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<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>

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The Fund's investment objective is to seek high current income and, secondarily, capital appreciation.

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<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>

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This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. 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 35 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 48 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 and Waivers".

Expense Breakpoint, Minimum Investment Required [Amount]

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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.

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$ 50,000

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<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b> </div>

Fee Waiver or Reimbursement over Assets, Date of Termination

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<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)</b> </div>

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December 31, 2019

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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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<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Example</b></div>

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 the Example reflects the fee waiver/expense reimbursement arrangement for the Institutional Class shares through December 31, 2019. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

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<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>

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<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>

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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 51% of the average value of its portfolio.

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51.00%

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<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>

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This Fund seeks to maximize current income by investing in a diversified portfolio of fixed income securities that are generally rated below investment grade (such as Ba or lower by Moody's Investors Service, Inc. or BB or lower by Standard & Poor's Ratings Services or Fitch, Inc.) or deemed to be below investment grade by the Fund's sub-advisor, Strategic Income Management, LLC ("SiM"). These types of securities are commonly referred to as "high yield" or "junk" bonds.

The Fund seeks to achieve its investment objective by investing, under normal circumstances, at least 80% of the Fund's net assets (plus the amount of any borrowing for investment purposes) in non-investment grade securities and/or financial instruments that provide exposure to non-investment grade securities. These financial instruments include futures contracts (including futures contracts on stock indices and currencies), forward contracts (including currency forward contracts), swap agreements and structured notes whose underlying assets are rated below investment grade.

The non-investment grade securities in which the Fund may invest include: corporate bonds, convertible securities, preferred stock, bank and senior loans, floating rate loans, emerging market debt, municipal securities, asset-backed and mortgage-backed securities, and Rule 144A securities. The Fund may invest in securities of foreign issuers, including those in emerging markets. The Fund has no limitations regarding the maturities of the debt securities it can buy, the market capitalization of the issuers of those securities or whether the securities are rated.

The Fund's investments in derivative instruments include futures contracts, forward contracts, swap agreements (including total return swaps, credit default swaps and currency swaps) and structured notes. The Fund may use these derivative instruments to enhance total return, to hedge against fluctuations in securities prices, interest rates or currency exchange rates, to manage the effective duration of its portfolio, and to manage certain investment risks or as a substitute for purchase or sale of the underlying currencies or securities.

The Fund may have exposure to foreign currencies for investment or hedging purposes by purchasing or selling forward currency exchange contracts in non-U.S. or emerging market currencies, and non-U.S. currency futures contracts. The Fund may also make direct investments in non-U.S. currencies and in securities denominated in non-U.S. currencies. Investments in currencies and currency hedging are established to extract value or reduce risk.

The remainder of the Fund's assets may be invested in any other securities that SiM believes are consistent with the Fund's objective, including investment grade fixed-income securities, U.S. government securities, common stock, American Depositary Receipts ("ADRs") and Global Depositary Receipts ("GDRs"), real estate investment trusts ("REITs"), loan participation interests, and income-producing equity securities, such as master limited partnerships ("MLPs"), and income trusts and income deposit securities ("IDSs"). The Fund may invest cash balances in exchange-traded funds to gain market exposure on cash balances.

In selecting investments for the Fund, SiM uses an approach that combines different aspects of top down and bottom up analysis. As part of its top down analysis, SiM utilizes a core philosophy to identify positive long term trends. SiM then invests in sectors, industries and companies that will benefit from these trends. Concurrent with this core philosophy, SiM's management seeks to take advantage of market volatility by analyzing and potentially investing in sectors, industries and companies undergoing a change in dynamics that has not been fully recognized by the market. Market volatility continually provides opportunities to capture value from these types of situations. Once potential investment opportunities are identified, SiM utilizes bottom up research to assess the fundamental strengths and weaknesses of each individual company and the best risk/reward security is chosen for inclusion in the portfolio. The Fund may have significant exposure to the Consumer Staples sector. However, as the sector composition of the Fund's portfolio changes over time, the Fund's exposure to the Consumer Staples sector may be lower at a future date, and the Fund's exposure to other market sectors may be higher.

SiM may reduce or sell the Fund's portfolio securities for a variety of reasons, including if, in SiM's opinion, a security's value becomes fully recognized or there is a reassessment of the fundamental attributes of the security.

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<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>

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There is no assurance that the Fund will achieve its investment objectives and you could lose part or all of your investment in the Fund. The Fund is designed primarily for investors seeking current income from a fund that typically invests mainly in a variety of domestic and foreign high-yield, high-risk debt securities. Those investors should be willing to assume the credit risks of a fund that typically invests a significant amount of its assets in below investment-grade debt securities and the price changes in those securities that can occur when interest rates change. The Fund is not designed for investors who need an assured level of current income. The Fund 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 are:

Allocation Risk
The sub-advisor's judgments about, and allocations among, asset classes and market exposures may adversely affect the Fund's performance. This risk may be increased by the use of derivatives to increase allocations to various market exposures.

Asset-Backed and Mortgage Related Securities Risk
Investments in asset-backed and mortgage related securities are subject to market risks for fixed-income securities which include, but are not limited to, interest rate risk, prepayment risk and extension risk. A decline in the credit quality of the issuers of asset-backed and mortgage related securities or instability in the markets for such securities may affect the value and liquidity of such securities, which could result in losses to the Fund.

Convertible Securities Risk
The value of a convertible security typically increases or decreases with the price of the underlying common stock. In general, a convertible security is subject to the risks of stocks when the underlying stock's price is high relative to the conversion price and is subject to the risks of debt securities when the underlying stock's price is low relative to the conversion price. Many convertible securities have credit ratings that are below investment grade and are subject to the same risks as an investment in below investment grade debt securities (commonly known as "junk bonds"). In addition, because companies that issue convertible securities may be small- or mid-cap companies, to the extent the Fund invests in convertible securities issued by small- or mid-cap companies, it will be subject to the risks of investing in such companies. The stocks of small- and mid-cap companies may fluctuate more widely in price than the market as a whole and there may also be less trading in small- or mid-cap stocks.

Counterparty Risk
The Fund is subject to the risk that a party or participant to a transaction, such as a broker or derivative counterparty, will be unwilling or unable to satisfy its obligation to make timely principal, interest or settlement payments or to otherwise honor its obligations to the Fund.

Credit Risk
The Fund is subject to the risk that the issuer or guarantor of an obligation, or the counterparty to a transaction, including a derivatives contract or a loan will fail to make timely payment of interest or principal or otherwise honor its obligations or default completely. Credit risk is typically greater for securities with ratings that are below investment grade (commonly referred to as "junk bonds"). Since the Fund can invest significantly in lower-quality debt securities considered speculative in nature, this risk will be substantial. A downgrade or default affecting any of the Fund's securities could affect the Fund's performance.

Currency Risk
The Fund may have exposure to foreign currencies by purchasing or selling forward currency contracts in non-U.S. currencies, non-U.S. currency futures contracts and in securities denominated in non-U.S. currencies. Foreign currencies will fluctuate, and may decline in value relative to the U.S. dollar and other currencies and thereby affect the Fund's investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies.

Cybersecurity and Operational Risk
The Fund and its service providers, and shareholders' ability to transact with the Fund, may be negatively impacted due to operational risks arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the 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.

Derivatives Risk
Derivatives may involve significant risk. The use of derivative instruments may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities or other instruments underlying those derivatives, including the high degree of leverage often embedded in such instruments, and potential material and prolonged deviations between the theoretical value and realizable value of a derivative. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. Derivatives may be illiquid and may be more volatile than other types of investments. The Fund may buy or sell derivatives not traded on an exchange and which may be subject to heightened liquidity and valuation risk. Derivative investments can increase portfolio turnover and transaction costs. Derivatives also are subject to counterparty risk and credit risk. As a result, the Fund may obtain no recovery of its investment or may only obtain a limited recovery, and any recovery may be delayed. Not all derivative transactions require a counterparty to post collateral, which may expose the Fund to greater losses in the event of a default by a counterparty. The Fund's use of derivatives also may create financial leverage, which may result in losses that exceed the amount originally invested and accelerate the rate of losses. Suitable derivatives may not be available in all circumstances, and there can be no assurance that the Fund will use derivatives to reduce exposure to other risks when that might have been beneficial. Although the Fund may attempt to hedge against certain risks, the hedging instruments may not perform as expected and could produce losses. Ongoing changes to regulation of the derivatives markets and potential changes in the regulation of funds using derivative instruments could limit the Fund's ability to pursue its investment strategies. In addition, the Fund's investments in derivatives are subject to the following risks:

Futures and Forward Contracts. 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 or to buy or sell a specific currency at a future date at a price set at the time of the contract. 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 are no limitations on daily price movements of forward contracts. There can be no assurance that any strategy used will succeed. Not all forward contracts require a counterparty to post collateral, which may expose the Fund to greater losses in the event of a default by a counterparty. There 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. Forward currency transactions include the risks associated with fluctuations in currency. Interest rate and Treasury futures contracts expose the Fund to price fluctuations resulting from changes in interest rates. The Fund could suffer a loss if interest rates rise after the Fund has purchased an interest rate futures contract or fall after the Fund has sold an interest rate futures contract. Similarly, Treasury futures contracts expose the Fund to potential losses if interest rates do not move as expected. Equity index futures contracts expose the Fund to volatility in an underlying securities index.
Structured Notes. Structured notes are derivative debt instruments with principal and/or interest payments linked to the value of a commodity, a foreign currency, an index of securities, an interest rate or other financial indicators ("reference instruments"). The payments on a structured note may vary based on changes in one or more specified reference instruments, such as a floating interest rate compared to a fixed interest rate, the exchange rates between two currencies, one or more securities or a securities or commodities index. A structured note may be positively or negatively indexed. Structured notes are subject to interest rate risk. They are also subject to credit risk with respect both to the issuer and, if applicable, to the underlying security or borrower. If the underlying investment or index does not perform as anticipated, the structured note might pay less interest than the stated coupon payment or repay less principal upon maturity.
Swap Agreements. Swaps can involve greater risks than a direct investment in an underlying asset because swaps typically include a certain amount of embedded leverage. If swaps are used as a hedging strategy, the Fund is subject to the risk that the hedging strategy may not eliminate the risk that it is intended to offset, due to, among other reasons, the occurrence of unexpected price movements or the non-occurrence of expected price movements. Swaps also may be difficult to value. Total return swaps, currency swaps and credit default swaps are subject to counterparty risk, credit risk and liquidity risk. In addition to these risks, total return swaps are subject to market risk and interest rate risk, if the underlying securities are bonds or other debt obligations. In addition, currency swaps are subject to currency risk, and credit default swaps are subject to the risks associated with the purchase and sale of credit protection.

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. Dividend paying stocks might not experience the same level of earnings growth or capital appreciation as non-dividend paying stocks.

Emerging Markets Risk
When investing in emerging markets, the risks of investing in foreign securities discussed below are heightened. Emerging markets are generally smaller, less developed, less liquid and more volatile than the securities markets of the U.S. and other developed markets. There are also risks of: greater political uncertainties; an economy's dependence on revenues from particular commodities or on international aid or development assistance; currency transfer restrictions; a limited number of potential buyers for such securities resulting in increased volatility and limited liquidity for emerging market securities; trading suspensions; and delays and disruptions in securities settlement procedures.

Equity Investments Risk
Equity securities are subject to market risk and investment risk. The Fund's investments in equity securities may include common stocks, preferred stocks, depositary receipts, REITs, MLPs, income trusts and IDSs. Such investments may expose the Fund to additional risks.

Common Stock. 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. Depositary receipts 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 and more volatility, less government regulation and supervision and delays in transaction settlement.
Income trusts and IDSs. Income trusts, which hold income producing assets and pass the income on to security holders, share many of the risks inherent in stock ownership and may lack diversification. Although IDSs, which are units representing shares of common stock and subordinated notes issued by a company, trade on an exchange, there may be a thinner and less active market for IDSs than that available for other securities. The value of an IDS will be affected by factors generally affecting both common stock and subordinated debt securities. Income trusts and IDSs are subject to credit risk, interest rate risk and dividend risk.
MLPs. Investing in MLPs involves certain risks related to investing in the underlying assets of the MLPs and risks associated with pooled investment vehicles. 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 may also make it more difficult 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").
Preferred Stock. Preferred stocks are sensitive to movements in interest rates. Preferred stocks also may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders.
REITs. Investments in REITs are subject to the risks associated with investing in the real estate industry such as adverse developments affecting the real estate industry and real property values. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. 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 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.

Floating Rate Securities Risk
The coupons on floating rate securities are not fixed and may fluctuate based upon changes in market rates. The coupon on a floating rate security is generally based on an interest rate such as a money-market index, London Interbank Offered Rate ("LIBOR") or a Treasury bill rate. Floating rate securities are subject to interest rate risk and credit risk.

As short-term interest rates decline, the coupons on floating rate securities typically decrease. Alternatively, during periods of rising interest rates, the coupons on floating-rate securities typically increase. Changes in the coupons of floating rate securities may lag behind changes in market rates or may have limits on the maximum increases in the coupon rates. The value of floating rate securities may decline if their coupons do not rise as much, or as quickly, as interest rates in general. Floating rate securities will not generally increase in value if interest rates decline.

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.

Hedging Risk
If the Fund uses a hedging instrument at the wrong time or judges the market conditions incorrectly, or the hedged instrument does not correlate to the risk sought to be hedged, the hedge might be unsuccessful, reduce the Fund's return, or create a loss. In addition, hedges, even when successful in mitigating risk, may not prevent the Fund from experiencing losses on its investments, and therefore the use of hedging strategies may reduce the Fund's return, or create a loss.

High Yield Securities Risk
Investing in high yield, below investment-grade securities (commonly referred to as "junk bonds") generally involves significantly greater risks of loss of your money than an investment in investment grade securities. High yield debt securities may fluctuate more widely in price and yield and may fall in price when the economy is weak or expected to become weak. High yield securities are considered to be speculative with respect to an issuer's ability to pay interest and principal and carry a greater risk that the issuers of lower-rated securities will default on the timely payment of principal and interest. Below investment grade securities may experience greater price volatility and less liquidity than investment grade securities.

Interest Rate Risk
The Fund is subject to the risk that the market value of fixed income securities or derivatives it holds, particularly mortgage backed and other asset backed securities, will decline due to rising interest rates. Generally, the value of investments with interest rate risk, such as fixed income securities, will move in the opposite direction to movements in interest rates. The Federal Reserve has raised the federal funds rate several times since December 2015 and has signaled additional increases in the near future. Interest rates may rise, perhaps significantly and/or rapidly, potentially resulting in substantial losses to the Fund. The prices of fixed income securities or derivatives are also affected by their durations. Fixed income securities or derivatives with longer durations generally have greater sensitivity to changes in interest rates. For example, if a bond has a duration of eight years, a 1% increase in interest rates could be expected to result in an 8% decrease in the value of the bond. An increase in interest rates can impact markets broadly as well. Some investors buy securities and derivatives with borrowed money; an increase in interest rates can cause a decline in those markets.

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 which 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.

Leverage Risk
Financial leverage magnifies the exposure to the swings in prices of an asset or class of assets underlying a derivative instrument and results in increased volatility, which means that the Fund will have the potential for greater losses than if the Fund does not use the derivative instruments that have a leveraging effect. Leverage may result in losses that exceed the amount originally invested and may accelerate the rate of losses. Leverage tends to magnify, sometimes significantly, the effect of any increase or decrease in the Fund's exposure to an asset or class of assets and may cause the Fund's net asset value ("NAV") to be volatile.

Liquidity Risk
The Fund is susceptible to the risk that certain investments held by the Fund, such as structured notes and other derivative instruments, may have limited marketability or be subject to restrictions on sale, and may be difficult or impossible to purchase or sell at favorable times or prices. The Fund could lose money if it is unable to dispose of an investment at a time that is most beneficial to the Fund. The Fund may be required to dispose of investments at unfavorable times or prices to satisfy obligations, which may result in losses or may be costly to the Fund. For example, the Fund may be forced to sell certain investments at unfavorable prices to meet redemption requests or other cash needs. Judgment plays a greater role in pricing illiquid investments than in investments with more active markets.

Loan Interests Risk
In making investments in bank loans or senior loans, the Fund will depend primarily on the creditworthiness of the borrower for payment of principal and interest, and will also rely on the financial institution to make principal and interest payments to the Fund once it receives payment on the underlying loan or to pursue appropriate remedies against a borrower in the event that the borrower defaults, which may expose the Fund to the credit risk of both the financial institution that made the loan and the underlying borrower. Unlike publicly traded common stocks which trade on national exchanges, there is no central place or exchange for loans, including bank loans and senior loans, to trade. Loans trade in an over-the-counter market, and confirmation and settlement, which are effected through standardized procedures and documentation, may take significantly longer than seven days to complete. Extended trade settlement periods may, in unusual market conditions with a high volume of shareholder redemptions, present a risk to shareholders regarding the Fund's ability to pay redemption proceeds within the allowable time periods stated in its prospectus. The secondary market for floating rate loans also may be subject to irregular trading activity and wide bid/ask spreads. The lack of an active trading market for certain loans may impair the ability of the Fund to sell its loan interests at a time when it may otherwise be desirable to do so or may require the Fund to sell them at prices that are less than what the Fund regards as their fair market value and may make it difficult to value such loans. Interests in loans made to finance highly leveraged companies or transactions, such as corporate acquisitions, may be especially vulnerable to adverse changes in economic or market conditions. The Fund may acquire a loan interest by obtaining an assignment of all or a portion of the interests in a particular loan that are held by an original lender or a prior assignee. As an assignee, the Fund normally will succeed to all rights and obligations of its assignor with respect to the portion of the loan that is being assigned. However, the rights and obligations acquired by the purchaser of a loan assignment may differ from, and be more limited than, those held by the original lenders or the assignor. Alternatively, the Fund may acquire a participation in a loan interest that is held by another party. When the Fund's loan interest is a participation, the Fund is subject to the risk that the party selling the participation interest will not remit the Fund's pro rata share of loan payments to the Fund, and the Fund may have less control over the exercise of remedies than the party selling the participation interest.

Market Risk
Since the financial crisis that started in 2008, the U.S. and many foreign economies continue to experience its after-effects, which have resulted, and may continue to result, in fixed income instruments experiencing unusual liquidity issues, increased price volatility and, in some cases, credit downgrades and increased likelihood of default. These events have reduced the willingness and ability of some lenders to extend credit, and have made it more difficult for some borrowers to obtain financing on attractive terms, if at all. In addition, global economies and financial markets are becoming increasingly interconnected, which increases the possibilities that conditions in one country or region might adversely impact issuers in a different country or region. A rise in protectionist trade policies, and the possibility of changes to some international trade agreements, could affect the economies of many nations in ways that cannot necessarily be foreseen at the present time. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasi-governmental organizations.

In addition, political events within the U.S. and abroad may affect investor and consumer confidence and may adversely impact financial markets and the broader economy, perhaps suddenly and to a significant degree. High public debt in the U.S. and other countries creates ongoing systemic and market risks and policymaking uncertainty. Because the impact on the markets has been widespread, it may be difficult to identify both risks and opportunities using past models of the interplay of market forces, or to predict the duration of these market conditions. Interest rates have been unusually low in recent years in the U.S. and abroad. Because there is little precedent for this situation, it is difficult to predict the impact on various markets of a significant rate increase, whether brought about by U.S. policy makers or by dislocations in world markets. In addition, there is a risk that the prices of goods and services in the U.S. and many foreign economies may decline over time, known as deflation (the opposite of inflation). Deflation may have an adverse effect on stock prices and creditworthiness and may make defaults on debt more likely.

Market Timing Risk
Frequent trading by Fund shareholders poses risks to other shareholders in the Fund, including (i) the dilution of the Fund's NAV, (ii) an increase in the Fund's expenses, and (iii) interference with the portfolio manager's ability to execute efficient investment strategies. Because of specific types of securities in which the Fund may invest, it could be subject to the risk of market timing activities by shareholders.

Municipal Securities Risk
Municipal securities could be adversely affected by adverse political and legislative changes. Changes in the financial condition of a municipality may affect the ability of a municipal issuer to make interest and principal payments on a security as they become due. Changes in interest rates and market conditions may directly impact the liquidity and valuation of municipal securities, which may affect the yield and value of the Fund's municipal securities investments. A downgrade in the issuer's or security's credit rating can reduce the market value of the security.

Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including exchange-traded funds ("ETFs"). 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 and will be subject to the risks associated with investments in those companies. For example, to the extent the Fund invests in ETFs that invest in equity securities, fixed income securities and/or foreign securities, or that track an index, the Fund would be subject to the risks associated with the underlying investments held by the ETF or the index fluctuations to which the ETF is subject. Because ETFs are listed on an exchange, they may be subject to trading halts, may trade at a discount or premium to their NAV and may not be liquid. ETF shares may trade at a premium or discount to their net asset value. An ETF that tracks an index may not precisely replicate the returns of its benchmark index.

Prepayment and Extension Risk
Prepayment risk is the risk that the principal amount of a bond may be repaid prior to the bond's maturity date. Due to a decline in interest rates or excess cash flow, a debt security may be called or otherwise prepaid before maturity. If this occurs, no additional interest will be paid on the investment and the Fund may have to invest at a lower rate, may not benefit from an increase in value that may result from declining interest rates, and may lose any premium it paid to acquire the security. Variable and floating rate securities may be less sensitive to prepayment risk. Extension risk is the risk that a decrease in prepayments may, as a result of higher interest rates or other factors, result in the extension of a security's effective maturity, heighten interest rate risk and increase the potential for a decline in its price.

Redemption Risk
Due to a rise in interest rates or other market developments that may cause investors to move out of fixed income securities on a large scale, 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 heightened during periods of declining or illiquid markets. Heavy redemptions could hurt the Fund's performance.

Restricted Securities Risk
Securities not registered in the U.S. under the Securities Act of 1933, as amended (the "Securities Act"), including Rule 144A securities, are restricted as to their resale. Such securities may not be listed on an exchange and may have no active trading market. They may be more difficult to purchase or sell at an advantageous time or price because such securities may not be readily marketable in broad public markets, or may have to be held for a certain time period before they can be resold. The Fund may not be able to sell a restricted security when the sub-advisor(s) considers it desirable to do so and/or may have to sell the security at a lower price than the Fund believes is its fair market value. In addition, transaction costs may be higher for restricted securities and the Fund may receive only limited information regarding the issuer of a restricted security. The Fund may have to bear the expense of registering restricted securities for resale and the risk of substantial delays in effecting the registration.

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.

Consumer Staples Sector Risk. The consumer staples sector generally consists of companies whose primary lines of business are food, beverage and other household items. This sector can be affected by, among other things, changes in price and availability of underlying commodities, rising energy prices and global economic conditions. Unlike the consumer discretionary sector, companies in the consumer staples sector have historically been characterized as non-cyclical in nature and therefore less volatile in times of change. Companies in the consumer staples sector are subject to government regulation affecting the permissibility of using various food additives and production methods, which regulations could affect company profitability. Tobacco companies may be adversely affected by the adoption of proposed legislation and/or by litigation.

Securities Selection Risk
Securities selected by the sub-advisor or the Manager for the Fund may not perform to expectations. This could result in the Fund's underperformance compared to other funds with similar investment objectives.

Segregated Assets Risk
In connection with certain transactions that may give rise to future payment obligations, including short sales and investments in derivatives, the Fund may be required to maintain a segregated amount of, or otherwise earmark, cash or liquid securities to cover the obligation. Segregated assets cannot be sold while the position they are covering is outstanding, unless they are replaced with other assets of equal value. The need to maintain cash or other liquid securities in segregated accounts could limit the Fund's ability to pursue other opportunities as they arise.

Unrated Securities Risk
Because the Fund may purchase securities that are not rated by any rating organization, the sub-advisor, after assessing their credit quality, may internally assign ratings to certain of those securities in categories similar to those of rating organizations. Some unrated securities may not have an active trading market or may be difficult to value, which means the Fund might have difficulty selling them promptly at an acceptable price. Unrated securities may be subject to greater liquidity risk and price volatility.

U.S. Government Securities and Government-Sponsored Enterprises Risk
A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. The market prices for such securities are not guaranteed and will fluctuate. Securities held by the Fund that are issued by government-sponsored enterprises, such as the Federal National Mortgage Association (''Fannie Mae''), Federal Home Loan Mortgage Corporation (''Freddie Mac''), Federal Home Loan Bank (''FHLB''), Federal Farm Credit Bank ("FFCB"), and the Tennessee Valley Authority are not guaranteed by the U.S. Treasury and are not backed by the full faith and credit of the U.S. Government, and no assurance can be given that the U.S. Government will provide financial support if these organizations do not have the funds to meet future payment obligations. U.S. Government securities and securities of government-sponsored entities are also subject to credit risk, interest rate risk and market risk.

Valuation Risk
The Fund may value certain assets at a price different from the price at which they can be sold. This risk may be especially pronounced for investments that are illiquid or which may become illiquid.

rr_RiskLoseMoney

There is no assurance that the Fund will achieve its investment objectives 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

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>

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 performance compares to a broad-based market index, which is the Fund's benchmark 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_BarChartHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Calendar year total returns for Investor Class Shares. Year Ended 12/31</b></div>

rr_BarChartClosingTextBlock

Highest Quarterly Return:
6.99% 1st Quarter 2012
01/01/2012 through 12/31/2017

Lowest Quarterly Return:
-3.55% 3rd Quarter 2015
01/01/2012 through 12/31/2017

The calendar year-to-date total return as of September 30, 2018 was 2.65%

rr_PerformanceTableHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> <b>Average annual total returns</b> for periods ended December 31, 2017 </b></div>

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 Fund's Investor Class shares; after-tax returns for other share classes will vary.

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.

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_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.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformancePastDoesNotIndicateFuture

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

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows how the Fund's performance has varied from year to year. The table shows how the Fund's performance compares to a broad-based market index, which is the Fund's benchmark index, for the periods indicated.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

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

(American Beacon SiM High Yield Opportunities Fund℠) | ICE BofAML US High Yield Master II Index (Reflects no deduction for fees, expenses, or taxes)

rr_PerformanceAvailabilityWebSiteAddress

www.americanbeaconfunds.com

rr_ProspectusTable

rr_AverageAnnualReturnYear01

7.48%

rr_AverageAnnualReturnYear05

5.80%

(American Beacon SiM High Yield Opportunities Fund℠) | Class A

rr_AverageAnnualReturnSinceInception

6.61%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

4.75%

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

0.50%

^[1]

rr_ManagementFeesOverAssets

0.72%

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.10%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

1.07%

rr_FeeWaiverOrReimbursementOverAssets

none

^[2]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

1.07%

rr_ExpenseExampleYear01

$ 579

rr_ExpenseExampleYear03

799

rr_ExpenseExampleYear05

1,037

rr_ExpenseExampleYear10

$ 1,719

rr_AverageAnnualReturnInceptionDate

Feb. 14, 2011

rr_AverageAnnualReturnYear01

1.99%

rr_AverageAnnualReturnYear05

4.74%

(American Beacon SiM High Yield Opportunities Fund℠) | Class C

rr_AverageAnnualReturnSinceInception

6.01%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

rr_ManagementFeesOverAssets

0.72%

rr_DistributionAndService12b1FeesOverAssets

1.00%

rr_OtherExpensesOverAssets

0.13%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

1.85%

rr_FeeWaiverOrReimbursementOverAssets

none

^[2]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

1.85%

rr_ExpenseExampleYear01

$ 288

rr_ExpenseExampleYear03

582

rr_ExpenseExampleYear05

1,001

rr_ExpenseExampleYear10

2,169

rr_ExpenseExampleNoRedemptionYear01

188

rr_ExpenseExampleNoRedemptionYear03

582

rr_ExpenseExampleNoRedemptionYear05

1,001

rr_ExpenseExampleNoRedemptionYear10

$ 2,169

rr_AverageAnnualReturnInceptionDate

Feb. 14, 2011

rr_AverageAnnualReturnYear01

5.18%

rr_AverageAnnualReturnYear05

4.97%

(American Beacon SiM High Yield Opportunities Fund℠) | Class Y

rr_AverageAnnualReturnSinceInception

5.98%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.72%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.16%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

0.88%

rr_FeeWaiverOrReimbursementOverAssets

none

^[2]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

0.88%

rr_ExpenseExampleYear01

$ 90

rr_ExpenseExampleYear03

281

rr_ExpenseExampleYear05

488

rr_ExpenseExampleYear10

$ 1,084

rr_AverageAnnualReturnInceptionDate

Feb. 14, 2011

rr_AverageAnnualReturnYear01

7.28%

rr_AverageAnnualReturnYear05

6.11%

(American Beacon SiM High Yield Opportunities Fund℠) | Institutional Class

rr_AverageAnnualReturnSinceInception

7.12%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.72%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.15%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

0.87%

rr_FeeWaiverOrReimbursementOverAssets

(0.03%)

^[2]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

0.84%

rr_ExpenseExampleYear01

$ 86

rr_ExpenseExampleYear03

275

rr_ExpenseExampleYear05

479

rr_ExpenseExampleYear10

$ 1,070

rr_AverageAnnualReturnInceptionDate

Feb. 14, 2011

rr_AverageAnnualReturnYear01

7.32%

rr_AverageAnnualReturnYear05

6.19%

(American Beacon SiM High Yield Opportunities Fund℠) | Investor Class

rr_AverageAnnualReturnSinceInception

7.23%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.72%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.42%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

1.14%

rr_FeeWaiverOrReimbursementOverAssets

none

^[2]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

1.14%

rr_ExpenseExampleYear01

$ 116

rr_ExpenseExampleYear03

362

rr_ExpenseExampleYear05

628

rr_ExpenseExampleYear10

$ 1,386

Annual Return 2012

rr_AnnualReturn2012

20.15%

rr_AnnualReturn2013

7.41%

rr_AnnualReturn2014

4.01%

rr_AnnualReturn2015

(4.09%)

rr_AnnualReturn2016

15.88%

rr_AnnualReturn2017

7.12%

rr_YearToDateReturnLabel

The calendar year-to-date total return as of September 30, 2018 was 2.65%

rr_BarChartYearToDateReturn

2.65%

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

rr_HighestQuarterlyReturnLabel

Highest Quarterly Return: 6.99% 1st Quarter 2012 01/01/2012 through 12/31/2017

rr_BarChartHighestQuarterlyReturn

6.99%

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2012

rr_LowestQuarterlyReturnLabel

Lowest Quarterly Return: -3.55% 3rd Quarter 2015 01/01/2012 through 12/31/2017

rr_BarChartLowestQuarterlyReturn

(3.55%)

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

rr_AverageAnnualReturnInceptionDate

Feb. 14, 2011

rr_AverageAnnualReturnYear01

7.12%

rr_AverageAnnualReturnYear05

5.87%

(American Beacon SiM High Yield Opportunities Fund℠) | Investor Class | Returns After Taxes on Distributions

rr_AverageAnnualReturnSinceInception

6.83%

rr_ProspectusTable

rr_AverageAnnualReturnInceptionDate

Feb. 14, 2011

rr_AverageAnnualReturnYear01

4.81%

rr_AverageAnnualReturnYear05

2.89%

(American Beacon SiM High Yield Opportunities Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares

rr_AverageAnnualReturnSinceInception

3.91%

rr_ProspectusTable

rr_AverageAnnualReturnInceptionDate

Feb. 14, 2011

rr_AverageAnnualReturnYear01

4.01%

rr_AverageAnnualReturnYear05

3.13%

(American Beacon The London Company Income Equity Fund℠)

rr_AverageAnnualReturnSinceInception

3.99%

rr_ProspectusTable

rr_ObjectiveHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>

rr_ObjectivePrimaryTextBlock

The Fund's investment objective is current income, with a secondary objective of capital appreciation.

rr_ExpenseHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>

rr_ExpenseNarrativeTextBlock

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointDiscounts

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

rr_ShareholderFeesCaption

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b></div>

rr_OperatingExpensesCaption

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.

rr_ExpenseExampleHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Example</b></div>

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

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>

rr_PortfolioTurnoverHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>

rr_PortfolioTurnoverTextBlock

rr_PortfolioTurnoverRate

16.00%

rr_StrategyHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>

rr_StrategyNarrativeTextBlock

Under normal market conditions, at least 80% of the Fund's net assets (plus the amount of any borrowings for investment purposes) are invested in equity and equity-related investments. The Fund's investments in equity and equity-related investments include U.S. common stocks, preferred stocks, securities convertible into or exchangeable for common stock, American Depositary Receipts ("ADRs"), U.S. dollar-denominated foreign stocks traded on U.S. exchanges, real estate investment trusts ("REITs"), and income trusts. The Fund may also invest up to 20% of its net assets in fixed income instruments, primarily including trust preferred securities. The Fund may invest in issuers of any market capitalization and will typically hold 30 to 40 issuers.

The Fund's investment sub-advisor, The London Company of Virginia, LLC ("The London Company"), emphasizes investments in profitable, financially stable, core companies that focus on generating high dividend income, are run by shareholder-oriented management, and trade at reasonable valuations. The London Company also seeks companies with high return on capital, consistent free cash flow generation, predictability and stability. The London Company employs an investment process with bottom up, fundamental analysis and follows a strict sell discipline.

On a short-term basis, the Fund may invest cash balances in other investment companies, including money market funds, and may purchase and sell 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 on a short-term or long-term basis.

rr_RiskHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>

rr_RiskNarrativeTextBlock

There is no assurance that the Fund will achieve its investment objectives 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 are:

Credit Risk
The Fund is subject to the risk that the issuer or guarantor of a debt security, or the counterparty to a derivatives contract or a loan will fail to make timely payment of interest or principal or otherwise honor its obligations or default completely.

Equity Investments Risk
Equity securities are subject to market risk and investment risk. The Fund's investments in equity securities may include common stocks, preferred stocks, securities convertible into or exchangeable for common stocks, ADRs, U.S. dollar-denominated foreign stocks traded on U.S. exchanges, REITs and income trusts. Such investments may expose the Fund to additional risks.

Common Stock. 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.
Convertible Securities. Convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities' investment value. Convertible securities are also sensitive to movements in interest rates.
Depositary Receipts. 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 ADR or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.
Income Trusts. Income trusts are subject to credit risk, interest rate risk and dividend risk. Income trusts, which hold income producing assets and pass the income on to security holders, share many of the risks inherent in stock ownership and may lack diversification.
Preferred Stock. Preferred stocks are sensitive to movements in interest rates. Preferred stocks may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders.
REITs. Investments REITs are subject to the risks associated with investing in the real estate industry such as adverse developments affecting the real estate industry and real property values. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. 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, 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.

Focused Holdings Risk
Because the Fund may have a focused portfolio of fewer companies, the increase or decrease of the value of a single investment may have a greater impact on the Fund's net asset value ("NAV") and total return when compared to other diversified funds.

Futures Contracts Risk
Futures contracts are derivative instruments 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 that it would not be subject to if it invested directly in the securities underlying those derivatives. Futures contracts may experience potentially dramatic price changes (losses) and imperfect correlation between the price of the contract and the underlying security or index, 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).

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 may be unable to attain the high growth rates of successful smaller companies, especially during periods of economic expansion.

Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including money market funds. 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 and will be subject to the risks associated with investments in those companies. For example, money market funds are subject to interest rate risk, credit risk, and market risk.

Securities Lending Risk
To the extent the Fund lends its securities, it may be subject to the following risks: i) borrowers of the Fund's securities typically provide collateral in the form of cash that is reinvested in securities, ii) the securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers, iii) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund's ability to vote proxies or to settle transactions, and iv) there is the risk of possible loss of rights in the collateral should the borrower fail financially.

Segregated Assets Risk
In connection with certain transactions that may give rise to future payment obligations, including the purchase and sale of futures contracts, the Fund may be required to maintain a segregated amount of, or otherwise earmark, cash or liquid securities to cover the obligation. Segregated assets cannot be sold while the position they are covering is outstanding, unless they are replaced with other assets of equal value. The need to maintain cash or other liquid securities in segregated accounts could limit the Fund's ability to pursue other opportunities as they arise.

Small and Mid-Capitalization Companies Risk
Investing in the securities of small and mid-capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies. Since small and 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 expected changes in interest rates, borrowing costs and earnings. In general, these risks are greater for small-capitalization companies than for mid-capitalization companies.

Trust Preferred Securities Risk
Trust preferred securities are subject to market risk and credit risk. Holders of the trust preferred securities have limited voting rights to control the activities of the trust and no voting rights with respect to the parent company.

Value Stocks Risk
Value stocks are subject to the risk that their intrinsic value may never be realized by the market or that their prices may decline. 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 objectives 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

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>

rr_PerformanceNarrativeTextBlock

rr_BarChartHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Calendar year total returns for Investor Class Shares. Year Ended 12/31</b></div>

rr_BarChartClosingTextBlock

Highest Quarterly Return:
11.71% 1st Quarter 2013
01/01/2013 through 12/31/2017

Lowest Quarterly Return:
-6.38% 3rd Quarter 2015
01/01/2013 through 12/31/2017

The calendar year-to-date total return as of September 30, 2018 was 7.65%

rr_PerformanceTableHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> <b>Average annual total returns</b> for periods ended December 31, 2017 </b></div>

rr_PerformanceTableClosingTextBlock

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.

rr_PerformanceTableNotRelevantToTaxDeferred

rr_PerformanceTableExplanationAfterTaxHigher

Performance Information Illustrates Variability of Returns [Text]

rr_PerformancePastDoesNotIndicateFuture

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

rr_PerformanceInformationIllustratesVariabilityOfReturns

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

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

(American Beacon The London Company Income Equity Fund℠) | Russell 1000® Value Index (Reflects no deduction for fees, expenses, or taxes)

rr_PerformanceAvailabilityWebSiteAddress

www.americanbeaconfunds.com

rr_ProspectusTable

rr_AverageAnnualReturnYear01

13.66%

rr_AverageAnnualReturnYear05

14.04%

(American Beacon The London Company Income Equity Fund℠) | Class A

rr_AverageAnnualReturnSinceInception

14.72%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

0.50%

^[1]

rr_ManagementFeesOverAssets

0.65%

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.13%

rr_ExpensesOverAssets

1.03%

rr_ExpenseExampleYear01

$ 674

rr_ExpenseExampleYear03

884

rr_ExpenseExampleYear05

1,111

rr_ExpenseExampleYear10

$ 1,762

rr_AverageAnnualReturnInceptionDate

May 29, 2012

rr_AverageAnnualReturnYear01

7.47%

rr_AverageAnnualReturnYear05

11.63%

(American Beacon The London Company Income Equity Fund℠) | Class C

rr_AverageAnnualReturnSinceInception

11.42%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

rr_ManagementFeesOverAssets

0.65%

rr_DistributionAndService12b1FeesOverAssets

1.00%

rr_OtherExpensesOverAssets

0.16%

rr_ExpensesOverAssets

1.81%

rr_ExpenseExampleYear01

$ 284

rr_ExpenseExampleYear03

569

rr_ExpenseExampleYear05

980

rr_ExpenseExampleYear10

2,127

rr_ExpenseExampleNoRedemptionYear01

184

rr_ExpenseExampleNoRedemptionYear03

569

rr_ExpenseExampleNoRedemptionYear05

980

rr_ExpenseExampleNoRedemptionYear10

$ 2,127

rr_AverageAnnualReturnInceptionDate

May 29, 2012

rr_AverageAnnualReturnYear01

12.17%

rr_AverageAnnualReturnYear05

12.11%

(American Beacon The London Company Income Equity Fund℠) | Class Y

rr_AverageAnnualReturnSinceInception

11.77%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.65%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.14%

rr_ExpensesOverAssets

0.79%

rr_ExpenseExampleYear01

$ 81

rr_ExpenseExampleYear03

252

rr_ExpenseExampleYear05

439

rr_ExpenseExampleYear10

$ 978

rr_AverageAnnualReturnInceptionDate

May 29, 2012

rr_AverageAnnualReturnYear01

14.36%

rr_AverageAnnualReturnYear05

13.34%

(American Beacon The London Company Income Equity Fund℠) | Institutional Class

rr_AverageAnnualReturnSinceInception

13.00%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.65%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.08%

rr_ExpensesOverAssets

0.73%

rr_ExpenseExampleYear01

$ 75

rr_ExpenseExampleYear03

233

rr_ExpenseExampleYear05

406

rr_ExpenseExampleYear10

$ 906

rr_AverageAnnualReturnInceptionDate

May 29, 2012

rr_AverageAnnualReturnYear01

14.50%

rr_AverageAnnualReturnYear05

13.42%

(American Beacon The London Company Income Equity Fund℠) | Investor Class

rr_AverageAnnualReturnSinceInception

13.09%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.65%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.40%

rr_ExpensesOverAssets

1.05%

rr_ExpenseExampleYear01

$ 107

rr_ExpenseExampleYear03

334

rr_ExpenseExampleYear05

579

rr_ExpenseExampleYear10

$ 1,283

rr_AnnualReturn2013

26.62%

rr_AnnualReturn2014

16.74%

rr_AnnualReturn2015

(1.11%)

rr_AnnualReturn2016

10.67%

rr_AnnualReturn2017

14.06%

rr_YearToDateReturnLabel

The calendar year-to-date total return as of September 30, 2018 was 7.65%

rr_BarChartYearToDateReturn

7.65%

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

rr_HighestQuarterlyReturnLabel

Highest Quarterly Return: 11.71% 1st Quarter 2013 01/01/2013 through 12/31/2017

rr_BarChartHighestQuarterlyReturn

11.71%

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2013

rr_LowestQuarterlyReturnLabel

Lowest Quarterly Return: -6.38% 3rd Quarter 2015 01/01/2013 through 12/31/2017

rr_BarChartLowestQuarterlyReturn

(6.38%)

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

rr_AverageAnnualReturnInceptionDate

May 29, 2012

rr_AverageAnnualReturnYear01

14.06%

rr_AverageAnnualReturnYear05

13.03%

(American Beacon The London Company Income Equity Fund℠) | Investor Class | Returns After Taxes on Distributions

rr_AverageAnnualReturnSinceInception

12.71%

rr_ProspectusTable

rr_AverageAnnualReturnInceptionDate

May 29, 2012

rr_AverageAnnualReturnYear01

13.58%

rr_AverageAnnualReturnYear05

12.06%

(American Beacon The London Company Income Equity Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares

rr_AverageAnnualReturnSinceInception

11.79%

rr_ProspectusTable

rr_AverageAnnualReturnInceptionDate

May 29, 2012

rr_AverageAnnualReturnYear01

8.31%

rr_AverageAnnualReturnYear05

9.97%

(American Beacon Zebra Small Cap Equity Fund℠)

rr_AverageAnnualReturnSinceInception

9.81%

rr_ProspectusTable

rr_ObjectiveHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>

rr_ObjectivePrimaryTextBlock

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

rr_ExpenseHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>

rr_ExpenseNarrativeTextBlock

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointDiscounts

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

rr_ShareholderFeesCaption

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b></div>

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_OperatingExpensesCaption

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

December 31, 2019

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.

rr_ExpenseExampleHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Example</b></div>

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 the Example reflects the fee waiver/expense reimbursement arrangement for each share class through December 31, 2019. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

rr_ExpenseExampleNoRedemptionByYearCaption

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>

rr_PortfolioTurnoverHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>

rr_PortfolioTurnoverTextBlock

rr_PortfolioTurnoverRate

74.00%

rr_StrategyHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>

rr_StrategyNarrativeTextBlock

Under normal market conditions, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of small market capitalization U.S. companies. These companies have market capitalizations similar to the market capitalizations of the companies in the Russell 2000® Index at the time of investment.

The Russell 2000® Index is comprised of the 2000 smallest companies in the Russell 3000® Index based on total market capitalization. As of October 31, 2018, the market capitalizations of the companies in the Russell 2000® Index ranged from $13 million to $6.33 billion. In addition to common stocks, preferred stocks, American Depositary Receipts ("ADRs"), and securities convertible into or exchangeable for common stocks, the Fund may also invest in real estate investment trusts ("REITs") and master limited partnerships ("MLPs").

The Fund's sub-advisor, Zebra Capital Management, LLC ("Zebra"), seeks to capture a liquidity premium among fundamentally strong, publicly-traded equities. A liquidity premium is the additional return that may be realized on the sales of securities that are less liquid at the time of purchase. A liquidity premium may exist in public equity markets, as more liquid stocks tend to be priced at a premium, while less liquid stocks tend to be priced at a discount, thus having higher expected appreciation. Despite producing similar levels of earnings and cash flows, less liquid stocks can typically be purchased at lower prices, offering higher expected appreciation. Frequently, a fundamentally-sound stock is less traded because it has temporarily fallen out of favor. Over time, the market may recognize the inherent value of the stock again, where the Fund would stand to benefit from the liquidity premium as the stock's trading activity and price rise. Zebra chooses the securities that comprise the Fund's portfolio first by identifying stocks with strong fundamentals (i.e., earnings, book value, cash flows) that Zebra believes are undervalued in the market relative to their long-term appreciation potential. Zebra then applies the liquidity premium analysis to identify the stocks that trade less frequently than stocks with comparable fundamentals.

Stocks are typically sold when fundamentals deteriorate, trading activity increases relative to changes in a stock's fundamentals, or Zebra believes there are greater opportunities to capture liquidity premium in other stocks. On a short-term basis, the Fund may invest cash balances in other investment companies, including money market funds and may purchase and sell futures contracts to gain market exposure on cash balances or reduce market exposure in anticipation of liquidity needs. The Fund may lend its securities to broker-dealers and other institutions to earn additional income.

rr_RiskHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>

rr_RiskNarrativeTextBlock

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 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 are:

Equity Investments Risk
Equity securities are subject to market risk and investment risk. The Fund's investments in equity securities may include common stocks, preferred stocks, securities convertible into or exchangeable for common stocks, REITs, depositary receipts, and MLPs. Such investments may expose the Fund to additional risks.

Common Stock. 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.
Convertible Securities. Convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities' investment value. Convertible securities also are sensitive to movements in interest rates.
Depositary Receipts. Depositary receipts 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 ADR or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.
MLPs. Investing in MLPs involves certain risks related to investing in the underlying assets of the MLPs and risks associated with pooled investment vehicles. 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 may also make it more difficult 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").
Preferred Stock. Preferred stocks are sensitive to movements in interest rates. Preferred stocks may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders.
REITs. Investments in REITs are subject to the risks associated with investing in the real estate industry such as adverse developments affecting the real estate industry and real property values. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. 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 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.

Liquidity Risk
The Fund is susceptible to the risk that certain small cap equity investments held by the Fund may have limited marketability or be subject to restrictions on sale, and may be difficult or impossible to purchase or sell at favorable times or prices. The Fund could lose money if it is unable to dispose of an investment at a time that is most beneficial to the Fund. The Fund may be required to dispose of investments at unfavorable times or prices to satisfy obligations, which may result in losses or may be costly to the Fund. For example, the Fund may be forced to sell certain investments at unfavorable prices to meet redemption requests or other cash needs. Judgment plays a greater role in pricing illiquid investments than in investments with more active markets.

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. The value of a security may decline due to general market conditions which are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investment sentiment generally. Changes in the financial condition of a single issuer can impact a market as a whole. A rise in protectionist trade policies, and the possibility of changes to some international trade agreements, could affect the economies of many nations in ways that cannot necessarily be foreseen at the present time.

Model and Data Risk
The success of the sub-advisor's investment strategy depends largely on the effectiveness of its quantitative research models and investment programs. Models and data 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. 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. The programs may not react as expected to market events resulting in losses for the Fund. 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.

Small Capitalization Companies Risk
Investing in the securities of small capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies. Since smaller 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 expected changes in interest rates, borrowing costs and earnings.

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

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>

rr_PerformanceNarrativeTextBlock

The bar chart and table below provide an indication of risk of investing 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 performance compares to a broad-based market index, which is the Fund's benchmark index, for the periods indicated.

rr_BarChartHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Calendar year total returns for Investor Class Shares. Year Ended 12/31</b></div>

rr_BarChartClosingTextBlock

Highest Quarterly Return:
15.69% 4th Quarter 2011
01/01/2011 through 12/31/2017

Lowest Quarterly Return:
-18.05% 3rd Quarter 2011
1/1/2011 through 12/31/2017

The calendar year-to-date total return as of September 30, 2018 was 7.96%

rr_PerformanceTableHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> <b>Average annual total returns</b> for periods ended December 31, 2017 </b></div>

rr_PerformanceTableClosingTextBlock

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.

rr_PerformanceTableNotRelevantToTaxDeferred

rr_PerformanceTableExplanationAfterTaxHigher

Performance Information Illustrates Variability of Returns [Text]

rr_PerformancePastDoesNotIndicateFuture

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

rr_PerformanceInformationIllustratesVariabilityOfReturns

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

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

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

rr_PerformanceAvailabilityWebSiteAddress

www.americanbeaconfunds.com

rr_ProspectusTable

rr_AverageAnnualReturnYear01

14.65%

rr_AverageAnnualReturnYear05

14.12%

(American Beacon Zebra Small Cap Equity Fund℠) | Class A

rr_AverageAnnualReturnSinceInception

13.75%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

0.50%

^[1]

rr_ManagementFeesOverAssets

0.88%

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.41%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

1.54%

rr_FeeWaiverOrReimbursementOverAssets

(0.25%)

^[3]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

1.29%

rr_ExpenseExampleYear01

$ 699

rr_ExpenseExampleYear03

1,010

rr_ExpenseExampleYear05

1,344

rr_ExpenseExampleYear10

$ 2,284

rr_AverageAnnualReturnInceptionDate

Jun. 01, 2010

rr_AverageAnnualReturnYear01

2.78%

rr_AverageAnnualReturnYear05

13.12%

(American Beacon Zebra Small Cap Equity Fund℠) | Class C

rr_AverageAnnualReturnSinceInception

12.86%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

rr_ManagementFeesOverAssets

0.88%

rr_DistributionAndService12b1FeesOverAssets

1.00%

rr_OtherExpensesOverAssets

0.41%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

2.29%

rr_FeeWaiverOrReimbursementOverAssets

(0.24%)

^[3]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

2.05%

rr_ExpenseExampleYear01

$ 308

rr_ExpenseExampleYear03

692

rr_ExpenseExampleYear05

1,203

rr_ExpenseExampleYear10

2,607

rr_ExpenseExampleNoRedemptionYear01

208

rr_ExpenseExampleNoRedemptionYear03

692

rr_ExpenseExampleNoRedemptionYear05

1,203

rr_ExpenseExampleNoRedemptionYear10

$ 2,607

rr_AverageAnnualReturnInceptionDate

Sep. 01, 2010

rr_AverageAnnualReturnYear01

7.31%

rr_AverageAnnualReturnYear05

13.61%

(American Beacon Zebra Small Cap Equity Fund℠) | Class Y

rr_AverageAnnualReturnSinceInception

12.92%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.88%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.39%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

1.27%

rr_FeeWaiverOrReimbursementOverAssets

(0.27%)

^[3]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

1.00%

rr_ExpenseExampleYear01

$ 102

rr_ExpenseExampleYear03

376

rr_ExpenseExampleYear05

671

rr_ExpenseExampleYear10

$ 1,510

rr_AverageAnnualReturnInceptionDate

Jun. 01, 2010

rr_AverageAnnualReturnYear01

9.48%

rr_AverageAnnualReturnYear05

14.86%

(American Beacon Zebra Small Cap Equity Fund℠) | Institutional Class

rr_AverageAnnualReturnSinceInception

14.15%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.88%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.35%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

1.23%

rr_FeeWaiverOrReimbursementOverAssets

(0.33%)

^[3]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

0.90%

rr_ExpenseExampleYear01

$ 92

rr_ExpenseExampleYear03

358

rr_ExpenseExampleYear05

644

rr_ExpenseExampleYear10

$ 1,459

rr_AverageAnnualReturnInceptionDate

Jun. 01, 2010

rr_AverageAnnualReturnYear01

9.49%

rr_AverageAnnualReturnYear05

14.95%

(American Beacon Zebra Small Cap Equity Fund℠) | Investor Class

rr_AverageAnnualReturnSinceInception

14.25%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.88%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.56%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

1.44%

rr_FeeWaiverOrReimbursementOverAssets

(0.16%)

^[3]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

1.28%

rr_ExpenseExampleYear01

$ 130

rr_ExpenseExampleYear03

440

rr_ExpenseExampleYear05

772

rr_ExpenseExampleYear10

$ 1,710

Annual Return 2011

rr_AnnualReturn2011

(1.58%)

Annual Return 2012

rr_AnnualReturn2012

13.31%

rr_AnnualReturn2013

41.96%

rr_AnnualReturn2014

3.82%

rr_AnnualReturn2015

(4.06%)

rr_AnnualReturn2016

27.77%

rr_AnnualReturn2017

9.10%

rr_YearToDateReturnLabel

The calendar year-to-date total return as of September 30, 2018 was 7.96%

rr_BarChartYearToDateReturn

7.96%

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

rr_HighestQuarterlyReturnLabel

Highest Quarterly Return: 15.69% 4th Quarter 2011 01/01/2011 through 12/31/2017

rr_BarChartHighestQuarterlyReturn

15.69%

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2011

rr_LowestQuarterlyReturnLabel

Lowest Quarterly Return: -18.05% 3rd Quarter 2011 1/1/2011 through 12/31/2017

rr_BarChartLowestQuarterlyReturn

(18.05%)

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

rr_AverageAnnualReturnInceptionDate

Jun. 01, 2010

rr_AverageAnnualReturnYear01

9.10%

rr_AverageAnnualReturnYear05

14.54%

(American Beacon Zebra Small Cap Equity Fund℠) | Investor Class | Returns After Taxes on Distributions

rr_AverageAnnualReturnSinceInception

13.82%

rr_ProspectusTable

rr_AverageAnnualReturnInceptionDate

Jun. 01, 2010

rr_AverageAnnualReturnYear01

6.61%

rr_AverageAnnualReturnYear05

12.32%

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

rr_AverageAnnualReturnSinceInception

11.96%

rr_ProspectusTable

rr_AverageAnnualReturnInceptionDate

Jun. 01, 2010

rr_AverageAnnualReturnYear01

6.07%

rr_AverageAnnualReturnYear05

10.83%

(American Beacon Sound Point Floating Rate Income Fund℠)

rr_AverageAnnualReturnSinceInception

10.79%

rr_ProspectusTable

rr_ObjectiveHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>

rr_ObjectivePrimaryTextBlock

The Fund's investment objective is to seek to provide a high level of current income consistent with strong risk-adjusted returns.

rr_ExpenseHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. 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 14 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 31 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 and Waivers".

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointDiscounts

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

rr_ShareholderFeesCaption

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b></div>

rr_OperatingExpensesCaption

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesDeferredChargesTextBlock

A contingent deferred sales charge (''CDSC'') of 0.50% will be charged on certain purchases of $250,000 or more of A Class shares that are redeemed in whole or part within18 months of purchase.

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets provided in the Fund's Financial Highlights table, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.

rr_ExpenseExampleHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Example</b></div>

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

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>

rr_PortfolioTurnoverHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>

rr_PortfolioTurnoverTextBlock

rr_PortfolioTurnoverRate

69.00%

rr_StrategyHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>

rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in income-producing floating-rate loans and other floating-rate debt securities, which may include bonds, notes and debentures issued by corporations, and debt securities issued or guaranteed by the U.S. government or one of its agencies or instrumentalities. The Fund invests primarily in senior floating-rate loans ("Floating Rate Loans") which are made by banks and other large financial institutions to various companies and are senior in the borrowing companies' capital structure. Floating Rate Loans typically are of below investment grade quality (commonly referred to as "high yield" or "junk" bonds) and have below investment grade credit ratings, which ratings are associated with securities having high risk or speculative characteristics, or may be unrated but deemed by the sub-advisor to be of equivalent quality.

The sub-advisor utilizes a bottom-up, fundamental, research-intensive approach to achieve the Fund's objective by identifying fundamentally attractive Floating Rate Loans or variable-rate investments, which it considers undervalued, which pay interest at variable-rates on the basis of a base lending rate, such as the London Interbank Offered Rate ("LIBOR"), with or without a floor plus a fixed spread and other investments, including senior secured and unsecured bonds, and by creating a portfolio with an optimal blend of these securities. In managing the Fund, the sub-advisor seeks to invest in a portfolio of Floating Rate Loans that it believes will be less volatile over time than the general loan market. The sub-advisor considers preservation of capital when consistent with the Fund's investment objective. The Fund invests in securities without regard to maturity or duration.

The sub-advisor focuses on relative value across industries, within industries and within individual capital structures. Given the focus on relative value, the Fund has a target investment life cycle of 3 to 12 months and does not employ a "buy-and-hold" strategy. Therefore, the Fund may have high portfolio turnover. The sub-advisor generally sells a security when it believes its projected future return becomes unattractive relative to the rest of the portfolio or the investable universe.

The interest rates payable on Floating Rate Loans and other floating-rate debt securities are not fixed and may fluctuate based upon changes in market rates. The Floating Rate Loans in which the Fund invests typically have multiple reset periods during the year. As short-term interest rates decline, interest payable to the Fund typically decreases. Alternatively, during periods of increasing interest rates, changes in the interest rates of floating-rate securities may lag behind changes in market rates or may have limits on the maximum increases in interest rates. The amount of time that will pass before the Fund experiences the effects of changing short-term interest rates will depend on the dollar-weighted-average time until the next interest rate adjustment on the Fund's portfolio of loans. Loans typically have mandatory and optional prepayment provisions. Because of prepayments, the actual remaining maturity of a loan may be considerably less than its stated maturity. If a loan is prepaid, the Fund will have to reinvest the proceeds in other loans or securities, which may have a lower spread over its base rate. In such a case, the amount of interest paid to the Fund would likely decrease.

The Fund may invest a portion of its assets in high quality fixed-income securities, money market instruments, money market mutual funds, exchange-traded funds, or hold cash or cash equivalents in such amounts as the sub-advisor deems appropriate under certain circumstances, including when the sub-advisor believes the Fund needs to retain cash. Money market instruments, exchange-traded funds, or short-term debt securities held by the Fund for cash management or defensive investing purposes can fluctuate in value.

rr_RiskHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>

rr_RiskNarrativeTextBlock

Callable Securities Risk
The Fund may invest in fixed-income securities with call features. A call feature allows the issuer of the security to redeem or call the security prior to its stated maturity date. In periods of falling interest rates, issuers may be more likely to call in securities that are paying higher coupon rates than prevailing interest rates. In the event of a call, the Fund would lose the income that would have been earned to maturity on that security, and the proceeds received by the Fund may be invested in securities paying lower coupon rates and may not benefit from any increase in value that might otherwise result from declining interest rates.

Credit Risk
The Fund is subject to the risk that the issuer or guarantor of a debt security, or the counterparty to a transaction, including a derivatives contract or a loan will fail to make timely payment of interest or principal or otherwise honor its obligations or default completely. Credit risk is typically greater for securities with ratings that are below investment grade (commonly referred to as "junk bonds"). Since the Fund can invest significantly in lower-quality debt securities considered speculative in nature, this risk will be substantial. A downgrade or default affecting any of the Fund's securities could affect the Fund's performance.

Interest Rate Risk
The Fund is subject to the risk that the market value of fixed income securities it holds will decline due to rising interest rates. Generally, the value of investments with interest rate risk, such as fixed income securities, will move in the opposite direction to movements in interest rates. The Federal Reserve has raised the federal funds rate several times since December 2015 and has signaled additional increases in the near future. Interest rates may rise, perhaps significantly and/or rapidly, potentially resulting in substantial losses to the Fund. The prices of fixed income securities are also affected by their durations. Fixed income securities with longer durations generally have greater sensitivity to changes in interest rates. For example, if a bond has a duration of four years, a 1% increase in interest rates could be expected to result in a 4% decrease in the value of the bond. An increase in interest rates can impact markets broadly as well. Some investors buy securities and derivatives with borrowed money; an increase in interest rates can cause a decline in those markets.

Liquidity Risk
The Fund is susceptible to the risk that certain of the floating rate debt securities held by the Fund, such as structured notes and other derivative instruments, may have limited marketability or be subject to restrictions on sale, and may be difficult or impossible to purchase or sell at favorable times or prices. The Fund could lose money if it is unable to dispose of an investment at a time that is most beneficial to the Fund. The Fund may be required to dispose of investments at unfavorable times or prices to satisfy obligations, which may result in losses or may be costly to the Fund. For example, the Fund may be forced to sell certain investments at unfavorable prices to meet redemption requests or other cash needs. Judgment plays a greater role in pricing illiquid investments than in investments with more active markets.

Loan Interests Risk
In making investments in bank loans or senior loans, the Fund will depend primarily on the creditworthiness of the borrower for payment of principal and interest, and will also rely on the financial institution to make principal and interest payments to the Fund once it receives payment on the underlying loan. The Fund will also rely on the financial institution to pursue appropriate remedies against a borrower in the event that the borrower defaults. As such the Fund may be exposed to the credit risk of both the financial institution that made the loan and the underlying borrower. Unlike publicly traded common stocks which trade on national exchanges, there is no central place or exchange for loans, including bank loans and senior loans, to trade. Loans trade in an over-the-counter market, and confirmation and settlement, which are effected through standardized procedures and documentation, may take significantly longer than seven days to complete. Extended trade settlement periods may, in unusual market conditions with a high volume of shareholder redemptions, present a risk to shareholders regarding the Fund's ability to pay redemption proceeds within the allowable time periods stated in its prospectus. The secondary market for floating rate loans also may be subject to irregular trading activity and wide bid/ask spreads. The lack of an active trading market for certain loans may impair the ability of the Fund to sell its loan interests at a time when it may otherwise be desirable to do so or may require the Fund to sell them at prices that are less than what the Fund regards as their fair market value and may make it difficult to value such loans. Interests in loans made to finance highly leveraged companies or transactions, such as corporate acquisitions, may be especially vulnerable to adverse changes in economic or market conditions. The Fund may acquire a loan interest by obtaining an assignment of all or a portion of the interests in a particular loan that are held by an original lender or a prior assignee. As an assignee, the Fund normally will succeed to all rights and obligations of its assignor with respect to the portion of the loan that is being assigned. However, the rights and obligations acquired by the purchaser of a loan assignment may differ from, and be more limited than, those held by the original lenders or the assignor. Alternatively, the Fund may acquire a participation in a loan interest that is held by another party. When the Fund's loan interest is a participation, the Fund is subject to the risk that the party selling the participation interest will not remit the Fund's pro rata share of loan payments to the Fund, and the Fund may have less control over the exercise of remedies than the party selling the participation interest.

Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including money market funds and exchange-traded funds ("ETFs"). 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 and will be subject to the risks associated with investments in those companies. For example, money market funds are subject to interest rate risk, credit risk, and market risk. To the extent the Fund invests in ETFs that invest in equity securities, fixed income securities and/or foreign securities, or that track an index, the Fund would be subject to the risks associated with the underlying investments held by the ETF or the index fluctuations to which the ETF is subject. Because ETFs are listed on an exchange, they may be subject to trading halts, may trade at a discount or premium to their net asset value ("NAV") and may not be liquid. ETF shares may trade at a premium or discount to their NAV. An ETF that tracks an index may not precisely replicate the returns of its benchmark index.

Prepayment Risk
Prepayment risk is the risk that the principal amount of a bond may be repaid prior to the bond's maturity date. Due to a decline in interest rates or excess cash flow, a debt security may be called or otherwise prepaid before maturity. If this occurs, no additional interest will be paid on the investment and the Fund may have to invest at a lower rate, may not benefit from an increase in value that may result from declining interest rates, and may lose any premium it paid to acquire the security. Variable and floating rate securities may be less sensitive to prepayment risk.

Reliance on Corporate Management and Financial Reporting Risk
The Fund may trade various corporate debt instruments and collateralized debt securities. The sub-advisor may select investments for the Fund in part on the basis of information and data made directly available to the sub-advisor by the issuers of securities or through sources other than the issuers such as collateral pool servicers. The sub-advisor is dependent upon the integrity of the management of these issuers and of such servicers and the financial and collateral performance reporting processes in general.

Securities Selection Risk
Securities selected by the sub-advisor or the Manager for the Fund may not perform to expectations. It may not be possible to predict or to hedge against a widening in the yield of the securities selected by the sub-advisor. This could result in the Fund's underperformance compared to other funds with similar investment objectives.

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

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>

rr_PerformanceNarrativeTextBlock

On December 11, 2015, the Fund acquired all the assets and assumed all the liabilities of the Fund's predecessor. The SP Class shares and Institutional Class shares of the Fund have adopted the performance history and financial statements of the Investor Class shares and Institutional Class shares, respectively, of the Fund's predecessor. In the bar chart and table below, the performance of the Fund's Institutional Class shares for periods prior to December 11, 2015 is the performance of the Institutional Class shares of the Fund's predecessor. In the table below, the performance of the Fund's SP Class shares represents the performance of the predecessor Fund's Investor Class shares from May 31, 2014 through December 11, 2015.

The bar chart and table below provide an indication of the 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 discloses how the Fund's performance compares to a broad-based market index, which is the Fund's benchmark index and was the benchmark index of the Fund's predecessor, for the periods indicated.

rr_BarChartHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"> <b>Calendar year total returns for Institutional Class Shares. Year Ended 12/31</b></div>

rr_BarChartClosingTextBlock

Highest Quarterly Return:
2.68% 1st Quarter 2015
1/1/2013 through 12/31/2017

Lowest Quarterly Return:
-0.18% 4th Quarter 2015
1/1/2013 through 12/31/2017

The calendar year-to-date total return as of September 30, 2018 was 3.75%.

rr_PerformanceTableHeading

<div style="font-size:10pt;padding-top:2;padding-bottom:0;padding-left:0;"><b> <b>Average annual total returns</b> for periods ended December 31, 2017 </b></div>

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 Fund's Institutional Class shares; after-tax returns for other share classes will vary.

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.

rr_PerformanceTableNotRelevantToTaxDeferred

rr_PerformanceTableExplanationAfterTaxHigher

Performance Information Illustrates Variability of Returns [Text]

rr_PerformancePastDoesNotIndicateFuture

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

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows how the Fund's performance has varied from year to year. The table discloses how the Fund's performance compares to a broad-based market index, which is the Fund's benchmark index and was the benchmark index of the Fund's predecessor, for the periods indicated.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

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

(American Beacon Sound Point Floating Rate Income Fund℠) | Credit Suisse Leveraged Loan Index (Reflects no deduction for fees, expenses, or taxes)

rr_PerformanceAvailabilityWebSiteAddress

www.americanbeaconfunds.com

rr_ProspectusTable

rr_AverageAnnualReturnYear01

4.25%

rr_AverageAnnualReturnYear05

4.33%

(American Beacon Sound Point Floating Rate Income Fund℠) | Class A

rr_AverageAnnualReturnSinceInception

4.40%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

2.50%

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

0.50%

^[4]

rr_ManagementFeesOverAssets

0.70%

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.18%

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

1.15%

^[5]

rr_FeeWaiverOrReimbursementOverAssets

(0.01%)

^[6]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

1.16%

rr_ExpenseExampleYear01

$ 365

rr_ExpenseExampleYear03

607

rr_ExpenseExampleYear05

868

rr_ExpenseExampleYear10

$ 1,613

rr_AverageAnnualReturnInceptionDate

Dec. 11, 2015

rr_AverageAnnualReturnYear01

1.99%

rr_AverageAnnualReturnYear05

5.20%

(American Beacon Sound Point Floating Rate Income Fund℠) | Class C

rr_AverageAnnualReturnSinceInception

5.40%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

rr_ManagementFeesOverAssets

0.70%

rr_DistributionAndService12b1FeesOverAssets

1.00%

rr_OtherExpensesOverAssets

0.18%

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

1.90%

^[5]

rr_FeeWaiverOrReimbursementOverAssets

none

^[6]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

1.90%

rr_ExpenseExampleYear01

$ 293

rr_ExpenseExampleYear03

597

rr_ExpenseExampleYear05

1,026

rr_ExpenseExampleYear10

2,222

rr_ExpenseExampleNoRedemptionYear01

193

rr_ExpenseExampleNoRedemptionYear03

597

rr_ExpenseExampleNoRedemptionYear05

1,026

rr_ExpenseExampleNoRedemptionYear10

$ 2,222

rr_AverageAnnualReturnInceptionDate

Dec. 11, 2015

rr_AverageAnnualReturnYear01

2.69%

rr_AverageAnnualReturnYear05

5.41%

(American Beacon Sound Point Floating Rate Income Fund℠) | Class Y

rr_AverageAnnualReturnSinceInception

5.61%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.70%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.18%

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

0.90%

^[5]

rr_FeeWaiverOrReimbursementOverAssets

none

^[6]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

0.90%

rr_ExpenseExampleYear01

$ 92

rr_ExpenseExampleYear03

287

rr_ExpenseExampleYear05

498

rr_ExpenseExampleYear10

$ 1,108

rr_AverageAnnualReturnInceptionDate

Dec. 11, 2015

rr_AverageAnnualReturnYear01

4.81%

rr_AverageAnnualReturnYear05

5.85%

(American Beacon Sound Point Floating Rate Income Fund℠) | Institutional Class

rr_AverageAnnualReturnSinceInception

6.05%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.70%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.12%

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

0.84%

^[5]

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

^[6]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

0.86%

rr_ExpenseExampleYear01

$ 88

rr_ExpenseExampleYear03

270

rr_ExpenseExampleYear05

468

rr_ExpenseExampleYear10

$ 1,039

rr_AnnualReturn2013

7.87%

rr_AnnualReturn2014

4.21%

rr_AnnualReturn2015

5.00%

rr_AnnualReturn2016

7.75%

rr_AnnualReturn2017

4.97%

rr_YearToDateReturnLabel

The calendar year-to-date total return as of September 30, 2018 was 3.75%

rr_BarChartYearToDateReturn

3.75%

rr_BarChartYearToDateReturnDate

Sep. 30, 2018

rr_HighestQuarterlyReturnLabel

Highest Quarterly Return: 2.68% 1st Quarter 2015 1/1/2013 through 12/31/2017

rr_BarChartHighestQuarterlyReturn

2.68%

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2015

rr_LowestQuarterlyReturnLabel

Lowest Quarterly Return: -0.18% 4th Quarter 2015 1/1/2013 through 12/31/2017

rr_BarChartLowestQuarterlyReturn

(0.18%)

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2015

rr_AverageAnnualReturnInceptionDate

Dec. 03, 2012

rr_AverageAnnualReturnYear01

4.97%

rr_AverageAnnualReturnYear05

5.95%

(American Beacon Sound Point Floating Rate Income Fund℠) | Institutional Class | Returns After Taxes on Distributions

rr_AverageAnnualReturnSinceInception

6.15%

rr_ProspectusTable

rr_AverageAnnualReturnInceptionDate

Dec. 03, 2012

rr_AverageAnnualReturnYear01

2.83%

rr_AverageAnnualReturnYear05

3.51%

(American Beacon Sound Point Floating Rate Income Fund℠) | Institutional Class | Returns After Taxes on Distributions and Sales of Fund Shares

rr_AverageAnnualReturnSinceInception

3.74%

rr_ProspectusTable

rr_AverageAnnualReturnInceptionDate

Dec. 03, 2012

rr_AverageAnnualReturnYear01

2.79%

rr_AverageAnnualReturnYear05

3.43%

(American Beacon Sound Point Floating Rate Income Fund℠) | Investor Class

rr_AverageAnnualReturnSinceInception

3.61%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.70%

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.34%

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

1.06%

^[5]

rr_FeeWaiverOrReimbursementOverAssets

none

^[6]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

1.06%

rr_ExpenseExampleYear01

$ 108

rr_ExpenseExampleYear03

337

rr_ExpenseExampleYear05

585

rr_ExpenseExampleYear10

$ 1,294

rr_AverageAnnualReturnInceptionDate

Dec. 11, 2015

rr_AverageAnnualReturnYear01

4.64%

rr_AverageAnnualReturnYear05

5.77%

(American Beacon Sound Point Floating Rate Income Fund℠) | Class SP

rr_AverageAnnualReturnSinceInception

5.97%

Maximum sales charge imposed on purchases (as a percentage of offering price)

rr_ProspectusTable

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

rr_ManagementFeesOverAssets

0.70%

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.09%

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Fee waiver and/or Expense reimbursement or recoupment

rr_ExpensesOverAssets

1.06%

^[5]

rr_FeeWaiverOrReimbursementOverAssets

(0.11%)

^[6]

Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment

rr_NetExpensesOverAssets

1.17%

rr_ExpenseExampleYear01

$ 119

rr_ExpenseExampleYear03

348

rr_ExpenseExampleYear05

595

rr_ExpenseExampleYear10

$ 1,304

rr_AverageAnnualReturnInceptionDate

May 31, 2014

rr_AverageAnnualReturnYear01

4.73%

rr_AverageAnnualReturnYear05

5.75%