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(American Beacon Grosvenor Long/Short 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 17 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 27 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
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 May 31, 2017
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Other expenses and Acquired Fund Fees and Expenses are based on estimated expenses for the current fiscal year.
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.
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 May 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 is not provided because the Fund has not commenced operations prior to the date of this Prospectus.

Strategy [Heading] rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund seeks to achieve long-term capital appreciation by allocating its assets to multiple subadvisors that employ investment strategies focused on taking long and short positions in global securities. The Fund seeks to achieve its objective with reduced volatility as compared to major market indices. The Fund employs a multi-manager management structure. The Manager has engaged Grosvenor Capital Management, L.P., an unaffiliated alternative investment advisory firm, to serve as the Fund's lead Sub-Advisor ("Lead Sub-Advisor"). The Lead Sub-Advisor allocates the Fund's assets among multiple sub-advisors ("Sub-Advisors") that employ non-traditional alternative investment strategies.

The Fund invests predominately in equity securities and equity-related instruments (such as derivatives) traded in U.S., foreign and emerging markets. The Fund's investments include: common stock, convertible securities, depositary receipts, exchange-traded funds ("ETFs"), currencies, and derivatives, such as options, futures, forwards, swaps, contracts for difference (an arrangement where the return is linked to the price movement of an underlying security or stock market index) and participatory notes (an unsecured and unsubordinated debt security designed to replicate exposure to an equity instrument). The Fund may use derivatives to generate profits, leverage the Fund's portfolio, hedge the Fund's exposure to a particular investment or market-related risk, as well as to manage the volatility of the Fund's return. The Fund may invest in the equity securities and equity-related instruments of companies of any market capitalization, but generally will invest in medium- and large-capitalization companies. The Fund expects to maintain short positions in equity securities and equity-related instruments. The Fund expects to have a net long bias, which means that the value of the Fund's long portfolio will exceed the value of the Fund's short portfolio, and the Fund will have directional exposure to the equity markets. However, the Sub-Advisors generally will vary the amount of this net exposure as market conditions and opportunities change. The Manager believes that the use of multiple Sub-Advisors provides the Fund with management diversification and will help to mitigate downside risk. In pursuing its investment strategies, the Fund may engage in active and frequent trading.

The Lead Sub-Advisor allocates the Fund's assets principally among Sub-Advisors that employ long/short investment strategies designed to take advantage of perceived investment opportunities or are based on their current market outlook. These strategies include the equity strategies and event driven strategies described below:

Strategies:

Equity Strategies: Equity strategies involve the purchase and/or short sale of equity and equity-linked instruments (e.g., ETFs, equity derivatives, depository receipts) in global markets. The Fund's Sub-Advisors primarily employ "hedged equity" investment strategies. A Sub-Advisor implements a hedged equity investment strategy by establishing long and short positions in equity or equity-linked instruments. Although the Fund's Sub-Advisors generally will establish both long and short positions, certain Sub-Advisors, may focus exclusively on establishing long or short positions, but not both. A Sub-Advisor may seek to hedge portfolio exposure by selling securities short or using instruments such as ETFs, equity-linked options, index options and futures. A Sub-Advisor also may seek to manage risk by adopting constraints on leverage, net market exposure, net regional exposure and net sector exposure, as well as position size limits, position stop-loss limits and parameters relating to the number of its positions.

A Sub-Advisor that pursues an equity strategy typically seeks to capitalize on discrepancies between the Sub-Advisor's evaluation of the intrinsic value of an equity security and its assessment of the issuer's prospects, on the one hand, and the market price of such security, on the other hand. Certain Sub-Advisors also may seek to extract value by being more catalyst- or trading-oriented.

A Sub-Advisor that employs an equity strategy may focus on a particular capitalization range (e.g., medium or large cap), a particular industry sector (e.g., healthcare, technology, or consumer) geographic region, or may employ a specific investment style (e.g., value vs. growth). A Sub-Advisor also may pursue a broad mandate, without specific regard for an issuer's capitalization, sector or geography. Some Sub-Advisors may employ equity strategies with an activist approach. Activist investing relies on a Sub-Advisor's ability to use a significant economic stake in a company's securities to influence management and corporate decisions to increase the value of the company's stock. Sub-Advisors may use a "bottom-up" analysis of individual issuers in making investment decisions and/or may utilize "top-down" macroeconomic analysis to guide capital-allocation strategies and fundamental security selection.

Event Driven Strategies: Sub-Advisors that employ event driven strategies invest in the securities of companies undergoing a corporate event, such as a publicly-announced merger or acquisition. They also may invest in securities issued by companies that have recently emerged from bankruptcy, restructured, recapitalized or are involved in litigation proceedings. .

The Sub-Advisors may engage in merger arbitrage transactions. Merger arbitrage seeks to capture the spread between a company's current stock price and its stock price upon the completion of a merger. I Merger arbitrage also can capitalize on perceived pricing discrepancies, or "spreads," in the equity securities of two companies involved in announced corporate transactions, such as mergers, tender or exchange offers. . For example, in a cash tender offer transaction, this strategy seeks to capture the spread between the tender price offered to shareholders and the price at which the target company's stock is trading.

Event driven strategies are implemented through long and short positions in equity securities that are expected to affect a security's price. Long positions are taken in securities expected to appreciate in value following the anticipated event. Short positions are taken in securities expected to depreciate in value following the anticipated event and/or as a hedge for long positions.

The Lead Sub-Advisor may allocate the Fund's assets to Sub-Advisors employing one or both of the strategies described above, and subject to the Manager's authority to determine otherwise, may change the allocations from time to time in its sole discretion without prior notice to shareholders. Each Sub-Advisor has discretion to invest its portion of the Fund's assets as it deems appropriate, based on its particular philosophy, style, strategies and views, in accordance with the Fund's investment guidelines. While each Sub-Advisor is subject to the oversight of the Manager and the Lead Sub-Advisor, neither the Manager nor Lead Sub-Advisor manages the day-to-day investment of the Fund's assets by the Sub-Advisors.

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 Lead Sub-Advisor will manage the Fund's portfolio primarily by allocating Fund assets to the Sub-Advisors. There can be no assurance that these allocations will enable the Fund to achieve its investment objectives. The Sub-Advisors' judgments about, and allocations between, asset classes and market exposures also may adversely affect the Fund's performance. This risk may be heightened by the use of derivatives to increase allocations to various market exposures.

Arbitrage Strategies Risk
The value of the securities and derivative instruments in which the Fund takes long and short positions to implement the Fund's arbitrage strategies may change in an adverse manner or in an unanticipated manner, in which case the Fund may realize losses. The expected gain on an individual arbitrage investment is normally considerably smaller than the possible loss should the transaction underlying the arbitrage investment be unexpectedly terminated. The expected timing of each transaction is also important since the length of time that the Fund's capital must be committed to any given transaction may affect the rate of return realized by the Fund, and unanticipated delays in completing the underlying transaction could cause the Fund to lose money or not achieve the desired rate of return.

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.

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 investments. Foreign currencies 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.

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. In addition, the Fund's investments in derivatives are subject to the following risks

  • Contracts for Difference. A contract for difference ("CFD") is a contract between two parties, typically described as "buyer" and "seller," stipulating that the seller will pay to the buyer the difference between the current value of an asset and its value in the future. (If the difference is negative, then the buyer instead pays the seller.) By entering into a CFD transaction, an Underlying Fund could incur losses because it would face many of the same types of risks as owning the underlying equity security directly. CFDs also are subject to counterparty risk and generally are illiquid.

  • Futures and Forward Contracts. Futures and forward contracts, including non-deliverable forwards ("NDFs") equity, equity index and foreign currency exchange 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 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 may not be a liquid secondary market for the futures contracts. 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 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.

  • Participatory Notes. Participatory notes involve risks that are in addition to the risks normally associated with a direct investment in the underlying equity securities. The Fund is subject to the risk that the issuer of the participatory note (i.e., the issuing bank or broker-dealer), which is the only responsible party under the note, may be unable or refuse to perform under the terms of the participatory note. While the holder of a participatory note is entitled to receive from the issuing bank or broker-dealer any dividends or other distributions paid on the underlying securities, the holder is not entitled to the same rights as an owner of the underlying securities, such as voting rights. Participatory notes are also not traded on exchanges, are privately issued, and may be illiquid.

  • 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 and as such are subject to leveraging risk. 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 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.

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; and delays and disruptions in securities settlement procedures.

Equity Investments Risk
Equity securities are subject to market risk. The Fund's investments in equity securities may include common stocks trading on U.S. and non-U.S. exchanges, securities convertible into or exchangeable for common stocks trading on U.S. and non-U.S. exchanges, depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges. Such investments may expose the Fund to additional risks. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company. Convertible securities are sensitive to movements in interest rates. In addition, convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities' investment value. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to, currency fluctuations and political and financial instability in the home country of a particular depositary receipt or foreign stock.

Event-Driven Strategies Risk
The Fund's use of event-driven and arbitrage strategies will cause the Fund to invest in the securities of companies undergoing a corporate or transaction (i.e., acquisitions, spin-offs, reorganizations and liquidations, tender offers and bankruptcies). A change in the terms or delay in the timing of these events, or the failure of these events to occur at all, may have a significant negative effect on the Fund's performance.

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 and greater volatility, (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.

Global Financial Markets Risk
Global economic and financial markets are becoming increasingly interconnected and conditions (including recent volatility and instability) and events (including natural disasters) in one country, region or financial market may adversely impact issuers in a different country, region or financial market. In addition, governmental and quasi-governmental organizations have taken a number of unprecedented actions designed to support the markets. Such events and conditions may adversely affect the value of the Fund's securities, result in greater market or liquidity risk or cause difficulty valuing the Fund's portfolio instruments or achieving the Fund's objective.

Growth Stocks Risk
Growth companies are expected to increase their earnings at a certain rate. When these expectations are not met, the prices of these stocks may decline, even if earnings showed an absolute increase. Growth company stocks also typically lack the dividend yield that can cushion stock price declines in market downturns.

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 and possibly have a negative impact on performance.

Interest Rate Risk
The Fund is subject to the risk that the market value of securities or derivatives that are influenced by interest rates will fluctuate due to changes in interest rates. As of the date of this Prospectus, interest rates are at or near historic lows, but may rise substantially and/or rapidly, potentially resulting in substantial losses to the Fund. 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. Convertible securities have fixed income characteristics and, therefore, can be adversely impacted by rising interest rates. Individual equities may be negatively or positively impacted by rising interest rates depending on the specific circumstances of an individual company's prospects. 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 and reduced demand for the issuer's goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets.

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 high growth rates during periods of economic expansion.

Leveraging Risk
The Fund's use of futures, forward contracts, swaps, other derivative instruments and selling securities short will have the economic effect of financial leverage. 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. Leveraging 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 may have limited marketability or be subject to restrictions on sale, and may be difficult to 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.

Market Direction Risk
Since the Fund will typically hold both long and short positions, an investment in the Fund will involve market risks associated with different types of investment decisions than those made for a typical "long only" fund. The Fund's results could suffer both when there is a general market advance and the Fund holds significant "short" positions, and when there is a general market decline and the Fund holds significant "long" positions.

Market Risk
Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the market, can affect the value of the Fund's shares. The Fund's investments are subject to stock market risk, which involves the possibility that the value of the Fund's investments in stocks will decline due to volatility or drops in any of the many individual country or global financial markets. Such events may cause the value of securities owned by the Fund to go up or down, sometimes rapidly or unpredictably, and may lead to increased redemptions, which could cause the Fund to experience a loss when selling securities to meet redemption requests by shareholders. Turbulence in financial markets and reduced liquidity in credit, fixed-income, or equity markets may negatively affect many issuers worldwide which could adversely affect the Fund.

Model Risk
The Sub-Advisors may use proprietary modeling systems to implement their investment strategies for the Fund. Investments selected using these models may perform differently than expected as a result of the factors used in the models, the weight placed on each factor, changes from the factors' historical trends and technical issues in the construction and implementation of the models. There is no assurance that the models are complete or accurate, or representative of future market cycles, nor will they necessarily be beneficial to the Fund if they are accurate. These systems may negatively affect Fund performance for various reasons, including human judgment, inaccuracy of historical data and non-quantitative factors (such as market or trading system dysfunctions, investor fear or over-reaction).

Multi-Manager Risk
The Fund's performance depends on, among other things, the Lead Sub-Advisor's success in monitoring and allocating the Fund's assets among the Sub-Advisors. The Sub-Advisors investment styles may not always be complementary. The Sub-Advisors make investment decisions independently of one another, and may make conflicting investment decisions. The Fund's multi-manager approach may result in the Fund investing a significant percentage of its assets in certain types of securities, which could be beneficial or detrimental to the Fund's performance depending on the performance of those securities and the overall market environment. The Sub-Advisors may underperform the market generally or underperform other investment managers that could have been selected for the Fund. The Lead Sub-Advisor and the Sub-Advisors also may use proprietary or licensed strategies that are based on considerations and factors that are not fully disclosed to the Board, the Manager or the Lead Sub-Advisor. The success of a particular Sub-Advisor in implementing its investment strategy is dependent on the expertise of its portfolio managers, and certain Sub-Advisors may have a limited number of investment management professionals. The loss of one or more of a Sub-Advisor's key investment professionals could have a materially adverse effect on the performance of the Fund. A Sub-Advisor may have little or no experience managing the assets of a registered investment company which, unlike the other accounts a Sub-Advisor may manage, is subject to daily inflows and outflows of investor cash and are subject to certain legal and tax-related restrictions on their investments and operations.

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. Investment 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 investments.

Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including exchange-traded funds ("ETFs") and 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 the underlying funds in addition to the Fund's direct fees and expenses and will be subject to the risks associated with investments in those funds. ETF shares may trade at a premium or discount to their net asset value. An ETF that tracks an index may not precisely replicate the returns of its benchmark index.

Sector Risk
To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may move up and down more than the broader market. The Fund may at times be substantially over-weighted in certain economic sectors and under-weighted in others. Accordingly, the Fund's performance could be disproportionately affected by the factors influencing those sectors.

Securities Selection Risk
Securities selected by the Sub-Advisors or the Lead Sub-Advisor 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 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.

Short Position Risk
The Fund will incur a loss as a result of a short position if the price of the instrument sold short increases in value between the date of the short sale and the date on which an offsetting position is purchased. Short positions may be considered speculative transactions and involve special risks, including greater reliance on the Sub-Advisor's ability to accurately anticipate the future value of a security or instrument. The Fund's losses are potentially unlimited in a short position transaction.

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.

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, such as certain derivatives, which may be illiquid or which may become illiquid.

Value Stocks Risk
Value stocks are subject to the risk that their intrinsic value may never be realized by the market or that their prices may decline. While the Fund's investments in value stocks may limit its downside risk over time, the Fund may produce more modest gains than riskier stock funds as a trade-off for this potentially lower risk. Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment.

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. Investment 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 investments.
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. 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.
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

Performance information for the Fund is not provided because the Fund had not commenced operations prior to the date of this Prospectus.

(American Beacon Grosvenor Long/Short 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% [1]
Management Fees rr_ManagementFeesOverAssets 1.55%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 2.84% [2]
Interest and Dividend Expense on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.46%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 4.65%
Fee Waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.68%) [3]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 2.97%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 254
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 1,211
(American Beacon Grosvenor Long/Short 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 1.55%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 2.84% [2]
Interest and Dividend Expense on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.46%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 5.40%
Fee Waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.68%) [3]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 3.72%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 429
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,423
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 329
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 $ 1,423
(American Beacon Grosvenor Long/Short 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 1.55%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 2.79% [2]
Interest and Dividend Expense on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.46%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 4.35%
Fee Waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.68%) [3]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 2.67%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 224
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 1,124
(American Beacon Grosvenor Long/Short 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 1.55%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 2.69% [2]
Interest and Dividend Expense on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.46%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 4.25%
Fee Waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.68%) [3]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 2.57%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 214
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 1,095
(American Beacon Grosvenor Long/Short 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 1.55%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 3.07% [2]
Interest and Dividend Expense on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.46%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 4.63%
Fee Waiver and/or expense reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.68%) [3]
Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement rr_NetExpensesOverAssets 2.95%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 252
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 1,205
[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] Other expenses and Acquired Fund Fees and Expenses are based on estimated expenses for the current fiscal year.
[3] 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 May 31, 2017 to the extent that Total Annual Fund Operating Expenses exceed 2.50% for the A Class, 3.25% for the C Class, 2.20% for the Y Class, 2.10% for the Institutional Class and 2.48% 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 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 contractual percentage limit in effect at the time of the waiver/reimbursement.