- or short-life mines. Up to 20% of the Fund’s assets may be invested in equity and, to a limited extent, debt instruments unrelated to gold or the gold industry. The Fund may invest up to 20% of its total assets in debt securities. 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 fixed-income instruments (without regard to credit rating or time to maturity), short-term debt instruments, other precious metals, and futures contracts related to precious metals. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

An investment in the Gold Fund is not intended to be a complete investment program. However, many investors believe that, historically, a limited exposure to investments in gold or gold-related instruments may provide some offset against the market impact of political and economic disruptions, as well as relieve inflationary or deflationary pressures.

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 contracts). The Fund will invest in the Subsidiary in order to gain exposure to the commodities markets within the limitations of the federal tax laws, rules and regulations that apply to regulated investment companies. Unlike the Fund, the Subsidiary may invest without limitation in commodities and related instruments, however, the Subsidiary will comply with the same 1940 Act asset coverage requirements with respect to any investments in commodity-linked derivatives that are applicable to the Fund’s transactions in derivatives. In addition, to the extent applicable to the investment activities of the Subsidiary, the Subsidiary will be subject to the same fundamental investment restrictions and will follow the same compliance policies and procedures as the Fund. Compliance with the Fund’s investment restrictions generally will be measured on an aggregate basis in respect of the Fund’s and the Subsidiary’s portfolios. The Subsidiary will comply with the 1940 Act provisions governing affiliate transactions and custody of assets. The Fund is the sole shareholder of the Subsidiary and does not expect shares of the Subsidiary to be offered or sold to other investors.

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 Gold 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 Gold 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.

• 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.

• 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.

• Foreign Investment Risk — The Fund may invest in foreign investments. Foreign investments are susceptible to less politically, economically and socially stable environments, foreign currency and exchange rate changes, and adverse changes to government regulations. These risks may be more pronounced with respect to investments in emerging markets. Because of the Gold Fund’s policy of investing primarily in gold, securities directly related to gold and/or of companies engaged in the gold industry, a substantial part of the Gold Fund’s assets will generally be invested in securities of companies domiciled or operating in one or more foreign countries, including emerging markets.

• Diversification Risk — The Fund is a non-diversified mutual fund, and as a result, an investment in the Fund may expose your money to greater risks than if you invest in a diversified fund. The Fund may invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

• 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.

• 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, e.g., 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. 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.

Gold Fund

• 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.

• 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 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.

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.

For more information on the risks of investing in the Gold 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 Gold Fund.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Fund is a non-diversified mutual fund, and as a result, an investment in the Fund may expose your money to greater risks than if you invest in a diversified fund. The Fund may invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 Gold Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/gold-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 Gold Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years compare with those of a broad measure of market performance.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800.334.2143

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.feim.com/individual-investors/fund/gold-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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
First Quarter 2016	32.55%	Second Quarter 2013	-32.24%

* For the period presented in the bar chart above.

Bar Chart, Returns for Class Not Offered in Prospectus [Text]

rr_BarChartReturnsForClassNotOfferedInProspectus

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

32.55%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2013

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(32.24%)

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 Narrative

rr_PerformanceTableNarrativeTextBlock

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Class T Prospectus | First Eagle Gold Fund | MSCI World Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

22.40%

5 Years

rr_AverageAnnualReturnYear05

11.64%

10 Years

rr_AverageAnnualReturnYear10

5.03%

Class T Prospectus | First Eagle Gold Fund | FTSE Gold Mines Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.11%

5 Years

rr_AverageAnnualReturnYear05

(11.48%)

10 Years

rr_AverageAnnualReturnYear10

(6.36%)

Class T Prospectus | First Eagle Gold Fund | Class T

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

2.50%

Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(2.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.26%

^[1]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.26%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 375

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

640

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

924

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,735

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

375

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

640

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

924

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,735

Class T Prospectus | First Eagle Gold Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Annual Return 2008

rr_AnnualReturn2008

(14.27%)

Annual Return 2009

rr_AnnualReturn2009

39.18%

Annual Return 2010

rr_AnnualReturn2010

34.64%

Annual Return 2011

rr_AnnualReturn2011

(11.13%)

Annual Return 2012

rr_AnnualReturn2012

(5.15%)

Annual Return 2013

rr_AnnualReturn2013

(46.99%)

Annual Return 2014

rr_AnnualReturn2014

(2.41%)

Annual Return 2015

rr_AnnualReturn2015

(19.28%)

Annual Return 2016

rr_AnnualReturn2016

36.92%

Annual Return 2017

rr_AnnualReturn2017

8.12%

1 Year

rr_AverageAnnualReturnYear01

2.73%

5 Years

rr_AverageAnnualReturnYear05

(10.10%)

10 Years

rr_AverageAnnualReturnYear10

(2.26%)

Class T Prospectus | First Eagle Gold Fund | Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.73%

5 Years

rr_AverageAnnualReturnYear05

(10.10%)

10 Years

rr_AverageAnnualReturnYear10

(2.58%)

Class T Prospectus | First Eagle Gold Fund | Class A | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.55%

5 Years

rr_AverageAnnualReturnYear05

(7.27%)

10 Years

rr_AverageAnnualReturnYear10

(1.47%)

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Class T Prospectus | First Eagle Global Income Builder Fund

First Eagle Global Income Builder Fund

Investment Objective

First Eagle Global Income Builder Fund (“Global Income Builder Fund”) seeks current income generation and long-term growth of capital.

Fees and Expenses of the Global Income Builder Fund

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 invest at least $250,000 in the Global Income Builder Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	Class T Prospectus First Eagle Global Income Builder Fund Class T
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	2.50%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class T Prospectus First Eagle Global Income Builder Fund Class T
Management Fees	0.75%
Distribution and/or Service (12b-1) Fees	0.25%
Other Expenses	0.19%	[1]
Total Annual Fund Operating Expenses (%)	1.19%

Example

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.

Sold

Expense Example	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle Global Income Builder Fund | Class T | USD ($)	368	618	888	1,657

Held

Expense Example No Redemption	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle Global Income Builder Fund | Class T | USD ($)	368	618	888	1,657

Portfolio Turnover Rate

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 23.18% of the average value of its portfolio.

Principal Investment Strategies

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 (generally market price).

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.

Principal Investment Risks

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.

• 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.

• 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).

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.

For more information on the risks of investing in the Global Income Builder Fund, please see the More Information about the Funds’ Investments section.

Investment Results

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.

Calendar Year Total Returns Class A

Best Quarter*		Worst Quarter*
Third Quarter 2013	5.09%	Third Quarter 2015	-6.08%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Average Annual Returns - Class T Prospectus - First Eagle Global Income Builder Fund	1 Year	5 Years	Since Inception	Inception Date
Class A	7.31%	5.50%	6.01%	May 01, 2012
After Taxes on Distributions | Class A	6.35%	4.30%	4.85%
After Taxes on Distributions and Sales of Fund Shares | Class A	4.34%	3.84%	4.28%
60% MSCI World Index/40% Bloomberg Barclays U.S. Aggregate Bond Index	14.52%	7.86%	7.69%	May 01, 2012
MSCI World Index	22.40%	11.64%	11.07%	May 01, 2012
Bloomberg Barclays U.S. Aggregate Bond Index	3.54%	2.10%	2.36%	May 01, 2012

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Label

Element

Value

Class T Prospectus | 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 invest at least $250,000 in the Global Income Builder Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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 23.18% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

23.18%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you invest at least $250,000 in the Global Income Builder Fund.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 250,000

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, 2017 as adjusted for estimates 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 (generally market price).

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.

• 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.

• 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).

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.

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.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 One Year or Less [Text]

rr_PerformanceOneYearOrLess

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here.

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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Third Quarter 2013	5.09%	Third Quarter 2015	-6.08%

* For the period presented in the bar chart above.

Bar Chart, Returns for Class Not Offered in Prospectus [Text]

rr_BarChartReturnsForClassNotOfferedInProspectus

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

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 Narrative

rr_PerformanceTableNarrativeTextBlock

The bar chart above and table below disclose returns only for Class A shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Class T Prospectus | 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

14.52%

5 Years

rr_AverageAnnualReturnYear05

7.86%

Since Inception

rr_AverageAnnualReturnSinceInception

7.69%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 01, 2012

Class T Prospectus | First Eagle Global Income Builder Fund | MSCI World Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

22.40%

5 Years

rr_AverageAnnualReturnYear05

11.64%

Since Inception

rr_AverageAnnualReturnSinceInception

11.07%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 01, 2012

Class T Prospectus | First Eagle Global Income Builder Fund | Bloomberg Barclays U.S. Aggregate Bond Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.54%

5 Years

rr_AverageAnnualReturnYear05

2.10%

Since Inception

rr_AverageAnnualReturnSinceInception

2.36%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 01, 2012

Class T Prospectus | First Eagle Global Income Builder Fund | Class T

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

2.50%

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

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.19%

^[1]

Total Annual Fund Operating Expenses (%)

rr_ExpensesOverAssets

1.19%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 368

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

618

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

888

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,657

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

368

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

618

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

888

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,657

Class T Prospectus | First Eagle Global Income Builder Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

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%

Annual Return 2017

rr_AnnualReturn2017

12.96%

1 Year

rr_AverageAnnualReturnYear01

7.31%

5 Years

rr_AverageAnnualReturnYear05

5.50%

Since Inception

rr_AverageAnnualReturnSinceInception

6.01%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 01, 2012

Class T Prospectus | First Eagle Global Income Builder Fund | Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.35%

5 Years

rr_AverageAnnualReturnYear05

4.30%

Since Inception

rr_AverageAnnualReturnSinceInception

4.85%

Class T Prospectus | First Eagle Global Income Builder Fund | Class A | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.34%

5 Years

rr_AverageAnnualReturnYear05

3.84%

Since Inception

rr_AverageAnnualReturnSinceInception

4.28%

[1] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Class T Prospectus | First Eagle High Yield Fund

First Eagle High Yield Fund

Investment Objective

First Eagle High Yield Fund (“High Yield Fund”) seeks to provide investors with a high level of current income.

Fees and Expenses of the High Yield Fund

The following information describes the fees and expenses you may pay if you buy and hold shares of the High Yield Fund.

You may qualify for sales charge discounts if you invest at least $250,000 in the High Yield Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	Class T Prospectus First Eagle High Yield Fund Class T
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	2.50%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class T Prospectus First Eagle High Yield Fund Class T
Management Fees	0.70%	[1]
Distribution and/or Service (12b-1) Fees	0.25%
Other Expenses	0.26%	[2]
Total Annual Operating Expenses (%)	1.21%
Fee Waiver	(0.05%)	[1]
Total Annual Operating Expenses After Fee Waiver (%)	1.16%

Example

The following example is intended to help you compare the cost of investing in the High Yield 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 (except that the management fee waiver is taken into account only for the one-year expense example). Please keep in mind your actual costs may be higher or lower.

Sold

Expense Example	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle High Yield Fund | Class T | USD ($)	365	620	894	1,675

Held

Expense Example No Redemption	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle High Yield Fund | Class T | USD ($)	365	620	894	1,675

Portfolio Turnover Rate

There are transaction costs due to the bid/ask spread in the case of bonds or commissions in the case of stocks. The High Yield Fund pays transaction costs, such as commissions, 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 25.77% of the average value of its portfolio.

Principal Investment Strategies

To pursue its investment objective, the High Yield Fund normally invests at least 80% of its net assets (plus any borrowings for investment purposes) in high yield, below investment-grade securities (commonly referred to as “junk bonds”) and instruments. Such high yield instruments may include corporate bonds and loans, municipal bonds, and mortgage-backed and asset-backed securities. The Fund may invest in, and count for the purposes of this 80% allotment, unrated securities or other instruments deemed by the Fund’s Adviser to be below investment grade. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation and, in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The Fund may invest its assets in the securities of both U.S. and foreign issuers. 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.

The Fund may invest in securities with any investment rating or time to maturity, as well as unrated securities. An investment in the Fund is not intended to be a complete investment program.

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in the High Yield 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:

• 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.

• High Yield Risk — The Fund will invest at least 80% of its net assets (plus any borrowings for investment purposes) under normal market conditions 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 securities 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.

• 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 may 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.

• 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.

• 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.

• 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.

• 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.

Summary Information about the High Yield Fund

• 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.

• 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. The Fund may use derivatives in seeking 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.

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.

For more information on the risks of investing in the High Yield Fund, please see the More Information about the Funds’ Investments section.

Investment Results

The High Yield Fund commenced operations in its present form on or about December 30, 2011 and is the successor to the Old Mutual High Yield Fund (the “Predecessor Fund”) pursuant to a reorganization on or about that same date. The Predecessor Fund had similar investment objectives and strategies as the Fund, but was managed by another investment adviser.

The following information provides an indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1 and 5 years and since inception 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/high-yield-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.

Calendar Year Total Returns—Class I

Best Quarter*		Worst Quarter*
Second Quarter 2009	24.95%	Fourth Quarter 2008	-10.60%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

The bar chart above and table below disclose returns only for Class I shares (which are not offered by this prospectus). Returns shown for Class I shares assume commencement of operations on November 19, 2007, which is the date of organization of the Predecessor Fund and includes the returns of the Predecessor Fund for periods prior to January 1, 2012.

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses. Because the Class T share expenses are anticipated to be higher than Class I, Class T share performance would be lower.

Average Annual Returns - Class T Prospectus - First Eagle High Yield Fund	1 Year	5 Years	10 Years
Class I	4.86%	4.03%	8.60%
After Taxes on Distributions | Class I	2.43%	1.33%	4.97%
After Taxes on Distributions and Sales of Fund Shares | Class I	2.73%	1.82%	5.17%
Bloomberg Barclays U.S. Corporate High Yield Index	7.50%	5.78%	8.03%

[1] The Adviser has contractually agreed to waive its management fee at an annual rate in the amount of 0.05% of the average daily value of the Fund's net assets for the period through February 28, 2019. This waiver has the effect of reducing the management fee shown in the table for the term of the waiver from 0.70% to 0.65%.

[2] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Label

Element

Value

Class T Prospectus | First Eagle High Yield Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle High Yield Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle High Yield Fund (“High Yield Fund”) seeks to provide investors with a high level of current income.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the High Yield 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 High Yield Fund.

You may qualify for sales charge discounts if you invest at least $250,000 in the High Yield Fund. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

Feb. 28, 2019

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 High Yield Fund pays transaction costs, such as commissions, 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 25.77% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

25.77%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you invest at least $250,000 in the High Yield Fund.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 250,000

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, 2017 as adjusted for estimates 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 High Yield 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 (except that the management fee waiver is taken into account only for the one-year expense example). 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 pursue its investment objective, the High Yield Fund normally invests at least 80% of its net assets (plus any borrowings for investment purposes) in high yield, below investment-grade securities (commonly referred to as “junk bonds”) and instruments. Such high yield instruments may include corporate bonds and loans, municipal bonds, and mortgage-backed and asset-backed securities. The Fund may invest in, and count for the purposes of this 80% allotment, unrated securities or other instruments deemed by the Fund’s Adviser to be below investment grade. The Fund “counts” relevant derivative positions towards its “80% of assets” allocation and, in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The Fund may invest its assets in the securities of both U.S. and foreign issuers. 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.

The Fund may invest in securities with any investment rating or time to maturity, as well as unrated securities. An investment in the Fund is not intended to be a complete investment program.

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 High Yield 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:

• 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.

• High Yield Risk — The Fund will invest at least 80% of its net assets (plus any borrowings for investment purposes) under normal market conditions 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 securities 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.

• 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 may 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.

• 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.

• 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.

• 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.

• 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.

Summary Information about the High Yield Fund

• 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.

• 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. The Fund may use derivatives in seeking 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.

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.

For more information on the risks of investing in the High Yield 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 High Yield Fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Investment Results

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The High Yield Fund commenced operations in its present form on or about December 30, 2011 and is the successor to the Old Mutual High Yield Fund (the “Predecessor Fund”) pursuant to a reorganization on or about that same date. The Predecessor Fund had similar investment objectives and strategies as the Fund, but was managed by another investment adviser.

The following information provides an indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1 and 5 years and since inception 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/high-yield-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 Fund by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1 and 5 years and since inception compare with those of a broad measure of market performance.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800.334.2143

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.feim.com/individual-investors/fund/high-yield-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 I

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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Second Quarter 2009	24.95%	Fourth Quarter 2008	-10.60%

* For the period presented in the bar chart above.

Bar Chart, Returns for Class Not Offered in Prospectus [Text]

rr_BarChartReturnsForClassNotOfferedInProspectus

The bar chart above and table below disclose returns only for Class I shares (which are not offered by this prospectus).

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

24.95%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(10.60%)

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 Narrative

rr_PerformanceTableNarrativeTextBlock

The bar chart above and table below disclose returns only for Class I shares (which are not offered by this prospectus). Returns shown for Class I shares assume commencement of operations on November 19, 2007, which is the date of organization of the Predecessor Fund and includes the returns of the Predecessor Fund for periods prior to January 1, 2012.

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses. Because the Class T share expenses are anticipated to be higher than Class I, Class T share performance would be lower.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Class T Prospectus | First Eagle High Yield Fund | Bloomberg Barclays U.S. Corporate High Yield Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.50%

5 Years

rr_AverageAnnualReturnYear05

5.78%

10 Years

rr_AverageAnnualReturnYear10

8.03%

Class T Prospectus | First Eagle High Yield Fund | Class T

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

2.50%

Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.70%

^[1]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.26%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.21%

Fee Waiver

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[1]

Total Annual Operating Expenses After Fee Waiver (%)

rr_NetExpensesOverAssets

1.16%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 365

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

620

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

894

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,675

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

365

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

620

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

894

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,675

Class T Prospectus | First Eagle High Yield Fund | Class I

Risk/Return:

rr_RiskReturnAbstract

Annual Return 2008

rr_AnnualReturn2008

(15.70%)

Annual Return 2009

rr_AnnualReturn2009

60.00%

Annual Return 2010

rr_AnnualReturn2010

15.76%

Annual Return 2011

rr_AnnualReturn2011

4.08%

Annual Return 2012

rr_AnnualReturn2012

15.19%

Annual Return 2013

rr_AnnualReturn2013

6.92%

Annual Return 2014

rr_AnnualReturn2014

(0.24%)

Annual Return 2015

rr_AnnualReturn2015

(7.04%)

Annual Return 2016

rr_AnnualReturn2016

17.19%

Annual Return 2017

rr_AnnualReturn2017

4.86%

1 Year

rr_AverageAnnualReturnYear01

4.86%

5 Years

rr_AverageAnnualReturnYear05

4.03%

10 Years

rr_AverageAnnualReturnYear10

8.60%

Class T Prospectus | First Eagle High Yield Fund | Class I | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.43%

5 Years

rr_AverageAnnualReturnYear05

1.33%

10 Years

rr_AverageAnnualReturnYear10

4.97%

Class T Prospectus | First Eagle High Yield Fund | Class I | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.73%

5 Years

rr_AverageAnnualReturnYear05

1.82%

10 Years

rr_AverageAnnualReturnYear10

5.17%

[1] The Adviser has contractually agreed to waive its management fee at an annual rate in the amount of 0.05% of the average daily value of the Fund's net assets for the period through February 28, 2019. This waiver has the effect of reducing the management fee shown in the table for the term of the waiver from 0.70% to 0.65%.

[2] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Class T Prospectus | First Eagle Fund of America

First Eagle Fund of America

Investment Objective

First Eagle Fund of America (“Fund of America”) seeks capital appreciation by investing primarily in domestic stocks and, to a lesser extent, in debt and foreign equity securities.

Fees and Expenses of the Fund of America

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

You may qualify for sales charge discounts if you invest at least $250,000 in Fund of America. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End Sales Load and Waiver Terms.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees	Class T Prospectus First Eagle Fund of America Class T
Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)	2.50%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)	none

Annual Fund Operating Expenses (expenses you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class T Prospectus First Eagle Fund of America Class T
Management Fees	0.90%	[1]
Distribution and Service (12b-1) Fees	0.25%
Other Expenses	0.16%	[2]
Total Annual Operating Expenses (%)	1.31%

Example

The following example is intended to help you compare the cost of investing in Fund of America 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.

Sold

Expense Example	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle Fund of America | Class T | USD ($)	380	655	950	1,790

Held

Expense Example No Redemption	1 Year	3 Years	5 Years	10 Years
Class T Prospectus | First Eagle Fund of America | Class T | USD ($)	380	655	950	1,790

Portfolio Turnover Rate

Fund of America 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 of America operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, Fund of America’s portfolio turnover rate was 57.02% of the average value of its portfolio.

Principal Investment Strategies

To achieve its objective of capital appreciation, Fund of America will primarily invest in domestic stocks and, to a lesser extent, debt and foreign equity instruments. Normally, at least 80% of the Fund’s net assets (plus any borrowings for investment purposes) are invested in domestic equity and debt instruments. Equity securities include common stocks, preferred stocks, convertible securities and warrants. The Fund may also invest in repurchase agreements and derivatives.

Derivatives include investing in options, futures and swaps and related products. Specifically, the Fund may enter into interest rate, credit default, currency, equity, fixed income and index swaps and the purchase or sale of related caps, floors and collars.

In addition, the Fund may enter into options on securities and on stock indices to limit the Fund’s investment risk and augment its investment return. Further, the Fund may write “covered” call options on equity or debt securities and on stock indices in seeking to enhance investment return or to hedge against declines in the prices of portfolio securities or may write put options to hedge against increases in the prices of securities which it intends to purchase. The Fund also may write call options on broadly based stock and bond market indices if at the time of writing it holds a portfolio of stocks or bonds listed on such index. Finally, the Fund may utilize futures contracts and options on futures on securities exchanges or in the over-the-counter market.

The Fund may enter into certain types of repurchase agreements, primarily as a cash management strategy.

Normally, at least 80% of the Fund’s net assets (plus any borrowings for investment purposes) will be invested in domestic equity and debt instruments. The Fund “counts” derivative positions on these instruments for purposes of this 80% allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The investment philosophy and strategy of Fund of America can be broadly characterized as a bottom-up, event-driven approach to choose securities that the Fund believes are undervalued and should perform well. In a bottom-up approach, companies and securities are researched and chosen individually. In an event-driven approach, one looks for companies that appear to be undervalued in relation to their potential value in light of positive corporate changes. Signals of corporate change can be management changes, large share repurchases, potential acquisitions or mergers. If changes are successful, these companies should realize a rise in the stock price. Fund of America invests in the securities of companies that it believes are undervalued relative to their overall financial and managerial strength. 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 invest in debt securities generally without regard to their credit rating or time to maturity. However, the Fund has no current intention of investing more than 5% of its net assets in high yield bonds.

Principal Investment Risks

As with any mutual fund investment, you may lose money by investing in Fund of America. 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 Fund of America, 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 Fund of America invests, as well as economic, political, or social events in the United States or abroad.

• Event-Driven Style Risk — The event-driven investment style carries the additional risk that the event anticipated occurs later than expected, does not occur at all, or does not have the desired effect on the market price of the securities.

• Diversification Risk — The Fund is a non-diversified mutual fund, and as a result, an investment in Fund of America may expose your money to greater risks than if you invest in a diversified fund. Fund of America will invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

• 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, e.g., 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. 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.

• 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.

• Repurchase Agreements Risk — The Fund may enter into certain types of repurchase agreements, primarily as a cash management strategy. If the seller fails to repurchase the security and the market value declines, the Fund may lose money.

• Options Risk — The Fund may engage in various options transactions in which Fund of America seeks to limit investment risk or increase investment returns by purchasing the right to buy or sell, or by selling the obligation to buy or sell, a security at a set price in the future. The Fund pays a premium when buying options and receives a premium when selling options. When trading options, the Fund may incur losses or forego otherwise realizable gains if market prices do not move as expected.

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

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.

For more information on the risks of investing in Fund of America, please see the More Information about the Funds’ Investments section.

Investment Results

The following information provides an indication of the risks of investing in Fund of America by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/fund-america 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.

Calendar Year Total Returns—Class Y

Best Quarter*		Worst Quarter*
Second Quarter 2009	13.03%	Fourth Quarter 2008	-20.71%

* For the period presented in the bar chart above.

Average Annual Total Returns as of December 31, 2017

The bar chart above and table below disclose returns only for Class Y shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Average Annual Returns - Class T Prospectus - First Eagle Fund of America	1 Year	5 Years	10 Years
Class Y	21.77%	10.73%	7.78%
After Taxes on Distributions | Class Y	19.14%	9.31%	6.82%
After Taxes on Distributions and Sales of Fund Shares | Class Y	14.44%	8.39%	6.18%
Standard & Poor’s 500 Index	21.83%	15.79%	8.50%

[1] 0.90% of the first $2.25 billion of the Fund's average daily net assets, 0.85% of the next $2.75 billion of average daily net assets, and 0.80% of average daily net assets in excess of $5 billion.

[2] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Label

Element

Value

Class T Prospectus | First Eagle Fund of America

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

First Eagle Fund of America

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

First Eagle Fund of America (“Fund of America”) seeks capital appreciation by investing primarily in domestic stocks and, to a lesser extent, in debt and foreign equity securities.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses of the Fund of America

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

You may qualify for sales charge discounts if you invest at least $250,000 in Fund of America. Information about these discounts is available from your financial professional and in the How to Purchase Shares and Public Offering Price of Class T Shares sections on pages 68 and 73, respectively, and in the appendix to this Prospectus titled Intermediary-Specific Front-End 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

Fund of America 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 of America operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, Fund of America’s portfolio turnover rate was 57.02% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

57.02%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you invest at least $250,000 in Fund of America.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 250,000

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, 2017 as adjusted for estimates 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 Fund of America 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 capital appreciation, Fund of America will primarily invest in domestic stocks and, to a lesser extent, debt and foreign equity instruments. Normally, at least 80% of the Fund’s net assets (plus any borrowings for investment purposes) are invested in domestic equity and debt instruments. Equity securities include common stocks, preferred stocks, convertible securities and warrants. The Fund may also invest in repurchase agreements and derivatives.

Derivatives include investing in options, futures and swaps and related products. Specifically, the Fund may enter into interest rate, credit default, currency, equity, fixed income and index swaps and the purchase or sale of related caps, floors and collars.

In addition, the Fund may enter into options on securities and on stock indices to limit the Fund’s investment risk and augment its investment return. Further, the Fund may write “covered” call options on equity or debt securities and on stock indices in seeking to enhance investment return or to hedge against declines in the prices of portfolio securities or may write put options to hedge against increases in the prices of securities which it intends to purchase. The Fund also may write call options on broadly based stock and bond market indices if at the time of writing it holds a portfolio of stocks or bonds listed on such index. Finally, the Fund may utilize futures contracts and options on futures on securities exchanges or in the over-the-counter market.

The Fund may enter into certain types of repurchase agreements, primarily as a cash management strategy.

Normally, at least 80% of the Fund’s net assets (plus any borrowings for investment purposes) will be invested in domestic equity and debt instruments. The Fund “counts” derivative positions on these instruments for purposes of this 80% allocation, and in doing so, values each position at the price at which it is held on the Fund’s books (generally market price).

The investment philosophy and strategy of Fund of America can be broadly characterized as a bottom-up, event-driven approach to choose securities that the Fund believes are undervalued and should perform well. In a bottom-up approach, companies and securities are researched and chosen individually. In an event-driven approach, one looks for companies that appear to be undervalued in relation to their potential value in light of positive corporate changes. Signals of corporate change can be management changes, large share repurchases, potential acquisitions or mergers. If changes are successful, these companies should realize a rise in the stock price. Fund of America invests in the securities of companies that it believes are undervalued relative to their overall financial and managerial strength. 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 invest in debt securities generally without regard to their credit rating or time to maturity. However, the Fund has no current intention of investing more than 5% of its net assets in high yield bonds.

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 Fund of America. 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 Fund of America, 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 Fund of America invests, as well as economic, political, or social events in the United States or abroad.

• Event-Driven Style Risk — The event-driven investment style carries the additional risk that the event anticipated occurs later than expected, does not occur at all, or does not have the desired effect on the market price of the securities.

• Diversification Risk — The Fund is a non-diversified mutual fund, and as a result, an investment in Fund of America may expose your money to greater risks than if you invest in a diversified fund. Fund of America will invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

• 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, e.g., 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. 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.

• 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.

• Repurchase Agreements Risk — The Fund may enter into certain types of repurchase agreements, primarily as a cash management strategy. If the seller fails to repurchase the security and the market value declines, the Fund may lose money.

• Options Risk — The Fund may engage in various options transactions in which Fund of America seeks to limit investment risk or increase investment returns by purchasing the right to buy or sell, or by selling the obligation to buy or sell, a security at a set price in the future. The Fund pays a premium when buying options and receives a premium when selling options. When trading options, the Fund may incur losses or forego otherwise realizable gains if market prices do not move as expected.

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

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.

For more information on the risks of investing in Fund of America, 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 Fund of America.

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Fund is a non-diversified mutual fund, and as a result, an investment in Fund of America may expose your money to greater risks than if you invest in a diversified fund. Fund of America will invest in a limited number of companies and industries, therefore gains or losses in a particular security may have a greater impact on their share price.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

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.

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 Fund of America by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years 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/fund-america 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 Fund of America by showing changes in the Fund’s performance from year to year, and by showing how the Fund’s average annual returns for 1, 5 and 10 years compare with those of a broad measure of market performance.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

800.334.2143

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.feim.com/individual-investors/fund/fund-america

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 Y

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 Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter*		Worst Quarter*
Second Quarter 2009	13.03%	Fourth Quarter 2008	-20.71%

* For the period presented in the bar chart above.

Bar Chart, Returns for Class Not Offered in Prospectus [Text]

rr_BarChartReturnsForClassNotOfferedInProspectus

The bar chart above and table below disclose returns only for Class Y shares (which are not offered by this prospectus).

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

13.03%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(20.71%)

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 Narrative

rr_PerformanceTableNarrativeTextBlock

The bar chart above and table below disclose returns only for Class Y shares (which are not offered by this prospectus).

While no information is shown for the Class T shares (because they have no or less than a full year’s performance as of December 31, 2017), annual returns for Class T shares would have been substantially similar to those shown here. Class T shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that Class T shares do not have the same expenses.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of December 31, 2017

Class T Prospectus | First Eagle Fund of America | Standard & Poor’s 500 Index

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

21.83%

5 Years

rr_AverageAnnualReturnYear05

15.79%

10 Years

rr_AverageAnnualReturnYear10

8.50%

Class T Prospectus | First Eagle Fund of America | Class T

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) on Purchases (as a percentage of public offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

2.50%

Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of your purchase or redemption price)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.90%

^[1]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.16%

^[2]

Total Annual Operating Expenses (%)

rr_ExpensesOverAssets

1.31%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 380

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

655

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

950

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,790

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

380

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

655

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

950

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,790

Class T Prospectus | First Eagle Fund of America | Class Y

Risk/Return:

rr_RiskReturnAbstract

Annual Return 2008

rr_AnnualReturn2008

(30.74%)

Annual Return 2009

rr_AnnualReturn2009

26.13%

Annual Return 2010

rr_AnnualReturn2010

21.33%

Annual Return 2011

rr_AnnualReturn2011

(1.01%)

Annual Return 2012

rr_AnnualReturn2012

21.16%

Annual Return 2013

rr_AnnualReturn2013

31.04%

Annual Return 2014

rr_AnnualReturn2014

10.32%

Annual Return 2015

rr_AnnualReturn2015

(3.54%)

Annual Return 2016

rr_AnnualReturn2016

(1.97%)

Annual Return 2017

rr_AnnualReturn2017

21.77%

1 Year

rr_AverageAnnualReturnYear01

21.77%

5 Years

rr_AverageAnnualReturnYear05

10.73%

10 Years

rr_AverageAnnualReturnYear10

7.78%

Class T Prospectus | First Eagle Fund of America | Class Y | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

19.14%

5 Years

rr_AverageAnnualReturnYear05

9.31%

10 Years

rr_AverageAnnualReturnYear10

6.82%

Class T Prospectus | First Eagle Fund of America | Class Y | After Taxes on Distributions and Sales of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

14.44%

5 Years

rr_AverageAnnualReturnYear05

8.39%

10 Years

rr_AverageAnnualReturnYear10

6.18%

[1] 0.90% of the first $2.25 billion of the Fund's average daily net assets, 0.85% of the next $2.75 billion of average daily net assets, and 0.80% of average daily net assets in excess of $5 billion.

[2] "Other Expenses" shown generally reflect actual expenses for the Fund for the fiscal year ended October 31, 2017 as adjusted for estimates in the case of newly organized share classes.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	Mar. 01, 2018