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(American Beacon Flexible Bond Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks to provide a positive total return regardless of market conditions.
Expense [Heading] rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Narrative [Text Block] 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 25 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 44 of the statement of additional information ("SAI").
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in all classes of the American Beacon Funds on an aggregated basis.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text] rr_OperatingExpensesCaption

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

Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination December 31, 2017
Expenses Deferred Charges [Text Block] 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.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] 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.
Expense Example [Heading] rr_ExpenseExampleHeading

Example
Expense Example Narrative [Text Block] 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, 2017. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption of shares:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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. The Fund's portfolio turnover rate for the Fund's last fiscal year was 162% of the average value of the portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 162.00%
Strategy [Heading] rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund's investment approach is flexible, allocating investments across a wide range of investment opportunities globally in an attempt to achieve positive total return regardless of market conditions. The Fund seeks to achieve its investment objective by investing, under normal market conditions, at least 80% of its net assets, plus borrowings for investment purposes, in fixed-income instruments of varying maturities and derivative instruments that provide exposure to fixed income instruments. Fixed-income instruments include obligations issued or guaranteed by the U.S. and non-U.S. governments, their agencies or instrumentalities and political subdivisions, inflation-index-linked securities, debt securities of supranational organizations, quasi-sovereign debt, emerging markets debt, corporate bonds, convertible and non-convertible debt, municipal securities, Rule 144A securities, variable and floating-rate securities, commercial paper, mortgage-backed securities (commercial and residential), repurchase agreements and reverse repurchase agreements, bank certificates of deposit, fixed time deposits and bankers' acceptances, collateralized mortgage obligations ("CMO") and other mortgage-related products, asset-backed securities, money market funds, bank loans and loan participation interests. The Fund invests in fixed-income instruments without restrictions on their credit quality although, under normal market conditions, the Fund's investments in non-investment grade securities ( commonly referred to as high yield or "junk" bonds) is limited to 40% of the Fund's total assets. The Fund will maintain a weighted-average credit quality of investment grade under normal market conditions. The Fund may invest a significant portion of its assets in a particular geographic region or country, including emerging markets.

The Fund's investments in derivatives may include options, futures, forwards, warrants, swaps, structured notes and similar instruments. The Fund uses derivative instruments to enhance total return, to hedge against fluctuations in securities prices, interest rates or currency exchange rates, to change the effective duration of its portfolio, to manage certain investment risks or as a substitute for the purchase or sale of the underlying currencies or securities. The Fund's use of derivatives may be extensive.

The Fund also may have significant exposure to foreign currencies for investment or hedging purposes by purchasing or selling forward currency exchange contracts (including non-deliverable forwards, "NDFs") in non-U.S. or emerging market currencies, non-U.S. currency futures contracts, options on non-U.S. currencies and non-U.S. currency futures and swaps for cross-currency investments. 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 Fund's investments may expose the Fund to U.S. and foreign interest rates. The Fund may also make equity investments, including preferred stocks, common stocks and real estate investment trusts ("REITs"). The Fund may invest in companies of all market capitalizations.

In selecting investments for the Fund, the Fund's sub-advisors develop long- and short-term views of global economic themes suggested by macro-economic factors, interest rates, market cycles, credit cycles and other relevant factors. The sub-advisors seek to capitalize on these themes by investing where opportunities exist by either making long investments where they believe favorable return conditions exist, or by establishing short positions where the lack of absolute return opportunities could result in favorable returns for a short position. The sub-advisors examine the relative risk and return characteristics of each investment to determine the ultimate positioning of their individual portfolios. The sub-advisors sell securities when their economic views change and an investment idea, based on its return potential or level of risk, no longer fits within their overall macro strategy or when better ideas are identified.

The Fund's weighted-average portfolio duration may range from -5 to +8 years depending upon the sub-advisors' forecast of interest rates and assessment of market risk generally. Duration is a measure of the life expectancy of a fixed-income security that is used to determine the sensitivity of a security's price to changes in interest rates. Generally, the price of a security with a positive duration will fall when interest rates rise, and vice versa. Moreover, larger absolute values of duration typically correspond to larger price changes. A duration of "eight years" means that a security's price would be expected to decrease by approximately 8% with a 1% increase in interest rates, and a negative duration of five years generally will increase the price of the security by 5%. The Fund may have a negative weighted-average duration through the use of short futures, put option positions and total return swaps. Such instruments have durations roughly equal to the negative duration of the securities that underlie the positions and have the effect of reducing portfolio duration by approximately the same amount as selling an equivalent amount of the underlying securities.

The Fund is non-diversified, which means that it is not limited to a percentage of assets that it may invest in any one issuer.
Risk [Heading] rr_RiskHeading

Principal Risks

Risk Narrative [Text Block] 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:

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, including CMOs, 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. 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 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. 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 making direct investments in non-U.S. currencies or in securities denominated in non-U.S. currencies, purchasing or selling forward currency exchange contracts in non-U.S. currencies, non-U.S. currency futures contracts, options on non-U.S. currencies and non-U.S. currency futures, and swaps for cross-currency transaction. 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. It is not possible for the Fund 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. 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 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. 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 and forward contracts, including NDFs, are derivative instruments pursuant to a contract where one party pays 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, including NDFs, 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, including NDFs, 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.

  • Options. In order for a call option to be profitable, the market price of the underlying security or index must rise sufficiently above the call option exercise price to cover the premium and transaction costs. These costs will reduce any profit that might otherwise have been realized had the Fund bought the underlying security instead of the call option. For a put option to be profitable, the market price of the underlying security or index must decline sufficiently below the put option's exercise price to cover the premium and transaction costs. By using put options in this manner, the Fund will reduce any profit it might otherwise have realized from having shorted the declining underlying security by the premium paid for the put option and by transaction costs. If an option that the Fund has purchased expires unexercised, the Fund will experience a loss in the amount of the premium it paid. If the Fund sells a put option, there is a risk that the Fund may be required to buy the underlying asset at a disadvantageous price. If the Fund sells a call option on an underlying asset that the Fund owns and the underlying asset has increased in value when the call option is exercised, the Fund will be required to sell the underlying asset at the call price and will not be able to realize any of the underlying asset's value above the call price. If a call option that the Fund has sold is exercised, the Fund will experience a gain or loss from the sale of the underlying instrument.

  • 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. Equity swaps are subject to equity investments risk, liquidity risk and counterparty risk. Total return swaps and currency 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.

  • Warrants. Warrants may be more speculative than certain other types of investments because warrants do not carry with them dividend or voting rights with respect to the underlying securities, or any rights in the assets of the issuer. In addition, the value of a warrant does not necessarily change with the value of the underlying securities and a warrant ceases to have value if it is not exercised prior to its expiration date. The market for warrants may be very limited and there may at times not be a liquid secondary market for warrants.

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 and REITs. 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.

  • 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 net income and 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. 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.

Flexible Strategy Risk
The Fund uses a variety of investment strategies seeking to provide a positive total return regardless of market conditions. The sub-advisors do not attempt to keep the portfolio structure or the Fund's performance consistent with any designated stock, bond or market index, and during times of market rallies, the Fund may not perform as well as other funds that seek to outperform an index. Over time, the investment performance of flexible strategies is typically substantially independent of longer term movements in the stock and bond market. Interest rate levels and currency valuations will not always respond as the sub-advisors expect and portfolio securities may remain over- or under-valued.

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 price volatility, (6) less 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.

High Portfolio Turnover Risk
Portfolio turnover is a measure of the Fund's trading activity over a one-year period. A portfolio turnover rate of 100% would indicate that the Fund sold and replaced the entire value of its securities holdings during the period. High portfolio turnover could increase the Fund's transaction costs, have a negative impact on performance, and generate higher capital gain distributions to shareholders than if the Fund has a lower portfolio turnover rate.

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.

Inflation Index Linked Securities Risk
Unlike a conventional bond, whose issuer makes regular fixed interest payments and repays the face value of the bond at maturity, an inflation index linked security provides interest payments that vary as the principal and/or interest, are adjusted over time to reflect a rise (inflation) or a drop (deflation) in the reference index. Repayment of the original principal upon maturity (as adjusted for inflation) is guaranteed in the case of U.S. Treasury inflation-indexed debt securities. For inflation-linked securities that do not provide a similar guarantee, the adjusted principal value of the securities repaid at maturity may be less than the original principal value. The value of inflation-linked securities is expected to change in response to real interest rates. The price of an inflation-linked security generally falls when real interest rates rise and rises when real interest rates fall.

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 raised the federal funds rate in December 2016, marking only the second such interest rate hike in nearly a decade. The Federal Reserve has signaled additional increases in 2017. 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 duration. Fixed income securities or derivatives with longer duration generally have greater sensitivity to changes in interest rates. An increase in interest rates can impact markets broadly as well. For example, 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, 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.

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.

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 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
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. There is a risk that the value of any collateral securing a loan in which the Fund has an interest may decline and that the collateral may not be sufficient to cover the amount owed on the loan. In the event the borrower defaults, the Fund's access to the collateral may be limited or delayed by bankruptcy or other insolvency laws. 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. 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 that 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.

Multiple Sub-Advisor Risk
The Manager may allocate a Fund's assets among multiple sub-advisors, each of which is responsible for investing its allocated portion of the Fund's assets. To a significant extent, a Fund's performance will depend on the success of the Manager in allocating the Fund's assets to sub-advisors and its selection and oversight of the sub-advisors.

Non-Diversification Risk
The Fund is non-diversified, which means the Fund may focus its investments in the securities of a comparatively small number of issuers. Investments in securities of a limited number of issuers exposes the Fund to greater market risk and potential losses than if assets were diversified among the securities of a greater number of issuers.

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, you will indirectly bear 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 funds. Money market funds are subject to interest rate risk, credit risk, and market risk.

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 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 heavy redemptions that could cause the Fund to sell assets at inopportune times or at a loss or depressed value. Redemption risk is heightened during periods of declining or illiquid markets. Heavy redemptions could hurt the Fund's performance.

Repurchase Agreement and Reverse Repurchase Agreement Risk
The use of repurchase agreements, involves counterparty risk and credit risk. There is also the risk that the seller of the agreement may become insolvent and subject to liquidation. Using reverse repurchase agreements to earn additional income involves the risk that the interest earned on the invested proceeds is less than the expense of the reverse repurchase agreement transaction. This technique may also have a leveraging effect on the Fund's portfolio, although the Fund's intent to cover these positions minimizes this effect.

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. The Fund may not be able to sell a restricted security when the sub-advisor 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.

Securities Lending Risk
To the extent the Fund lends its securities, it may be subject to the following risks. Borrowers of the Fund's securities typically provide collateral in the form of cash that is reinvested in securities. The securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers. In addition, 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 there is the risk of possible loss of rights in the collateral should the borrower fail financially.

Securities Selection Risk
Securities selected by the sub-advisors 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.

Short Position Risk
The Fund's losses are potentially unlimited in a short position transaction because there is potentially no limit on the amount that the security that the Fund is required to purchase may have appreciated. Because the Fund may invest the proceeds of a short sale, another effect of short selling on the Fund is similar to the effect of leverage, in that it may amplify changes in the Fund's NAV since it may increase the exposure of the Fund to certain markets.

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 limited operating history, product lines, and financial resources, 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.

Sovereign and Quasi Sovereign Debt Risk
The Fund normally will have significant investments in sovereign and quasi-sovereign debt securities. These investments are subject to risk of payment delays or defaults due to (1) country cash flow problems, (2) insufficient foreign currency reserves, (3) political considerations, (4) large debt positions relative to the country's economy, (5) policies toward foreign lenders or investors, (6) the failure to implement economic reforms required by the International Monetary Fund or other multilateral agencies, or (7) an inability or unwillingness to repay debts. It may be particularly difficult to enforce the rights of debt holders in frontier and emerging markets. A governmental entity that defaults on an obligation may request additional time in which to pay or further loans or may seek to restructure its obligations to reduce interest rates or outstanding principal. There is no legal process for collecting sovereign and quasi-sovereign debt that a government does not pay nor are there bankruptcy proceedings through which all or part of the sovereign debt that a governmental entity has not repaid may be collected. Sovereign and quasi-sovereign debt risk is increased for emerging and frontier markets issuers, which are among the largest debtors to commercial banks and foreign governments. At times, certain emerging market countries have declared moratoria on the payment of principal and interest on external debt. Certain emerging market countries have experienced difficulty in servicing their sovereign debt on a timely basis, which has led to defaults and the restructuring of certain indebtedness.

Supranational Risk
Obligations of supranational entities are subject to the risk that the governments on whose support the entity depends for its financial backing or repayment may be unable or unwilling to provide that support. Obligations of a supranational entity that are denominated in non-U.S. currencies will also be subject to the risks associated with investments in non-U.S. currencies.

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 Banks ("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. Government securities and securities of government sponsored entities are subject to credit, 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.

Variable and Floating Rate Securities Risk
The interest rates payable on variable and floating-rate securities are not fixed and may fluctuate based upon changes in market rates. The interest rate on a floating rate security is a variable rate which is tied to another interest rate, such as a money-market index or Treasury bill rate. Variable and floating rate securities are subject to interest rate risk and credit risk.

As short-term interest rates decline, interest payable on floating-rate securities typically decreases. Alternatively, during periods of rising interest rates, interest payable on floating-rate securities typically increases. Changes in the interest rates of floating-rate securities may lag behind changes in market rates or may have limits on the maximum rate change for a given period of time. The value of floating-rate securities may decline if their interest rates do not rise as much, or as quickly, as interest rates in general. Conversely, floating rate securities will not generally increase in value if interest rates decline.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk The Fund is non-diversified, which means the Fund may focus its investments in the securities of a comparatively small number of issuers. Investments in securities of a limited number of issuers exposes the Fund to greater market risk and potential losses than if assets were diversified among the securities of a greater number of issuers.
Risk Lose Money [Text] 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.
Risk Not Insured Depository Institution [Text] 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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The bar chart and table below provide an indication of risk by showing how the Fund's performance has varied from year to year. The table shows how the Fund's performance compares to the BofA Merrill Lynch 3-Month LIBOR Constant Maturity Index, which is the Fund's benchmark index, and the Bloomberg Barclays U.S. Aggregate Index, an additional broad-based securities market index with characteristics that are similar to those of the Fund.

The chart and the table below show the performance of the Fund's Investor Class shares for all periods. The Fund began offering all shares classes on July 5, 2011. 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.
Bar Chart [Heading] rr_BarChartHeading

Calendar year total returns for Investor Class Shares. Year Ended 12/31
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarterly Return:
2.89% 1st Quarter 2012
1/1/2012 through 12/31/2015

Lowest Quarterly Return:
-3.53% 3rd Quarter 2015
1/1/2012 through 12/31/2015

The calendar year-to-date total return as of September 30, 2016 was 3.29%.

Performance Table Heading rr_PerformanceTableHeading

Average annual total returns for periods ended December 31, 2015

Performance Table Closing [Text Block] 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 hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares; after-tax returns for other share classes will vary.
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred If you hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account or a 401(k) plan, the after-tax returns do not apply to your situation.
Performance Table Explanation after Tax Higher 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 Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide an indication of risk by showing how the Fund's performance has varied from year to year. The table shows how the Fund's performance compares to the BofA Merrill Lynch 3-Month LIBOR Constant Maturity Index, which is the Fund's benchmark index, and the Bloomberg Barclays U.S. Aggregate Index, an additional broad-based securities market index with characteristics that are similar to those of the Fund.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Investor Class shares; after-tax returns for other share classes will vary.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.americanbeaconfunds.com
(American Beacon Flexible Bond Fund℠) | BofA Merrill Lynch 3 Month Libor Constant Maturity Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.23%
Since Inception rr_AverageAnnualReturnSinceInception 0.31%
(American Beacon Flexible Bond Fund℠) | Bloomberg Barclays U.S. Aggregate Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 0.55%
Since Inception rr_AverageAnnualReturnSinceInception 6.60%
(American Beacon Flexible Bond Fund℠) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) 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]
Management Fees rr_ManagementFeesOverAssets 0.90% [2]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.37%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.53% [3]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.23%) [4]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.30%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 601
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 914
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,249
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,193
1 Year rr_AverageAnnualReturnYear01 (3.09%)
Since Inception rr_AverageAnnualReturnSinceInception 1.13%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 05, 2011
(American Beacon Flexible Bond Fund℠) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management Fees rr_ManagementFeesOverAssets 0.90% [2]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.36%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.27% [3]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.22%) [4]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 2.05%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 308
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 688
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,195
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,588
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 208
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 688
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,195
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,588
1 Year rr_AverageAnnualReturnYear01 (3.81%)
Since Inception rr_AverageAnnualReturnSinceInception 0.52%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 05, 2011
(American Beacon Flexible Bond Fund℠) | Class Y  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.90% [2]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.29%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.20% [3]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.20%) [4]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.00%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 102
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 361
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 640
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,436
1 Year rr_AverageAnnualReturnYear01 (2.73%)
Since Inception rr_AverageAnnualReturnSinceInception 1.49%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 05, 2011
(American Beacon Flexible Bond Fund℠) | Institutional Class  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.90% [2]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.23%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.14% [3]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.23%) [4]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 0.91%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 93
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 340
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 606
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,367
1 Year rr_AverageAnnualReturnYear01 (2.67%)
Since Inception rr_AverageAnnualReturnSinceInception 1.58%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 05, 2011
(American Beacon Flexible Bond Fund℠) | Investor Class  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.90% [2]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.52%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.43% [3]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.15%) [4]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.28%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 130
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 437
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 767
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,700
Annual Return 2012 rr_AnnualReturn2012 8.65%
Annual Return 2013 rr_AnnualReturn2013 (1.64%)
Annual Return 2014 rr_AnnualReturn2014 0.96%
Annual Return 2015 rr_AnnualReturn2015 (3.09%)
Year to Date Return, Label rr_YearToDateReturnLabel The calendar year-to-date total return as of September 30, 2016 was 3.29%.
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 3.29%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2016
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 2.89% 1st Quarter 2012 1/1/2012 through 12/31/2015
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 2.89%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -3.53% 3rd Quarter 2015 1/1/2012 through 12/31/2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (3.53%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2015
1 Year rr_AverageAnnualReturnYear01 (3.09%)
Since Inception rr_AverageAnnualReturnSinceInception 1.27%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 05, 2011
(American Beacon Flexible Bond Fund℠) | Investor Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.57%)
Since Inception rr_AverageAnnualReturnSinceInception 0.18%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 05, 2011
(American Beacon Flexible Bond Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.74%)
Since Inception rr_AverageAnnualReturnSinceInception 0.55%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 05, 2011
(American Beacon SiM High Yield Opportunities Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund's investment objective is to seek high current income and, secondarily, capital appreciation.
Expense [Heading] rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Narrative [Text Block] 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 33 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 45 of the statement of additional information ("SAI").
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in all classes of the American Beacon Funds on an aggregated basis.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text] rr_OperatingExpensesCaption

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

Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination December 31, 2017
Expenses Deferred Charges [Text Block] 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.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] 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.
Expense Example [Heading] rr_ExpenseExampleHeading

Example
Expense Example Narrative [Text Block] 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 the Institutional Class through December 31, 2017. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption of shares:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 57% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 57.00%
Strategy [Heading] rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

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 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, swaps 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.

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.
Risk [Heading] rr_RiskHeading

Principal Risks

Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your money by investing 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. 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 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. 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 may decline in value relative to the U.S. dollar and 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. It is not possible for the Fund 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. 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 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. 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 and forward contracts, are derivative instruments pursuant to a contract where one party pays 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.

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 generally subject to the same risks of investing in the foreign securities that they evidence or into which they may be converted, 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 IDS, 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.

  • 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 net income and 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. 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.

  • Preferred Stock. 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.

Floating Rate Securities Risk
The interest rates payable on floating rate securities are not fixed and may fluctuate based upon changes in market rates. The interest rate on a floating rate security is a variable rate which is tied to another interest rate, such as a money-market index or Treasury bill rate. Floating rate securities are subject to interest rate risk and credit risk.

As short-term interest rates decline, interest payable on floating rate securities typically decreases. Alternatively, during periods of rising interest rates, interest payable on floating-rate securities typically increases. 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 value of floating rate securities may decline if their interest rates do not rise as much, or as quickly, as interest rates in general. Conversely, 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 price volatility, (6) less 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.

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 raised the federal funds rate in December 2016, marking only the second such interest rate hike in nearly a decade. The Federal Reserve has signaled additional increases in 2017. 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 duration. Fixed income securities or derivatives with longer duration 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 a 8% decrease in the value of the bond. An increase in interest rates can impact markets broadly as well. For example, 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, 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 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
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. There is a risk that the value of any collateral securing a loan in which the Fund has an interest may decline and that the collateral may not be sufficient to cover the amount owed on the loan. In the event the borrower defaults, the Fund's access to the collateral may be limited or delayed by bankruptcy or other insolvency laws. 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. 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 that 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 funds. For example, to the extent the Fund invests in ETFs that invest in equity securities, fixed income securities and/or foreign securities, or track an index, the Fund is 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.

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 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 heavy redemptions that could cause the Fund to sell assets at inopportune times or at a loss or depressed value. 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. The Fund may not be able to sell a restricted security when the sub-advisor 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.

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 Banks ("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. Government securities and securities of government sponsored entities are subject to credit, 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.
Risk Lose Money [Text] rr_RiskLoseMoney There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your money by investing in the Fund.
Risk Not Insured Depository Institution [Text] 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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The bar chart and table below provide an indication of the risk of investing in the Fund by showing 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.

The chart and the table below show the performance of the Fund's Investor Class shares for all periods. The Fund began offering all shares classes on February 14, 2011. 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.
Bar Chart [Heading] rr_BarChartHeading

Calendar year total returns for Investor Class Shares. Year Ended 12/31
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarterly Return:
6.99% 1st Quarter 2012
1/1/2012 through 12/31/2015

Lowest Quarterly Return:
-3.55% 2nd Quarter 2015
1/1/2012 through 12/31/2015

The calendar year-to-date total return as of September 30, 2016 was 12.92%

Performance Table Heading rr_PerformanceTableHeading

Average annual total returns for periods ended December 31, 2015

Performance Table Closing [Text Block] 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 hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares; after-tax returns for other share classes will vary.
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred If you hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account or a 401(k) plan, the after-tax returns do not apply to your situation.
Performance Table Explanation after Tax Higher 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 Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide an indication of the risk of investing in the Fund by showing 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.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Investor Class shares; after-tax returns for other share classes will vary.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.americanbeaconfunds.com
(American Beacon SiM High Yield Opportunities Fund℠) | BofA Merrill Lynch U.S. High Yield Master II Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.64%)
Since Inception rr_AverageAnnualReturnSinceInception 4.33%
(American Beacon SiM High Yield Opportunities Fund℠) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) 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% [5]
Management Fees rr_ManagementFeesOverAssets 0.75% [6]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.23%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.24% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.01%) [8]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.25%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 595
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 850
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,123
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,914
1 Year rr_AverageAnnualReturnYear01 (4.11%)
Since Inception rr_AverageAnnualReturnSinceInception 4.92%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 14, 2011
(American Beacon SiM High Yield Opportunities Fund℠) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management Fees rr_ManagementFeesOverAssets 0.75% [6]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.22%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.98% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.02%) [8]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 2.00%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 301
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 621
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,067
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,306
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 201
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 621
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,067
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,306
1 Year rr_AverageAnnualReturnYear01 (4.79%)
Since Inception rr_AverageAnnualReturnSinceInception 4.19%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 14, 2011
(American Beacon SiM High Yield Opportunities Fund℠) | Class Y  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.75% [6]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.16%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.92% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets none [8]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 0.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 94
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 294
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 510
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,132
1 Year rr_AverageAnnualReturnYear01 (3.82%)
Since Inception rr_AverageAnnualReturnSinceInception 5.30%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 14, 2011
(American Beacon SiM High Yield Opportunities Fund℠) | Institutional Class  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.75% [6]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.16%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.92% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.07%) [8]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 0.85%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 87
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 287
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 503
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,125
1 Year rr_AverageAnnualReturnYear01 (3.73%)
Since Inception rr_AverageAnnualReturnSinceInception 5.44%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 14, 2011
(American Beacon SiM High Yield Opportunities Fund℠) | Investor Class  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.75% [6]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.42%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.18% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.01%) [8]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.19%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 120
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 375
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 650
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,433
Annual Return 2012 rr_AnnualReturn2012 20.15%
Annual Return 2013 rr_AnnualReturn2013 7.41%
Annual Return 2014 rr_AnnualReturn2014 4.01%
Annual Return 2015 rr_AnnualReturn2015 (4.09%)
Year to Date Return, Label rr_YearToDateReturnLabel The calendar year-to-date total return as of September 30, 2016 was 12.92%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 12.92%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2016
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 6.99% 1st Quarter 2012 1/01/2012 through 12/31/2015
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 6.99%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -3.55% 2nd Quarter 2015 1/01/2012 through 12/31/2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (3.55%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2015
1 Year rr_AverageAnnualReturnYear01 (4.09%)
Since Inception rr_AverageAnnualReturnSinceInception 5.00%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 14, 2011
(American Beacon SiM High Yield Opportunities Fund℠) | Investor Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (6.35%)
Since Inception rr_AverageAnnualReturnSinceInception 1.98%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 14, 2011
(American Beacon SiM High Yield Opportunities Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (2.25%)
Since Inception rr_AverageAnnualReturnSinceInception 2.67%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 14, 2011
(American Beacon The London Company Income Equity Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund's investment objective is current income, with a secondary objective of capital appreciation.
Expense [Heading] rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Narrative [Text Block] 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 33 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 45 of the statement of additional information ("SAI").
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in all classes of the American Beacon Funds on an aggregated basis.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text] rr_OperatingExpensesCaption

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

Expenses Deferred Charges [Text Block] 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.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] 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.
Expense Example [Heading] rr_ExpenseExampleHeading

Example
Expense Example Narrative [Text Block] 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:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption of shares:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 20% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 20.00%
Strategy [Heading] rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal circumstances, at least 80% of the Fund's net assets (plus the amount of any borrowings for investment purposes) are invested in 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.
Risk [Heading] rr_RiskHeading

Principal Risks

Risk Narrative [Text Block] 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 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.

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. It is not possible for the Fund 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. Cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.

Dividend Risk
An issuer of stock held by the Fund may choose not to declare a dividend or the dividend rate might not remain at current levels. Dividend paying stocks might not experience the same level of earnings growth or capital appreciation as non-dividend paying stocks.

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 are generally subject to the same risks of investing in the foreign securities that they evidence or into which they may be converted, 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. 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 net income and 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. 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 NAV and total return when compared to other diversified funds.

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 price volatility, (6) less government regulation and supervision of foreign stock exchanges, brokers and listed companies; and (7) delays in transaction settlement in some foreign markets.

Futures Contracts Risk
Futures contracts are derivative instruments where one party pays 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 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).

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 raised the federal funds rate in December 2016, marking only the second such interest rate hike in nearly a decade. The Federal Reserve has signaled additional increases in 2017. 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 duration. Fixed income securities or derivatives with longer duration 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 a 8% decrease in the value of the bond. An increase in interest rates can impact markets broadly as well. For example, 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, 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.

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.

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 an unusually high degree of volatility in the financial markets, both domestic and foreign. 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. 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 of a rate increase on various 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.

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, you will indirectly bear 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 funds. For example, money market funds are subject to interest rate risk, credit risk, and market risk.

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.

Securities Lending Risk
To the extent the Fund lends its securities, it may be subject to the following risks. Borrowers of the Fund's securities typically provide collateral in the form of cash that is reinvested in securities. The securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers. In addition, 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 there is the risk of possible loss of rights in the collateral should the borrower fail financially.

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 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 position or transaction, which 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 limited operating history, product lines, and financial resources, 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.
Risk Lose Money [Text] 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.
Risk Not Insured Depository Institution [Text] 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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The bar chart and table below provide an indication of risk by showing 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.

The chart and the table below show the performance of the Fund's Investor Class shares for all periods. The Fund began offering all shares classes on May 25, 2012. 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.
Bar Chart [Heading] rr_BarChartHeading

Calendar year total returns for Investor Class Shares. Year Ended 12/31
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarterly Return:
11.71% 1st Quarter 2013
1/1/2013 through 12/31/2015

Lowest Quarterly Return:
-6.38% 3rd Quarter 2015
1/1/2013 through 12/31/2015

The calendar year-to-date total return as of September 30, 2016 was 6.98%

Performance Table Heading rr_PerformanceTableHeading

Average annual total returns for periods ended December 31, 2015

Performance Table Closing [Text Block] 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 hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares; after-tax returns for other share classes will vary.
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred If you hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account or a 401(k) plan, the after-tax returns do not apply to your situation.
Performance Table Explanation after Tax Higher 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 Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide an indication of risk by showing 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.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Investor Class shares; after-tax returns for other share classes will vary.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.americanbeaconfunds.com
(American Beacon The London Company Income Equity Fund℠) | Russell 1000 Value Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (3.83%)
Since Inception rr_AverageAnnualReturnSinceInception 9.63%
(American Beacon The London Company Income Equity Fund℠) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) 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% [5]
Management Fees rr_ManagementFeesOverAssets 0.67% [9]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.21%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.14% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets none [10]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.14%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 685
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 916
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,167
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,881
1 Year rr_AverageAnnualReturnYear01 (1.11%)
Since Inception rr_AverageAnnualReturnSinceInception 12.77%
Inception Date of Class rr_AverageAnnualReturnInceptionDate May 29, 2012
(American Beacon The London Company Income Equity Fund℠) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management Fees rr_ManagementFeesOverAssets 0.67% [9]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.20%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.88% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets none [10]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.88%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 291
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 591
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,016
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,201
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 191
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 591
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,016
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,201
1 Year rr_AverageAnnualReturnYear01 (1.87%)
Since Inception rr_AverageAnnualReturnSinceInception 11.93%
Inception Date of Class rr_AverageAnnualReturnInceptionDate May 29, 2012
(American Beacon The London Company Income Equity Fund℠) | Class Y  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.67% [9]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.15%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.83% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets none [10]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 0.83%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 85
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 265
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 460
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,025
1 Year rr_AverageAnnualReturnYear01 (0.79%)
Since Inception rr_AverageAnnualReturnSinceInception 13.20%
Inception Date of Class rr_AverageAnnualReturnInceptionDate May 29, 2012
(American Beacon The London Company Income Equity Fund℠) | Institutional Class  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.67% [9]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.08%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.76% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.02%) [10]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 0.78%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 78
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 243
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 423
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 944
1 Year rr_AverageAnnualReturnYear01 (0.73%)
Since Inception rr_AverageAnnualReturnSinceInception 13.29%
Inception Date of Class rr_AverageAnnualReturnInceptionDate May 29, 2012
(American Beacon The London Company Income Equity Fund℠) | Investor Class  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.67% [9]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.39%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.07% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets none [10]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.07%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 109
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 340
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 589
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,304
Annual Return 2013 rr_AnnualReturn2013 26.62%
Annual Return 2014 rr_AnnualReturn2014 16.74%
Annual Return 2015 rr_AnnualReturn2015 (1.11%)
Year to Date Return, Label rr_YearToDateReturnLabel The calendar year-to-date total return as of September 30, 2016 was 6.98%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 6.98%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2016
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 11.71% 1st Quarter 2013 1/1/2013 through 12/31/2015
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 11.71%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2013
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -6.38% 3rd Quarter 2015 1/1/2013 through 12/31/2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (6.38%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2015
1 Year rr_AverageAnnualReturnYear01 (1.11%)
Since Inception rr_AverageAnnualReturnSinceInception 12.90%
Inception Date of Class rr_AverageAnnualReturnInceptionDate May 29, 2012
(American Beacon The London Company Income Equity Fund℠) | Investor Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.91%)
Since Inception rr_AverageAnnualReturnSinceInception 11.91%
Inception Date of Class rr_AverageAnnualReturnInceptionDate May 29, 2012
(American Beacon The London Company Income Equity Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (0.62%)
Since Inception rr_AverageAnnualReturnSinceInception 9.76%
Inception Date of Class rr_AverageAnnualReturnInceptionDate May 29, 2012
(American Beacon Zebra Small Cap Equity Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund's investment objective is long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading

Fees and Expenses of the Fund

Expense Narrative [Text Block] 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 33 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 45 of the statement of additional information ("SAI").
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in all classes of the American Beacon Funds on an aggregated basis.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text] rr_OperatingExpensesCaption

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

Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination December 31, 2017
Expenses Deferred Charges [Text Block] 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.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] 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.
Expense Example [Heading] rr_ExpenseExampleHeading

Example
Expense Example Narrative [Text Block] 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, 2017. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption of shares:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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 50% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 50.00%
Strategy [Heading] rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block] 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, 2016, the market capitalizations of the companies in the Russell 2000® Index ranged from $25 million to $6.58 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.
Risk [Heading] rr_RiskHeading

Principal Risks

Risk Narrative [Text Block] 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:

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. It is not possible for the Fund 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. Cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.

Dividend Risk
An issuer of stock held by the Fund may choose not to declare a dividend or the dividend rate might not remain at current levels. Dividend paying stocks might not experience the same level of earnings growth or capital appreciation as non-dividend paying stocks.

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 are generally subject to the same risks of investing in the foreign securities that they evidence or into which they may be converted, 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.

  • 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 net income and 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. 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.

Futures Contracts Risk
Futures contracts are derivative instruments where one party pays 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 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).

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, 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.

Liquidity Risk
The Fund is susceptible to the risk that certain small cap equity 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.

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 an unusually high degree of volatility in the financial markets, both domestic and foreign. 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. 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 of a rate increase on various 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.

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, you will indirectly bear 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 funds. For example, money market funds are subject to interest rate risk, credit risk, and market risk.

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.

Securities Lending Risk
To the extent the Fund lends its securities, it may be subject to the following risks. Borrowers of the Fund's securities typically provide collateral in the form of cash that is reinvested in securities. The securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers. In addition, 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 there is the risk of possible loss of rights in the collateral should the borrower fail financially.

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 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 position or transaction, which 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 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 limited operating history, product lines, and financial resources, 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.
Risk Lose Money [Text] 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.
Risk Not Insured Depository Institution [Text] 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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The bar chart and table below provide an indication of the risk of investing in the Fund by showing 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.

The chart and the table below show the performance of the Fund's Investor Class shares for all periods. The Fund began offering A Class shares, Y Class shares, Institutional Class shares and Investor Class shares on June 1, 2010; and C Class shares on September 1, 2010.

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.
Bar Chart [Heading] rr_BarChartHeading

Calendar year total returns for Investor Class Shares. Year Ended 12/31
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarterly Return:
15.69% 4th Quarter 2011
1/1/2011 through 12/31/2015

Lowest Quarterly Return:
-18.05% 3rd Quarter 2011
1/1/2011 through 12/31/2015

The calendar year-to-date total return as of September 30, 2016 was 11.37%

Performance Table Heading rr_PerformanceTableHeading

Average annual total returns for periods ended December 31, 2015

Performance Table Closing [Text Block] 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 hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares; after-tax returns for other share classes will vary.
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred If you hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account or a 401(k) plan, the after-tax returns do not apply to your situation.
Performance Table Explanation after Tax Higher 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 Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide an indication of the risk of investing in the Fund by showing 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.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Investor Class shares; after-tax returns for other share classes will vary.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.americanbeaconfunds.com
(American Beacon Zebra Small Cap Equity Fund℠) | Russell 2000 Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.41%)
5 Years rr_AverageAnnualReturnYear05 9.19%
Since Inception rr_AverageAnnualReturnSinceInception 12.30%
(American Beacon Zebra Small Cap Equity Fund℠) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) 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% [5]
Management Fees rr_ManagementFeesOverAssets 0.89% [11]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.76%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.91% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.61%) [12]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.30%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 700
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,085
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,494
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,634
1 Year rr_AverageAnnualReturnYear01 (4.07%)
5 Years rr_AverageAnnualReturnYear05 9.46%
Since Inception rr_AverageAnnualReturnSinceInception 12.25%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jun. 01, 2010
(American Beacon Zebra Small Cap Equity Fund℠) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management Fees rr_ManagementFeesOverAssets 0.89% [11]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.76%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.66% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.61%) [12]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 2.05%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 308
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 769
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,356
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,948
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 208
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 769
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,356
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,948
1 Year rr_AverageAnnualReturnYear01 (4.80%)
5 Years rr_AverageAnnualReturnYear05 8.63%
Since Inception rr_AverageAnnualReturnSinceInception 11.43%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Sep. 01, 2010
(American Beacon Zebra Small Cap Equity Fund℠) | Class Y  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.89% [11]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.69%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.59% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.59%) [12]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.00%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 102
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 444
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 810
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,840
1 Year rr_AverageAnnualReturnYear01 (3.77%)
5 Years rr_AverageAnnualReturnYear05 9.87%
Since Inception rr_AverageAnnualReturnSinceInception 12.66%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jun. 01, 2010
(American Beacon Zebra Small Cap Equity Fund℠) | Institutional Class  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.89% [11]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.64%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.54% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.64%) [12]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 0.90%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 92
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 424
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 780
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,781
1 Year rr_AverageAnnualReturnYear01 (3.67%)
5 Years rr_AverageAnnualReturnYear05 9.95%
Since Inception rr_AverageAnnualReturnSinceInception 12.77%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jun. 01, 2010
(American Beacon Zebra Small Cap Equity Fund℠) | Investor Class  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.89% [11]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.85%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.75% [7]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.47%) [12]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.28%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 130
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 504
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 904
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,022
Annual Return 2011 rr_AnnualReturn2011 (1.58%)
Annual Return 2012 rr_AnnualReturn2012 13.31%
Annual Return 2013 rr_AnnualReturn2013 41.96%
Annual Return 2014 rr_AnnualReturn2014 3.82%
Annual Return 2015 rr_AnnualReturn2015 (4.06%)
Year to Date Return, Label rr_YearToDateReturnLabel The calendar year-to-date total return as of September 30, 2016 was 11.37%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 11.37%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2016
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 15.69% 4th Quarter 2011 1/1/2011 through 12/31/2015
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 15.69%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2011
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -18.05% 3rd Quarter 2011 1/1/2011 through 12/31/2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (18.05%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
1 Year rr_AverageAnnualReturnYear01 (4.06%)
5 Years rr_AverageAnnualReturnYear05 9.54%
Since Inception rr_AverageAnnualReturnSinceInception 12.33%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jun. 01, 2010
(American Beacon Zebra Small Cap Equity Fund℠) | Investor Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (6.97%)
5 Years rr_AverageAnnualReturnYear05 7.46%
Since Inception rr_AverageAnnualReturnSinceInception 10.38%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jun. 01, 2010
(American Beacon Zebra Small Cap Equity Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (0.93%)
5 Years rr_AverageAnnualReturnYear05 7.26%
Since Inception rr_AverageAnnualReturnSinceInception 9.63%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jun. 01, 2010
(American Beacon Sound Point Floating Rate Income Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

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

Fees and Expenses of the Fund

Expense Narrative [Text Block] 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 15 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 28 of the statement of additional information ("SAI").
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in all classes of the American Beacon Funds on an aggregated basis.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text] rr_OperatingExpensesCaption

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

Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination December 31, 2017
Expenses Deferred Charges [Text Block] 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.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] 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.
Expense Example [Heading] rr_ExpenseExampleHeading

Example
Expense Example Narrative [Text Block] 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, 2017. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption of shares:
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

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. For the period from December 11, 2015 (commencement of operations) to August 31, 2016, the Fund's portfolio turnover rate was 168% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 168.00%
Strategy [Heading] rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block] 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, 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 with each reset period applicable to a designated portion of the loan. 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.

The Fund is non-diversified, which means that it is not limited to a percentage of assets that it may invest in any one issuer percentage.
Risk [Heading] rr_RiskHeading

Principal Risks

Risk Narrative [Text Block] 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:

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 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.

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. It is not possible for the Fund 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. Cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.

Floating Rate Securities Risk
The interest rates payable on floating rate securities are not fixed and may fluctuate based upon changes in market rates. The interest rate on a floating rate security is a variable rate which is tied to another interest rate, such as a money-market index or Treasury bill rate. Floating rate securities are subject to interest rate risk and credit risk.

As short-term interest rates decline, interest payable on floating rate securities typically decreases. Alternatively, during periods of rising interest rates, interest payable on floating-rate securities typically increases. 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 value of floating rate securities may decline if their interest rates do not rise as much, or as quickly, as interest rates in general. Conversely, floating rate securities will not generally increase in value if interest rates decline.

High Portfolio Turnover Risk
Portfolio turnover is a measure of the Fund's trading activity over a one-year period. A portfolio turnover rate of 100% would indicate that the Fund sold and replaced the entire value of its securities holdings during the period. High portfolio turnover could increase the Fund's transaction costs, have a negative impact on performance, and generate higher capital gain distributions to shareholders than if the Fund has a lower portfolio turnover rate.

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 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 as movements in interest rates. The Federal Reserve raised the federal funds rate in December 2016, marking only the second such interest rate hike in nearly a decade. The Federal Reserve has signaled additional increases in 2017. 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 duration 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.

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, 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.

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
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. There is a risk that the value of any collateral securing a loan in which the Fund has an interest may decline and that the collateral may not be sufficient to cover the amount owed on the loan. In the event the borrower defaults, the Fund's access to the collateral may be limited or delayed by bankruptcy or other insolvency laws. 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. 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.

Non-Diversification Risk
The Fund is non-diversified, which means the Fund may focus its investments in the securities of a comparatively small number of issuers. Investments in securities of a limited number of issuers exposes the Fund to greater market risk and potential losses than if assets were diversified among the securities of a greater number of issuers.

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, you will indirectly bear 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 funds. For example, to the extent the Fund invests in ETFs that invest in equity securities, fixed income securities and/or foreign securities, or track an index, the Fund is 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. Money market funds are subject to interest rate risk, credit risk, and market risk.

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.

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 heavy redemptions that could cause the Fund to sell assets at inopportune times or at a loss or depressed value. Redemption risk is heightened during periods of declining or illiquid markets. Heavy redemptions could hurt the Fund's performance.

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.

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.

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.

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 Banks ("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. Government securities and securities of government sponsored entities are subject to credit, 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.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk The Fund is non-diversified, which means the Fund may focus its investments in the securities of a comparatively small number of issuers. Investments in securities of a limited number of issuers exposes the Fund to greater market risk and potential losses than if assets were diversified among the securities of a greater number of issuers.
Risk Lose Money [Text] 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.
Risk Not Insured Depository Institution [Text] 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.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading

Fund Performance

Performance Narrative [Text Block] 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. The bar chart and table below shows the performance of the Fund's Institutional Class shares, which, prior to December 11, 2015, is the performance of the Institutional Class shares of the Fund's predecessor. The table below also shows the performance of the Fund's SP Class shares, which represents the performance of the predecessor Fund's Institutional Class shares from December 31, 2013 through May 30, 2014 and the performance of the predecessor Fund's Investor Class shares from May 31, 2014 through December 11, 2015. The predecessor Fund's Institutional Class shares would have had similar annual returns to its Investor Class shares because the shares are invested in the same portfolio securities. However, the Institutional Class shares had different expenses than the Investor Class shares. Performance information for A Class, C Class, Y Class and Investor Class shares of the Fund is not provided because these share classes have not been in operation for a full calendar year. 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.

The bar chart and table below provide an indication of the risk by showing 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.
Bar Chart [Heading] rr_BarChartHeading

Calendar year total returns for Institutional Class Shares. Year Ended 12/31
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

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

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

The calendar year-to-date total return as of September 30, 2016 was 5.72%

Performance Table Heading rr_PerformanceTableHeading

Average annual total returns for periods ended December 31, 2015

Performance Table Closing [Text Block] 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 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 for the Fund's Institutional Class shares: after-tax returns for other share classes will vary.
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local income taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred If you 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.
Performance Table Explanation after Tax Higher 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 Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide an indication of the risk by showing 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.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for the Fund's Institutional Class shares: after-tax returns for other share classes will vary.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.americanbeaconfunds.com
(American Beacon Sound Point Floating Rate Income Fund℠) | Credit Suisse Leveraged Loan Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (0.38%)
Since Inception rr_AverageAnnualReturnSinceInception 2.73%
(American Beacon Sound Point Floating Rate Income Fund℠) | Class A  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) 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% [13]
Management Fees rr_ManagementFeesOverAssets 0.70% [14]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.72%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.69% [15]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.43%) [16]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.26%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 375
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 728
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,105
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,163
(American Beacon Sound Point Floating Rate Income Fund℠) | Class C  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management Fees rr_ManagementFeesOverAssets 0.70% [14]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.85%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.57% [15]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.56%) [16]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 2.01%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 304
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 746
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,315
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,863
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 204
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 746
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,315
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,863
(American Beacon Sound Point Floating Rate Income Fund℠) | Class Y  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.70% [14]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.72%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.44% [15]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.48%) [16]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 0.96%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 98
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 408
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 741
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,683
(American Beacon Sound Point Floating Rate Income Fund℠) | Institutional Class  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.70% [14]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.56%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.28% [15]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.42%) [16]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 0.86%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 88
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 364
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 662
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,508
Annual Return 2013 rr_AnnualReturn2013 7.87%
Annual Return 2014 rr_AnnualReturn2014 4.21%
Annual Return 2015 rr_AnnualReturn2015 5.00%
Year to Date Return, Label rr_YearToDateReturnLabel The calendar year-to-date total return as of September 30, 2016 was 5.72%
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 5.72%
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2016
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 2.68% 1st Quarter 2015 1/1/2013 through 12/31/2015
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 2.68%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2015
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -0.18% 4th Quarter 2015 1/1/2013 through 12/31/2015
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (0.18%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2015
1 Year rr_AverageAnnualReturnYear01 5.00%
Since Inception rr_AverageAnnualReturnSinceInception 6.01%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Dec. 03, 2012
(American Beacon Sound Point Floating Rate Income Fund℠) | Institutional Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 2.77%
Since Inception rr_AverageAnnualReturnSinceInception 3.49%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Dec. 03, 2012
(American Beacon Sound Point Floating Rate Income Fund℠) | Institutional Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 2.83%
Since Inception rr_AverageAnnualReturnSinceInception 3.46%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Dec. 03, 2012
(American Beacon Sound Point Floating Rate Income Fund℠) | Investor Class  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.70% [14]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.61%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.33% [15]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.09%) [16]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.24%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 126
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 413
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 720
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,594
(American Beacon Sound Point Floating Rate Income Fund℠) | Class SP  
Prospectus: rr_ProspectusTable  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management Fees rr_ManagementFeesOverAssets 0.70% [14]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.54%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.02%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.51% [15]
Fee Waiver and/or expense reimbursement or recoupment rr_FeeWaiverOrReimbursementOverAssets (0.34%) [16]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement or recoupment rr_NetExpensesOverAssets 1.17%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 119
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 444
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 792
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,773
1 Year rr_AverageAnnualReturnYear01 4.53%
Since Inception rr_AverageAnnualReturnSinceInception 5.86%
Inception Date of Class rr_AverageAnnualReturnInceptionDate May 31, 2014
[1] 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.
[2] The portion of the management fee previously attributable to investment advisory services was 0.60% and the portion of the management fee previously attributable to administrative services was 0.30%.
[3] 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.
[4] American Beacon Advisors, Inc. (the "Manager") has contractually agreed to waive fees and/or reimburse expenses of the Fund's A Class, C Class, Y Class, Institutional Class and Investor Class shares, as applicable, through December 31, 2017 to the extent that Total Annual Fund Operating Expenses exceed 1.29% for the A Class, 2.04% for the C Class, 0.99% for the Y Class, 0.90% for the Institutional Class and 1.27% for the Investor Class (excluding taxes, interest, brokerage commissions, acquired fund fees and expenses, securities lending fees, expenses associated with securities sold short, litigation, and other extraordinary expenses). The contractual expense reimbursement can be changed only in the discretion and with the approval of a majority of the Fund's Board of Trustees. The Manager can be reimbursed by the Fund for any contractual fee waivers or expense reimbursements if reimbursement to the Manager (a) occurs within three years after the Manager's own waiver or reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the lesser of the contractual percentage limit in effect at the time of the waiver/reimbursement or the time of the recoupment.
[5] 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.
[6] The portion of the management fee previously attributable to investment advisory services was 0.45% and the portion of the management fee previously attributable to administrative services was 0.30%.
[7] 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.
[8] American Beacon Advisors, Inc. (the "Manager") has contractually agreed to waive fees and/or reimburse expenses of the Fund's Institutional Class through December 31, 2017 to the extent that Total Annual Fund Operating Expenses exceed 0.84% for the Institutional Class (excluding taxes, interest, brokerage commissions, acquired fund fees and expenses, securities lending fees, expenses associated with securities sold short, litigation, and other extraordinary expenses). The contractual expense reimbursement can be changed only in the discretion and with the approval of a majority of the Fund's Board of Trustees. The Manager can be reimbursed by the Fund for any contractual fee waivers or expense reimbursements if reimbursement to the Manager (a) occurs within three years after the Manager's own waiver or reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the lesser of the contractual percentage limit in effect at the time of the waiver/reimbursement or the time of the recoupment. During the fiscal year ended August 31, 2016, the Fund paid amounts to the Manager that were previously waived and/or reimbursed by the Manager under a contractual fee waiver/expense reimbursement for the Fund's A Class, C Class and Investor Class shares.
[9] The portion of the management fee previously attributable to investment advisory services was 0.37% and the portion of the management fee previously attributable to administrative services was 0.30%.
[10] During the fiscal year ended August 31, 2016, the Fund paid amounts to the Manager that were previously waived and/or reimbursed by the Manager under a contractual fee waiver/expense reimbursement agreement for the Fund's Institutional Class. Under that agreement, the Manager can be reimbursed by the Fund for any contractual fee waivers or expense reimbursements if reimbursement to the Manager (a) occurs within three years after the Manager's own waiver or reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the lesser of the contractual percentage limit in effect at the time of the waiver/reimbursement or the time of the recoupment.
[11] The portion of the management fee previously attributable to investment advisory services was 0.59% and the portion of the management fee previously attributable to administrative services was 0.30%.
[12] American Beacon Advisors, Inc. (the "Manager") has contractually agreed to waive fees and/or reimburse expenses of the Fund's A Class, C Class, Y Class, Institutional Class and Investor Class shares, as applicable, through December 31, 2017 to the extent that Total Annual Fund Operating Expenses exceed 1.29% for the A Class, 2.04% for the C Class, 0.99% for the Y Class, 0.89% for the Institutional Class and 1.27% for the Investor Class (excluding taxes, interest, brokerage commissions, acquired fund fees and expenses, securities lending fees, expenses associated with securities sold short, litigation, and other extraordinary expenses). The contractual expense reimbursement can be changed only in the discretion and with the approval of a majority of the Fund's Board of Trustees. The Manager can be reimbursed by the Fund for any contractual fee waivers or expense reimbursements if reimbursement to the Manager (a) occurs within three years after the Manager's own waiver or reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the lesser of the contractual percentage limit in effect at the time of the waiver/reimbursement or the time of the recoupment.
[13] 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.
[14] The portion of the management fee previously attributable to investment advisory services was 0.40% and the portion of the management fee previously attributable to administrative services was 0.30%.
[15] 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.
[16] American Beacon Advisors, Inc. (the "Manager") has contractually agreed to waive fees and/or reimburse expenses of the Fund's A Class, C Class, Y Class, Institutional Class, Investor Class and SP Class shares, as applicable, through December 31, 2017 to the extent that Total Annual Fund Operating Expenses exceed 1.24% for the A Class, 1.99% for the C Class, 0.94% for the Y Class, 0.84% for the Institutional Class, 1.22% for the Investor Class, and 1.15% for the SP Class (excluding taxes, interest, brokerage commissions, acquired fund fees and expenses, securities lending fees, expenses associated with securities sold short, litigation, and other extraordinary expenses). The contractual expense reimbursement can be changed only in the discretion and with the approval of a majority of the Fund's Board of Trustees. The Manager can be reimbursed by the Fund for any contractual fee waivers or expense reimbursements if reimbursement to the Manager (a) occurs within three years after the Manager's own waiver or reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the lesser of the contractual percentage limit in effect at the time of the waiver/reimbursement or the time of the recoupment.