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(American Beacon Bahl & Gaynor Small Cap Growth Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund's investment objective is long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>
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 35 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 41 of the statement of additional information ("SAI"). With respect to purchases of shares through specific intermediaries, you may find additional information regarding sales charge discounts and waivers in Appendix A to the Fund's Prospectus entitled "Intermediary Sales Charge Discounts and Waivers". Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination April 30, 2020
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Example</b></div>
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 this Example reflects the fee waiver/expense reimbursement arrangement for each share class through April 30, 2020. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>
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 42% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 42.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>
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 securities of small capitalization companies. The Fund considers a company to be a small capitalization company if it has a market capitalization, at the time of investment, within the range of the market capitalizations of the companies in the Russell 2000® Index. The capitalization range of that index is subject to change over time due to market activity or changes in the composition of the index. As of December 31, 2018, the market capitalizations of the companies in the Russell 2000 Index ranged from $7.9 million to $6.3 billion.
The Fund's investment sub-advisor, Bahl & Gaynor Inc., d/b/a Bahl & Gaynor Investment Counsel ("Bahl & Gaynor") pursues its small cap growth strategy by focusing on high-quality dividend-paying stocks. Quantitative tools are initially used for screening purposes, but Bahl & Gaynor's investment process is primarily driven by fundamental, bottom-up, company-focused processes. The investment process begins by quantitatively screening the stock universe to identify companies with perceived competitive advantages by evaluating their historical revenue growth, earnings growth, long-term debt/capital, dividend history and cash flows. Bahl & Gaynor conducts extensive fundamental research on potential portfolio companies to determine which stock(s) provide the best risk/reward opportunities for inclusion in the portfolio. Bahl & Gaynor typically will sell an investment if the company's fundamentals have changed or the company's market capitalization (stock market worth) moves outside of the small cap range.
Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning, the Fund may have significant positions in particular sectors. However, as the sector composition of the Fund's portfolio changes over time, the Fund's exposure to a sector may be lower at a future date, and the Fund's exposure to other market sectors may be higher.
The Fund's equity investments may include common stocks, depositary receipts, and real estate investments trusts ("REITs").
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 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>
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, which are described in alphabetical order and not in order of importance or potential exposure, 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. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service providers, to suffer data corruption or lose operational functionality. It is not possible for the Fund or its service providers to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.
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 investment and market risk. The Fund's investments in equity securities may include common stocks, depositary receipts, 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.
  • Depositary Receipts. Depositary receipts are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to: currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.
  • REITs. Investments in REITs are subject to the risks associated with investing in the real estate industry such as adverse developments affecting the real estate industry and real property values. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. Domestic REITs could be adversely affected by failure to qualify for tax-free "pass-through" of distributed net income and net realized gains under the Internal Revenue Code 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.
Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.
Futures Contracts Risk
Futures contracts are derivative instruments where the parties agree to a fixed price for an agreed amount of securities or other underlying assets at an agreed date. The use of such derivative instruments may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities underlying those derivatives. Futures contracts may experience potentially dramatic price changes (losses) and imperfect correlation between the price of the contract and the underlying security or index, which will increase the volatility of the Fund and may involve a small investment of cash (the amount of initial and variation margin) relative to the magnitude of the risk assumed (the potential increase or decrease in the price of the futures contract).
Growth Companies 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 go down, even if earnings showed an absolute increase. Growth company stocks may lack the dividend yield that can cushion stock prices in market downturns.
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.
Market Risk
The Fund is subject to the risk that the securities markets will move down, sometimes rapidly and unpredictably based on overall economic conditions and other factors. The value of a security may decline due to general market conditions which are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investment sentiment generally. Changes in the financial condition of a single issuer can impact a market as a whole. A rise in protectionist trade policies, risks associated with the United Kingdom's vote to leave the European Union, the risk of a "trade war" between the United States and China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time.
Model and Data Risk
Models and data are used to screen potential investments for the Fund. When models or data prove to be incorrect or incomplete, any decisions made in reliance thereon expose the Fund to potential risks. Some of the models used by the sub-advisor are predictive in nature. The use of predictive models has inherent risks. Because predictive models are usually constructed based on historical data supplied by third parties, the success of relying on such models may depend heavily on the accuracy and reliability of the supplied historical data.
Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including money market funds. To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund's direct fees and expenses and will be subject to the risks associated with investments in those companies. For example, money market funds are subject to interest rate risk, credit risk, and market risk.
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: i) borrowers of the Fund's securities typically provide collateral in the form of cash that is reinvested in securities, ii) the securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers, iii) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund's ability to vote proxies or to settle transactions, and iv) there is the risk of possible loss of rights in the collateral should the borrower fail financially.
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.
Small Capitalization Companies Risk
Investing in the securities of small capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies. Since smaller companies may have narrower commercial markets, and more limited operating history, product lines, and managerial and financial resources than larger, more established companies, the securities of these companies may lack sufficient market liquidity and they can be particularly sensitive to expected changes in interest rates, borrowing costs and earnings.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>
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. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns for Investor Class Shares. Year Ended 12/31</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarterly Return:
8.86% 4th Quarter 2016
1/1/2015 through 12/31/2018
Lowest Quarterly Return:
-18.89% 4th Quarter 2018
1/1/2015 through 12/31/2018
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Average annual total returns for periods ended December 31, 2018</b></div>
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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares; 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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation.
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 Bahl & Gaynor Small Cap Growth Fund℠) | Russell 2000 Growth Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (9.31%)
Since Inception rr_AverageAnnualReturnSinceInception 6.19%
(American Beacon Bahl & Gaynor Small Cap Growth 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 0.88%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.48%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.61%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.23%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.38%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 707
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,033
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,380
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,358
1 Year rr_AverageAnnualReturnYear01 (16.78%)
Since Inception rr_AverageAnnualReturnSinceInception 4.62%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 15, 2014
(American Beacon Bahl & Gaynor Small Cap Growth 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 0.88%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.47%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.35%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.22%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.13%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 316
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 712
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,235
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,669
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 216
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 712
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,235
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,669
1 Year rr_AverageAnnualReturnYear01 (13.26%)
Since Inception rr_AverageAnnualReturnSinceInception 5.23%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 15, 2014
(American Beacon Bahl & Gaynor Small Cap Growth 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 0.88%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.46%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.34%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.26%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.08%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 110
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 399
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 709
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,590
1 Year rr_AverageAnnualReturnYear01 (11.37%)
Since Inception rr_AverageAnnualReturnSinceInception 6.35%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 15, 2014
(American Beacon Bahl & Gaynor Small Cap Growth 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 0.88%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.38%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.26%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.28%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.98%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 100
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 372
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 665
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,498
1 Year rr_AverageAnnualReturnYear01 (11.27%)
Since Inception rr_AverageAnnualReturnSinceInception 6.44%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 15, 2014
(American Beacon Bahl & Gaynor Small Cap Growth 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 0.88%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.65%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.53%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.17%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.36%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 138
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 467
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 818
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,809
Annual Return 2015 rr_AnnualReturn2015 (3.25%)
Annual Return 2016 rr_AnnualReturn2016 25.31%
Annual Return 2017 rr_AnnualReturn2017 13.23%
Annual Return 2018 rr_AnnualReturn2018 (11.64%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 8.86% 4th Quarter 2016 1/1/2015 through 12/31/2018
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 8.86%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2016
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -18.89% 4th Quarter 2018 1/1/2015 through 12/31/2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (18.89%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (11.64%)
Since Inception rr_AverageAnnualReturnSinceInception 6.04%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 15, 2014
(American Beacon Bahl & Gaynor Small Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (12.92%)
Since Inception rr_AverageAnnualReturnSinceInception 5.32%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 15, 2014
(American Beacon Bahl & Gaynor Small Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (6.01%)
Since Inception rr_AverageAnnualReturnSinceInception 4.70%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jul. 15, 2014
(American Beacon Bridgeway Large Cap Growth Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund seeks long-term total return on capital, primarily through capital appreciation.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>
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 35 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 41 of the statement of additional information ("SAI"). With respect to purchases of shares through specific intermediaries, you may find additional information regarding sales charge discounts and waivers in Appendix A to the Fund's Prospectus entitled "Intermediary Sales Charge Discounts and Waivers". Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination April 30, 2020
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Example</b></div>
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 this Example reflects the fee waiver/expense reimbursement arrangement for the Fund's A Class, Y Class, R6 Class, Institutional Class and Investor Class shares through April 30, 2020. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>
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 60% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 60.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests in a diversified portfolio of large capitalization companies that are listed on the New York Stock Exchange, NYSE American, or Nasdaq. Under normal circumstances, the Fund invests at least 80% of its net assets (plus borrowings for investment purposes) in stocks from among those in the large-cap growth category at the time of purchase. For purposes of the Fund's investments, "large-cap stocks" are stocks of companies whose market capitalization falls within the range of the Russell 1000® Index at the time of investment. The Russell 1000 Index is an unmanaged, market value weighted index, which measures performance of approximately 1,000 of the largest companies in the U.S. equity market. The Russell 1000 Index is reconstituted from time to time. The market capitalization range for the Russell 1000 Index was $472.5 million to $780.4 billion as of December 31, 2018.
Growth stocks are those that the Fund's sub-advisor, Bridgeway Capital Management, Inc. ("Bridgeway Capital") believes have above average prospects for economic growth. Generally, these are stocks represented in the Russell 1000® Growth Index, but may also include stocks of other companies with similar "growth" characteristics whose market capitalizations are within the range of the Russell 1000 Index. The Russell 1000 Growth Index includes those Russell 1000 companies with higher price-to-book ratios and higher forecasted growth values.
The Fund's investments may include common stocks, preferred stocks, securities convertible into U.S. common stocks, real estate investment trusts ("REITs"), depositary receipts and dollar-denominated foreign stocks traded on U.S. exchanges (collectively referred to as "stocks"). The Fund also may invest in stocks of mid-capitalization companies.
Bridgeway Capital selects stocks within the large-cap growth category using a statistically driven approach. Bridgeway Capital will not necessarily sell a stock if it "migrates" outside the market capitalization range of the Russell 1000 Index after purchase. As a result, due to such "migration" or other market movements, the Fund may have less than 80% of its assets in large-cap stocks at any point in time. Based on statistically driven rules, securities are sold when the reasons for selecting the stock are no longer valid or when necessary to maintain the risk profile of the overall Fund.
Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning to reflect its benchmark index, the Fund may have significant positions in particular sectors, including the Information Technology sector. However, as the sector composition of the Fund's portfolio changes over time, the Fund's exposure to the Information Technology sector may be lower at a future date, and the Fund's exposure to other market sectors may be higher.
While the Fund is actively managed for long-term total return, Bridgeway Capital seeks to minimize capital gain distributions as part of a tax management strategy. The successful application of this method is intended to result in a more tax-efficient fund than would otherwise be the case.
The Fund may also 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>
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, which are described in alphabetical order and not in order of importance or potential exposure, are:
Allocation Risk
The Manager's and the sub-advisor's judgments about, and allocations among, asset classes and market exposures may adversely 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. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service providers, to suffer data corruption or lose operational functionality. It is not possible for the Fund or its service providers to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.
Equity Investments Risk
Equity securities are subject to investment and market 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 U.S. dollar-denominated foreign stocks traded on U.S. exchanges. Such investments may expose the Fund to additional risks.
  • Common Stock. The value of a company's common stock may fall as a result of factors affecting the company, companies in the same industry or sector, or the financial markets overall. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company.
  • Convertible Securities. Convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities' investment value. Convertible securities are also sensitive to movements in interest rates.
  • Depositary Receipts. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to: currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.
  • Preferred Stock. Preferred stocks are sensitive to movements in interest rates. Preferred stocks may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders.
  • REITs. Investments in REITs are subject to the risks associated with investing in the real estate industry such as adverse developments affecting the real estate industry and real property values. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. Domestic REITs could be adversely affected by failure to qualify for tax-free "pass-through" of distributed net income and net realized gains under the Internal Revenue Code of 1986, as amended ("Internal Revenue Code"), or to maintain their exemption from registration under the Investment Company Act of 1940, as amended ("Investment Company Act"). REITs typically incur fees that are separate from those incurred by the Fund. Accordingly, the Fund's investment in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs' operating expenses, in addition to paying Fund expenses. The value of REIT common stock may decline when interest rates rise.
Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.
Futures Contracts Risk
Futures contracts are derivative instruments where the parties agree to a fixed price for an agreed amount of securities or other underlying assets at an agreed date. The use of such derivative instruments may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities underlying those derivatives. Futures contracts may experience potentially dramatic price changes (losses) and imperfect correlation between the price of the contract and the underlying security or index, which will increase the volatility of the Fund and may involve a small investment of cash (the amount of initial and variation margin) relative to the magnitude of the risk assumed (the potential increase or decrease in the price of the futures contract).
Growth Companies 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 go down, even if earnings showed an absolute increase. Growth company stocks may lack the dividend yield that can cushion stock prices in market downturns.
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 the high growth rates of successful smaller companies, especially during periods of economic expansion.
Market Risk
The Fund is subject to the risk that the securities markets will move down, sometimes rapidly and unpredictably based on overall economic conditions and other factors. The value of a security may decline due to general market conditions which are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investment sentiment generally. Changes in the financial condition of a single issuer can impact a market as a whole. A rise in protectionist trade policies, risks associated with the United Kingdom's vote to leave the European Union, the risk of a "trade war" between the United States and China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time.
Mid-Capitalization Companies Risk
Investing in the securities of mid-capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies. Since mid-capitalization companies may have narrower commercial markets and more limited operating history, product lines, and managerial and financial resources than larger, more established companies, the securities of these companies may lack sufficient market liquidity, and they can be particularly sensitive to expected changes in interest rates, borrowing costs and earnings.
Model and Data Risk
Models and data are used to screen potential investments for the Fund. When models or data prove to be incorrect or incomplete, any decisions made in reliance thereon expose the Fund to potential risks. Some of the models used by the sub-advisor are predictive in nature. The use of predictive models has inherent risks. Because predictive models are usually constructed based on historical data supplied by third parties, the success of relying on such models may depend heavily on the accuracy and reliability of the supplied historical data.
Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including money market funds. To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund's direct fees and expenses and will be subject to the risks associated with investments in those companies. For example, money market funds are subject to interest rate risk, credit risk, and market risk.
Redemption Risk
The Fund may experience periods of high levels of redemptions that could cause the Fund to sell assets at inopportune times or at a loss or depressed value. The sale of assets to meet redemption requests may create net capital gains, which could cause the Fund to have to distribute substantial capital gains. Redemption risk is heightened during periods of declining or illiquid markets. Heavy redemptions could hurt the Fund's performance.
Risk of Programming and Modeling Error
The success of the sub-advisor's investment strategy depends largely on the effectiveness of its quantitative research models and investment programs. The programs may not react as expected to market events resulting in losses for the Fund. Additionally, programs may become outdated or experience malfunctions which may not be identified by the sub-advisor and therefore may also result in losses to the Fund.
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.
  • Information Technology Sector Risk. The market prices of information technology-related securities tend to exhibit a greater degree of market risk and sharp price fluctuations than other types of securities. These securities may fall in and out of favor with investors rapidly, which may cause sudden selling and dramatically lower market prices.
Securities Lending Risk
To the extent the Fund lends its securities, it may be subject to the following risks: i) borrowers of the Fund's securities typically provide collateral in the form of cash that is reinvested in securities, ii) the securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers, iii) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund's ability to vote proxies or to settle transactions, and iv) there is the risk of possible loss of rights in the collateral should the borrower fail financially.
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.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
On February 5, 2016, the Fund acquired all the assets and assumed all the liabilities of the Fund's predecessor. The Institutional Class shares of the Fund have adopted the performance history and financial statements of the Fund's predecessor. The chart and the table below show the performance of the Fund's Institutional Class shares, which, prior to February 5, 2016, is the performance of the Fund's predecessor. The table below also shows the performance of the Fund's A Class, C Class, Y Class, Investor Class, and R6 Class shares. Performance for the A Class, C Class, Y Class, and Investor Class shares represents the returns achieved by the Fund's predecessor from January 1, 2009 through February 4, 2016, and the performance of each of the Fund's respective share classes from February 5, 2016 through December 31, 2018. Performance for the R6 Class shares represents the returns achieved by the Fund's predecessor from January 1, 2009 through February 4, 2016, the performance of the Fund's Institutional Class from February 5, 2016 through April 29, 2018, and the Fund's R6 Class from April 30, 2018 through December 31, 2018. In each case, the newer share classes would have had similar annual returns to the Fund's predecessor because the shares of each class represent investments in the same portfolio securities. However, the older share class had different expenses than the newer share classes, which would affect performance. 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 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 and was the benchmark index of the Fund's predecessor.
Bar Chart [Heading] rr_BarChartHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Calendar year total returns for Institutional Class Shares. Year Ended 12/31 </b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarterly Return:
13.96% 2nd Quarter 2009
1/1/2009 through 12/31/2018
Lowest Quarterly Return:
-18.37% 4th Quarter 2018
1/1/2009 through 12/31/2018
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Average annual total returns for periods ended December 31, 2018</b></div>
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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for the Fund's Institutional Class shares; after-tax returns for other share classes will vary.
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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation.
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 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 only 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 Bridgeway Large Cap Growth Fund℠) | Russell 1000 Growth Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.51%)
5 Years rr_AverageAnnualReturnYear05 10.40%
10 Years rr_AverageAnnualReturnYear10 15.29%
(American Beacon Bridgeway Large Cap Growth 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 0.73%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.27%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.25%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.04%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.21%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 691
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 945
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,218
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,996
1 Year rr_AverageAnnualReturnYear01 (11.87%)
5 Years rr_AverageAnnualReturnYear05 7.69%
10 Years rr_AverageAnnualReturnYear10 13.52%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 05, 2016
(American Beacon Bridgeway Large Cap Growth 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 0.73%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.22%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.95%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.96%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 298
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 612
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,052
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,275
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 198
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 612
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,052
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,275
1 Year rr_AverageAnnualReturnYear01 (8.74%)
5 Years rr_AverageAnnualReturnYear05 8.49%
10 Years rr_AverageAnnualReturnYear10 13.93%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 05, 2016
(American Beacon Bridgeway Large Cap Growth 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 0.73%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.24%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.97%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.06%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.91%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 93
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 303
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 530
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,184
1 Year rr_AverageAnnualReturnYear01 (6.85%)
5 Years rr_AverageAnnualReturnYear05 9.14%
10 Years rr_AverageAnnualReturnYear10 14.27%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 05, 2016
(American Beacon Bridgeway Large Cap Growth Fund℠) | Class R6  
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 0.73%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 3.42%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 4.15%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (3.39%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.76%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 78
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 950
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,838
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 4,123
1 Year rr_AverageAnnualReturnYear01 (6.00%)
5 Years rr_AverageAnnualReturnYear05 9.20%
10 Years rr_AverageAnnualReturnYear10 14.30%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Apr. 30, 2018
(American Beacon Bridgeway Large Cap Growth 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 0.73%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.20%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.93%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.12%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.81%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 83
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 284
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 503
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,132
Annual Return 2009 rr_AnnualReturn2009 36.66%
Annual Return 2010 rr_AnnualReturn2010 13.34%
Annual Return 2011 rr_AnnualReturn2011 (0.72%)
Annual Return 2012 rr_AnnualReturn2012 16.21%
Annual Return 2013 rr_AnnualReturn2013 37.19%
Annual Return 2014 rr_AnnualReturn2014 18.66%
Annual Return 2015 rr_AnnualReturn2015 3.62%
Annual Return 2016 rr_AnnualReturn2016 5.60%
Annual Return 2017 rr_AnnualReturn2017 27.21%
Annual Return 2018 rr_AnnualReturn2018 (5.99%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 13.96% 2nd Quarter 2009 1/1/2009 through 12/31/2018
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 13.96%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -18.37% 4th Quarter 2018 1/1/2009 through 12/31/2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (18.37%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (5.99%)
5 Years rr_AverageAnnualReturnYear05 9.20%
10 Years rr_AverageAnnualReturnYear10 14.30%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Oct. 31, 2003
(American Beacon Bridgeway Large Cap Growth Fund℠) | Institutional Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (8.65%)
5 Years rr_AverageAnnualReturnYear05 8.25%
10 Years rr_AverageAnnualReturnYear10 13.74%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Oct. 31, 2003
(American Beacon Bridgeway Large Cap Growth Fund℠) | Institutional Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (2.43%)
5 Years rr_AverageAnnualReturnYear05 7.13%
10 Years rr_AverageAnnualReturnYear10 12.01%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Oct. 31, 2003
(American Beacon Bridgeway Large Cap Growth 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 0.73%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.47%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.20%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.01%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.19%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 121
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 380
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 659
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,454
1 Year rr_AverageAnnualReturnYear01 (6.33%)
5 Years rr_AverageAnnualReturnYear05 8.96%
10 Years rr_AverageAnnualReturnYear10 14.18%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 05, 2016
(American Beacon Bridgeway Large Cap Value Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund seeks to provide long-term total return on capital, primarily through capital appreciation and some income.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>
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 35 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 41 of the statement of additional information ("SAI"). With respect to purchases of shares through specific intermediaries, you may find additional information regarding sales charge discounts and waivers in Appendix A to the Fund's Prospectus entitled "Intermediary Sales Charge Discounts and Waivers". Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></div>
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Example</b></div>
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>
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 49% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 49.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests in a diversified portfolio of stocks of large capitalization companies that are listed on the New York Stock Exchange, NYSE American, or Nasdaq. Under normal market conditions, at least 80% of Fund net assets (plus borrowings for investment purposes) are invested in stocks from among those in the large-cap value category at the time of purchase. For purposes of the Fund's investment portfolio, "large-cap stocks" are those whose market capitalization (stock market worth) falls within the range of the Russell 1000® Index at the time of investment. The Russell 1000® Index measures the performance of the 1,000 largest U.S. companies based on total market capitalization. As of December 31, 2018, the market capitalizations of the companies in the Russell 1000® Index ranged from $472.5 million to $780.4 billion.
The Fund's sub-advisor, Bridgeway Capital Management, Inc. ("Bridgeway Capital"), selects stocks within the large-cap value category for the Fund using a proprietary statistically driven approach. Value stocks are those Bridgeway Capital believes are priced cheaply relative to some financial measures of worth, such as the ratio of price to earnings, price to sales, or price to cash flow. Generally, these are stocks represented in the Russell 1000® Value Index, plus large capitalization stocks with similar "value" characteristics. The Russell 1000® Value Index includes those Russell 1000® companies with lower price-to-book ratios and lower forecasted growth values. Based on statistically driven rules, securities are sold when the reasons for selecting the stock are no longer valid or when necessary to maintain the risk profile of the overall Fund.
The Fund's investments may include common stocks, preferred stocks, securities convertible into U.S. common stocks, real estate investment trusts ("REITs"), American Depositary Receipts ("ADRs") and U.S. dollar-denominated foreign stocks traded on U.S. exchanges (collectively referred to as "stocks"). The Fund also may invest in stocks of mid-capitalization companies.
The Fund may also 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.
Bridgeway Capital selects stocks within the large-cap growth category using a statistically driven approach. Bridgeway Capital will not necessarily sell a stock if it "migrates" outside the market capitalization range of the Russell 1000 Index after purchase. As a result, due to such "migration" or other market movements, the Fund may have less than 80% of its assets in large-cap stocks at any point in time.
While the Fund is actively managed for long-term total return, Bridgeway Capital seeks to minimize capital gains distributions as part of a tax management strategy. The successful application of this method is intended to result in a more tax-efficient fund than would otherwise be the case.
Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning to reflect its benchmark index, the Fund may have significant positions in particular sectors, including the Financial Services sector. However, as the sector composition of the Fund's portfolio changes over time, the Fund's exposure to the Financial Services sector may be lower at a future date, and the Fund's exposure to other market sectors may be higher.
The Fund uses income to pursue its investment objective. Income is achieved almost exclusively from dividend-paying stocks held by the Fund. However, not all stocks held by the Fund pay dividends.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>
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, which are described in alphabetical order and not in order of importance or potential exposure, are:
Allocation Risk
The Manager's and the sub-advisor's judgments about, and allocations among, asset classes and market exposures may adversely 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. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service providers, to suffer data corruption or lose operational functionality. It is not possible for the Fund or its service providers to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.
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 investment and market 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 U.S. dollar-denominated foreign stocks traded on U.S. exchanges. Such investments may expose the Fund to additional risks.
  • Common Stock. The value of a company's common stock may fall as a result of factors affecting the company, companies in the same industry or sector, or the financial markets overall. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company.
  • Convertible Securities. Convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities' investment value. Convertible securities are also sensitive to movements in interest rates.
  • Depositary Receipts. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to: currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.
  • Preferred Stock. Preferred stocks are sensitive to movements in interest rates. Preferred stocks may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders.
  • REITs. Investments in REITs are subject to the risks associated with investing in the real estate industry such as adverse developments affecting the real estate industry and real property values. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. Domestic REITs could be adversely affected by failure to qualify for tax-free "pass-through" of distributed net income and net realized gains under the Internal Revenue Code of 1986, as amended ("Internal Revenue Code"), or to maintain their exemption from registration under the Investment Company Act of 1940, as amended ("Investment Company Act"). REITs typically incur fees that are separate from those incurred by the Fund. Accordingly, the Fund's investment in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs' operating expenses, in addition to paying Fund expenses. The value of REIT common stock may decline when interest rates rise.
Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.
Futures Contracts Risk
Futures contracts are derivative instruments where the parties agree to a fixed price for an agreed amount of securities or other underlying assets at an agreed date. The use of such derivative instruments may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities underlying those derivatives. Futures contracts may experience potentially dramatic price changes (losses) and imperfect correlation between the price of the contract and the underlying security or index, which will increase the volatility of the Fund and may involve a small investment of cash (the amount of initial and variation margin) relative to the magnitude of the risk assumed (the potential increase or decrease in the price of the futures contract).
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 the high growth rates of successful smaller companies, especially during periods of economic expansion.
Market Risk
The Fund is subject to the risk that the securities markets will move down, sometimes rapidly and unpredictably based on overall economic conditions and other factors. The value of a security may decline due to general market conditions which are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investment sentiment generally. Changes in the financial condition of a single issuer can impact a market as a whole. A rise in protectionist trade policies, risks associated with the United Kingdom's vote to leave the European Union, the risk of a "trade war" between the United States and China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time.
Mid-Capitalization Companies Risk
Investing in the securities of mid-capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies. Since mid-capitalization companies may have narrower commercial markets and more limited operating history, product lines, and managerial and financial resources than larger, more established companies, the securities of these companies may lack sufficient market liquidity, and they can be particularly sensitive to expected changes in interest rates, borrowing costs and earnings.
Model and Data Risk
Models and data are used to screen potential investments for the Fund. When models or data prove to be incorrect or incomplete, any decisions made in reliance thereon expose the Fund to potential risks. Some of the models used by the sub-advisor are predictive in nature. The use of predictive models has inherent risks. Because predictive models are usually constructed based on historical data supplied by third parties, the success of relying on such models may depend heavily on the accuracy and reliability of the supplied historical data.
Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including money market funds. To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund's direct fees and expenses and will be subject to the risks associated with investments in those companies. For example, money market funds are subject to interest rate risk, credit risk, and market risk.
Redemption Risk
The Fund may experience periods of high levels of redemptions that could cause the Fund to sell assets at inopportune times or at a loss or depressed value. The sale of assets to meet redemption requests may create net capital gains, which could cause the Fund to have to distribute substantial capital gains. Redemption risk is heightened during periods of declining or illiquid markets. Heavy redemptions could hurt the Fund's performance.
Risk of Programming and Modeling Error
The success of the sub-advisor's investment strategy depends largely on the effectiveness of its quantitative research models and investment programs. The programs may not react as expected to market events resulting in losses for the Fund. Additionally, programs may become outdated or experience malfunctions which may not be identified by the sub-advisor and therefore may also result in losses to the Fund.
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.
  • Financial Services Sector Risk. To the extent the Fund invests in the financial services sector, the value of the Fund's shares may be particularly vulnerable to factors affecting that sector, such as the availability and cost of capital funds, changes in interest rates, the rate of corporate and consumer debt defaults, extensive government regulation and price competition.
Securities Lending Risk
To the extent the Fund lends its securities, it may be subject to the following risks: i) borrowers of the Fund's securities typically provide collateral in the form of cash that is reinvested in securities, ii) the securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers, iii) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund's ability to vote proxies or to settle transactions, and iv) there is the risk of possible loss of rights in the collateral should the borrower fail financially.
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.
Value Stocks Risk
Value stocks are subject to the risk that their intrinsic value may never be realized by the market or that their prices may decline. The Fund's investments in value stocks seek to limit potential downside price risk over time; however, value stock prices still may decline substantially. In addition, the Fund may produce more modest gains as a trade-off for this potentially lower risk. The Fund's investment in value stocks could cause the Fund to underperform funds that use a growth or non-value approach to investing or have a broader investment style.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>
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 performance of the Fund's Investor Class shares shown in the chart and table below represent the returns achieved by the Class N shares of the Fund's predecessor from January 1, 2009 through February 2, 2012, and the performance of the Investor Class shares from February 3, 2012 through December 31, 2018. The table below also shows the performance of the Fund's A Class, C Class, Y Class, Institutional Class and R6 Class shares. The Institutional Class shares of the Fund have adopted the performance history and financial statements of the Class N shares of the Fund's predecessor. Performance for the A Class, C Class, Y Class, and Institutional Class shares represents the returns achieved by the Class N shares of the Fund's predecessor from January 1, 2009 through February 2, 2012, and the performance of each of the Fund's respective share classes from February 3, 2012 through December 31, 2018. Performance for the R6 Class shares represents the returns achieved by the Class N shares of the Fund's predecessor from January 1, 2009 through February 2, 2012, the Fund's Investor Class from February 3, 2012 through April 27, 2017, and the Fund's R6 Class from April 28, 2017 through December 31, 2018. In each case, the newer share classes would have had similar annual returns to the Class N shares because the shares of each class represent investments in the same portfolio securities. However, the Class N shares had different expenses than the newer share classes, which would affect performance. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Calendar year total returns for Investor Class Shares. Year Ended 12/31</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarterly Return:
17.15% 3rd Quarter 2009
1/1/2009 through 12/31/2018
Lowest Quarterly Return:
-16.16% 4th Quarter 2018
1/1/2009 through 12/31/2018
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Average annual total returns for periods ended December 31, 2018</b></div>
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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares; 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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation.
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 Bridgeway Large Cap Value Fund℠) | Russell 1000 Value Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (8.27%)
5 Years rr_AverageAnnualReturnYear05 5.95%
10 Years rr_AverageAnnualReturnYear10 11.18%
(American Beacon Bridgeway Large Cap Value 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 0.65%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.17%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.07%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 678
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 896
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,131
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,806
1 Year rr_AverageAnnualReturnYear01 (18.54%)
5 Years rr_AverageAnnualReturnYear05 4.05%
10 Years rr_AverageAnnualReturnYear10 11.13%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 03, 2012
(American Beacon Bridgeway Large Cap Value 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 0.65%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.14%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.79%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 282
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 563
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 970
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,105
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 182
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 563
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 970
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,105
1 Year rr_AverageAnnualReturnYear01 (15.20%)
5 Years rr_AverageAnnualReturnYear05 4.50%
10 Years rr_AverageAnnualReturnYear10 11.24%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 03, 2012
(American Beacon Bridgeway Large Cap Value 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 0.65%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.14%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.79%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 81
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 252
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 439
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 978
1 Year rr_AverageAnnualReturnYear01 (13.35%)
5 Years rr_AverageAnnualReturnYear05 5.61%
10 Years rr_AverageAnnualReturnYear10 12.06%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 03, 2012
(American Beacon Bridgeway Large Cap Value Fund℠) | Class R6  
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 0.65%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.05%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.70%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 72
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 224
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 390
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 871
1 Year rr_AverageAnnualReturnYear01 (13.27%)
5 Years rr_AverageAnnualReturnYear05 5.66%
10 Years rr_AverageAnnualReturnYear10 12.10%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Apr. 28, 2017
(American Beacon Bridgeway Large Cap Value 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 0.65%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.07%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.72%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 74
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 230
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 401
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 894
1 Year rr_AverageAnnualReturnYear01 (13.28%)
5 Years rr_AverageAnnualReturnYear05 5.67%
10 Years rr_AverageAnnualReturnYear10 12.11%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Oct. 31, 2003
(American Beacon Bridgeway Large Cap Value 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 0.65%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.40%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.05%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 107
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 334
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 579
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,283
Annual Return 2009 rr_AnnualReturn2009 24.92%
Annual Return 2010 rr_AnnualReturn2010 14.51%
Annual Return 2011 rr_AnnualReturn2011 2.33%
Annual Return 2012 rr_AnnualReturn2012 17.68%
Annual Return 2013 rr_AnnualReturn2013 37.28%
Annual Return 2014 rr_AnnualReturn2014 13.89%
Annual Return 2015 rr_AnnualReturn2015 (1.51%)
Annual Return 2016 rr_AnnualReturn2016 15.81%
Annual Return 2017 rr_AnnualReturn2017 15.52%
Annual Return 2018 rr_AnnualReturn2018 (13.56%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 17.15% 3rd Quarter 2009 1/1/2009 through 12/31/2018
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 17.15%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -16.16% 4th Quarter 2018 1/1/2009 through 12/31/2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (16.16%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (13.56%)
5 Years rr_AverageAnnualReturnYear05 5.34%
10 Years rr_AverageAnnualReturnYear10 11.86%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 03, 2012
(American Beacon Bridgeway Large Cap Value Fund℠) | Investor Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (15.28%)
5 Years rr_AverageAnnualReturnYear05 4.34%
10 Years rr_AverageAnnualReturnYear10 11.17%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 03, 2012
(American Beacon Bridgeway Large Cap Value Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (6.84%)
5 Years rr_AverageAnnualReturnYear05 4.16%
10 Years rr_AverageAnnualReturnYear10 9.90%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 03, 2012
(American Beacon Stephens Mid-Cap Growth Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund seeks long-term growth of capital.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>
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 35 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 41 of the statement of additional information ("SAI"). With respect to purchases of shares through specific intermediaries, you may find additional information regarding sales charge discounts and waivers in Appendix A to the Fund's Prospectus entitled "Intermediary Sales Charge Discounts and Waivers". Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination April 30, 2020
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Other Expenses for R6 Class shares 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.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees Due to the restatement of management fees, the Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets provided in the Financial Highlights table.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Example</b></div>
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 April 30, 2020. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>
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 38% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 38.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>
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 equity securities of medium capitalization companies. The Fund considers a company to be a medium capitalization company if it has a market capitalization (stock market worth), at the time of investment, between $1 billion and the market capitalization of the largest company in the Russell Midcap® Index, which was $35.6 billion as of December 31, 2018.
Most of the assets of the Fund are invested in U.S. common stocks that Stephens Investment Management Group, LLC ("SIMG") believes have clear indicators of future earnings growth, or that demonstrate other potential for growth of capital. The Fund may invest in other securities, including preferred stock, securities convertible into common stock, U.S dollar denominated foreign stock traded on U.S. exchanges, American Depositary Receipts ("ADRs") and real estate investment trusts ("REITs"). The Fund also may invest in stocks of large-capitalization companies. In selecting companies for the Fund, SIMG employs quantitative analysis and fundamental research with a focus on earnings growth. SIMG will sell a security when appropriate and consistent with the Fund's investment objective and policies.
Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning to reflect its benchmark index, the Fund may have significant positions in particular sectors, including the Information Technology sector. However, as the sector composition of the Fund's portfolio changes over time, the Fund's exposure to the Information Technology sector may be lower at a future date, and the Fund's exposure to other market sectors may be higher.
The Fund may also invest cash balances in other investment companies, including money market funds, and may lend its securities to broker-dealers and other institutions to earn additional income.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>
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, which are described in alphabetical order and not in order of importance or potential exposure, 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. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service providers, to suffer data corruption or lose operational functionality. It is not possible for the Fund or its service providers to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.
Equity Investments Risk
Equity securities are subject to investment and market 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 U.S. dollar-denominated foreign stocks traded on U.S. exchanges. Such investments may expose the Fund to additional risks.
  • Common Stock. The value of a company's common stock may fall as a result of factors affecting the company, companies in the same industry or sector, or the financial markets overall. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company.
  • Convertible Securities. Convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities' investment value. Convertible securities are also sensitive to movements in interest rates.
  • Depositary Receipts. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to: currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.
  • Preferred Stock. Preferred stocks are sensitive to movements in interest rates. Preferred stocks may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders.
  • REITs. Investments in REITs are subject to the risks associated with investing in the real estate industry such as adverse developments affecting the real estate industry and real property values. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. Domestic REITs could be adversely affected by failure to qualify for tax-free "pass-through" of distributed net income and net realized gains under the Internal Revenue Code of 1986, as amended ("Internal Revenue Code"), or to maintain their exemption from registration under the Investment Company Act of 1940, as amended ("Investment Company Act"). REITs typically incur fees that are separate from those incurred by the Fund. Accordingly, the Fund's investment in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs' operating expenses, in addition to paying Fund expenses. The value of REIT common stock may decline when interest rates rise.
Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.
Growth Companies 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 go down, even if earnings showed an absolute increase. Growth company stocks may lack the dividend yield that can cushion stock prices in market downturns.
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 the high growth rates of successful smaller companies, especially during periods of economic expansion.
Market Risk
The Fund is subject to the risk that the securities markets will move down, sometimes rapidly and unpredictably based on overall economic conditions and other factors. The value of a security may decline due to general market conditions which are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investment sentiment generally. Changes in the financial condition of a single issuer can impact a market as a whole. A rise in protectionist trade policies, risks associated with the United Kingdom's vote to leave the European Union, the risk of a "trade war" between the United States and China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time.
Mid-Capitalization Companies Risk
Investing in the securities of mid-capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies. Since mid-capitalization companies may have narrower commercial markets and more limited operating history, product lines, and managerial and financial resources than larger, more established companies, the securities of these companies may lack sufficient market liquidity, and they can be particularly sensitive to expected changes in interest rates, borrowing costs and earnings.
Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including money market funds. To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund's direct fees and expenses and will be subject to the risks associated with investments in those companies. For example, money market funds are subject to interest rate risk, credit risk, and market risk.
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.
  • Information Technology Sector Risk. The market prices of information technology-related securities tend to exhibit a greater degree of market risk and sharp price fluctuations than other types of securities. These securities may fall in and out of favor with investors rapidly, which may cause sudden selling and dramatically lower market prices.
Securities Lending Risk
To the extent the Fund lends its securities, it may be subject to the following risks: i) borrowers of the Fund's securities typically provide collateral in the form of cash that is reinvested in securities, ii) the securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers, iii) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund's ability to vote proxies or to settle transactions, and iv) there is the risk of possible loss of rights in the collateral should the borrower fail financially.
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.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>
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 Investor Class and Institutional Class shares of the Fund have adopted the performance history and financial statements of the Class A and Class I shares, respectively, of the Fund's predecessor. The performance of the Fund's Investor Class shares shown in the chart and table below represents the returns achieved by the Class A shares of the Fund's predecessor from January 1, 2009 through February 23, 2012, and the performance of the Investor Class from February 24, 2012 through December 31, 2018. The performance shown for the Institutional Class shares of the Fund represents the performance of the Class I shares of the Fund's predecessor from January 1, 2009 through February 23, 2012, and the performance of the Institutional Class shares from February 24, 2012 through December 31, 2018. The table below also shows the performance of the A Class, C Class, Y Class, R6 Class and Institutional Class shares of the Fund. Returns shown for the Fund's Y Class, A Class and C Class shares represent the returns achieved by the Class A shares of the Fund's predecessor from January 1, 2009 through February 23, 2012, and the performance of the Fund's Y Class, A Class and C Class shares, respectively, from February 24, 2012 through December 31, 2018. Returns shown for the Fund's R6 Class shares represent the returns achieved by the Class I shares of the Fund's predecessor from January 1, 2009 through February 23, 2012, and the performance of the Institutional Class shares from February 24, 2012 through December 30, 2018, and the performance of the R6 Class shares on December 31, 2018. In each case, the newer share classes would have had similar annual returns to the predecessor Fund's Class A and Class I shares because the shares of each class represent investments in the same portfolio securities. However, the older share classes had different expenses than the newer share classes, which would affect performance. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Calendar year total returns for Investor Class Shares. Year Ended 12/31</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarterly Return:
16.31% 3rd Quarter 2009
1/1/2009 through 12/31/2018
Lowest Quarterly Return:
-17.27% 4th Quarter 2018
1/1/2009 through 12/31/2018
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Average annual total returns for periods ended December 31, 2018</b></div>
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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares; 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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation.
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 Stephens Mid-Cap Growth Fund℠) | Russell Midcap Growth Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.75%)
5 Years rr_AverageAnnualReturnYear05 7.42%
10 Years rr_AverageAnnualReturnYear10 15.12%
(American Beacon Stephens Mid-Cap Growth 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 0.80% [4]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.27%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.32% [5]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.03%) [6]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.29%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 699
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 966
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,254
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,071
1 Year rr_AverageAnnualReturnYear01 (4.03%)
5 Years rr_AverageAnnualReturnYear05 5.74%
10 Years rr_AverageAnnualReturnYear10 13.94%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 24, 2012
(American Beacon Stephens Mid-Cap Growth 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 0.80% [4]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.26%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.06% [5]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [6]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.04%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 307
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 644
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,107
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,388
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 207
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 644
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,107
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,388
1 Year rr_AverageAnnualReturnYear01 0.07%
5 Years rr_AverageAnnualReturnYear05 6.19%
10 Years rr_AverageAnnualReturnYear10 14.03%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 24, 2012
(American Beacon Stephens Mid-Cap Growth 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 0.80% [4]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.27%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.07% [5]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [6]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.99%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 101
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 332
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 582
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,298
1 Year rr_AverageAnnualReturnYear01 2.08%
5 Years rr_AverageAnnualReturnYear05 7.31%
10 Years rr_AverageAnnualReturnYear10 14.87%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 24, 2012
(American Beacon Stephens Mid-Cap Growth Fund℠) | Class R6  
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 0.80% [4]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.18% [7]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.98% [5]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.14%) [6]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.84%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 86
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 298
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 528
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,189
1 Year rr_AverageAnnualReturnYear01 2.20%
5 Years rr_AverageAnnualReturnYear05 7.43%
10 Years rr_AverageAnnualReturnYear10 15.01%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Dec. 31, 2018
(American Beacon Stephens Mid-Cap Growth 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 0.80% [4]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.23%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.03% [5]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.14%) [6]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.89%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 91
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 314
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 555
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,247
1 Year rr_AverageAnnualReturnYear01 2.20%
5 Years rr_AverageAnnualReturnYear05 7.43%
10 Years rr_AverageAnnualReturnYear10 15.01%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Aug. 31, 2006
(American Beacon Stephens Mid-Cap Growth 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 0.80% [4]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.47%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.27% [5]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [6]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.25%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 127
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 401
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 695
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,532
Annual Return 2009 rr_AnnualReturn2009 39.94%
Annual Return 2010 rr_AnnualReturn2010 27.89%
Annual Return 2011 rr_AnnualReturn2011 2.45%
Annual Return 2012 rr_AnnualReturn2012 14.75%
Annual Return 2013 rr_AnnualReturn2013 32.71%
Annual Return 2014 rr_AnnualReturn2014 2.97%
Annual Return 2015 rr_AnnualReturn2015 (1.63%)
Annual Return 2016 rr_AnnualReturn2016 6.42%
Annual Return 2017 rr_AnnualReturn2017 27.97%
Annual Return 2018 rr_AnnualReturn2018 1.91%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 16.31% 3rd Quarter 2009 1/1/2009 through 12/31/2018
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 16.31%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -17.27% 4th Quarter 2018 1/1/2009 through 12/31/2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (17.27%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 1.91%
5 Years rr_AverageAnnualReturnYear05 7.05%
10 Years rr_AverageAnnualReturnYear10 14.65%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 01, 2006
(American Beacon Stephens Mid-Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (0.22%)
5 Years rr_AverageAnnualReturnYear05 5.41%
10 Years rr_AverageAnnualReturnYear10 13.66%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 01, 2006
(American Beacon Stephens Mid-Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 2.58%
5 Years rr_AverageAnnualReturnYear05 5.33%
10 Years rr_AverageAnnualReturnYear10 12.28%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 01, 2006
(American Beacon Stephens Small Cap Growth Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund seeks long-term growth of capital.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>
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 35 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 41 of the statement of additional information ("SAI"). With respect to purchases of shares through specific intermediaries, you may find additional information regarding sales charge discounts and waivers in Appendix A to the Fund's Prospectus entitled "Intermediary Sales Charge Discounts and Waivers". Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination April 30, 2020
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Other Expenses for R6 Class shares 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Example</b></div>
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 R6 Class shares through April 30, 2020. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>
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 16% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 16.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>
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 equity securities of small capitalization companies. The Fund considers a company to be a small capitalization company if it has a market capitalization (stock market worth), at the time of investment, similar to the market capitalizations of the companies in the Russell 2000 Index. The capitalization range of that index is subject to change over time due to market activity or changes in the composition of the index. As of December 31, 2018, the market capitalizations of the companies in the Russell 2000 Index ranged from $7.9 million to $6.3 billion.
Most of the assets of the Fund are invested in U.S. common stocks the sub-advisor, Stephens Investment Management Group, LLC ("SIMG"), believes have clear indicators of future earnings growth, or that demonstrate other potential for growth of capital. The Fund may invest in other securities, including preferred stock, securities convertible into common stock, real estate investment trusts ("REITs"), American Depositary Receipts ("ADRs") and U.S dollar denominated foreign stock traded on U.S. exchanges. In selecting companies for the Fund, SIMG employs quantitative analysis and fundamental research with a focus on earnings growth. SIMG will sell a security when appropriate and consistent with the Fund's investment objectives and policies.
Although the Fund seeks investments across a number of sectors, from time to time, based on portfolio positioning to reflect its benchmark index, the Fund may have significant positions in particular sectors, including the Information Technology sector. However, as the sector composition of the Fund's portfolio changes over time, the Fund's exposure to the Information Technology sector may be lower at a future date, and the Fund's exposure to other market sectors may be higher.
The Fund may also invest cash balances in other investment companies, including money market funds, and may lend its securities to broker-dealers and other institutions to earn additional income.
Risk [Heading] rr_RiskHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>
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, which are described in alphabetical order and not in order of importance or potential exposure, 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. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service providers, to suffer data corruption or lose operational functionality. It is not possible for the Fund or its service providers to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.
Equity Investments Risk
Equity securities are subject to investment and market 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 U.S. dollar-denominated foreign stocks traded on U.S. exchanges. Such investments may expose the Fund to additional risks.
  • Common Stock. The value of a company's common stock may fall as a result of factors affecting the company, companies in the same industry or sector, or the financial markets overall. Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company.
  • Convertible Securities. Convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities' investment value. Convertible securities are also sensitive to movements in interest rates.
  • Depositary Receipts. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to: currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.
  • Preferred Stock. Preferred stocks are sensitive to movements in interest rates. Preferred stocks may be less liquid than common stocks and, unlike common stocks, participation in the growth of an issuer may be limited. Distributions on preferred stocks generally are payable at the discretion of an issuer and after required payments to bond holders.
  • REITs. Investments in REITs are subject to the risks associated with investing in the real estate industry such as adverse developments affecting the real estate industry and real property values. REITs also are dependent upon the skills of their managers and are subject to heavy cash flow dependency or self-liquidation. Domestic REITs could be adversely affected by failure to qualify for tax-free "pass-through" of distributed net income and net realized gains under the Internal Revenue Code of 1986, as amended ("Internal Revenue Code"), or to maintain their exemption from registration under the Investment Company Act of 1940, as amended ("Investment Company Act"). REITs typically incur fees that are separate from those incurred by the Fund. Accordingly, the Fund's investment in REITs will result in the layering of expenses such that shareholders will indirectly bear a proportionate share of the REITs' operating expenses, in addition to paying Fund expenses. The value of REIT common stock may decline when interest rates rise.
Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.
Growth Companies 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 go down, even if earnings showed an absolute increase. Growth company stocks may lack the dividend yield that can cushion stock prices in market downturns.
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.
Market Risk
The Fund is subject to the risk that the securities markets will move down, sometimes rapidly and unpredictably based on overall economic conditions and other factors. The value of a security may decline due to general market conditions which are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investment sentiment generally. Changes in the financial condition of a single issuer can impact a market as a whole. A rise in protectionist trade policies, risks associated with the United Kingdom's vote to leave the European Union, the risk of a "trade war" between the United States and China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time.
Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including money market funds. To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund's direct fees and expenses and will be subject to the risks associated with investments in those companies. For example, money market funds are subject to interest rate risk, credit risk, and market risk.
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.
  • Information Technology Sector Risk. The market prices of information technology-related securities tend to exhibit a greater degree of market risk and sharp price fluctuations than other types of securities. These securities may fall in and out of favor with investors rapidly, which may cause sudden selling and dramatically lower market prices.
Securities Lending Risk
To the extent the Fund lends its securities, it may be subject to the following risks: i) borrowers of the Fund's securities typically provide collateral in the form of cash that is reinvested in securities, ii) the securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers, iii) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund's ability to vote proxies or to settle transactions, and iv) there is the risk of possible loss of rights in the collateral should the borrower fail financially.
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.
Small Capitalization Companies Risk
Investing in the securities of small capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization and more established companies. Since smaller companies may have narrower commercial markets, and more limited operating history, product lines, and managerial and financial resources than larger, more established companies, the securities of these companies may lack sufficient market liquidity and they can be particularly sensitive to expected changes in interest rates, borrowing costs and earnings.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>
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 Investor Class and Institutional Class shares of the Fund have adopted the performance history and financial statements of the Class A and Class I shares, respectively, of the Fund's predecessor. The performance of the Fund's Investor Class shares shown in the chart and table below represents the returns achieved by the Class A shares of the Fund's predecessor from January 1, 2009 through February 23, 2012 and the performance of the Fund's Investor Class shares from February 24, 2012 through December 31, 2018. The table below also shows the performance of the A Class, C Class, Y Class and Institutional Class shares of the Fund. The performance shown for the Institutional Class shares of the Fund represents the performance of the Class I shares of the Fund's predecessor from January 1, 2009 through February 23, 2012, and the Institutional Class shares from February 24, 2012 through December 31, 2018. Returns shown for the Fund's Y Class, A Class and C Class shares represent the returns achieved by the Class A shares of the Fund's predecessor from January 1, 2009 through February 23, 2012, and the performance of the Fund's Y Class, A Class and C Class shares, respectively, from February 24, 2012 through December 31, 2018. In each case, the newer share classes would have had similar annual returns to the predecessor Fund's Class A and Class I shares because the shares of each class represent investments in the same portfolio securities. However, the older share classes had different expenses than the newer share classes, which would affect performance. Performance information for R6 Class shares of the Fund is not provided because this share class had not commenced operations prior to the date of this Prospectus. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Calendar year total returns for Investor Class Shares. Year Ended 12/31</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarterly Return:
23.02% 2nd Quarter 2009
1/1/2009 through 12/31/2018
Lowest Quarterly Return:
-21.46% 4th Quarter 2018
1/1/2009 through 12/31/2018
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Average annual total returns for periods ended December 31, 2018</b></div>
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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares; 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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation.
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 Stephens Small Cap Growth Fund℠) | Russell 2000 Growth Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (9.31%)
5 Years rr_AverageAnnualReturnYear05 5.13%
10 Years rr_AverageAnnualReturnYear10 13.52%
(American Beacon Stephens Small Cap Growth 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 0.98%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.15%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.38%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets none [8]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.38%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 707
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 987
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,287
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,137
1 Year rr_AverageAnnualReturnYear01 (2.87%)
5 Years rr_AverageAnnualReturnYear05 3.01%
10 Years rr_AverageAnnualReturnYear10 12.81%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 24, 2012
(American Beacon Stephens Small Cap Growth 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 0.98%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.17%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.15%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets none [8]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.15%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 318
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 673
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,154
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,483
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 218
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 673
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,154
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,483
1 Year rr_AverageAnnualReturnYear01 1.19%
5 Years rr_AverageAnnualReturnYear05 3.45%
10 Years rr_AverageAnnualReturnYear10 12.89%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 24, 2012
(American Beacon Stephens Small Cap Growth 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 0.98%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.17%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.15%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets none [8]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.15%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 117
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 365
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 633
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,398
1 Year rr_AverageAnnualReturnYear01 3.18%
5 Years rr_AverageAnnualReturnYear05 4.52%
10 Years rr_AverageAnnualReturnYear10 13.73%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Feb. 24, 2012
(American Beacon Stephens Small Cap Growth Fund℠) | Class R6  
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 0.98%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.12% [9]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.10%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.05%) [8]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.05%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 107
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 345
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 602
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,336
(American Beacon Stephens Small Cap Growth 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 0.98%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.11%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.09%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets none [8]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.09%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 111
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 347
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 601
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,329
1 Year rr_AverageAnnualReturnYear01 3.26%
5 Years rr_AverageAnnualReturnYear05 4.61%
10 Years rr_AverageAnnualReturnYear10 13.87%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Aug. 31, 2006
(American Beacon Stephens Small Cap Growth 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 0.98%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.40%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.38%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets none [8]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.38%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 141
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 437
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 755
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,657
Annual Return 2009 rr_AnnualReturn2009 36.25%
Annual Return 2010 rr_AnnualReturn2010 26.37%
Annual Return 2011 rr_AnnualReturn2011 1.50%
Annual Return 2012 rr_AnnualReturn2012 15.92%
Annual Return 2013 rr_AnnualReturn2013 42.62%
Annual Return 2014 rr_AnnualReturn2014 (3.35%)
Annual Return 2015 rr_AnnualReturn2015 (5.08%)
Annual Return 2016 rr_AnnualReturn2016 9.76%
Annual Return 2017 rr_AnnualReturn2017 19.23%
Annual Return 2018 rr_AnnualReturn2018 2.93%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 23.02% 2nd Quarter 2009 1/1/2009 through 12/31/2018
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 23.02%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -21.46% 4th Quarter 2018 1/1/2009 through 12/31/2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (21.46%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 2.93%
5 Years rr_AverageAnnualReturnYear05 4.32%
10 Years rr_AverageAnnualReturnYear10 13.57%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Dec. 01, 2005
(American Beacon Stephens Small Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (4.84%)
5 Years rr_AverageAnnualReturnYear05 2.04%
10 Years rr_AverageAnnualReturnYear10 11.94%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Dec. 01, 2005
(American Beacon Stephens Small Cap Growth Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 7.02%
5 Years rr_AverageAnnualReturnYear05 3.23%
10 Years rr_AverageAnnualReturnYear10 11.32%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Dec. 01, 2005
(American Beacon AHL Managed Futures Strategy Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund's investment objective is capital growth.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>
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 30 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 39 of the statement of additional information ("SAI"). With respect to purchases of shares through specific intermediaries, you may find additional information regarding sales charge discounts and waivers in Appendix A to the Fund's Prospectus entitled "Intermediary Sales Charge Discounts and Waivers". Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination April 30, 2020
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Example</b></div>
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 April 30, 2020. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>
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 most recent fiscal year is not provided because the Fund did not invest in any long-term securities during the reporting period.
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund seeks to achieve its investment objective by implementing a quantitative trading strategy and systematic investment process designed to capitalize on price trends (up and/or down) in a broad range of global markets including stock indices, bonds and bond futures, currency and currency futures, and interest rates by utilizing derivative instruments. As the owner of a "long" position in a derivative instrument, the Fund may benefit from an increase in the price of the underlying investment and, as the owner of a "short" position, the Fund may benefit from a decrease in the price of the underlying investment.
The Fund invests primarily in futures, bonds, currency, options and forward contracts. The Fund also may invest in warrants, swaps and other types of derivative instruments linked to stock indices, currencies, bonds, interest rates and commodity instruments. In connection with the Fund's use of derivatives, the Fund also holds significant amounts of U.S. Treasury securities and other foreign developed market sovereign short-term bonds issued by countries such as France, Germany, Japan and other developed countries, or short-term investments, including money market funds, cash and time deposits in order to meet applicable asset coverage requirements under the Investment Company Act of 1940, as amended (the "Investment Company Act"). The Fund's investments are generally made without restriction as to issuer market capitalization, country, currency, maturity or credit rating. The Fund may invest in below investment grade securities, which are commonly referred to as "junk bonds" and in issuers in the U.S. and foreign developed and emerging markets.
The Fund seeks to gain exposure to the commodity futures markets by investing up to 25% of its total assets in a wholly-owned subsidiary, which is organized under the laws of the Cayman Islands (the "Subsidiary"). Generally, the Subsidiary invests primarily in commodity futures, but it may also invest in financial futures and forwards, options and swap contracts, fixed income securities, pooled investment vehicles, including open-end investment companies and exchange-traded funds ("ETFs"), and other investments intended to serve as margin or collateral for the Subsidiary's derivative positions. The Fund invests in the Subsidiary in order to gain exposure to the commodities markets within the limitations of the federal tax law, rules and regulations that apply to "regulated investment companies." Unlike the Fund, the Subsidiary may invest without limitation in commodity-linked derivatives, however, the Subsidiary and the Fund, in the aggregate, comply with applicable Investment Company Act asset coverage requirements with respect to their total investments in commodity-linked derivatives. In addition, the Fund and the Subsidiary comply with the same fundamental investment restrictions on an aggregate basis and the Subsidiary follows the same compliance policies and procedures as the Fund to the extent those restrictions, policies and procedures are applicable to the investment activities of the Subsidiary. Unlike the Fund, the Subsidiary does not, and will not, seek to qualify as a "regulated investment company" under Subchapter M of Chapter 1 of Subtitle A of the Internal Revenue Code of 1986, as amended ("Subchapter M"). The Fund is the sole shareholder of the Subsidiary and does not expect shares of the Subsidiary to be offered or sold to other investors.
The sub-advisor employs computerized processes to identify investment opportunities across a wide range of markets around the world. Investment decisions are executed via the sub-advisor's proprietary execution strategy. The investment decision process is quantitative and primarily directional in nature, meaning that investment decisions are driven by mathematical models based on market trends and other historical relationships. It is underpinned by risk control, ongoing research, diversification and the quest for efficiency. The Fund's holdings may be frequently adjusted to reflect the sub-advisor's assessment of changing risks, which could result in high portfolio turnover.
The cornerstone of the sub-advisor's investment philosophy is that the financial markets exhibit trends and other inefficiencies. Trends are a manifestation of serial correlation in financial markets — the phenomenon whereby past price movements influence price behavior. Although price trends vary in their intensity, duration and frequency they typically recur across sectors and markets. Trends are an attractive focus for active trading styles applied across a range of global markets. In implementing its investment program, the Fund may hold significant cash positions from time to time. Accordingly, the sub-advisor will make investment decisions for cash management purposes. Such arrangements may include entering into repurchase agreements or investing in cash equivalents.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
There is no assurance that the Fund will achieve its investment objectives and you could lose part or all of your investment in the Fund. The Fund is not designed for investors who need an assured level of current income and is intended to be a long-term investment. The Fund is not a complete investment program and may not be appropriate for all investors. Investors should carefully consider their own investment goals and risk tolerance before investing in the Fund. The principal risks of investing in the Fund, which are described in alphabetical order and not in order of importance or potential exposure, are:
Allocation Risk
The Manager's and 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 Selection Risk
Assets selected by the sub-advisor or the Manager for the Fund may not perform to expectations. The sub-advisor's investment models may rely in part on data derived from third parties and may not perform as intended. This could result in the Fund's underperformance compared to other funds with similar investment objectives.
Commodities Risk
The Fund's investments in commodity-linked derivative instruments may subject the Fund to greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates, or factors affecting a particular industry or commodity, such as changes in supply and demand, drought, floods, weather, livestock disease, embargoes, tariffs, war, acts of terrorism and international economic, political and regulatory developments. The Fund and the Subsidiary each may invest significantly in a particular sector of the commodities market (such as oil, metal or agricultural products). As a result, the Fund and the Subsidiary may be more susceptible to risks associated with those sectors. The Fund's investments in commodity-related instruments may lead to losses in excess of the Fund's investment in such products. Such losses can significantly and adversely affect the NAV per share of the Fund and, consequently, a shareholder's interest in the Fund.
Counterparty Risk
The Fund is subject to the risk that a party or participant to a transaction, such as a broker or derivative counterparty, will be unwilling or unable to satisfy its obligation to make timely principal, interest or settlement payments or to otherwise honor its obligations to the Fund.
Credit Risk
The Fund is subject to the risk that the issuer or guarantor of an obligation, or the counterparty to a transaction, including a derivatives contract or a loan will fail to make timely payment of interest or principal or otherwise honor its obligations or default completely. Credit risk is typically greater for securities with ratings that are below investment grade (commonly referred to as "junk bonds."). Since the Fund can invest significantly in high yield investments considered speculative in nature, this risk may be substantial.
Crowding/Convergence Risk
There is significant competition among quantitatively-focused managers and the ability of the sub-advisor to deliver returns that have a low correlation with global aggregate equity markets and other funds is dependent on their ability to employ models that are simultaneously profitable and differentiated from those employed by other managers. To the extent that the sub-advisor is not able to develop sufficiently differentiated models, the Fund's investment objective may not be met, irrespective of whether the models are profitable in an absolute sense.
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 or by purchasing or selling forward currency exchange contracts in non-U.S. currencies, including both non-deliverable forwards ("NDFs") and deliverable forwards, non-U.S. currency futures contracts, options (including non-deliverable options NDOs on non-U.S. currencies and non-U.S. currency futures) and swaps for cross-currency transactions. Foreign currencies will fluctuate, and may decline, in value relative to the U.S. dollar and other currencies and thereby affect the Fund's investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies.
Cybersecurity and Operational Risk
The Fund and its service providers, and shareholders' ability to transact with the Fund, may be negatively impacted due to operational risks arising from, among other problems: human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service providers, to suffer data corruption or lose operational functionality. It is not possible for the Fund or its service providers to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.
Derivatives Risk
Derivatives may involve significant risk. The use of derivative instruments may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities or other instruments underlying those derivatives, including the high degree of leverage often embedded in such instruments, and potential material and prolonged deviations between the theoretical value and realizable value of a derivative. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. Derivatives may be illiquid and may be more volatile than other types of investments. The Fund may buy or sell derivatives not traded on an exchange and which may be subject to heightened liquidity and valuation risk. Derivative investments can increase portfolio turnover and transaction costs. Derivatives also are subject to counterparty risk and credit risk. As a result, the Fund may obtain no recovery of its investment or may only obtain a limited recovery, and any recovery may be delayed. Not all derivative transactions require a counterparty to post collateral, which may expose the Fund to greater losses in the event of a default by a counterparty. Ongoing changes to regulation of the derivatives market 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 the parties agree to 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 be an imperfect correlation between the movement in the prices of futures contracts and the value of the 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, and forward currency contracts 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, there is a risk that the Fund may be required to sell 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 unexercised, the Fund will experience a gain or loss from the sale of the underlying instrument.
  • 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 leverage 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 equity investments risk, liquidity risk and counterparty risk. Interest rate swaps, total return swaps, cross-currency swaps, credit default swaps and commodities swaps are subject to counterparty risk, credit risk and liquidity risk. In addition to these risks, interest rate swaps are subject to interest rate risk, 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, commodities swaps are subject to commodities risk, and credit default swaps are subject to the risks associated with the purchase and sale of credit protection.
  • 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 at times, and there may 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.
Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.
  • Investing in Developed Countries Risk. The Fund's investment in a developed country issuer may subject the fund to regulatory, political, currency, security, economic and other risks associated with developed countries. Developed countries tend to represent a significant portion of the global economy and have generally experienced slower economic growth than some less developed countries. In addition, developed countries may be impacted by changes to the economic conditions of certain key trading partners, regulatory burdens, debt burdens and the price or availability of certain commodities.
Hedging Risk
If the Fund uses a hedging instrument at the wrong time or judges the market conditions incorrectly, or the hedged instrument does not correlate to the risk sought to be hedged, the hedge might be unsuccessful, reduce the Fund's return, or create a loss. In addition, hedges, even when successful in mitigating risk, may not prevent the Fund from experiencing losses on its investments, and therefore the use of hedging strategies may reduce the Fund's return, or create a loss.
High Portfolio Turnover Risk
Portfolio turnover is a measure of the Fund's trading activity over a one-year 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 had a lower portfolio turnover rate.
High Yield Securities Risk
Exposure to 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 will decline due to rising interest rates. Generally, the value of investments with interest rate risk, such as fixed income securities, will move in the opposite direction to movements in interest rates. The Federal Reserve has raised the federal funds rate several times since December 2015 and may continue to increase rates in the future. Interest rates may rise, perhaps significantly and/or rapidly, potentially resulting in substantial losses to the Fund. The prices of fixed income securities or derivatives are also affected by their duration. Fixed income securities or derivatives with longer durations generally have greater sensitivity to changes in interest rates. An increase in interest rates can impact markets broadly as well. Some investors buy securities and derivatives with borrowed money; an increase in interest rates can cause a decline in those markets.
Investment Risk
An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. When you sell your shares of the Fund, they could be worth less than what you paid for them. Therefore, you may lose money by investing in the Fund.
Issuer Risk
The value of, and/or the return generated by, a security may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer's goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets.
Leverage Risk
The Fund's use of derivative instruments, repurchase agreements 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. Leverage may result in losses that exceed the amount originally invested and may accelerate the rate of losses. Leverage tends to magnify, sometimes significantly, the effect of any increase or decrease in the Fund's exposure to an asset or class of assets and may cause the Fund's 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 or impossible to purchase or sell at favorable times or prices. Market prices for such instruments may be volatile. 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, liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Unexpected redemptions may force the Fund 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 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
In recent periods, fixed income instruments have experienced unusual liquidity issues, increased price volatility and, in some cases, credit downgrades and increased likelihood of default. These events have reduced the willingness and ability of some lenders to extend credit, and have made it more difficult for some borrowers to obtain financing on attractive terms, if at all. In addition, global economies and financial markets are becoming increasingly interconnected, which increases the possibilities that conditions in one country or region might adversely impact issuers in a different country or region. A rise in protectionist trade policies, risks associated with the United Kingdom's vote to leave the European Union, the risk of a "trade war" between the United States and China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasi-governmental organizations.
In addition, political and governmental 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.
Model and Data Risk
The sub-advisor relies heavily on proprietary trading models ("Models") and both proprietary and third party provided data ("Data"), rather than granting trade-by-trade discretion to the sub-advisor's investment professionals. In combination, Models and Data are used to construct investment decisions, to value both current and potential investments, to provide risk management insights and to assist in hedging the Fund's positions and investments.
Models and Data are known to have errors, omissions, imperfections and malfunctions (collectively, "System Events").
The investment manager seeks to reduce the incidence and impact of System Events, to the extent feasible, through a combination of internal testing, simulation, real-time monitoring, use of independent safeguards in the overall portfolio management process and often in the software code itself.
Non-Diversification Risk
The Fund is non-diversified, which means it 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.
Obsolescence Risk
The Fund is unlikely to be successful in the deployment of its quantitative investment strategies unless the assumptions underlying the Models are realistic and either remain realistic and relevant in the future or are adjusted to account for changes in the overall market environment. If such assumptions are inaccurate or become inaccurate and are not promptly adjusted, it is likely that profitable trading signals will not be generated. If and to the extent that the Models do not reflect certain factors, and the sub-advisor does not successfully address such omission through its testing and evaluation and modify the Models accordingly, major losses may result — all of which will be borne by the Fund.
Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including money market funds and exchange-traded funds ("ETFs"). To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund's direct fees and expenses and will be subject to the risks associated with investments in those companies. For example, money market funds are subject to interest rate risk, credit risk, and market risk. To the extent the Fund invests in ETFs that invest in equity securities, fixed income securities and/or foreign securities, or that track an index, the Fund would be subject to the risks associated with the underlying investments held by the ETF or the index fluctuations to which the ETF is subject. Because ETFs are listed on an exchange, they may be subject to trading halts, may trade at a discount or premium to their net asset value ("NAV") and may not be liquid. ETF shares may trade at a premium or discount to their NAV. An ETF that tracks an index may not precisely replicate the returns of its benchmark index.
Quantitative Strategy Risk
The success of the Fund's investment strategy may depend in part on the effectiveness of the sub-advisor's quantitative tools for screening securities. These strategies may incorporate factors that are not predictive of a security's value. Additionally, a previously successful strategy may become outdated or inaccurate, possibly resulting in losses.
Repurchase Agreement Risk
The use of repurchase agreements involves counterparty risk and credit risk. The obligations of a counterparty to a repurchase agreement are not guaranteed. The Fund permits various forms of securities as collateral whose values fluctuate and that are not issued or guaranteed by the U.S. Government. There are risks that a counterparty may default at a time when the collateral has declined in value, or a counterparty may become insolvent and subject to liquidation, which may affect the Fund's right to control the collateral.
Risk Management
Risk is an essential part of investing. No risk management program can eliminate the Fund's exposure to adverse events; at best, it can only reduce the possibility that the Fund will be affected by such events, and especially those risks that are not intrinsic to the Fund's investment program.
Risk of Programming and Modeling Error
The success of the sub-advisor's investment strategy depends largely on the effectiveness of its quantitative research models and investment programs. The programs may not react as expected to market events resulting in losses for the Fund. Additionally, programs may become outdated or experience malfunctions which may not be identified by the sub-advisor and therefore may also result in losses to the Fund.
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.
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.
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.
Subsidiary Risk
By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary's investments. The derivatives and other investments held by the Subsidiary are generally similar to those that are permitted to be held by the Fund and are subject to the same risks that apply to similar investments if held directly by the Fund. These risks are described elsewhere in this Prospectus. There can be no assurance that the investment objective of the Fund or the Subsidiary will be achieved.
The Subsidiary is not registered under the Investment Company Act, and, unless otherwise noted in this Prospectus, is not subject to all the investor protections of the Investment Company Act. In addition, changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/or the Subsidiary to operate as described in this Prospectus and the SAI and could adversely affect the Fund's performance.
Tax Risk
To qualify as a "regulated investment company" under Subchapter M ("RIC"), the Fund must, among other requirements, derive at least 90% of its gross income for each taxable year from "qualifying income," which is described in more detail in the "Tax Information" section of the SAI. Income from certain commodity-linked derivative instruments in which the Fund invests is not considered qualifying income. The Fund will therefore restrict its income from direct investments in those instruments, such as commodity-linked swaps, to a maximum of 10% of its gross income for each taxable year. The Fund's investment in the Subsidiary is expected to provide the Fund with exposure to the commodities markets within the limitations of the federal tax requirements of Subchapter M.
The Internal Revenue Service ("IRS") issued a large number of private letter rulings ("PLRs") (which the Fund may not cite as precedent) from 2006 to 2011 that income a RIC derives from a wholly owned foreign subsidiary (a "controlled foreign corporation" or "CFC") (such as the Subsidiary) that earns income derived from commodity-linked derivative instruments is qualifying income. Treasury regulations published on March 19, 2019, provide that income inclusions of a RIC from a CFC are qualifying income for the RIC whether or not the CFC makes distributions to the RIC out of its associated earnings and profits for the applicable taxable year. See "Tax Information" in the SAI for further information regarding RIC's federal income tax treatment of income from CFCs and commodity-linked instruments. The federal income tax treatment of the Fund's commodity-linked investments and income from the Subsidiary may be materially adversely affected further by future legislation, other Treasury regulations, and/or guidance issued by the IRS that could affect whether income from such investments is qualifying income under Subchapter M or otherwise materially affect the character, timing or recognition, and/or amount of the Fund's taxable income and/or net capital gains and, therefore, the distributions the Fund makes.
Trading System and Execution of Orders Risk
The sub-advisor relies extensively on computer programs, systems, technology, Data and Models to implement its execution strategies and algorithms. The sub-advisor's investment strategies, trading strategies and algorithms depend on its ability to establish and maintain an overall market position in a combination of financial instruments selected by the sub-advisor. There is a risk that the sub-advisor's proprietary algorithmic trading systems may not be able to adequately react to a market event without serious disruption. Further, trading strategies and algorithms may malfunction causing severe losses. While the sub-advisor has employed tools to allow for human intervention to respond to significant system malfunctions, it cannot be guaranteed that losses will not occur in such circumstances as unforeseen market events and disruptions and execution system issues.
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''), the Federal Home Loan Mortgage Corporation (''Freddie Mac''), Federal Home Loan Bank ("FHLB"), Federal Farm Credit Bank ("FFCB"), and the Tennessee Valley Authority are not guaranteed by the U.S. Treasury and are not backed by the full faith and credit of the U.S. Government and no assurance can be given that the U.S. Government will provide financial support if these organizations do not have the funds to meet future payment obligations. U.S. Government securities and securities of government sponsored entities are also subject to credit risk, interest rate risk and market risk.
Valuation Risk
The Fund may value certain assets at a price different from the price at which they can be sold. This risk may be especially pronounced for investments that are illiquid or which may become illiquid.
Volatility Risk
The Fund may have investments that appreciate or decrease significantly in value over short periods of time. This may cause the Fund's NAV to experience significant increases or declines in value over short periods of time.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk The Fund is non-diversified, which means it 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 objectives 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>
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. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Calendar year total returns for Investor Class Shares. Year Ended 12/31</b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarterly Return:
5.58% 3rd Quarter 2015
1/1/2015 through 12/31/2018
Lowest Quarterly Return:
-6.35% 2nd Quarter 2015
1/1/2015 through 12/31/2018
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Average annual total returns for periods ended December 31, 2018</b></div>
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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for Investor Class shares; 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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation.
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 AHL Managed Futures Strategy Fund℠) | ICE BofAML 3-Month U.S. Treasury Bill Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.88%
Since Inception rr_AverageAnnualReturnSinceInception 0.71%
(American Beacon AHL Managed Futures Strategy 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% [10]
Management Fees rr_ManagementFeesOverAssets 1.35%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.45%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.05%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.11%) [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.94%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 761
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,171
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,605
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,809
1 Year rr_AverageAnnualReturnYear01 (3.71%)
Since Inception rr_AverageAnnualReturnSinceInception 2.56%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Aug. 19, 2014
(American Beacon AHL Managed Futures Strategy 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 1.35%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.43%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.78%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.69%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 372
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 854
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,461
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 3,102
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 272
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 854
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,461
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 3,102
1 Year rr_AverageAnnualReturnYear01 0.40%
Since Inception rr_AverageAnnualReturnSinceInception 3.20%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Aug. 19, 2014
(American Beacon AHL Managed Futures Strategy 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 1.35%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.37%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.72%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.08%) [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.64%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 167
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 534
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 926
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,024
1 Year rr_AverageAnnualReturnYear01 2.47%
Since Inception rr_AverageAnnualReturnSinceInception 4.29%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Aug. 19, 2014
(American Beacon AHL Managed Futures Strategy 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 1.35%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.36%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.71%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.17%) [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.54%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 157
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 522
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 912
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,005
1 Year rr_AverageAnnualReturnYear01 2.52%
Since Inception rr_AverageAnnualReturnSinceInception 4.38%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Aug. 19, 2014
(American Beacon AHL Managed Futures Strategy 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 1.35%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.62%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.97%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.05%) [11]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.92%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 195
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 613
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,058
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,292
Annual Return 2015 rr_AnnualReturn2015 (1.54%)
Annual Return 2016 rr_AnnualReturn2016 (0.67%)
Annual Return 2017 rr_AnnualReturn2017 4.78%
Annual Return 2018 rr_AnnualReturn2018 2.15%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 5.58% 3rd Quarter 2015 1/1/2015 through 12/31/2018
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 5.58%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2015
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -6.35% 2nd Quarter 2015 1/1/2015 through 12/31/2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (6.35%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2015
1 Year rr_AverageAnnualReturnYear01 2.15%
Since Inception rr_AverageAnnualReturnSinceInception 3.97%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Aug. 19, 2014
(American Beacon AHL Managed Futures Strategy Fund℠) | Investor Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.55%
Since Inception rr_AverageAnnualReturnSinceInception 2.88%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Aug. 19, 2014
(American Beacon AHL Managed Futures Strategy Fund℠) | Investor Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 1.27%
Since Inception rr_AverageAnnualReturnSinceInception 2.65%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Aug. 19, 2014
(American Beacon AHL TargetRisk Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund's investment objective is capital growth.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>
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 30 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 39 of the statement of additional information ("SAI"). With respect to purchases of shares through specific intermediaries, you may find additional information regarding sales charge discounts and waivers in Appendix A to the Fund's Prospectus entitled "Intermediary Sales Charge Discounts and Waivers". Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination April 30, 2020
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Example</b></div>
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 April 30, 2020. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>
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 most recent fiscal year is not provided because the Fund did not invest in any long-term securities during the reporting period.
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund seeks to achieve its investment objective by allocating all or substantially all of its assets across equities, bonds (including inflation index-linked bonds), interest rates, corporate credit, and commodities primarily through derivative instruments. The Fund implements its strategy by utilizing a proprietary quantitative model, which is designed to provide a stable level of volatility regardless of market conditions.
The Fund invests primarily in futures (including bond futures), swaps (including credit default swaps, total return swaps, and commodity swaps) and forward contracts, but also may invest in other types of derivative instruments. The Fund uses derivative instruments to enhance total return, to manage certain investment risks or to substitute for the purchase or sale of the underlying securities, and to hedge against currency exchange rates. In connection with the Fund's use of derivatives, the Fund also holds significant amounts of U.S. Treasury securities, or short-term investments, including money market funds, cash and time deposits in order to meet applicable asset coverage requirements under the Investment Company Act of 1940, as amended (the "Investment Company Act"). The Fund's use of derivatives will have the economic effect of financial leverage. The Fund's investments are generally made without restriction as to issuer market capitalization, country, currency, maturity or credit rating. The Fund may invest in derivatives instruments that provide exposure to below investment grade securities, which are commonly referred to as "junk bonds" and to issuers in the U.S. and foreign developed and emerging markets. The Fund may invest directly in government obligations and repurchase agreements, as well as securities denominated in non-U.S. currencies.
The sub-advisor's strategy is designed to provide an excess return with a stable level of volatility regardless of market conditions. The sub-advisor seeks to do this by using systematic algorithms (a mathematical model) to scale positions based on the net asset value ("NAV") of the Fund. The algorithm measures the degree of volatility in a particular market. If the market is turbulent, and returns are volatile, the algorithm will reduce exposure. Conversely, it will increase exposure if the market is calm. This technique is called 'volatility scaling' and can be applied at various levels to achieve a balanced risk exposure through time, and across different asset classes. Volatility scaling aims to achieve a certain target level of return which is stable through time. The Fund has set an annualized volatility target of 10% of its NAV. Volatility is defined as the annualized standard deviation of returns. It is important to note that both the short and long term realized volatility of the Fund can and will differ from the targeted volatility and can be dependent on prevailing market conditions.
In addition to the volatility scaling described above, the strategy utilizes additional systematic overlays to control downside risk. The first of these is a momentum overlay, which uses past price behavior to identify periods when a market is in a downtrend. The strategy uses this information to scale down positions depending upon the strength of that trend, thereby reducing risk in falling markets. The second is a volatility switching mechanism, which reacts quickly to spikes in volatility by using a formula that is designed to minimize market transactions during periods of low volatility and increase market transactions during periods of heightened market volatility in order to maintain the Fund's target level of volatility. Volatility switching is used to react more dynamically to market events. The third uses intraday data to identify dangerous environments in which fixed income assets no longer act as a hedge to equities and other assets. The combination of these overlays aims to reduce losses and improve risk-adjusted returns.
The Fund seeks to gain exposure to the commodity markets by investing up to 25% of its total assets in a wholly-owned subsidiary, which is organized under the laws of the Cayman Islands (the "Subsidiary"). Generally, the Subsidiary invests primarily in commodity swaps, but it may also invest in financial futures and forwards, fixed income securities, pooled investment vehicles, including open-end investment companies, and other investments intended to serve as margin or collateral for the Subsidiary's derivative positions. The Fund invests in the Subsidiary in order to gain exposure to the commodities markets within the limitations of the federal tax law, rules and regulations that apply to "regulated investment companies." Unlike the Fund, the Subsidiary may invest without limitation in commodity-linked derivatives; however, the Subsidiary and the Fund, in the aggregate, comply with applicable Investment Company Act asset coverage requirements with respect to their total investments in commodity-linked derivatives. In addition, the Fund and the Subsidiary comply with the same fundamental investment restrictions on an aggregate basis and the Subsidiary follows the same compliance policies and procedures as the Fund to the extent those restrictions, policies and procedures are applicable to the investment activities of the Subsidiary. Unlike the Fund, the Subsidiary does not, and will not, seek to qualify as a "regulated investment company" under Subchapter M of Chapter 1 of Subtitle A of the Internal Revenue Code of 1986, as amended ("Subchapter M"). The Fund is the sole shareholder of the Subsidiary and does not expect shares of the Subsidiary to be offered or sold to other investors.
The Fund's holdings may be frequently adjusted to reflect the sub-advisor's assessment of changing risks, which could result in high portfolio turnover.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
There is no assurance that the Fund will achieve its investment objectives and you could lose part or all of your investment in the Fund. The Fund is not designed for investors who need an assured level of current income and is intended to be a long-term investment. The Fund is not a complete investment program and may not be appropriate for all investors. Investors should carefully consider their own investment goals and risk tolerance before investing in the Fund. The principal risks of investing in the Fund, which are described in alphabetical order and not in order of importance or potential exposure, 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 Selection Risk
Assets selected by the sub-advisor or the Manager for the Fund may not perform to expectations. The sub-advisor's investment models may rely in part on data derived from third parties and may not perform as intended. This could result in the Fund's underperformance compared to other funds with similar investment objectives.
Commodities Risk
The Fund's investments in commodity-linked derivative instruments may subject the Fund to greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates, or factors affecting a particular industry or commodity, such as changes in supply and demand, drought, floods, weather, livestock disease, embargoes, tariffs, war, acts of terrorism and international economic, political and regulatory developments. The Fund's investments in commodity-related instruments may lead to losses in excess of the Fund's investment in such products. Such losses can significantly and adversely affect the NAV per share of the Fund and, consequently, a shareholder's interest in the Fund.
Counterparty Risk
The Fund is subject to the risk that a party or participant to a transaction, such as a broker or derivative counterparty, will be unwilling or unable to satisfy its obligation to make timely principal, interest or settlement payments or to otherwise honor its obligations to the Fund.
Credit Risk
The Fund is subject to the risk that the issuer or guarantor of an obligation, or the counterparty to a transaction, including a derivatives contract or a loan will fail to make timely payment of interest or principal or otherwise honor its obligations or default completely. Credit risk is typically greater for securities with ratings that are below investment grade (commonly referred to as "junk bonds."). Since the Fund can invest significantly in high yield investments considered speculative in nature, this risk may be substantial.
Crowding/Convergence Risk
There is significant competition among quantitatively-focused managers, and the ability of the sub-advisor to outperform other funds is dependent on their ability to employ models that are simultaneously profitable and differentiated from those employed by other managers. To the extent that the sub-advisor is not able to develop sufficiently differentiated models the Fund's investment objective may not be met, irrespective of whether the models are profitable in an absolute sense.
Currency Risk
The Fund may have exposure to foreign currencies by making investments in securities denominated in non-U.S. currencies or by purchasing or selling forward currency exchange contracts in non-U.S. currencies, non-U.S. currency futures contracts, and swaps for cross-currency transactions. Foreign currencies will fluctuate, and may decline, in value relative to the U.S. dollar and other currencies and thereby affect the Fund's investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies.
Cybersecurity and Operational Risk
The Fund and its service providers, and shareholders' ability to transact with the Fund, may be negatively impacted due to operational risks arising from, among other problems: human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service providers, to suffer data corruption or lose operational functionality. It is not possible for the Fund or its service providers to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.
Derivatives Risk
Derivatives may involve significant risk. The use of derivative instruments may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities or other instruments underlying those derivatives, including the high degree of leverage often embedded in such instruments, and potential material and prolonged deviations between the theoretical value and realizable value of a derivative. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. Derivatives may be illiquid and may be more volatile than other types of investments. The Fund may buy or sell derivatives not traded on an exchange and which may be subject to heightened liquidity and valuation risk. Derivative investments can increase portfolio turnover and transaction costs. Derivatives also are subject to counterparty risk and credit risk. As a result, the Fund may obtain no recovery of its investment or may only obtain a limited recovery, and any recovery may be delayed. Not all derivative transactions require a counterparty to post collateral, which may expose the Fund to greater losses in the event of a default by a counterparty. Ongoing changes to the regulation of the derivatives market 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 Risk. Futures and forward contracts are derivative instruments pursuant to a contract where the parties agree to 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 be an imperfect correlation between the movement in the prices of futures contracts and the value of the 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 and forward currency contracts 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.
  • Swap Agreements Risk. 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 leverage 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 equity investments risk, liquidity risk and counterparty risk. Total return swaps, credit default swaps, cross-currency swaps and commodities 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, commodities swaps are subject to commodities risk, and credit default swaps are subject to the risks associated with the purchase and sale of credit protection.
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.
Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.
Hedging Risk
If the Fund uses a hedging instrument at the wrong time or judges the market conditions incorrectly, or the hedged instrument does not correlate to the risk sought to be hedged, the hedge might be unsuccessful, reduce the Fund's return, or create a loss. In addition, hedges, even when successful in mitigating risk, may not prevent the Fund from experiencing losses on its investments, and therefore the use of hedging strategies may reduce the Fund's return, or create a loss.
High Portfolio Turnover Risk
Portfolio turnover is a measure of the Fund's trading activity over a one-year 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 had a lower portfolio turnover rate.
High Yield Securities Risk
Exposure to 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 index-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 index-linked securities is expected to change in response to real interest rates. The price of an inflation index-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 will decline due to rising interest rates. Generally, the value of investments with interest rate risk, such as fixed income securities, will move in the opposite direction to movements in interest rates. The Federal Reserve has raised the federal funds rate several times since December 2015 and may continue to increase rates in the future. Interest rates may rise, perhaps significantly and/or rapidly, potentially resulting in substantial losses to the Fund. The prices of fixed income securities or derivatives are also affected by their duration. Fixed income securities or derivatives with longer durations generally have greater sensitivity to changes in interest rates. An increase in interest rates can impact markets broadly as well. Some investors buy securities and derivatives with borrowed money; an increase in interest rates can cause a decline in those markets.
Investment Risk
An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. When you sell your shares of the Fund, they could be worth less than what you paid for them. Therefore, you may lose money by investing in the Fund.
Issuer Risk
The value of, and/or the return generated by, a security may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer's goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets.
Leverage Risk
The Fund's use of derivative instruments 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. Leverage may result in losses that exceed the amount originally invested and may accelerate the rate of losses. Leverage tends to magnify, sometimes significantly, the effect of any increase or decrease in the Fund's exposure to an asset or class of assets and may cause the Fund's NAV per share 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 or impossible to purchase or sell at favorable times or prices. Market prices for such instruments may be volatile. 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, liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Unexpected redemptions may force the Fund 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
In recent periods, fixed income instruments have experienced unusual liquidity issues, increased price volatility and, in some cases, credit downgrades and increased likelihood of default. These events have reduced the willingness and ability of some lenders to extend credit, and have made it more difficult for some borrowers to obtain financing on attractive terms, if at all. In addition, global economies and financial markets are becoming increasingly interconnected, which increases the possibilities that conditions in one country or region might adversely impact issuers in a different country or region. A rise in protectionist trade policies, risks associated with the United Kingdom's vote to leave the European Union, the risk of a "trade war" between the United States and China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasi-governmental organizations.
In addition, political and governmental 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.
Model and Data Risk
The sub-advisor relies heavily on proprietary trading models ("Models") and both proprietary and third party provided data ("Data"), rather than granting trade-by-trade discretion to the sub-advisor's investment professionals. In combination, Models and Data are used to construct investment decisions, to value both current and potential investments, to provide risk management insights and to assist in hedging the Fund's positions and investments.
Models and Data are known to have errors, omissions, imperfections and malfunctions (collectively, "System Events").
The investment manager seeks to reduce the incidence and impact of System Events, to the extent feasible, through a combination of internal testing, simulation, real-time monitoring, use of independent safeguards in the overall portfolio management process and often in the software code itself.
Non-Diversification Risk
The Fund is non-diversified, which means it 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.
Obsolescence Risk
The Fund is unlikely to be successful in the deployment of its quantitative investment strategies unless the assumptions underlying the Models are realistic and either remain realistic and relevant in the future or are adjusted to account for changes in the overall market environment. If such assumptions are inaccurate or become inaccurate and are not promptly adjusted, it is likely that profitable trading signals will not be generated. If and to the extent that the Models do not reflect certain factors, and the sub-advisor does not successfully address such omission through its testing and evaluation and modify the Models accordingly, major losses may result — all of which will be borne by the Fund.
Other Investment Companies Risk
The Fund may invest in shares of other registered investment companies, including money market funds. To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund's direct fees and expenses and will be subject to the risks associated with investments in those companies. For example, money market funds are subject to interest rate risk, credit risk, and market risk.
Quantitative Strategy Risk
The success of the Fund's investment strategy may depend in part on the effectiveness of the sub-advisor's quantitative tools for screening securities. These strategies may incorporate factors that are not predictive of a security's value. Additionally, a previously successful strategy may become outdated or inaccurate, possibly resulting in losses.
Repurchase Agreement Risk
The use of repurchase agreements involves counterparty risk and credit risk. The obligations of a counterparty to a repurchase agreement are not guaranteed. The Fund permits various forms of securities as collateral whose values fluctuate and that are not issued or guaranteed by the U.S. Government. There are risks that a counterparty may default at a time when the collateral has declined in value, or a counterparty may become insolvent and subject to liquidation, which may affect the Fund's right to control the collateral.
Risk Management
Risk is an essential part of investing. No risk management program can eliminate the Fund's exposure to adverse events; at best, it can only reduce the possibility that the Fund will be affected by such events, and especially those risks that are not intrinsic to the Fund's investment program.
Segregated Assets Risk
In connection with certain transactions that may give rise to future payment obligations, including 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.
Sovereign and Quasi-Sovereign Debt Risk
Sovereign or quasi-sovereign debt securities 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 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 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.
Subsidiary Risk
By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary's investments. The derivatives and other investments held by the Subsidiary are generally similar to those that are permitted to be held by the Fund and are subject to the same risks that apply to similar investments if held directly by the Fund. These risks are described elsewhere in this Prospectus. There can be no assurance that the investment objective of the Fund or the Subsidiary will be achieved.
The Subsidiary is not registered under the Investment Company Act, and, unless otherwise noted in this Prospectus, is not subject to all the investor protections of the Investment Company Act. In addition, changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/or the Subsidiary to operate as described in this Prospectus and the SAI and could adversely affect the Fund's performance.
Tax Risk
To qualify as a "regulated investment company" under Subchapter M ("RIC"), the Fund must, among other requirements, derive at least 90% of its gross income for each taxable year from "qualifying income," which is described in more detail in the "Tax Information" section of the SAI. Income from certain commodity-linked derivative instruments in which the Fund invests is not considered qualifying income. The Fund will therefore restrict its income from direct investments in those instruments, such as commodity-linked swaps, to a maximum of 10% of its gross income for each taxable year. The Fund's investment in the Subsidiary is expected to provide the Fund with exposure to the commodities markets within the limitations of the federal tax requirements of Subchapter M.
The Internal Revenue Service ("IRS") issued a large number of private letter rulings ("PLRs") (which the Fund may not cite as precedent) from 2006 to 2011 that income a RIC derives from a wholly owned foreign subsidiary (a "controlled foreign corporation" or "CFC") (such as the Subsidiary) that earns income derived from commodity-linked derivative instruments is qualifying income. Treasury regulations published on March 19, 2019, provide that income inclusions of a RIC from a CFC are qualifying income for the RIC whether or not the CFC makes distributions to the RIC out of its associated earnings and profits for the applicable taxable year. See "Tax Information" in the SAI for further information regarding RIC's federal income tax treatment of income from CFCs and commodity-linked instruments. The federal income tax treatment of the Fund's commodity-linked investments and income from the Subsidiary may be materially adversely affected further by future legislation, other Treasury regulations, and/or guidance issued by the IRS that could affect whether income from such investments is qualifying income under Subchapter M or otherwise materially affect the character, timing or recognition, and/or amount of the Fund's taxable income and/or net capital gains and, therefore, the distributions the Fund makes.
Trading System and Execution of Orders Risk
The sub-advisor relies extensively on computer programs, systems, technology, Data and Models to implement its execution strategies and algorithms. The sub-advisor's investment strategies, trading strategies and algorithms depend on its ability to establish and maintain an overall market position in a combination of financial instruments selected by the sub-advisor. There is a risk that the sub-advisor's proprietary algorithmic trading systems may not be able to adequately react to a market event without serious disruption. Further, trading strategies and algorithms may malfunction causing severe losses. While the sub-advisor has employed tools to allow for human intervention to respond to significant system malfunctions, it cannot be guaranteed that losses will not occur in such circumstances as unforeseen market events and disruptions and execution system issues.
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''), the Federal Home Loan Mortgage Corporation (''Freddie Mac''), Federal Home Loan Bank ("FHLB"), Federal Farm Credit Bank ("FFCB"), and the Tennessee Valley Authority are not guaranteed by the U.S. Treasury and are not backed by the full faith and credit of the U.S. Government and no assurance can be given that the U.S. Government will provide financial support if these organizations do not have the funds to meet future payment obligations. U.S. Government securities and securities of government sponsored entities are also subject to credit risk, interest rate risk and market risk.
Valuation Risk
The Fund may value certain assets at a price different from the price at which they can be sold. This risk may be especially pronounced for investments that are illiquid or may become illiquid.
Volatility Risk
The Fund may have investments that appreciate or decrease significantly in value over short periods of time. This may cause the Fund's NAV to experience significant increases or declines in value over short periods of time.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk The Fund is non-diversified, which means it 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 objectives 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
Performance information for the Fund is not provided because the Fund has not been in operation for a full calendar year.
(American Beacon AHL TargetRisk 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% [10]
Management Fees rr_ManagementFeesOverAssets 0.90%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 1.28% [12]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [12]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.44%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.99%) [13]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.45%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 714
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 1,203
(American Beacon AHL TargetRisk 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%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 1.28% [12]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [12]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 3.19%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.99%) [13]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.20%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 323
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 891
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 223
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 $ 891
(American Beacon AHL TargetRisk 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%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 1.23% [12]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [12]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.14%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.99%) [13]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.15%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 117
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 574
(American Beacon AHL TargetRisk 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%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 1.13% [12]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [12]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.04%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.99%) [13]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.05%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 107
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 544
(American Beacon AHL TargetRisk 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%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 1.51% [12]
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [12]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.42%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.99%) [13]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.43%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 146
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 660
(American Beacon Ionic Strategic Arbitrage Fund℠)  
Prospectus: rr_ProspectusTable  
Objective [Heading] rr_ObjectiveHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Investment Objective </b></div>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund's investment objective is to seek capital appreciation with low volatility and reduced correlation to equities and interest rates.
Expense [Heading] rr_ExpenseHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fees and Expenses of the Fund </b></div>
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 22 of the Prospectus and "Additional Purchase and Sale Information for A Class Shares" on page 38 of the statement of additional information ("SAI"). With respect to purchases of shares through specific intermediaries, you may find additional information regarding sales charge discounts and waivers in Appendix A to the Fund's Prospectus entitled "Intermediary Sales Charge Discounts and Waivers". Although the Fund does not impose any sales charge on Y Class shares, you may pay a commission to your broker on your purchases and sales of those shares, which is not reflected in the tables or Example below.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Shareholder Fees (fees paid directly from your investment)</b></div>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) </b></div>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination April 30, 2020
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, Interest and Dividend Expenses on Securities Sold Short, the reduction of the contractual management fee, or the reduction of the contractual expense ratio caps.
Expense Example [Heading] rr_ExpenseExampleHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Example</b></div>
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 April 30, 2020. 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b>Assuming no redemption of shares:</b></div>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Portfolio Turnover </b></div>
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 556% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 556.00%
Strategy [Heading] rr_StrategyHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Investment Strategies </b></div>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund seeks to achieve its investment objective by implementing a strategic arbitrage strategy comprised of: convertible arbitrage, credit/rates relative value arbitrage, equity arbitrage and volatility arbitrage. The Fund seeks to employ a "market neutral," strategy, meaning that the Fund's returns are not intended to be closely correlated to the stock market as a whole, interest rates, or a particular market index. The allocation of the Fund's assets among its arbitrage strategies and the use of various hedging strategies are intended to enhance returns and mitigate downside risk.
The Fund will invest in a portfolio of instruments, including, but not limited to, convertible securities, common stock, preferred stock, American Depository Receipts ("ADRs"), exchange-traded funds ("ETFs"), exchange-traded notes ("ETNs"), closed-end funds, and derivative instruments, which may include, but are not limited to, equity options (including equity index options) and futures (including equity index futures and options thereon), currency forwards (generally for hedging purposes), warrants, credit default swaps, total return swaps, currency swaps, interest rate swaps, and mortgage derivatives (which may include, collateralized mortgage obligations ("CMOs"), mortgage-backed securities and stripped mortgage-backed securities, such as interest only ("IOs") and principal only ("POs") obligations). The Fund may invest in the securities and financial instruments of issuers of any market capitalization, securities issued pursuant to Rule 144A, as well as securities and financial instruments of foreign and emerging market issuers, which may be denominated in currencies other than the U.S. Dollar. The Fund may invest in debt securities of any credit quality or maturity, including high yield, below-investment grade debt securities (commonly referred to as "junk bonds").
The Fund's arbitrage strategies generally seek to exploit differences in the prices of, or the price relationships between, various types of securities. The Fund intends to allocate its assets among arbitrage investment strategies in the following manner:
  • 30-50% to Convertible Arbitrage. Convertible arbitrage generally seeks to capitalize on the pricing of a company's convertible securities relative to its common stock, typically by the purchase of convertible securities and short sales of the underlying common stock. It seeks to generate consistent returns and benefit from corporate events, or changes in volatility or credit assumptions.
  • 15-30% to Credit/Rates Relative Value Arbitrage. The Fund's credit/rates relative value arbitrage strategy seeks to invest in mortgage and other derivatives that the Fund considers to be inexpensive relative to key characteristics of such investments. For example, the Fund may identify a mortgage backed security that trades at a perceived discount to the implied pre-payment risk, which is the risk related to the early payment of principal. This strategy seeks to consistently produce income while actively managing duration risk (i.e., the price sensitivity to changes in interest rates). The credit/rates relative value arbitrage strategy also seeks to invest in closed-end funds that are trading at a discount to net asset value ("NAV"). By purchasing a closed-end fund trading at a discount to its NAV and shorting an ETF or another closed-end fund holding similar investments, the Fund will attempt to capture this discount. Investments in such closed-end funds have the potential for appreciation as the discount between a fund's price and its NAV narrows, and also can generate cash flow through periodic dividend payments.
  • 25-45% to Equity Arbitrage. The Fund's equity arbitrage strategy seeks to capture inefficiencies between the prices of an issuer's securities, such as, for example, prices of different classes of an issuer's equity securities, or between an issuer's warrants and common stock. This strategy also may seek to invest in the securities of companies involved, or potentially involved, in corporate events, such as mergers, tender offers, or other actions. A common example of such a type of investment is the attempt to capture the spread between the prices of the securities of companies involved in a tender offer by acquiring the securities of a target company in anticipation of their appreciation and selling short the acquirer's securities in anticipation of their depreciation. The Fund's equity arbitrage strategy can generally be expected to produce returns that fluctuate with company-specific events rather than changes in the broader market.
  • 5-25% to Volatility Arbitrage. The volatility arbitrage strategy seeks to capitalize on the movement of prices, regardless of direction. Volatility arbitrage involves both purchases and sales (writing) of options, futures and other derivatives as well as purchases and short selling of their underlying securities. This strategy seeks to generate a positive return during periods of significant declines in the broader markets in order to reduce the Fund's beta, which is its risk exposure to equity securities and interest rates.
The foregoing allocation targets are not fixed guidelines, and the sub-advisor will monitor and adjust the allocation of the Fund's assets among the four strategies from time to time based on a variety of factors, including qualitative assessments of market conditions, liquidity, targeted exposure levels, ability to implement appropriate hedges, and active risk management.
To implement its arbitrage strategies, the Fund will engage in short sales of securities and the use of options. When the Fund sells a security short, it borrows the security from a third party and sells it at the then current market price. The Fund is then obligated to buy the security on a later date so that it can return the security to the lender. The Fund intends to invest in derivative instruments for both hedging and investment purposes. The Fund may also use derivatives to increase its economic exposure to a particular security, currency or index in a cost effective manner, for example, by purchasing options on an ETF, rather than purchasing shares in the ETF itself, or by entering into a total return swap on an index, rather than buying the individual components of the index. The Fund generally will engage in active and frequent trading of portfolio securities to achieve its investment objective.
In response to adverse market, economic or other conditions, including the absence of attractive arbitrage opportunities, the Fund may temporarily invest a substantial portion of its assets in cash or cash equivalent securities. During such periods, the Fund may not achieve its investment objective.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Principal Risks </b></div>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
There is no assurance that the Fund will achieve its investment objectives and you could lose part or all of your investment in the Fund. The Fund is not designed for investors who need an assured level of current income and is intended to be a long-term investment. The Fund is not a complete investment program and may not be appropriate for all investors. Investors should carefully consider their own investment goals and risk tolerance before investing in the Fund. The principal risks of investing in the Fund, which are described in alphabetical order and not in order of importance or potential exposure, are:
Allocation and Correlation Risk
The Manager's and sub-advisor's judgments about, and allocations among arbitrage strategies, asset classes and market exposures may adversely affect the Fund's performance. There can be no assurance, particularly during periods of market disruption and stress, that the Fund will, in fact, experience a low level of correlation with a traditional portfolio of stocks and bonds or with the debt or equity markets generally. This risk may be increased by the use of derivatives to increase allocations to various market exposures.
Arbitrage Risk
The Fund may use a variety of arbitrage strategies in pursuing its investment strategy. The underlying relationships among securities and derivative instruments in which the Fund takes long and short positions may change in an adverse 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 be unexpectedly terminated.
Convertible Securities Risk
The value of a convertible security typically increases or decreases with the price of the underlying common stock. In general, a convertible security is subject to the risks of stocks when the underlying stock's price is high relative to the conversion price and is subject to the risks of debt securities when the underlying stock's price is low relative to the conversion price. Many convertible securities have credit ratings that are below investment grade and are subject to the same risks as an investment in below investment grade debt securities (commonly known as "junk bonds"). Convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible security's investment value. 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.Convertible securities are sensitive to movement in interest rates.
Counterparty Risk
The Fund is subject to the risk that a party or participant to a transaction, such as a broker or derivative counterparty, will be unwilling or unable to satisfy its obligation to make timely principal, interest or settlement payments or to otherwise honor its obligations to the Fund.
Credit Risk
The Fund is subject to the risk that the issuer or guarantor of an obligation, or the counterparty to a transaction, including a derivatives contract or a loan will fail to make timely payment of interest or principal or otherwise honor its obligations or default completely. Credit risk is typically greater for securities with ratings that are below investment grade (commonly referred to as "junk bonds"). Since the Fund can invest significantly in lower-quality debt securities considered speculative in nature, this risk will be substantial. A downgrade or default affecting any of the Fund's securities could affect the Fund's performance.
Currency Risk
The Fund may have exposure to foreign currencies by making 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 transactions. Foreign currencies will fluctuate, and may decline, in value relative to the U.S. dollar and other currencies and thereby affect the Fund's investments in foreign (non-U.S.) currencies or in securities that trade in, and receive revenues in, or in derivatives that provide exposure to, foreign (non-U.S.) currencies.
Cybersecurity and Operational Risk
The Fund and its service providers, and shareholders' ability to transact with the Fund, may be negatively impacted due to operational risks arising from, among other problems: human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service providers, to suffer data corruption or lose operational functionality. It is not possible for the Fund or its service providers to identify all of the operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. Most issuers in which the Fund invests are heavily dependent on computers for data storage and operations, and require ready access to the internet to conduct their business. Thus, cybersecurity incidents could also affect issuers of securities in which the Fund invests, leading to significant loss of value.
Derivatives Risk
Derivatives may involve significant risk. The use of derivative instruments may expose the Fund to additional risks that it would not be subject to if it invested directly in the securities underlying those derivatives, including the high degree of leverage often embedded in such instruments, and potential material and prolonged deviations between the theoretical value and realizable value of a derivative. Some derivatives have the potential for unlimited loss, regardless of the size of the Fund's initial investment. Derivatives may be illiquid and may be more volatile than other types of investments. The Fund may buy or sell derivatives not traded on an exchange and which may be subject to heightened liquidity and valuation risk. Derivative investments can increase portfolio turnover and transaction costs. Derivatives also are subject to counterparty risk and credit risk. As a result, the Fund may obtain no recovery of its investment or may only obtain a limited recovery, and any recovery may be delayed. Not all derivative transactions require a counterparty to post collateral, which may expose the Fund to greater losses in the event of a default by a counterparty. Ongoing changes to regulation of the derivatives market 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 non-deliverable forwards ("NDFs"), are derivative instruments pursuant to a contract where the parties agree to a fixed price for an agreed amount of securities or other underlying assets at an agreed date or to buy or sell a specific currency, at a future date at a price set at the time of the contract. There may be an imperfect correlation between the movement in prices of the 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 and forward currency contracts, 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. Equity index futures contracts expose the Fund to volatility in an underlying securities index.
  • 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 any 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 any 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. 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, there is a risk that the Fund may be required to sell the underlying asset at a disadvantageous price. If the Fund sells a call option on an underlying asset that 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 the Fund will not be able to realize any of the value of the underlying asset above the call price.
  • 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 leverage 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 may be also difficult to value, and swaps that are traded over-the-counter are not subject to standardized clearing requirements and may involve greater counterparty, credit and liquidity risk. In addition, interest rate swaps are subject to interest rate risk, total return swaps are subject to market risk and interest rate risk if the underlying securities are bonds or other debt obligations, currency swaps are subject to currency risk, and credit default swaps are subject to the risks associated with the purchase and sale of credit protection.
  • 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, convertible securities, depositary receipts and preferred stocks. 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 sensitive to movement 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 security's investment value.
  • Depositary Receipts. Depositary receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges are subject to certain of the risks associated with investing directly in foreign securities, including, but not limited to, currency exchange rate fluctuations, political and financial instability in the home country of a particular depositary receipt or foreign stock, less liquidity and more volatility, less government regulation and supervision and delays in transaction settlement.
  • Preferred Stocks. 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.
Exchange-Traded Notes Risk
ETNs are unsecured, unsubordinated debt securities. Unlike most debt securities, issuers of ETNs are generally required to repay the note only upon maturity, and therefore the holder of a typical ETN does not receive periodic interest payments. An investment in an ETN exposes the Fund to the risk that the ETN's issuer may be unable to repay the note upon maturity. In addition, payments made to the holder of an ETN upon the maturity or redemption of the note are subject to fees, which may reduce the amount received to less than the principal amount invested.
Foreign Investing Risk
Non-U.S. investments carry potential risks not associated with U.S. investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity, (4) lack of uniform accounting, auditing and financial reporting standards, (5) increased volatility, (6) different government regulation and supervision of foreign stock exchanges, brokers and listed companies, and (7) delays in transaction settlement in some foreign markets.
Hedging Risk
If the Fund uses a hedging instrument at the wrong time or judges the market conditions incorrectly, or the hedged instrument does not correlate to the risk sought to be hedged, the hedge might be unsuccessful, reduce the Fund's return, or create a loss. In addition, hedges, even when successful in mitigating risk, may not prevent the Fund from experiencing losses on its investments, and therefore the use of hedging strategies may reduce the Fund's return, or create a loss.
High 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 had a lower portfolio turnover rate.
High Yield Securities Risk
Exposure to 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.
Illiquid and Restricted Securities Risk
Securities not registered in the U.S. under the Securities Act of 1933, as amended (the "Securities Act") or in non-U.S. markets pursuant to similar regulations, including Rule 144A securities, are restricted as to their resale. Such securities may not be listed on an exchange and may have no active trading market. They may be more difficult to purchase or sell at an advantageous time or price because such securities may not be readily marketable in broad public markets, or may have to be held for a certain time period before they can be resold. The Fund may not be able to sell a restricted security when the sub-advisor 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.
Interest Rate Risk
The Fund is subject to the risk that the market value of securities or derivatives it holds, particularly mortgage backed securities, will decline due to rising interest rates. Generally, the value of investments with interest rate risk, such as fixed income securities, will move in the opposite direction to movements in interest rates. The Federal Reserve has raised the federal funds rate several times since December 2015 and may continue to increase rates in the future. Interest rates may rise, perhaps significantly and/or rapidly, potentially resulting in substantial losses to the Fund. The prices of fixed income securities or derivatives are also affected by their duration. Fixed income securities or derivatives with longer durations generally have greater sensitivity to changes in interest rates. For example, if a bond has a duration of four years, a 1% increase in interest rates could be expected to result in a 4% decrease in the value of the bond. An increase in interest rates can impact markets broadly as well. Some investors buy securities and derivatives with borrowed money; an increase in interest rates can cause a decline in those markets.
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 the high growth rates of successful smaller companies, especially during periods of economic expansion.
Leverage Risk
The Fund's use of 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. Leverage may result in losses that exceed the amount originally invested and may accelerate the rate of losses. Leverage tends to magnify, sometimes significantly, the effect of any increase or decrease in the Fund's exposure to an asset or class of assets and may cause the Fund's 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 or impossible to purchase or sell at favorable times or prices. Market prices for such instruments may be volatile. 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, liquidity risk may be magnified in rising interest rate environments due to higher than normal redemption rates. Unexpected redemptions may force the Fund 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
In recent periods, fixed income instruments have experienced unusual liquidity issues, increased price volatility and, in some cases, credit downgrades and increased likelihood of default. These events have reduced the willingness and ability of some lenders to extend credit, and have made it more difficult for some borrowers to obtain financing on attractive terms, if at all. In addition, global economies and financial markets are becoming increasingly interconnected, which increases the possibilities that conditions in one country or region might adversely impact issuers in a different country or region. A rise in protectionist trade policies, risks associated with the United Kingdom's vote to leave the European Union, the risk of a "trade war" between the United States and China, and the possibility of changes to some international trade agreements, could affect the economies of many nations, including the United States, in ways that cannot necessarily be foreseen at the present time. The severity or duration of adverse economic conditions may also be affected by policy changes made by governments or quasi-governmental organizations.
In addition, political and governmental 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.
Model and Data Risk
Models and data are used to screen potential investments for the Fund. When models or data prove to be incorrect or incomplete, any decisions made in reliance thereon expose the Fund to potential risks. Some of the models used by the sub-advisor are predictive in nature. The use of predictive models has inherent risks. Because predictive models are usually constructed based on historical data supplied by third parties, the success of relying on such models may depend heavily on the accuracy and reliability of the supplied historical data.
Mortgage Backed and Mortgage Related Securities Risk
Investments in mortgage backed and mortgage related securities are subject to market risks for fixed-income securities which include, but are not limited to, interest rate risk, credit risk, extension risk and prepayment risk. Moreover, declines in the credit quality of the issuers of mortgage 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.
  • CMO Risk. CMOs may offer a higher yield than U.S. government securities, but they may also be subject to greater price fluctuation and credit risk. In addition, CMOs typically will be issued in a variety of classes or series, which have different maturities and are retired in sequence. In the event of a default by an issuer of a CMO, there is no assurance that the collateral securing such CMO will be sufficient to pay principal and interest. It is possible that there will be limited opportunities for trading CMOs in the OTC market, the depth and liquidity of which will vary from time to time.
  • Stripped Mortgage-Backed Securities Risk. Generally, there are two classes of stripped mortgage-backed securities: Interest Only (IO) and Principal Only (PO). The cash flows and yields on IOs and POs are extremely sensitive to the rate of principal payments (including prepayments) on the underlying mortgage loans or mortgage-backed securities. A rapid rate of principal payments may adversely affect the yield to maturity of IOs. A slow rate of principal payments may adversely affect the yield to maturity of POs. If prepayments of principal are greater than anticipated, an investor in IOs may incur substantial losses. If prepayments of principal are slower than anticipated, the yield on a PO will be affected more severely than would be the case with a traditional mortgage-backed security.
Non-Diversification Risk
The Fund is non-diversified, which means it 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 closed-end funds and exchange-traded funds ("ETFs"). To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund's direct fees and expenses and will be subject to the risks associated with investments in those companies. For example, 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 and closed-end funds 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. The lack of an active trading market or the halting of trading in the shares of ETFs or closed-end funds in which the Fund invests may result in losses to the Fund.
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. Because the majority of the Fund's investments subject to prepayment risk generally will be mortgage-backed securities consisting of interest-only securities the Fund may experience losses if a significant amount of bonds linked to the Fund's investments are prepaid. The Fund may have to invest at a lower rate, may not benefit from an increase in value that may result from declining interest rates, and may lose any premium it paid to acquire the security. Variable and floating rate securities may be less sensitive to prepayment risk. Extension risk is the risk that a decrease in prepayments may, as a result of higher interest rates or other factors, result in the extension of a security's effective maturity, heighten interest rate risk and increase the potential for a decline in its price.
Quantitative Strategy Risk
The success of the Fund's investment strategy may depend in part on the effectiveness of the sub-advisor's quantitative tools for screening securities. These strategies may incorporate factors that are not predictive of a security's value. Additionally, a previously successful strategy may become outdated or inaccurate, possibly resulting in losses.
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.
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 narrower commercial markets and more limited operating history, product lines, and managerial and financial resources than larger, more established companies, the securities of these companies may lack sufficient market liquidity, and they can be particularly sensitive to expected changes in interest rates, borrowing costs and earnings. In general, these risks are greater for small-capitalization companies than for mid-capitalization companies.
Tax Risk
To qualify as a "regulated investment company" under the Internal Revenue Code of 1986, as amended (the "Internal Revenue Code") ("RIC"), the Fund must meet a "qualifying income" test each taxable year. Certain aspects of the tax treatment of derivative instruments, including certain equity index options and futures, are currently unclear and may be affected by future legislation, Treasury regulations and/or guidance issued by the Internal Revenue Service ("IRS") that could affect the treatment of income from these instruments and the character, timing/recognition and amount of the Fund's taxable income and/or net capital gains and, therefore, the distributions it makes.
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 may become illiquid.
Risk Nondiversified Status [Text] rr_RiskNondiversifiedStatus Non-Diversification Risk The Fund is non-diversified, which means it 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 objectives 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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"><b> Fund Performance </b></div>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and table below provide an indication of risk by showing changes in the Fund's and, prior to June 30, 2015, the Fund's predecessor's, performance over time. The bar chart shows how the Fund's performance has varied from year to year. The table shows how the Fund's performance compares to a broad measure of market performance, the ICE BofAML U.S. Dollar LIBOR 3-Month Constant Maturity Index.
Simultaneous with the commencement of the Fund's investment operations on June 30, 2015, the Ionic Absolute Return Fund LLC ("Private Fund"), a privately offered investment fund managed by the Fund's sub-advisor, transferred its assets to the Institutional Class shares of the Fund. The Fund's investment policies, objective, guidelines and restrictions are, in all material respects, equivalent to those of the Private Fund. Except for the seed capital provided by the Manager, the Fund's portfolio of investments on June 30, 2015 were the same as the portfolio of investments of the Private Fund immediately prior to the transfer. The Trust has calculated the performance for each share class of the Fund for periods commencing prior to the transfer of the Private Fund's assets to the Fund by including the Private Fund's total return adjusted to reflect the deduction of the Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement applicable to each share class as stated in the fee table included in the Fund's initial prospectus. These fees and expenses include sales charges and Rule 12b-1 fees to the extent applicable. The Private Fund was not registered under the Investment Company Act of 1940, as amended ("Investment Company Act") and was not subject to certain investment limitations, diversification requirements, and other restrictions imposed by the Investment Company Act and the Internal Revenue Code, which, if applicable, may have adversely affected its performance.
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 <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Calendar year total returns for Institutional Class Shares. Year Ended 12/31 </b></div>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Highest Quarterly Return:
1.65% 1st Quarter 2015
1/1/2014 through 12/31/2018
Lowest Quarterly Return:
-2.52% 4th Quarter 2018
1/1/2014 through 12/31/2018
Performance Table Heading rr_PerformanceTableHeading <div style="font-size:10pt;padding-top:5pt;padding-bottom:0;padding-left:0;"> <b>Average annual total returns for periods ended December 31, 2018</b></div>
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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation. After-tax returns are shown only for the Fund's Institutional Class shares; after-tax returns for other share classes will vary.
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 are a tax-exempt entity or hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account ("IRA") or a 401(k) plan, the after-tax returns do not apply to your situation.
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 changes in the Fund's and, prior to June 30, 2015, the Fund's predecessor's, performance over time. The bar chart shows how the Fund's performance has varied from year to year. The table shows how the Fund's performance compares to a broad measure of market performance, the ICE BofAML U.S. Dollar LIBOR 3-Month Constant Maturity Index.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for the Fund's Institutional Class shares; after-tax returns for other share classes will vary.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.americanbeaconfunds.com
(American Beacon Ionic Strategic Arbitrage Fund℠) | ICE BofAML U.S. Dollar LIBOR 3-Month Constant Maturity Index (Reflects no deduction for fees, expenses or taxes)  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 2.08%
5 Years rr_AverageAnnualReturnYear05 0.86%
Since Inception rr_AverageAnnualReturnSinceInception 0.82%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Sep. 01, 2013
(American Beacon Ionic Strategic Arbitrage 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% [14]
Management Fees rr_ManagementFeesOverAssets 1.15% [15]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 1.19%
Interest and Dividend Expenses on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.70%
Remaining Other Expenses (including service fees) rr_Component2OtherExpensesOverAssets 0.49%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.34%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.93% [16]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.15%) [17]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.78% [15]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 743
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,325
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,932
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 3,562
1 Year rr_AverageAnnualReturnYear01 (8.74%)
Since Inception rr_AverageAnnualReturnSinceInception 0.02%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jun. 30, 2015
(American Beacon Ionic Strategic Arbitrage 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 1.15% [15]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 1.29%
Interest and Dividend Expenses on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.74%
Remaining Other Expenses (including service fees) rr_Component2OtherExpensesOverAssets 0.55%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.34%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 3.78% [16]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.21%) [17]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 3.57% [15]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 460
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,136
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,931
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 4,006
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 360
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 1,136
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,931
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 4,006
1 Year rr_AverageAnnualReturnYear01 (5.84%)
Since Inception rr_AverageAnnualReturnSinceInception 0.44%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jun. 30, 2015
(American Beacon Ionic Strategic Arbitrage 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 1.15% [15]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 1.20%
Interest and Dividend Expenses on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.70%
Remaining Other Expenses (including service fees) rr_Component2OtherExpensesOverAssets 0.50%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.34%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.69% [16]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.21%) [17]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.48% [15]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 251
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 815
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,406
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 3,007
1 Year rr_AverageAnnualReturnYear01 (3.94%)
Since Inception rr_AverageAnnualReturnSinceInception 1.13%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jun. 30, 2015
(American Beacon Ionic Strategic Arbitrage 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 1.15% [15]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 1.14%
Interest and Dividend Expenses on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.68%
Remaining Other Expenses (including service fees) rr_Component2OtherExpensesOverAssets 0.46%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.34%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.63% [16]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.27%) [17]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.36% [15]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 239
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 792
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,371
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 2,944
Annual Return 2015 rr_AnnualReturn2015 4.60%
Annual Return 2016 rr_AnnualReturn2016 1.28%
Annual Return 2017 rr_AnnualReturn2017 (0.04%)
Annual Return 2018 rr_AnnualReturn2018 (3.80%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: 1.65% 1st Quarter 2015 1/1/2014 through 12/31/2018
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 1.65%
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2015
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: -2.52% 4th Quarter 2018 1/1/2014 through 12/31/2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (2.52%)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
1 Year rr_AverageAnnualReturnYear01 (3.80%)
5 Years rr_AverageAnnualReturnYear05 1.00%
Since Inception rr_AverageAnnualReturnSinceInception 1.19%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Sep. 01, 2013
(American Beacon Ionic Strategic Arbitrage Fund℠) | Institutional Class | Returns After Taxes on Distributions  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (6.95%)
5 Years rr_AverageAnnualReturnYear05 (1.22%)
Since Inception rr_AverageAnnualReturnSinceInception (0.91%)
Inception Date of Class rr_AverageAnnualReturnInceptionDate Sep. 01, 2013
(American Beacon Ionic Strategic Arbitrage Fund℠) | Institutional Class | Returns After Taxes on Distributions and Sales of Fund Shares  
Prospectus: rr_ProspectusTable  
1 Year rr_AverageAnnualReturnYear01 (1.92%)
5 Years rr_AverageAnnualReturnYear05 (0.05%)
Since Inception rr_AverageAnnualReturnSinceInception 0.14%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Sep. 01, 2013
(American Beacon Ionic Strategic Arbitrage 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 1.15% [15]
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 1.88%
Interest and Dividend Expenses on Securities Sold Short rr_Component1OtherExpensesOverAssets 0.69%
Remaining Other Expenses (including service fees) rr_Component2OtherExpensesOverAssets 1.19%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.34%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 3.37% [16]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.62%) [17]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.75% [15]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 278
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 979
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,702
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 3,616
1 Year rr_AverageAnnualReturnYear01 (4.17%)
Since Inception rr_AverageAnnualReturnSinceInception 0.95%
Inception Date of Class rr_AverageAnnualReturnInceptionDate Jun. 30, 2015
[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] 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 April 30, 2020 to the extent that Total Annual Fund Operating Expenses exceed 1.38% for the A Class, 2.13% for the C Class, 1.08% for the Y Class, 0.98% for the Institutional Class and 1.36% 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 or terminated 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.
[3] American Beacon Advisors, Inc. (the "Manager") has contractually agreed to waive fees and/or reimburse expenses of the Fund's A Class, Y Class, R6 Class, Institutional Class and Investor Class shares, as applicable, through April 30, 2020 to the extent that Total Annual Fund Operating Expenses exceed 1.21% for the A Class, 0.91% for the Y Class, 0.76% for the R6 Class, 0.81% for the Institutional Class and 1.19% 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 or terminated 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 December 31, 2018, 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 C Class shares
[4] Management fees have been restated to reflect a reduction in the contractual management fee rate that became effective on July 1, 2018.
[5] Due to the restatement of management fees, the Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets provided in the Financial Highlights table.
[6] 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, R6 Class, Institutional Class and Investor Class shares, as applicable, through April 30, 2020 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, 0.84% for the R6 Class, 0.89% for the Institutional Class and 1.25% 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 or terminated 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.
[7] Other Expenses for R6 Class shares are based on estimated expenses for the current fiscal year.
[8] American Beacon Advisors, Inc. (the "Manager") has contractually agreed to waive fees and/or reimburse expenses of the Fund's R6 Class through April 30, 2020 to the extent that Total Annual Fund Operating Expenses exceed 1.05% for the R6 Class shares (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 or terminated 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.
[9] Other Expenses for R6 Class shares are based on estimated expenses for the current fiscal year.
[10] 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.
[11] 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 April 30, 2020 to the extent that Total Annual Fund Operating Expenses exceed 1.94% for the A Class, 2.69% for the C Class, 1.64% for the Y Class, 1.54% for the Institutional Class and 1.92% 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 or terminated 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.
[12] Other Expenses and Acquired Fund Fees and Expenses are based on estimated expenses for the current fiscal year.
[13] 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 April 30, 2020 to the extent that Total Annual Fund Operating Expenses exceed 1.44% for the A Class, 2.19% for the C Class, 1.14% for the Y Class, 1.04% for the Institutional Class and 1.42% 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 or terminated 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.
[14] 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.
[15] Effective December 1, 2018, the sub-advisor lowered its advisory fee and the Manager agreed to lower the contractual expense ratio caps for all classes of the Fund. The management fee and Total Annual Fund Operating Expenses after fee waiver and/or expense reimbursement have been restated to reflect a reduction in the contractual management fee and contractual expense ratio caps.
[16] 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, Interest and Dividend Expenses on Securities Sold Short, the reduction of the contractual management fee, or the reduction of the contractual expense ratio caps.
[17] 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 April 30, 2020 to the extent that Total Annual Fund Operating Expenses exceed 1.74% for the A Class, 2.49% for the C Class, 1.44% for the Y Class, 1.34% for the Institutional Class and 1.72% 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 or terminated 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.