rr_ProspectusTable

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Investment Objective

rr_ObjectivePrimaryTextBlock

The Fund’s investment objective is long-term capital appreciation.

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Fees and Expenses of the Fund

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This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in all classes of the American Beacon Funds on an aggregated basis. More information about these and other discounts is available from your financial professional and in “Choosing Your Share Class” on page 45 of the Prospectus and “Additional Purchase and Sale Information for A Class Shares” on page 41 of the Statement of Additional Information (“SAI”). With respect to purchases of shares through specific intermediaries, you may find additional information regarding sales charge discounts and waivers in Appendix A to the Fund’s Prospectus entitled “Intermediary Sales Charge Discounts, Waivers and Other Information.”

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointDiscounts

You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in all classes of the American Beacon Funds on an aggregated basis.

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_OperatingExpensesCaption

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

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2023

rr_ExpensesDeferredChargesTextBlock

A contingent deferred sales charge (‘‘CDSC’’) of 0.50% will be charged on certain purchases of $1,000,000 or more of A Class shares that are redeemed in whole or part within 18 months of purchase.

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Example

Expense Example, No Redemption, By Year, Caption [Text]

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This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same, except that this Example reflects the fee waiver/expense reimbursement arrangement for each share class through April 30, 2023. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption of shares:

rr_PortfolioTurnoverHeading

Portfolio Turnover

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The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual Fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 28% of the average value of its portfolio.

rr_PortfolioTurnoverRate

28.00%

rr_StrategyHeading

Principal Investment Strategies

rr_StrategyNarrativeTextBlock

Under normal circumstances, at least 80% of the Fund’s net assets (plus the amount of any borrowings for investment purposes) are invested in securities of small capitalization companies. The Fund considers a company to be a small capitalization company if it has a market capitalization, at the time of investment, within the range of the market capitalizations of the companies in the Russell 2000^® Index. The capitalization range of that index is subject to change over time due to market activity or changes in the composition of the index. As of February 28, 2022, the market capitalizations of the companies in the Russell 2000 Index ranged from $18.6 million to $12 billion.

The Fund’s investment sub-advisor, Bahl & Gaynor Inc., d/b/a Bahl & Gaynor Investment Counsel (“Bahl & Gaynor”) pursues its small cap growth strategy by focusing on high-quality dividend-paying stocks. Quantitative tools are initially used for screening purposes, but Bahl & Gaynor’s investment process is primarily driven by fundamental, bottom-up, company-focused processes. The investment process begins by quantitatively screening the stock universe to identify companies with perceived competitive advantages by evaluating their historical revenue growth, earnings growth, long-term debt/capital, dividend history and cash flows. Bahl & Gaynor conducts extensive fundamental research on potential portfolio companies to determine which stock(s) provide the best risk/reward opportunities for inclusion in the portfolio. Bahl & Gaynor typically will sell an investment if the company’s fundamentals have changed or the company’s market capitalization (stock market worth) moves outside of the small cap range.

Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning, the Fund may have significant positions in particular sectors, including the Industrials sector. However, as the sector composition of the Fund’s portfolio changes over time, the Fund’s exposure to the Industrials sector may be lower at a future date, and the Fund’s exposure to other market sectors may be higher.

The Fund’s equity investments may include common stocks, depositary receipts that may include American Depositary Receipts (“ADRs”), master limited partnerships (“MLPs”), U.S. dollar-denominated foreign stocks traded on U.S. exchanges, and real estate investments trusts (“REITs”). The Fund may invest in stocks considered to be value stocks, which generally trade at prices that are lower than their perceived full value.

The Fund may invest cash balances in other investment companies, including government money market funds, and may purchase and sell futures contracts, including equity index futures contracts, to gain market exposure on cash balances in anticipation of liquidity needs. The Fund may seek to earn additional income by lending its securities to certain qualified broker-dealers and institutions.

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Principal Risks

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There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your investment in the Fund. The Fund is not designed for investors who need an assured level of current income and is intended to be a long-term investment. The Fund is not a complete investment program and may not be appropriate for all investors. Investors should carefully consider their own investment goals and risk tolerance before investing in the Fund. The principal risks of investing in the Fund listed below are presented in alphabetical order and not in order of importance or potential exposure. Among other matters, this presentation is intended to facilitate your ability to find particular risks and compare them with the risks of other funds. Each risk summarized below is considered a “principal risk” of investing in the Fund, regardless of the order in which it appears.

Cybersecurity and Operational Risk
Operational risks arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents may negatively impact the Fund and its service providers as well as the ability of shareholders to transact with the Fund. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, shareholder data, or proprietary information, or cause the Fund or its service providers, as well as securities trading venues and their service providers, to suffer data corruption or lose operational functionality. It is not possible for the Fund or its service providers to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.

Dividend Risk
An issuer of stock held by the Fund may choose not to declare a dividend or the dividend rate might not remain at current levels or increase over time. Dividend paying stocks might not experience the same level of earnings growth or capital appreciation as non-dividend paying stocks. Securities that pay dividends may be sensitive to changes in interest rates and, as interest rates rise or fall, the prices of such securities may fall.

Equity Investments Risk
Equity securities are subject to investment risk and market risk. The Fund may invest in the following equity securities, which may expose the Fund to the following additional risks:

■

Common Stock Risk. The value of a company’s common stock may fall as a result of factors affecting the company, companies in the same industry or sector, or the financial markets overall. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company.

■

Depositary Receipts and U.S. Dollar-Denominated Foreign Stocks Traded on U.S. Exchanges Risk. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to, currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity, more volatility, less government regulation and supervision and delays in transaction settlement.

■

Master Limited Partnerships (“MLPs”) Risk. Investing in MLPs involves certain risks related to investing in the underlying assets of the MLPs and risks associated with pooled investment vehicles. Investments held by MLPs may be relatively illiquid, limiting the MLPs’ ability to change their portfolios promptly in response to changes in economic or other conditions. MLPs may have limited financial resources, their securities may trade infrequently and in limited volume, they may be difficult to value, and they may be subject to more abrupt or erratic price movements than securities of larger or more broadly based companies. Holders of units in MLPs have more limited rights to vote on matters affecting the partnership and may be required to sell their common units at an undesirable time or price. The Fund’s investments in MLPs will be limited to no more than 25% of its assets in order for the Fund to meet the requirements necessary to qualify as a “regulated investment company” under the Internal Revenue Code of 1986, as amended (“Internal Revenue Code”).

■

Real Estate Investment Trusts (“REITs”) Risk. Investments in REITs are subject to the risks associated with investing in the real estate industry, including, among other risks: adverse developments affecting the real estate industry; declines in real property values; changes in interest rates; defaults by mortgagors or other borrowers and tenants; lack of availability of mortgage funds or financing; extended vacancies of properties, especially during economic downturns; casualty or condemnation losses; and governmental actions, such as changes to tax laws, zoning regulations or environmental regulations. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. Regardless of where a REIT is organized or traded, its performance may be affected significantly by events in the region where its properties are located. Domestic REITs could be adversely affected by failure to qualify for tax-free “pass-through” of distributed net income and net realized gains under the Internal Revenue Code of 1986, as amended (“Internal Revenue Code”), or to maintain their exemption from registration under the Investment Company Act of 1940, as amended (“Investment Company Act”). REITs typically incur fees that are separate from those incurred by the Fund. Accordingly, the Fund’s investment in

REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs’ operating expenses, in addition to paying Fund expenses. The value of REIT common stock may decline when interest rates rise. REITs tend to be small- to mid-capitalization securities and, as such, are subject to the risks of investing in small- to mid-capitalization securities.

Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets. The Fund’s investment in a foreign issuer may subject the Fund to regulatory, political, currency, security, economic and other risks associated with that country. Global economic and financial markets are becoming increasingly interconnected and conditions (including recent volatility and instability) and events (including natural disasters) in one country, region or financial market may adversely impact issuers in a different country, region or financial market.

Futures Contracts Risk
Futures contracts are derivative instruments pursuant to a contract where the parties agree to a fixed price for an agreed amount of securities or other underlying assets at an agreed date. The use of such derivative instruments may expose the Fund to additional risks, such as credit risk, liquidity risk, and counterparty risk, that it would not be subject to if it invested directly in the securities underlying those derivatives. There can be no assurance that any strategy used will succeed. There may at times be an imperfect correlation between the movement in the prices of futures contracts and the value of their underlying instruments or indexes. There also can be no assurance that, at all times, a liquid market will exist for offsetting a futures contract that the Fund has previously bought or sold, and this may result in the inability to close a futures contract when desired. Futures contracts may experience potentially dramatic price changes, which will increase the volatility of the Fund and may involve a small investment of cash (the amount of initial and variation margin) relative to the magnitude of the risk assumed (the potential increase or decrease in the price of the futures contract). Equity index futures contracts expose the Fund to volatility in an underlying securities index. Use of derivatives is a highly specialized activity that can involve investment techniques and risks different from, and in some respects greater than, those associated with investing in more traditional investments. Derivatives can be highly complex and highly volatile and may perform in unanticipated ways.

Growth Companies Risk
Growth companies are expected to increase their earnings at a certain rate. When these expectations are not met or decrease, the prices of these stocks may decline, sometimes sharply, even if earnings showed an absolute increase. The Fund’s investments in growth companies may be more sensitive to company earnings and more volatile than the market in general primarily because their stock prices are based heavily on future expectations. If an assessment of the prospects for a company’s growth is incorrect, then the price of the company’s stock may fall or not approach the value placed on it. Growth company stocks may also lack the dividend yield that can cushion stock price declines in market downturns.

Interest Rate Risk
The value of investments with interest rate risk, such as income-oriented equity securities that pay dividends, may decline when interest rates rise. Rising interest rates can reduce companies’ profitability and their ability to pay dividends.

Investment Risk
An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. When you sell your shares of the Fund, they could be worth less than what you paid for them. Therefore, you may lose money by investing in the Fund.

Issuer Risk
The value of, and/or the return generated by, a security may decline for a number of reasons that directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets.

Market Risk
The Fund is subject to the risk that the securities markets will move down, sometimes rapidly and unpredictably, based on overall economic conditions and other factors, which may negatively affect the Fund’s performance. Equity securities generally have greater price volatility than fixed income securities, although under certain market conditions fixed income securities may have comparable or greater price volatility. During a general downturn in the securities markets, multiple assets may decline in value simultaneously. Prices in many financial markets have increased significantly over the last decade, but there have also been periods of adverse market and financial developments and cyclical change during that timeframe, which have resulted in unusually high levels of volatility in domestic and foreign financial markets that has caused losses for investors and may occur again in the future. The value of a security may decline due to adverse issuer-specific conditions, general market conditions unrelated to a particular issuer, such as changes in interest or inflation rates, or factors that affect a particular industry or industries. Changes in the financial condition of a single issuer or market segment also can impact the market as a whole. Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, pandemics, public health crises, natural disasters and related events have led, and in the future may continue to lead, to instability in world economies and markets generally and reduced liquidity in equity, credit and fixed-income markets, which may disrupt economies and markets and adversely affect the value of your investment. Changes in value may be temporary or may last for extended periods.

Policy changes by the U.S. government and/or Federal Reserve and political events within the U.S. and abroad, such as changes in the U.S. presidential administration and Congress, the U.S. government’s inability at times to agree on a long-term budget and deficit reduction plan, the threat of a federal government shutdown and threats not to increase the federal government’s debt limit, may affect investor and consumer confidence and may adversely impact financial markets and the broader economy, perhaps suddenly and to a significant degree.

Markets and market participants are increasingly reliant upon both publicly available and proprietary information data systems. Data imprecision, software or other technology malfunctions, programming inaccuracies, unauthorized use or access, and similar circumstances may impair the performance of these systems and may have an adverse impact upon a single issuer, a group of issuers, or the market at large.

The financial markets generally move in cycles, with periods of rising prices followed by periods of declining prices. The value of your investment may reflect these fluctuations.

■

continue to affect the economies of many nations, individual companies and the global securities and commodities markets, including their liquidity, in ways that cannot necessarily be foreseen at the present time. The pandemic has accelerated trends toward working remotely and shopping on-line, which may negatively affect the value of office and commercial real estate and companies that have been slow to transition to an on-line business model and has disrupted the supply chains that many businesses depend on. The travel, hospitality and public transit industries may suffer long-term negative effects from the pandemic and resulting changes to public behavior. Both U.S. and international markets have experienced significant volatility in recent months and years. As a result of such volatility, investment returns may fluctuate significantly. Moreover, the risks discussed herein associated with an investment in the Fund may be increased.

The Federal Reserve has spent hundreds of billions of dollars to keep credit flowing through the economy. However, the Federal Reserve recently began to reduce its interventions as the economy improved and inflation accelerated. Concerns about the markets’ dependence on the Federal Reserve’s provision of liquidity have grown as a result. High public debt in the U.S. and other countries creates ongoing systemic and market risks and policymaking uncertainty, and there may be a further increase in public debt due to the economic effects of the COVID-19 pandemic and ensuing economic relief and public health measures. Governments’ efforts to limit potential negative economic effects of the pandemic may be altered, delayed, or eliminated at inopportune times for political, policy or other reasons.

Interest rates have been unusually low in recent years in the U.S. and abroad, and central banks reduced rates further in an effort to combat the economic effects of the COVID-19 pandemic. Because there is little precedent for this situation, it is difficult to predict the impact on various markets of a significant rate increase or other significant policy changes. The U.S. Federal Reserve has started to raise interest rates, in part to address an increase in the annual inflation rate in the U.S. Over the longer term, rising interest rates may present a greater risk than has historically been the case due to the current period of relatively low rates and the effect of government fiscal and monetary policy initiatives and potential market reaction to those initiatives or their alteration or cessation.

Slowing global economic growth, risks associated with the United Kingdom’s departure from the European Union on December 31, 2020, commonly referred to as “Brexit,” and a trade agreement between the United Kingdom and the European Union, the risks associated with ongoing trade negotiations with China, the possibility of changes to some international trade agreements, tensions, war, or open conflict between nations, such as between Russia and Ukraine, or political or economic dysfunction within some nations that are major producers of oil could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time. Russia’s military invasion of Ukraine beginning in February 2022, the responses and sanctions by the United States and other countries, and the potential for wider conflict have had, and could continue to have, severe adverse effects on regional and global economies and could further increase volatility and uncertainty in the financial markets.

Economists and others have expressed increasing concern about the potential effects of global climate change on property and security values. Certain issuers, industries and regions may be adversely affected by the impacts of climate change, including on the demand for and the development of goods and services and related production costs, and the impacts of legislation, regulation and international accords related to climate change, as well as any indirect consequences of regulation or business trends driven by climate change.

Other Investment Companies Risk
To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund’s direct fees and expenses. To the extent the Fund invests in other investment companies that invest in equity securities, fixed income securities and/or foreign securities, or that track an index, the Fund is subject to the risks associated with the underlying investments held by the investment company or the index fluctuations to which the investment company is subject. The Fund will be subject to the risks associated with investments in those companies, including but not limited to the following:

■	Government Money Market Funds Risk. Investments in government money market funds are subject to interest rate risk, credit risk, and market risk.

Redemption Risk
The Fund may experience periods of high levels of redemptions that could cause the Fund to sell assets at inopportune times or at a loss or depressed value. The sale of assets to meet redemption requests may create net capital gains, which could cause the Fund to have to distribute substantial capital gains. Redemption risk is greater to the extent that one or more investors or intermediaries control a large percentage of investments in the Fund. In addition, redemption risk is heightened during periods of declining or illiquid markets. During periods of heavy redemptions, the Fund may borrow funds through the interfund credit facility or from a bank line of credit, which may increase costs. Heavy redemptions could hurt the Fund’s performance.

Sector Risk
When the Fund focuses its investments in certain sectors of the economy, its performance may be driven largely by sector performance and could fluctuate more widely than if the Fund were invested more evenly across sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. As the Fund’s portfolio changes over time, the Fund’s exposure to a particular sector may become higher or lower.

■

Industrials Sector Risk. The industrials sector includes companies engaged in the construction and engineering industry, machinery, energy, transportation, professional services, aerospace and defense industries. Companies in the industrials sector may be adversely affected by changes in government regulation, world events and economic conditions. In addition, companies in the industrials sector may be adversely affected by environmental damage, product and environmental liability claims, changes in commodity prices and exchange rates, changes in the supply and demand for products and services, and product obsolescence, among other factors.

Securities Lending Risk
To the extent the Fund lends its securities, it may be subject to the following risks: (i) the securities in which the Fund reinvests cash collateral may decrease in value, causing the Fund to incur a loss, or may not perform sufficiently to cover the Fund’s payment to the borrower of a pre-negotiated fee or “rebate” for the use of that cash collateral in connection with the loan; (ii) non-cash collateral may decline in value, resulting in the Fund becoming under-secured; (iii) delays may occur in the recovery of loaned securities from borrowers, which could result in the Fund being unable to vote proxies or settle transactions or cause the Fund to incur increased costs; and (iv) if the borrower becomes subject to insolvency or similar proceedings, the Fund could incur delays in its ability to enforce its rights in its collateral.

Securities Selection Risk
Securities selected for the Fund may not perform to expectations. This could result in the Fund’s underperformance compared to its benchmark index(es), or other funds with similar investment objectives or strategies.

Small-Capitalization Companies Risk
Investing in the securities of small-capitalization companies involves greater risk and the possibility of greater price volatility, which at times can be rapid and unpredictable, than investing in larger-capitalization and more established companies. Since small-capitalization companies may have narrower commercial markets, and more limited operating history, product lines, and managerial and financial resources than larger, more established companies, the securities of these companies may lack sufficient market liquidity and they can be particularly sensitive to changes in overall economic conditions, interest rates, borrowing costs and earnings.

Value Stocks Risk
Value stocks are subject to the risk that their intrinsic or full value may never be realized by the market, that a stock judged to be undervalued may be appropriately priced, or that their prices may decline. Although value stocks tend to be inexpensive relative to their earnings, they can continue to be inexpensive for long periods of time. The Fund’s investments in value stocks seek to limit potential downside price risk over time; however, value stock prices still may decline substantially. In addition, the Fund may produce more modest gains as a trade-off for this potentially lower risk. The Fund’s investment in value stocks could cause the Fund to underperform funds that use a growth or non-value approach to investing or have a broader investment style.

rr_RiskLoseMoney

There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your investment in the Fund.

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

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Fund Performance

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceNarrativeTextBlock

The bar chart and table below provide an indication of risk by showing changes in the Fund’s performance over time. The bar chart shows how the Fund’s performance has varied from year to year. The table shows how the Fund’s average annual total returns compare to a broad-based market index, which is the Fund’s benchmark index, as well as an additional broad-based market index, for the periods indicated. You may obtain updated performance information on the Fund’s website at www.americanbeaconfunds.com. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

rr_PerformanceInformationIllustratesVariabilityOfReturns

rr_PerformanceAvailabilityWebSiteAddress

www.americanbeaconfunds.com

rr_PerformancePastDoesNotIndicateFuture

Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

rr_BarChartHeading

Calendar year total returns for Investor Class Shares. Year Ended 12/31

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableNotRelevantToTaxDeferred

If you are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account (“IRA”) or a 401(k) plan, the after-tax returns do not apply to your situation.

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for Investor Class shares of the Fund; after-tax returns for other share classes will vary.

rr_PerformanceTableExplanationAfterTaxHigher

The return after taxes on distributions and sale of Fund shares may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period.

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Highest Quarterly Return:
18.14%4th Quarter 2020
01/01/2015 through 12/31/2021

Lowest Quarterly Return:
-24.14%1st Quarter 2020
01/01/2015 through 12/31/2021

rr_PerformanceTableHeading

Average annual total returns for periods ended December 31, 2021

(American Beacon Funds) | (American Beacon Bahl & Gaynor Small Cap Growth Fund℠) | Russell 2000® Growth Index (Reflects no deduction for fees, expenses or taxes)

rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The return after taxes on distributions and sale of Fund shares may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period. If you are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account (“IRA”) or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares of the Fund; after-tax returns for other share classes will vary.

rr_ProspectusTable

rr_AverageAnnualReturnYear01

2.83%

rr_AverageAnnualReturnYear05

14.53%

(American Beacon Funds) | (American Beacon Bahl & Gaynor Small Cap Growth Fund℠) | Russell 2000® Index (Reflects no deduction for fees, expenses or taxes)

rr_AverageAnnualReturnSinceInception

11.97%

rr_ProspectusTable

rr_AverageAnnualReturnYear01

14.82%

rr_AverageAnnualReturnYear05

12.02%

(American Beacon Funds) | (American Beacon Bahl & Gaynor Small Cap Growth Fund℠) | A Class

rr_AverageAnnualReturnSinceInception

10.64%

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

rr_MaximumDeferredSalesChargeOverOther

0.50%

^[1]

rr_ManagementFeesOverAssets

0.88%

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.56%

rr_ExpensesOverAssets

1.69%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.37%)

^[2]

rr_NetExpensesOverAssets

1.32%

rr_ExpenseExampleYear01

$ 702

rr_ExpenseExampleYear03

1,043

rr_ExpenseExampleYear05

1,407

rr_ExpenseExampleYear10

$ 2,429

rr_AverageAnnualReturnYear01

8.78%

rr_AverageAnnualReturnYear05

8.69%

rr_AverageAnnualReturnSinceInception

9.50%

(American Beacon Funds) | (American Beacon Bahl & Gaynor Small Cap Growth Fund℠) | C Class

rr_AverageAnnualReturnInceptionDate

Jul. 15, 2014

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

1.00%

rr_ManagementFeesOverAssets

0.88%

rr_DistributionAndService12b1FeesOverAssets

1.00%

rr_OtherExpensesOverAssets

0.61%

rr_ExpensesOverAssets

2.49%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.37%)

^[2]

rr_NetExpensesOverAssets

2.12%

rr_ExpenseExampleYear01

$ 315

rr_ExpenseExampleYear03

740

rr_ExpenseExampleYear05

1,292

rr_ExpenseExampleYear10

2,798

rr_ExpenseExampleNoRedemptionYear01

215

rr_ExpenseExampleNoRedemptionYear03

740

rr_ExpenseExampleNoRedemptionYear05

1,292

rr_ExpenseExampleNoRedemptionYear10

$ 2,798

rr_AverageAnnualReturnYear01

13.44%

rr_AverageAnnualReturnYear05

9.17%

rr_AverageAnnualReturnSinceInception

9.54%

(American Beacon Funds) | (American Beacon Bahl & Gaynor Small Cap Growth Fund℠) | Y Class

rr_AverageAnnualReturnInceptionDate

Jul. 15, 2014

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.88%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.58%

rr_ExpensesOverAssets

1.46%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.38%)

^[2]

rr_NetExpensesOverAssets

1.08%

rr_ExpenseExampleYear01

$ 110

rr_ExpenseExampleYear03

424

rr_ExpenseExampleYear05

761

rr_ExpenseExampleYear10

$ 1,714

rr_AverageAnnualReturnYear01

15.69%

rr_AverageAnnualReturnYear05

10.30%

rr_AverageAnnualReturnSinceInception

10.71%

(American Beacon Funds) | (American Beacon Bahl & Gaynor Small Cap Growth Fund℠) | R5 Class

rr_AverageAnnualReturnInceptionDate

Jul. 15, 2014

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.88%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.52%

rr_ExpensesOverAssets

1.40%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.42%)

^[2]

rr_NetExpensesOverAssets

0.98%

rr_ExpenseExampleYear01

$ 100

rr_ExpenseExampleYear03

402

rr_ExpenseExampleYear05

726

rr_ExpenseExampleYear10

$ 1,643

rr_AverageAnnualReturnYear01

15.77%

rr_AverageAnnualReturnYear05

10.42%

rr_AverageAnnualReturnSinceInception

10.81%

(American Beacon Funds) | (American Beacon Bahl & Gaynor Small Cap Growth Fund℠) | Investor Class

rr_AverageAnnualReturnInceptionDate

Jul. 15, 2014

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.88%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.89%

rr_ExpensesOverAssets

1.77%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.41%)

^[2]

rr_NetExpensesOverAssets

1.36%

rr_ExpenseExampleYear01

$ 138

rr_ExpenseExampleYear03

517

rr_ExpenseExampleYear05

921

rr_ExpenseExampleYear10

$ 2,050

rr_AnnualReturn2015

(3.25%)

rr_AnnualReturn2016

25.31%

rr_AnnualReturn2017

13.23%

rr_AnnualReturn2018

(11.64%)

rr_AnnualReturn2019

24.99%

rr_AnnualReturn2020

11.91%

rr_AnnualReturn2021

15.35%

rr_HighestQuarterlyReturnLabel

Highest Quarterly Return:18.14%4th Quarter 202001/01/2015 through 12/31/2021

rr_BarChartHighestQuarterlyReturn

18.14%

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2020

rr_LowestQuarterlyReturnLabel

Lowest Quarterly Return:-24.14%1st Quarter 202001/01/2015 through 12/31/2021

rr_BarChartLowestQuarterlyReturn

(24.14%)

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

rr_AverageAnnualReturnYear01

15.35%

rr_AverageAnnualReturnYear05

10.05%

rr_AverageAnnualReturnSinceInception

10.42%

(American Beacon Funds) | (American Beacon Bahl & Gaynor Small Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions

rr_AverageAnnualReturnInceptionDate

Jul. 15, 2014

rr_ProspectusTable

rr_AverageAnnualReturnYear01

13.58%

rr_AverageAnnualReturnYear05

9.14%

(American Beacon Funds) | (American Beacon Bahl & Gaynor Small Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares

rr_AverageAnnualReturnSinceInception

9.72%

rr_ProspectusTable

rr_AverageAnnualReturnYear01

10.31%

rr_AverageAnnualReturnYear05

7.81%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Growth Fund℠)

rr_AverageAnnualReturnSinceInception

8.32%

rr_ProspectusTable

rr_ObjectiveHeading

Investment Objective

rr_ObjectivePrimaryTextBlock

The Fund seeks long-term total return on capital, primarily through capital appreciation.

rr_ExpenseHeading

Fees and Expenses of the Fund

rr_ExpenseNarrativeTextBlock

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointDiscounts

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_OperatingExpensesCaption

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

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2023

rr_ExpensesDeferredChargesTextBlock

rr_ExpenseExampleHeading

Example

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNarrativeTextBlock

rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption of shares:

rr_PortfolioTurnoverHeading

Portfolio Turnover

rr_PortfolioTurnoverTextBlock

rr_PortfolioTurnoverRate

57.00%

rr_StrategyHeading

Principal Investment Strategies

rr_StrategyNarrativeTextBlock

The Fund invests in a diversified portfolio of large capitalization companies that are listed on the New York Stock Exchange, NYSE American, or Nasdaq. Under normal circumstances, the Fund invests at least 80% of its net assets (plus borrowings for investment purposes) in stocks from among those in the large-cap growth category at the time of purchase. For purposes of the Fund’s investments, “large-cap stocks” are stocks of companies whose market capitalization falls within the range of the Russell 1000^® Index at the time of investment. The Russell 1000 Index is an unmanaged, market value weighted index, which measures performance of approximately 1,000 of the largest companies in the U.S. equity market. The Russell 1000 Index is reconstituted from time to time. The market capitalization range for the Russell 1000 Index was $477.3 million to $2.7 trillion as of February 28, 2022.

Growth stocks are those that the Fund’s sub-advisor, Bridgeway Capital Management, LLC (“Bridgeway Capital”), believes have above average prospects for economic growth. Generally, these are stocks represented in the Russell 1000^® Growth Index, but may also include stocks of other companies with similar “growth” characteristics whose market capitalizations are within the range of the Russell 1000 Index. In order to diversify the Fund’s investments, the Fund’s sub-advisor allocates up to 10% of the Fund’s assets to value stocks. Generally these are stocks represented in the Russell 1000 Value Index, but may also include stocks of other companies with similar “value” characteristics whose market capitalizations are within the range of the Russell 1000 Index. The Russell 1000 Growth Index includes those Russell 1000 companies with higher price-to-book ratios and higher forecasted growth values. The Russell 1000 Value Index includes those Russell 1000 companies with lower price-to-book ratios and lower forecasted growth values.

The Fund’s investments may include common stocks, real estate investment trusts (“REITs”), and dollar-denominated foreign stocks traded on U.S. exchanges (collectively referred to as “stocks”). The Fund also may invest in stocks of mid-capitalization companies.

Bridgeway Capital uses a proprietary model-driven quantitative approach to select stocks within the large-cap growth category. Bridgeway Capital will not necessarily sell a stock if it “migrates” outside the market capitalization range of the Russell 1000 Index after purchase. As a result, due to such “migration” or other market movements, the Fund may have less than 80% of its assets in large-cap stocks at any point in time. Based on statistically driven rules, securities are sold when the reasons for selecting the stock are no longer valid or when necessary to maintain the risk profile of the overall Fund.

Bridgeway Capital’s investment process incorporates material environmental, social, and/or governance (“ESG”) information as a consideration in the assessment of all potential portfolio securities. Bridgeway Capital uses ESG research and/or ratings information provided by third parties in performing this analysis and considering ESG risks. As with any consideration used in assessing portfolio securities, Bridgeway Capital may, at times, utilize ESG information to increase the weighting of an issuer with a good ESG record and/or decrease the weighting of an issuer with a poor ESG record. Additionally, Bridgeway Capital generally prohibits investments in companies that, based on Bridgeway Capital’s judgment, are involved more than minimally in: (1) Sudan operations, (2) tobacco, or (3) adult entertainment.

Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning to reflect its benchmark index, the Fund may have significant positions in particular sectors, including the Information Technology sector. However, as the sector composition of the Fund’s portfolio changes over time, the Fund’s exposure to the Information Technology sector may be lower at a future date, and the Fund’s exposure to other market sectors may be higher.

While the Fund is actively managed for long-term total return, Bridgeway Capital seeks to minimize capital gain distributions as part of a tax management strategy. The successful application of this method is intended to result in a more tax-efficient fund than would otherwise be the case, but this method will not be solely determinative in any investment decision made by Bridgeway Capital.

The Fund may also invest cash balances in other investment companies, including government money market funds, and may purchase and sell futures contracts, including equity index futures contracts, to gain market exposure on cash balances or reduce market exposure in anticipation of liquidity needs. The Fund may seek to earn additional income by lending its securities to certain qualified broker-dealers and institutions.

rr_RiskHeading

Principal Risks

rr_RiskNarrativeTextBlock

Environmental, Social, and/or Governance Investing Risk
The use of environmental, social, and/or governance (“ESG”) considerations by the sub-advisor may cause the Fund to make different investments than funds that have a similar investment style but do not incorporate such considerations in their strategy. As with the use of any investment considerations involved in investment decisions, there is no guarantee that the use of any ESG investment considerations will result in the selection of issuers that will outperform other issuers or help reduce risk in the Fund. The Fund may choose not to, or may not be able to, take advantage of certain investment opportunities due to these considerations, which may adversely affect investment performance. The Fund may underperform funds that do not incorporate these considerations.

■

U.S. Dollar-Denominated Foreign Stocks Traded on U.S. Exchanges Risk. U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to, currency exchange rate fluctuations, political and financial instability in the home country of a particular foreign stock, less liquidity, more volatility, less government regulation and supervision and delays in transaction settlement.

Large-Capitalization Companies Risk
The securities of large market capitalization companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and, at times, such companies may be out of favor with investors. Many larger-capitalization companies also may be unable to attain the high growth rates of successful smaller companies, especially during periods of economic expansion.

events have led, and in the future may continue to lead, to instability in world economies and markets generally and reduced liquidity in equity, credit and fixed-income markets, which may disrupt economies and markets and adversely affect the value of your investment. Changes in value may be temporary or may last for extended periods.

The financial markets generally move in cycles, with periods of rising prices followed by periods of declining prices. The value of your investment may reflect these fluctuations.

■

Recent Market Events Risk. An outbreak of infectious respiratory illness caused by a novel coronavirus, known as COVID-19, was first detected in late 2019 and has subsequently spread globally. The transmission of COVID-19 and efforts to contain its spread have resulted, and may continue to result, in significant disruptions to business operations, widespread business closures and layoffs, travel restrictions and closed borders, prolonged quarantines and stay-at-home orders, disruption of and delays in healthcare service preparation and delivery, service and event changes, and lower consumer demand, as well as general concern and uncertainty that has negatively affected the global economy. The impact of the pandemic has negatively affected and may continue to affect the economies of many nations, individual companies and the global securities and commodities markets, including their liquidity, in ways that cannot necessarily be foreseen at the present time. The pandemic has accelerated trends toward working remotely and shopping on-line, which may negatively affect the value of office and commercial real estate and companies that have been slow to transition to an on-line business model and has disrupted the supply chains that many businesses depend on. The travel, hospitality and public transit industries may suffer long-term negative effects from the pandemic and resulting changes to public behavior. Both U.S. and international markets have experienced significant volatility in recent months and years. As a result of such volatility, investment returns may fluctuate significantly. Moreover, the risks discussed herein associated with an investment in the Fund may be increased.

Mid-Capitalization Companies Risk
Investing in the securities of mid-capitalization companies involves greater risk and the possibility of greater price volatility, which at times can be rapid and unpredictable, than investing in larger-capitalization and more established companies. Since mid-capitalization companies may have narrower commercial markets and more limited operating history, product lines, and managerial and financial resources than larger, more established companies, the securities of these companies may lack sufficient market liquidity, and they can be particularly sensitive to changes in overall economic conditions, interest rates, borrowing costs and earnings.

Model and Data/Programming Error Risk
The success of the sub-advisor’s investment strategy depends largely on the effectiveness of its quantitative research models and investment programs. Models (including quantitative models), data, and investment programs are used to screen potential investments for the Fund. When models or data prove to be incorrect or incomplete, any decisions made in reliance thereon expose the Fund to potential risks and programs may not react as expected to market events, resulting in losses for the Fund. Some of the models used by the sub-advisor are predictive in nature. The use of predictive models has inherent risks. Because predictive models are usually constructed based on historical data supplied by third parties, the success of relying on such models may depend heavily on the accuracy and reliability of the supplied historical data. There is no assurance that the models are complete or accurate, or representative of future market cycles, nor will they always be beneficial to the Fund if they are accurate. Additionally, programs may become outdated or experience malfunctions which may not be identified by the sub-advisor and therefore may also result in losses to the Fund. These models and programs may negatively affect Fund performance for various other reasons, including human judgment, inaccuracy of historical data and non-quantitative factors (such as market or trading system dysfunctions, investor fear or overreaction).

securities, fixed income securities and/or foreign securities, or that track an index, the Fund is subject to the risks associated with the underlying investments held by the investment company or the index fluctuations to which the investment company is subject. The Fund will be subject to the risks associated with investments in those companies, including but not limited to the following:

■	Government Money Market Funds Risk. Investments in government money market funds are subject to interest rate risk, credit risk, and market risk.

Quantitative Strategy Risk
The success of the Fund’s investment strategy may depend in part on the effectiveness of the sub-advisor’s quantitative tools for screening securities. These strategies may incorporate factors that are not predictive of a security’s value. The quantitative tools may not react as expected to market events, resulting in losses for the Fund. Additionally, a previously successful strategy may become outdated or inaccurate, which may not be identified by the sub-advisor and therefore may also result in losses.

■

Information Technology Sector Risk. The information technology sector includes companies engaged in internet software and services, technology hardware and storage peripherals, electronic equipment and components, and semiconductors and semiconductor equipment. Information technology companies face intense competition, both domestically and internationally, which may have an adverse effect on profit margins. Information technology companies may have limited product lines, markets, financial resources or personnel. The products of information technology companies may face rapid product obsolescence due to technological developments and frequent new product introduction, unpredictable changes in growth rates and competition for the services of qualified personnel. Failure to introduce new products, develop and maintain a loyal customer base or achieve general market acceptance for their products could have a material adverse effect on a company’s business. Companies in the information technology sector are heavily dependent on intellectual property and the loss of patent, copyright or trademark protections may adversely affect the profitability of these companies. The market prices of information technology-related securities tend to exhibit a greater degree of market risk and sharp price fluctuations than other types of securities. These securities may fall in and out of favor with investors rapidly, which may cause sudden selling and dramatically lower market prices.

Tax Management Risk
The Fund’s tax management strategies may result in it forgoing performance in favor of tax benefits that may not materialize, or may result in pre-tax performance that is lower than that of funds that do not use tax-management strategies.

rr_RiskLoseMoney

There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your investment in the Fund.

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceNarrativeTextBlock

On February 5, 2016, the Fund acquired all the assets and assumed all the liabilities of the Fund’s predecessor. In connection with that reorganization, the R5 Class shares of the Fund adopted the performance history and financial statements of the Fund’s predecessor. In the bar chart and table below, the performance of the Fund’s R5 Class shares for periods prior to February 5, 2016 is the performance of the Fund’s predecessor. In the table below, the performance of the Fund’s A Class, C Class, Y Class, and Investor Class shares for periods prior to February 5, 2016 also represents the returns of the Fund’s predecessor. In the table below, the performance for the R6 Class shares for periods prior to April 30, 2018 represents the returns achieved by the Fund’s predecessor from January 1, 2012 through February 4, 2016 and the performance of the Fund’s R5 Class from February 5, 2016 through April 29, 2018. In each case, the newer share classes would have had similar annual returns to the Fund’s predecessor because the shares of each class represent investments in the same portfolio securities. However, the older share class had different expenses than the newer share classes, which would affect performance. The performance of the newer share classes shown in the table has not been adjusted for differences in operating expenses between those share classes and the shares of the Fund’s predecessor, but the A Class and C Class shares performance has been adjusted for the impact of the maximum applicable sales charge. You may obtain updated performance information on the Fund’s website at www.americanbeaconfunds.com. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

rr_PerformanceInformationIllustratesVariabilityOfReturns

rr_PerformanceAvailabilityWebSiteAddress

www.americanbeaconfunds.com

rr_PerformancePastDoesNotIndicateFuture

Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

rr_BarChartHeading

Calendar year total returns for R5 Class Shares. Year Ended 12/31

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableNotRelevantToTaxDeferred

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for the R5 Class shares of the Fund; after-tax returns for other share classes will vary.

rr_PerformanceTableExplanationAfterTaxHigher

rr_BarChartClosingTextBlock

Highest Quarterly Return:
30.01%2nd Quarter 2020
01/01/2012 through 12/31/2021

Lowest Quarterly Return:
-18.37%4th Quarter 2018
01/01/2012 through 12/31/2021

rr_PerformanceTableHeading

Average annual total returns for periods ended December 31, 2021

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Growth Fund℠) | Russell 1000® Growth Index (Reflects no deduction for fees, expenses or taxes)

rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The return after taxes on distributions and sale of Fund shares may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period. If you are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account (“IRA”) or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for the R5 Class shares of the Fund; after-tax returns for other share classes will vary.

rr_ProspectusTable

rr_AverageAnnualReturnYear01

27.60%

rr_AverageAnnualReturnYear05

25.32%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Growth Fund℠) | A Class

rr_AverageAnnualReturnYear10

19.79%

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

rr_MaximumDeferredSalesChargeOverOther

0.50%

^[3]

rr_ManagementFeesOverAssets

0.75%

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.21%

^[4]

rr_ExpensesOverAssets

1.21%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.12%)

^[5]

rr_NetExpensesOverAssets

1.09%

rr_ExpenseExampleYear01

$ 680

rr_ExpenseExampleYear03

926

rr_ExpenseExampleYear05

1,191

rr_ExpenseExampleYear10

$ 1,947

rr_AverageAnnualReturnYear01

14.49%

rr_AverageAnnualReturnYear05

18.79%

rr_AverageAnnualReturnYear10

17.17%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Growth Fund℠) | C Class

rr_AverageAnnualReturnInceptionDate

Feb. 05, 2016

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

1.00%

rr_ManagementFeesOverAssets

0.75%

rr_DistributionAndService12b1FeesOverAssets

1.00%

rr_OtherExpensesOverAssets

0.20%

^[4]

rr_ExpensesOverAssets

1.95%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.12%)

^[5]

rr_NetExpensesOverAssets

1.83%

rr_ExpenseExampleYear01

$ 286

rr_ExpenseExampleYear03

601

rr_ExpenseExampleYear05

1,041

rr_ExpenseExampleYear10

2,265

rr_ExpenseExampleNoRedemptionYear01

186

rr_ExpenseExampleNoRedemptionYear03

601

rr_ExpenseExampleNoRedemptionYear05

1,041

rr_ExpenseExampleNoRedemptionYear10

$ 2,265

rr_AverageAnnualReturnYear01

19.58%

rr_AverageAnnualReturnYear05

19.30%

rr_AverageAnnualReturnYear10

17.34%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Growth Fund℠) | Y Class

rr_AverageAnnualReturnInceptionDate

Feb. 05, 2016

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.75%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.20%

^[4]

rr_ExpensesOverAssets

0.95%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.12%)

^[5]

rr_NetExpensesOverAssets

0.83%

rr_ExpenseExampleYear01

$ 85

rr_ExpenseExampleYear03

291

rr_ExpenseExampleYear05

514

rr_ExpenseExampleYear10

$ 1,155

rr_AverageAnnualReturnYear01

21.77%

rr_AverageAnnualReturnYear05

20.50%

rr_AverageAnnualReturnYear10

18.05%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Growth Fund℠) | R6 Class

rr_AverageAnnualReturnInceptionDate

Feb. 05, 2016

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.75%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.13%

^[4]

rr_ExpensesOverAssets

0.88%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.12%)

^[5]

rr_NetExpensesOverAssets

0.76%

rr_ExpenseExampleYear01

$ 78

rr_ExpenseExampleYear03

269

rr_ExpenseExampleYear05

476

rr_ExpenseExampleYear10

$ 1,073

rr_AverageAnnualReturnYear01

21.90%

rr_AverageAnnualReturnYear05

20.65%

rr_AverageAnnualReturnYear10

18.13%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Growth Fund℠) | R5 Class

rr_AverageAnnualReturnInceptionDate

Apr. 30, 2018

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.75%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.17%

^[4]

rr_ExpensesOverAssets

0.92%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.12%)

^[5]

rr_NetExpensesOverAssets

0.80%

rr_ExpenseExampleYear01

$ 82

rr_ExpenseExampleYear03

281

rr_ExpenseExampleYear05

498

rr_ExpenseExampleYear10

$ 1,120

rr_AnnualReturn2012

16.21%

rr_AnnualReturn2013

37.19%

rr_AnnualReturn2014

18.66%

rr_AnnualReturn2015

3.62%

rr_AnnualReturn2016

5.60%

rr_AnnualReturn2017

27.21%

rr_AnnualReturn2018

(5.99%)

rr_AnnualReturn2019

30.18%

rr_AnnualReturn2020

34.48%

rr_AnnualReturn2021

21.82%

rr_HighestQuarterlyReturnLabel

Highest Quarterly Return:30.01%2nd Quarter 202001/01/2012 through 12/31/2021

rr_BarChartHighestQuarterlyReturn

30.01%

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2020

rr_LowestQuarterlyReturnLabel

Lowest Quarterly Return:-18.37%4th Quarter 201801/01/2012 through 12/31/2021

rr_BarChartLowestQuarterlyReturn

(18.37%)

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2018

rr_AverageAnnualReturnYear01

21.82%

rr_AverageAnnualReturnYear05

20.59%

rr_AverageAnnualReturnYear10

18.10%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Growth Fund℠) | R5 Class | Returns After Taxes on Distributions

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2003

rr_ProspectusTable

rr_AverageAnnualReturnYear01

16.74%

rr_AverageAnnualReturnYear05

17.45%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Growth Fund℠) | R5 Class | Returns After Taxes on Distributions and Sales of Fund Shares

rr_AverageAnnualReturnYear10

16.47%

rr_ProspectusTable

rr_AverageAnnualReturnYear01

16.07%

rr_AverageAnnualReturnYear05

15.95%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Growth Fund℠) | Investor Class

rr_AverageAnnualReturnYear10

15.06%

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.75%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.49%

^[4]

rr_ExpensesOverAssets

1.24%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.12%)

^[5]

rr_NetExpensesOverAssets

1.12%

rr_ExpenseExampleYear01

$ 114

rr_ExpenseExampleYear03

382

rr_ExpenseExampleYear05

669

rr_ExpenseExampleYear10

$ 1,489

rr_AverageAnnualReturnYear01

21.48%

rr_AverageAnnualReturnYear05

20.17%

rr_AverageAnnualReturnYear10

17.85%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Value Fund℠)

rr_AverageAnnualReturnInceptionDate

Feb. 05, 2016

rr_ProspectusTable

rr_ObjectiveHeading

Investment Objective

rr_ObjectivePrimaryTextBlock

The Fund seeks to provide long-term total return on capital, primarily through capital appreciation and some income.

rr_ExpenseHeading

Fees and Expenses of the Fund

rr_ExpenseNarrativeTextBlock

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointDiscounts

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

rr_OperatingExpensesCaption

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

rr_ExpensesDeferredChargesTextBlock

rr_ExpenseExampleHeading

Example

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption of shares:

rr_PortfolioTurnoverHeading

Portfolio Turnover

rr_PortfolioTurnoverTextBlock

rr_PortfolioTurnoverRate

51.00%

rr_StrategyHeading

Principal Investment Strategies

rr_StrategyNarrativeTextBlock

The Fund invests in a diversified portfolio of stocks of large capitalization companies that are listed on the New York Stock Exchange, NYSE American, or Nasdaq. Under normal market conditions, at least 80% of Fund net assets (plus borrowings for investment purposes) are invested in stocks from among those in the large-cap value category at the time of purchase. For purposes of the Fund’s investment portfolio, “large-cap stocks” are those whose market capitalization (stock market worth) falls within the range of the Russell 1000^® Index at the time of investment. The Russell 1000 Index measures the performance of the 1,000 largest U.S. companies based on total market capitalization. As of February 28, 2022, the market capitalizations of the companies in the Russell 1000 Index ranged from $477.3 million to $2.7 trillion.

The Fund’s sub-advisor, Bridgeway Capital Management, LLC (“Bridgeway Capital”), uses a proprietary model-driven quantitative approach to selects stocks within the large-cap value category for the Fund. Value stocks are those Bridgeway Capital believes are priced cheaply relative to some financial measures of worth, such as the ratio of price to earnings, price to sales, or price to cash flow. Generally, these are stocks represented in the Russell 1000^® Value Index, plus large capitalization stocks with similar “value” characteristics. The Russell 1000 Value Index includes those Russell 1000 companies with lower price-to-book ratios and lower forecasted growth values. Based on statistically driven rules, securities are sold when the reasons for selecting the stock are no longer valid or when necessary to maintain the risk profile of the overall Fund. Bridgeway Capital will not necessarily sell a stock if it “migrates” outside the market capitalization range of the Russell 1000 Index after purchase. As a result, due to such “migration” or other market movements, the Fund may have less than 80% of its assets in large-cap stocks at any point in time.

The Fund’s investments may include common stocks, real estate investment trusts (“REITs”), and U.S. dollar-denominated foreign stocks traded on U.S. exchanges (collectively referred to as “stocks”). The Fund also may invest in stocks of mid-capitalization companies.

While the Fund is actively managed for long-term total return, Bridgeway Capital seeks to minimize capital gains distributions as part of a tax management strategy. The successful application of this method is intended to result in a more tax-efficient fund than would otherwise be the case, but this method will not be solely determinative in any investment decision made by Bridgeway Capital.

Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning to reflect its benchmark index, the Fund may have significant positions in particular sectors, including the Financials sector. However, as the sector composition of the Fund’s portfolio changes over time, the Fund’s exposure to the Financials sector may be lower at a future date, and the Fund’s exposure to other market sectors may be higher.

rr_RiskHeading

Principal Risks

rr_RiskNarrativeTextBlock

■

The financial markets generally move in cycles, with periods of rising prices followed by periods of declining prices. The value of your investment may reflect these fluctuations.

■

the pandemic and resulting changes to public behavior. Both U.S. and international markets have experienced significant volatility in recent months and years. As a result of such volatility, investment returns may fluctuate significantly. Moreover, the risks discussed herein associated with an investment in the Fund may be increased.

■	Government Money Market Funds Risk. Investments in government money market funds are subject to interest rate risk, credit risk, and market risk.

■

Financials Sector Risk. Financial services companies are subject to extensive governmental regulation, which may limit both the amounts and types of loans and other financial commitments they can make, the interest rates and fees they can charge, the scope of their activities, the prices they can charge and the amount of capital they must maintain. Profitability is largely dependent on the availability and cost of capital funds and can fluctuate significantly when

interest rates change or due to increased competition. In addition, deterioration of the credit markets generally may cause an adverse impact in a broad range of markets, including U.S. and international credit and interbank money markets generally, thereby affecting a wide range of financial institutions and markets. Certain events in the Financials sector may cause an unusually high degree of volatility in the financial markets, both domestic and foreign, and cause certain financial services companies to incur large losses. Securities of financial services companies may experience a dramatic decline in value when such companies experience substantial declines in the valuations of their assets, take action to raise capital (such as the issuance of debt or equity securities), or cease operations.

rr_RiskLoseMoney

There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your investment in the Fund.

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceNarrativeTextBlock

On February 3, 2012, the Fund acquired all the assets and assumed all the liabilities of the Fund’s predecessor. In connection with that reorganization, the R5 Class shares of the Fund adopted the performance history and financial statements of the Class N shares of the Fund’s predecessor. In the bar chart and table below, the performance of the Fund’s Investor Class shares for periods prior to February 3, 2012 is the performance of the Class N shares of the Fund’s predecessor. In the table below, the performance of the Fund’s A Class, C Class and Y Class shares for periods prior to February 3, 2012 also represents the returns of the Class N shares of the Fund’s predecessor. In the table below, the performance for the R6 Class shares for periods prior to April 28, 2017 represents the returns achieved by the Class N shares of the Fund’s predecessor from January 1, 2012 through February 2, 2012 and the performance of the Fund’s Investor Class from February 3, 2012 through April 27, 2017. In each case, the newer share classes would have had similar annual returns to the older share classes because the shares of each class represent investments in the same portfolio securities. However, the older share classes had different expenses than the newer share classes, which would affect performance. The performance of the newer share classes shown in the bar chart and table has not been adjusted for differences in operating expenses between those share classes and the older share classes, but the A Class and C Class shares performance has been adjusted for the impact of the maximum applicable sales charge. You may obtain updated performance information on the Fund’s website at www.americanbeaconfunds.com. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

rr_PerformanceInformationIllustratesVariabilityOfReturns

rr_PerformanceAvailabilityWebSiteAddress

www.americanbeaconfunds.com

rr_PerformancePastDoesNotIndicateFuture

Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

rr_BarChartHeading

Calendar year total returns for Investor Class Shares. Year Ended 12/31

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableNotRelevantToTaxDeferred

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for Investor Class shares of the Fund; after-tax returns for other share classes will vary.

rr_PerformanceTableExplanationAfterTaxHigher

rr_BarChartClosingTextBlock

Highest Quarterly Return:
17.17%2nd Quarter 2020
01/01/2012 through 12/31/2021

Lowest Quarterly Return:
-31.76%1st Quarter 2020
01/01/2012 through 12/31/2021

rr_PerformanceTableHeading

Average annual total returns for periods ended December 31, 2021

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Value Fund℠) | Russell 1000® Value Index (Reflects no deduction for fees, expenses or taxes)

rr_PerformanceTableClosingTextBlock

rr_ProspectusTable

rr_AverageAnnualReturnYear01

25.16%

rr_AverageAnnualReturnYear05

11.16%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Value Fund℠) | A Class

rr_AverageAnnualReturnYear10

12.97%

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

rr_MaximumDeferredSalesChargeOverOther

0.50%

^[6]

rr_ManagementFeesOverAssets

0.68%

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.15%

rr_ExpensesOverAssets

1.08%

rr_ExpenseExampleYear01

$ 679

rr_ExpenseExampleYear03

899

rr_ExpenseExampleYear05

1,136

rr_ExpenseExampleYear10

$ 1,816

rr_AverageAnnualReturnYear01

15.47%

rr_AverageAnnualReturnYear05

6.77%

rr_AverageAnnualReturnYear10

11.23%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Value Fund℠) | C Class

rr_AverageAnnualReturnInceptionDate

Feb. 03, 2012

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

1.00%

rr_ManagementFeesOverAssets

0.68%

rr_DistributionAndService12b1FeesOverAssets

1.00%

rr_OtherExpensesOverAssets

0.16%

rr_ExpensesOverAssets

1.84%

rr_ExpenseExampleYear01

$ 287

rr_ExpenseExampleYear03

579

rr_ExpenseExampleYear05

996

rr_ExpenseExampleYear10

2,159

rr_ExpenseExampleNoRedemptionYear01

187

rr_ExpenseExampleNoRedemptionYear03

579

rr_ExpenseExampleNoRedemptionYear05

996

rr_ExpenseExampleNoRedemptionYear10

$ 2,159

rr_AverageAnnualReturnYear01

20.58%

rr_AverageAnnualReturnYear05

7.25%

rr_AverageAnnualReturnYear10

11.09%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Value Fund℠) | Y Class

rr_AverageAnnualReturnInceptionDate

Feb. 03, 2012

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.68%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.14%

rr_ExpensesOverAssets

0.82%

rr_ExpenseExampleYear01

$ 84

rr_ExpenseExampleYear03

262

rr_ExpenseExampleYear05

455

rr_ExpenseExampleYear10

$ 1,014

rr_AverageAnnualReturnYear01

22.84%

rr_AverageAnnualReturnYear05

8.35%

rr_AverageAnnualReturnYear10

12.24%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Value Fund℠) | R6 Class

rr_AverageAnnualReturnInceptionDate

Feb. 03, 2012

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.68%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.04%

rr_ExpensesOverAssets

0.72%

rr_ExpenseExampleYear01

$ 74

rr_ExpenseExampleYear03

230

rr_ExpenseExampleYear05

401

rr_ExpenseExampleYear10

$ 894

rr_AverageAnnualReturnYear01

22.99%

rr_AverageAnnualReturnYear05

8.44%

rr_AverageAnnualReturnYear10

12.33%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Value Fund℠) | R5 Class

rr_AverageAnnualReturnInceptionDate

Apr. 28, 2017

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.68%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.07%

rr_ExpensesOverAssets

0.75%

rr_ExpenseExampleYear01

$ 77

rr_ExpenseExampleYear03

240

rr_ExpenseExampleYear05

417

rr_ExpenseExampleYear10

$ 930

rr_AverageAnnualReturnYear01

22.88%

rr_AverageAnnualReturnYear05

8.42%

rr_AverageAnnualReturnYear10

12.32%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Value Fund℠) | Investor Class

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2003

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.68%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.40%

rr_ExpensesOverAssets

1.08%

rr_ExpenseExampleYear01

$ 110

rr_ExpenseExampleYear03

343

rr_ExpenseExampleYear05

595

rr_ExpenseExampleYear10

$ 1,317

rr_AnnualReturn2012

17.68%

rr_AnnualReturn2013

37.28%

rr_AnnualReturn2014

13.89%

rr_AnnualReturn2015

(1.51%)

rr_AnnualReturn2016

15.81%

rr_AnnualReturn2017

15.52%

rr_AnnualReturn2018

(13.56%)

rr_AnnualReturn2019

24.68%

rr_AnnualReturn2020

(3.36%)

rr_AnnualReturn2021

22.51%

rr_HighestQuarterlyReturnLabel

Highest Quarterly Return:17.17%2nd Quarter 202001/01/2012 through 12/31/2021

rr_BarChartHighestQuarterlyReturn

17.17%

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2020

rr_LowestQuarterlyReturnLabel

Lowest Quarterly Return:-31.76%1st Quarter 202001/01/2012 through 12/31/2021

rr_BarChartLowestQuarterlyReturn

(31.76%)

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

rr_AverageAnnualReturnYear01

22.51%

rr_AverageAnnualReturnYear05

8.07%

rr_AverageAnnualReturnYear10

11.95%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Value Fund℠) | Investor Class | Returns After Taxes on Distributions

rr_AverageAnnualReturnInceptionDate

Feb. 03, 2012

rr_ProspectusTable

rr_AverageAnnualReturnYear01

19.03%

rr_AverageAnnualReturnYear05

6.06%

(American Beacon Funds) | (American Beacon Bridgeway Large Cap Value Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares

rr_AverageAnnualReturnYear10

10.66%

rr_ProspectusTable

rr_AverageAnnualReturnYear01

14.14%

rr_AverageAnnualReturnYear05

5.92%

(American Beacon Funds) | (American Beacon Stephens Mid-Cap Growth Fund℠)

rr_AverageAnnualReturnYear10

9.67%

rr_ProspectusTable

rr_ObjectiveHeading

Investment Objective

rr_ObjectivePrimaryTextBlock

The Fund seeks long-term growth of capital.

rr_ExpenseHeading

Fees and Expenses of the Fund

rr_ExpenseNarrativeTextBlock

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointDiscounts

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_OperatingExpensesCaption

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

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2023

rr_ExpensesDeferredChargesTextBlock

rr_ExpenseExampleHeading

Example

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same, except that this Example reflects the fee waiver/expense reimbursement arrangement for the C Class, Y Class and R5 Class shares through April 30, 2023. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption of shares:

rr_PortfolioTurnoverHeading

Portfolio Turnover

rr_PortfolioTurnoverTextBlock

rr_PortfolioTurnoverRate

28.00%

rr_StrategyHeading

Principal Investment Strategies

rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of medium capitalization companies. The Fund considers a company to be a medium capitalization company if it has a market capitalization (stock market worth), at the time of investment, between $1 billion and the market capitalization of the largest company in the Russell Midcap^® Index, which was $58.4 billion as of February 28, 2022. The Fund may also invest in equity securities of small-capitalization and large-capitalization companies.

Most of the assets of the Fund are invested in U.S. common stocks that Stephens Investment Management Group, LLC (“SIMG”) believes have clear indicators of future earnings growth, or that demonstrate other potential for growth of capital. The Fund may invest in other securities, including U.S. dollar denominated foreign stock traded on U.S. exchanges, American Depositary Receipts (“ADRs”), master limited partnerships (“MLPs”), and real estate investment trusts (“REITs”). In selecting companies for the Fund, SIMG primarily employs fundamental research with a focus on earnings growth. SIMG will sell a security when appropriate and consistent with the Fund’s investment objective and policies.

The Fund may also invest cash balances in other investment companies, including government money market funds. The Fund may seek to earn additional income by lending its securities to certain qualified broker-dealers and institutions.

rr_RiskHeading

Principal Risks

rr_RiskNarrativeTextBlock

■

The financial markets generally move in cycles, with periods of rising prices followed by periods of declining prices. The value of your investment may reflect these fluctuations.

■

rate increase or other significant policy changes. The U.S. Federal Reserve has started to raise interest rates, in part to address an increase in the annual inflation rate in the U.S. Over the longer term, rising interest rates may present a greater risk than has historically been the case due to the current period of relatively low rates and the effect of government fiscal and monetary policy initiatives and potential market reaction to those initiatives or their alteration or cessation.

■	Government Money Market Funds Risk. Investments in government money market funds are subject to interest rate risk, credit risk, and market risk.

■

rr_RiskLoseMoney

There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your investment in the Fund.

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceNarrativeTextBlock

In the table below, the performance shown for the R5 Class shares of the Fund for periods prior to February 24, 2012 is the performance of the Class I shares of the Fund’s predecessor. In the table below, the performance for the Fund’s A Class, C Class and Y Class shares for periods prior to February 24, 2012 represents the returns achieved by the Class A shares of the Fund’s predecessor. In the table below, the performance for the Fund’s R6 Class shares for periods prior to December 31, 2018 represents the returns achieved by the Class I shares of the Fund’s predecessor from January 1, 2012 through February 23, 2012, and the performance of the Fund’s R5 Class shares from February 24, 2012 through December 30, 2018. In each case, the newer share classes would have had similar annual returns to the older share classes because the shares of each class represent investments in the same portfolio securities. However, the older share classes had different expenses than the newer share classes, which would affect performance. The performance of the newer share classes shown in the bar chart and table has not been adjusted for differences in operating expenses between those share classes and the older share classes, but the A Class and C Class shares performance has been adjusted for the impact of the maximum applicable sales charge. You may obtain updated performance information on the Fund’s website at www.americanbeaconfunds.com. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

rr_PerformanceInformationIllustratesVariabilityOfReturns

rr_PerformanceAvailabilityWebSiteAddress

www.americanbeaconfunds.com

rr_PerformancePastDoesNotIndicateFuture

Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

rr_BarChartHeading

Calendar year total returns for Investor Class Shares. Year Ended 12/31

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableNotRelevantToTaxDeferred

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for Investor Class shares of the Fund; after-tax returns for other share classes will vary.

rr_PerformanceTableExplanationAfterTaxHigher

rr_BarChartClosingTextBlock

Highest Quarterly Return:
34.11%2nd Quarter 2020
01/01/2012 through 12/31/2021

Lowest Quarterly Return:
-18.26%1st Quarter 2020
01/01/2012 through 12/31/2021

rr_PerformanceTableHeading

Average annual total returns for periods ended December 31, 2021

(American Beacon Funds) | (American Beacon Stephens Mid-Cap Growth Fund℠) | Russell Midcap® Growth Index (Reflects no deduction for fees, expenses, or taxes)

rr_PerformanceTableClosingTextBlock

rr_ProspectusTable

rr_AverageAnnualReturnYear01

12.73%

rr_AverageAnnualReturnYear05

19.83%

(American Beacon Funds) | (American Beacon Stephens Mid-Cap Growth Fund℠) | A Class

rr_AverageAnnualReturnYear10

16.63%

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

rr_MaximumDeferredSalesChargeOverOther

0.50%

^[7]

rr_ManagementFeesOverAssets

0.80%

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.09%

^[8]

rr_ExpensesOverAssets

1.14%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

none

^[9]

rr_NetExpensesOverAssets

1.14%

rr_ExpenseExampleYear01

$ 685

rr_ExpenseExampleYear03

916

rr_ExpenseExampleYear05

1,167

rr_ExpenseExampleYear10

$ 1,881

rr_AverageAnnualReturnYear01

5.71%

rr_AverageAnnualReturnYear05

20.37%

rr_AverageAnnualReturnYear10

15.25%

(American Beacon Funds) | (American Beacon Stephens Mid-Cap Growth Fund℠) | C Class

rr_AverageAnnualReturnInceptionDate

Feb. 24, 2012

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

1.00%

rr_ManagementFeesOverAssets

0.80%

rr_DistributionAndService12b1FeesOverAssets

1.00%

rr_OtherExpensesOverAssets

0.18%

^[8]

rr_ExpensesOverAssets

1.98%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.04%)

^[9]

rr_NetExpensesOverAssets

1.94%

rr_ExpenseExampleYear01

$ 297

rr_ExpenseExampleYear03

618

rr_ExpenseExampleYear05

1,064

rr_ExpenseExampleYear10

2,303

rr_ExpenseExampleNoRedemptionYear01

197

rr_ExpenseExampleNoRedemptionYear03

618

rr_ExpenseExampleNoRedemptionYear05

1,064

rr_ExpenseExampleNoRedemptionYear10

$ 2,303

rr_AverageAnnualReturnYear01

10.29%

rr_AverageAnnualReturnYear05

20.90%

rr_AverageAnnualReturnYear10

15.10%

(American Beacon Funds) | (American Beacon Stephens Mid-Cap Growth Fund℠) | Y Class

rr_AverageAnnualReturnInceptionDate

Feb. 24, 2012

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.80%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.17%

^[8]

rr_ExpensesOverAssets

0.97%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

^[9]

rr_NetExpensesOverAssets

0.95%

rr_ExpenseExampleYear01

$ 97

rr_ExpenseExampleYear03

307

rr_ExpenseExampleYear05

534

rr_ExpenseExampleYear10

$ 1,188

rr_AverageAnnualReturnYear01

12.41%

rr_AverageAnnualReturnYear05

22.12%

rr_AverageAnnualReturnYear10

16.29%

(American Beacon Funds) | (American Beacon Stephens Mid-Cap Growth Fund℠) | R6 Class

rr_AverageAnnualReturnInceptionDate

Feb. 24, 2012

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.80%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.08%

^[8]

rr_ExpensesOverAssets

0.88%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

none

^[9]

rr_NetExpensesOverAssets

0.88%

rr_ExpenseExampleYear01

$ 90

rr_ExpenseExampleYear03

281

rr_ExpenseExampleYear05

488

rr_ExpenseExampleYear10

$ 1,084

rr_AverageAnnualReturnYear01

12.47%

rr_AverageAnnualReturnYear05

22.25%

rr_AverageAnnualReturnYear10

16.40%

(American Beacon Funds) | (American Beacon Stephens Mid-Cap Growth Fund℠) | R5 Class

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2018

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.80%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.10%

^[8]

rr_ExpensesOverAssets

0.90%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.01%)

^[9]

rr_NetExpensesOverAssets

0.89%

rr_ExpenseExampleYear01

$ 91

rr_ExpenseExampleYear03

286

rr_ExpenseExampleYear05

497

rr_ExpenseExampleYear10

$ 1,107

rr_AverageAnnualReturnYear01

12.46%

rr_AverageAnnualReturnYear05

22.23%

rr_AverageAnnualReturnYear10

16.39%

(American Beacon Funds) | (American Beacon Stephens Mid-Cap Growth Fund℠) | Investor Class

rr_AverageAnnualReturnInceptionDate

Aug. 31, 2006

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.80%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.34%

^[8]

rr_ExpensesOverAssets

1.14%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

none

^[9]

rr_NetExpensesOverAssets

1.14%

rr_ExpenseExampleYear01

$ 116

rr_ExpenseExampleYear03

362

rr_ExpenseExampleYear05

628

rr_ExpenseExampleYear10

$ 1,386

rr_AnnualReturn2012

14.75%

rr_AnnualReturn2013

32.71%

rr_AnnualReturn2014

2.97%

rr_AnnualReturn2015

(1.63%)

rr_AnnualReturn2016

6.42%

rr_AnnualReturn2017

27.97%

rr_AnnualReturn2018

1.91%

rr_AnnualReturn2019

31.28%

rr_AnnualReturn2020

39.80%

rr_AnnualReturn2021

12.20%

rr_HighestQuarterlyReturnLabel

Highest Quarterly Return:34.11%2nd Quarter 202001/01/2012 through 12/31/2021

rr_BarChartHighestQuarterlyReturn

34.11%

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2020

rr_LowestQuarterlyReturnLabel

Lowest Quarterly Return:-18.26%1st Quarter 202001/01/2012 through 12/31/2021

rr_BarChartLowestQuarterlyReturn

(18.26%)

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

rr_AverageAnnualReturnYear01

12.20%

rr_AverageAnnualReturnYear05

21.84%

rr_AverageAnnualReturnYear10

15.99%

(American Beacon Funds) | (American Beacon Stephens Mid-Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions

rr_AverageAnnualReturnInceptionDate

Feb. 01, 2006

rr_ProspectusTable

rr_AverageAnnualReturnYear01

10.31%

rr_AverageAnnualReturnYear05

20.34%

(American Beacon Funds) | (American Beacon Stephens Mid-Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares

rr_AverageAnnualReturnYear10

14.66%

rr_ProspectusTable

rr_AverageAnnualReturnYear01

8.53%

rr_AverageAnnualReturnYear05

17.52%

(American Beacon Funds) | (American Beacon Stephens Small Cap Growth Fund℠)

rr_AverageAnnualReturnYear10

13.08%

rr_ProspectusTable

rr_ObjectiveHeading

Investment Objective

rr_ObjectivePrimaryTextBlock

The Fund seeks long-term growth of capital.

rr_ExpenseHeading

Fees and Expenses of the Fund

rr_ExpenseNarrativeTextBlock

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointDiscounts

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_OperatingExpensesCaption

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

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

April 30, 2023

rr_ExpensesDeferredChargesTextBlock

rr_ExpenseExampleHeading

Example

Expense Example, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNarrativeTextBlock

rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption of shares:

rr_PortfolioTurnoverHeading

Portfolio Turnover

rr_PortfolioTurnoverTextBlock

rr_PortfolioTurnoverRate

28.00%

rr_StrategyHeading

Principal Investment Strategies

rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in equity securities of small capitalization companies. The Fund considers a company to be a small capitalization company if it has a market capitalization (stock market worth), at the time of investment, similar to the market capitalizations of the companies in the Russell 2000^® Index. The capitalization range of that index is subject to change over time due to market activity or changes in the composition of the index. As of February 28, 2022, the market capitalizations of the companies in the Russell 2000 Index ranged from $18.6 million to $12 billion. The Fund may also invest in mid-capitalization companies.

Most of the assets of the Fund are invested in U.S. common stocks the sub-advisor, Stephens Investment Management Group, LLC (“SIMG”), believes have clear indicators of future earnings growth, or that demonstrate other potential for growth of capital. The Fund may invest in other securities, including master limited partnerships (“MLPs”), real estate investment trusts (“REITs”), American Depositary Receipts (“ADRs”) and U.S. dollar denominated foreign stock traded on U.S. exchanges. In selecting companies for the Fund, SIMG primarily employs fundamental research with a focus on earnings growth. SIMG will sell a security when appropriate and consistent with the Fund’s investment objectives and policies.

rr_RiskHeading

Principal Risks

rr_RiskNarrativeTextBlock

■

The financial markets generally move in cycles, with periods of rising prices followed by periods of declining prices. The value of your investment may reflect these fluctuations.

■

■	Government Money Market Funds Risk. Investments in government money market funds are subject to interest rate risk, credit risk, and market risk.

■

rr_RiskLoseMoney

There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your investment in the Fund.

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceNarrativeTextBlock

On February 24, 2012, the Fund acquired all the assets and assumed all the liabilities of the Fund’s predecessor. In connection with that reorganization, the Investor Class and R5 Class shares of the Fund adopted the performance history, without the deduction of the maximum applicable sales charge, and financial statements of the Class A and Class I shares, respectively, of the Fund’s predecessor. In the bar chart and table below, the performance of the Fund’s Investor Class shares for periods prior to February 24, 2012 is the performance of the Class A shares of the Fund’s predecessor. The table below also shows the performance of the A Class, C Class, Y Class, R5 Class, and R6 Class shares of the Fund. In the table below, the performance shown for the R5 Class shares of the Fund for periods prior to February 24, 2012 is the performance of the Class I shares of the Fund’s predecessor. The performance shown for the Fund’s Y Class, A Class and C Class shares for periods prior to February 24, 2012 represents the returns achieved by the Class A shares of the Fund’s predecessor. In the table below, the performance for the Fund’s R6 Class shares for periods prior to April 30, 2019 represents the returns achieved by the Class I shares of the Fund’s predecessor from January 1, 2012 through February 23, 2012, and the performance of the Fund’s Investor Class shares from February 24, 2012 through April 29, 2019. In each case, the newer share classes would have had similar annual returns to the older share classes because the shares of each class represent investments in the same portfolio securities. However, the older share classes had different expenses than the newer share classes, which would affect performance. The performance of the newer share classes shown in the bar chart and table has not been adjusted for differences in operating expenses between those share classes and the older share classes, but the A Class and C Class shares performance has been adjusted for the impact of the maximum applicable sales charge. You may obtain updated performance information on the Fund’s website at www.americanbeaconfunds.com. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

rr_PerformanceInformationIllustratesVariabilityOfReturns

rr_PerformanceAvailabilityWebSiteAddress

www.americanbeaconfunds.com

rr_PerformancePastDoesNotIndicateFuture

Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

rr_BarChartHeading

Calendar year total returns for Investor Class Shares. Year Ended 12/31

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableNotRelevantToTaxDeferred

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for Investor Class shares of the Fund; after-tax returns for other share classes will vary.

rr_PerformanceTableExplanationAfterTaxHigher

rr_BarChartClosingTextBlock

Highest Quarterly Return:
37.56%2nd Quarter 2020
01/01/2012 through 12/31/2021

Lowest Quarterly Return:
-22.26%1st Quarter 2020
01/01/2012 through 12/31/2021

rr_PerformanceTableHeading

Average annual total returns for periods ended December 31, 2021

(American Beacon Funds) | (American Beacon Stephens Small Cap Growth Fund℠) | Russell 2000® Growth Index (Reflects no deduction for fees, expenses or taxes)

rr_PerformanceTableClosingTextBlock

rr_ProspectusTable

rr_AverageAnnualReturnYear01

2.83%

rr_AverageAnnualReturnYear05

14.53%

(American Beacon Funds) | (American Beacon Stephens Small Cap Growth Fund℠) | A Class

rr_AverageAnnualReturnYear10

14.14%

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

rr_MaximumDeferredSalesChargeOverOther

0.50%

^[10]

rr_ManagementFeesOverAssets

0.92%

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.21%

^[11]

rr_ExpensesOverAssets

1.38%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[12]

rr_NetExpensesOverAssets

1.28%

rr_ExpenseExampleYear01

$ 698

rr_ExpenseExampleYear03

978

rr_ExpenseExampleYear05

1,278

rr_ExpenseExampleYear10

$ 2,129

rr_AverageAnnualReturnYear01

7.45%

rr_AverageAnnualReturnYear05

17.25%

rr_AverageAnnualReturnYear10

13.85%

(American Beacon Funds) | (American Beacon Stephens Small Cap Growth Fund℠) | C Class

rr_AverageAnnualReturnInceptionDate

Feb. 24, 2012

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

1.00%

rr_ManagementFeesOverAssets

0.92%

rr_DistributionAndService12b1FeesOverAssets

1.00%

rr_OtherExpensesOverAssets

0.32%

^[11]

rr_ExpensesOverAssets

2.24%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.18%)

^[12]

rr_NetExpensesOverAssets

2.06%

rr_ExpenseExampleYear01

$ 309

rr_ExpenseExampleYear03

683

rr_ExpenseExampleYear05

1,184

rr_ExpenseExampleYear10

2,561

rr_ExpenseExampleNoRedemptionYear01

209

rr_ExpenseExampleNoRedemptionYear03

683

rr_ExpenseExampleNoRedemptionYear05

1,184

rr_ExpenseExampleNoRedemptionYear10

$ 2,561

rr_AverageAnnualReturnYear01

11.91%

^[13]

rr_AverageAnnualReturnYear05

17.69%

^[13]

rr_AverageAnnualReturnYear10

13.65%

^[13]

(American Beacon Funds) | (American Beacon Stephens Small Cap Growth Fund℠) | Y Class

rr_AverageAnnualReturnInceptionDate

Feb. 24, 2012

^[13]

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.92%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.18%

^[11]

rr_ExpensesOverAssets

1.10%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[12]

rr_NetExpensesOverAssets

1.05%

rr_ExpenseExampleYear01

$ 107

rr_ExpenseExampleYear03

345

rr_ExpenseExampleYear05

601

rr_ExpenseExampleYear10

$ 1,336

rr_AverageAnnualReturnYear01

14.23%

rr_AverageAnnualReturnYear05

18.92%

rr_AverageAnnualReturnYear10

14.86%

(American Beacon Funds) | (American Beacon Stephens Small Cap Growth Fund℠) | R6 Class

rr_AverageAnnualReturnInceptionDate

Feb. 24, 2012

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.92%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.09%

^[11]

rr_ExpensesOverAssets

1.01%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[12]

rr_NetExpensesOverAssets

0.96%

rr_ExpenseExampleYear01

$ 98

rr_ExpenseExampleYear03

317

rr_ExpenseExampleYear05

553

rr_ExpenseExampleYear10

$ 1,232

rr_AverageAnnualReturnYear01

14.30%

rr_AverageAnnualReturnYear05

19.01%

rr_AverageAnnualReturnYear10

14.95%

(American Beacon Funds) | (American Beacon Stephens Small Cap Growth Fund℠) | R5 Class

rr_AverageAnnualReturnInceptionDate

Apr. 30, 2019

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.92%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.12%

^[11]

rr_ExpensesOverAssets

1.04%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[12]

rr_NetExpensesOverAssets

0.99%

rr_ExpenseExampleYear01

$ 101

rr_ExpenseExampleYear03

326

rr_ExpenseExampleYear05

569

rr_ExpenseExampleYear10

$ 1,266

rr_AverageAnnualReturnYear01

14.34%

rr_AverageAnnualReturnYear05

18.98%

rr_AverageAnnualReturnYear10

14.94%

(American Beacon Funds) | (American Beacon Stephens Small Cap Growth Fund℠) | Investor Class

rr_AverageAnnualReturnInceptionDate

Aug. 31, 2006

Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.92%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.43%

^[11]

rr_ExpensesOverAssets

1.35%

Total Annual Fund Operating Expenses After Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[12]

rr_NetExpensesOverAssets

1.30%

rr_ExpenseExampleYear01

$ 132

rr_ExpenseExampleYear03

423

rr_ExpenseExampleYear05

735

rr_ExpenseExampleYear10

$ 1,620

rr_AnnualReturn2012

15.92%

rr_AnnualReturn2013

42.62%

rr_AnnualReturn2014

(3.35%)

rr_AnnualReturn2015

(5.08%)

rr_AnnualReturn2016

9.76%

rr_AnnualReturn2017

19.23%

rr_AnnualReturn2018

2.93%

rr_AnnualReturn2019

22.49%

rr_AnnualReturn2020

37.18%

rr_AnnualReturn2021

13.93%

rr_HighestQuarterlyReturnLabel

Highest Quarterly Return:37.56%2nd Quarter 202001/01/2012 through 12/31/2021

rr_BarChartHighestQuarterlyReturn

37.56%

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2020

rr_LowestQuarterlyReturnLabel

Lowest Quarterly Return:-22.26%1st Quarter 202001/01/2012 through 12/31/2021

rr_BarChartLowestQuarterlyReturn

(22.26%)

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

rr_AverageAnnualReturnYear01

13.93%

rr_AverageAnnualReturnYear05

18.63%

rr_AverageAnnualReturnYear10

14.61%

(American Beacon Funds) | (American Beacon Stephens Small Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions

rr_AverageAnnualReturnInceptionDate

Dec. 01, 2005

rr_ProspectusTable

rr_AverageAnnualReturnYear01

8.68%

rr_AverageAnnualReturnYear05

14.35%

(American Beacon Funds) | (American Beacon Stephens Small Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares

rr_AverageAnnualReturnYear10

12.03%

rr_ProspectusTable

rr_AverageAnnualReturnYear01

11.91%

rr_AverageAnnualReturnYear05

14.11%