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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading American Beacon Bridgeway Large Cap Value Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
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 Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales discounts if you and your eligible family members invest, or agree to invest in the future, at least $50,000 in the A Class shares of the American Beacon Funds. More information about these and other discounts is available from your financial professional and on page 13  under “Choosing Your Share Class” in the prospectus and on page 29 under “Additional Purchase and Sale Information for A Class Shares” in the statement of additional information.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 2014-04-30
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 36% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 36.00%
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 the A Class shares of the American Beacon Funds. More information about these and other discounts is available from your financial professional and on page 13 under "Choosing Your Share Class" in the prospectus and on page 29 under "Additional Purchase and Sale Information for A Class Shares" in the statement of additional information.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Share Class
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption Assuming no redemption of shares:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund invests in a diversified portfolio of large stocks that are listed on the New York Stock Exchange, the American Stock Exchange, and 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 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 June 30, 2012, the market capitalizations of the companies in the Russell 1000® Index ranged from $1.2 billion to $546.1 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 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. The decision to sell a stock is usually made based on the relative attractiveness of new statistical model recommendations, deteriorating financial strength of a company, portfolio risk considerations, and corporate actions or other external factors that may drive a stock’s future price movements.

The Fund may invest cash balances in other investment companies including money market funds, and may purchase and sell futures contracts to gain market exposure on cash balances or reduce market exposure in anticipation of liquidity needs.

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.

The income objective of the Fund, which is a secondary objective, 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 Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
There is no assurance that the Fund will achieve its investment objective and you could lose part or all of your investment in the Fund. The Fund is not designed for investors who need an assured level of income and is intended to be a long-term investment. The Fund is not a complete investment program and may not be appropriate for all investors. Investors should carefully consider their own investment goals and risk tolerance before investing in the Fund. The principal risks of investing in the Fund are:

Capital Gains Risk

If the Fund experiences extensive redemptions, the sub-advisor might need to sell some stocks, which could create capital gains. There can be no guarantee that the Fund may not someday distribute substantial capital gains, although the sub-advisor strongly intends to avoid them.

Equity Investments Risk

Equity securities generally are subject to market risk. The Fund’s investments in equity securities may include common stocks, preferred stocks, securities convertible into common stocks, real estate investment trusts (“REITs”), American Depositary Receipts (“ADRs”) and U.S. dollar-denominated foreign stocks traded on U.S. exchanges. Such investments may expose the Fund to additional risks.

Common stock generally is subordinate to preferred stock upon the liquidation or bankruptcy of the issuing company. Preferred stocks and convertible securities are sensitive to movements in interest rates. In addition, convertible securities are subject to the risk that the credit standing of the issuer may have an effect on the convertible securities’ investment value. Investments in ADRs 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. 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.

Foreign Exposure Risk

The Fund may invest in securities issued by foreign companies through ADRs and U.S. dollar-denominated foreign stocks trading on U.S. exchanges. These securities are subject to many of the risks inherent in investing in foreign securities, including, but not limited to, currency fluctuations and political and financial instability in the home country of a particular ADR or foreign stock.

Futures Contract Risk

Futures contracts are a type of derivative investment.  A derivative refers to any financial instrument whose value is derived, at least in part, from the price of another security or a specified index, asset or rate. The use of derivatives presents risks different from, and possibly greater than, the risks associated with investing directly in traditional securities. Gains or losses in a derivative may be magnified and may be much greater than the derivatives original cost.

There may be an imperfect correlation between the changes in market value of the securities held by the Fund and the prices of futures contracts.  There may not be a liquid secondary market for the futures contract.  When the Fund purchases or sells a futures contract, it is subject to daily variation margin calls that could be substantial in the event of adverse price movements.  If the Fund has insufficient cash to meet daily variation margin requirements, it might need to sell securities at a time when such sales are disadvantageous.

Investment Risk

An investment in the Fund is not a deposit of 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 a security may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets.

Large-Capitalization Companies Risk

The securities of large market capitalization companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

Market Events

Turbulence in financial markets and reduced liquidity in equity, credit and fixed-income markets may negatively affect many issuers worldwide which may have an adverse effect on the Fund.

Market Risk

Since this Fund invests most of its assets in stocks, it is subject to stock market risk. Market risk involves the possibility that the value of the Fund’s investments in stocks will vary from day to day in response to the activities of individual companies, as well as general market, regulatory, political and economic conditions. From time to time, certain investments held by the Fund may have limited marketability and may be difficult to sell at favorable times or prices. If the Fund is forced to sell such holdings to meet redemption requests or other cash needs, the Fund may have to sell them at a loss.

Other Investment Companies Risk

The Fund may invest in shares of other registered investment companies, including open-end funds, closed-end funds, business development companies, exchange-traded funds (“ETFs”) and money market funds. To the extent that the Fund invests in shares of other registered investment companies, you will indirectly bear fees and expenses charged by the underlying funds in addition to the Fund’s direct fees and expenses and will be subject to the risks associated with investments in those funds.

Securities Selection Risk

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

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 go down. A value approach could also result in fewer securities that increase rapidly during times of market gains. Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment. The Fund’s value style 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 of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Fund Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and table below provide an indication of risk by showing how the Fund’s performance has varied from year to year. The table shows how the Fund’s performance compares to the Russell 1000® Value Index, which is the Fund’s primary benchmark and is a broad measure of market performance. The Lipper Large-Cap Value Funds Index shows how the Fund’s performance compares to a composite of mutual funds with similar investment objectives.

The chart and the table below show the performance of the Fund’s Institutional Class shares for all periods. 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 information of A Class, C Class, Y Class and Investor Class shares of the Fund is not provided because the Fund did not commence operations of these classes until February 3, 2012. You may obtain updated performance information on the Fund’s website at www.americanbeaconfunds.com. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
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.
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex The table shows how the Fund's performance compares to the Russell 1000 Value Index, which is the Fund's primary benchmark and is a broad measure of market performance. The Lipper Large-Cap Value Funds Index shows how the Fund's performance compares to a composite of mutual funds with similar investment objectives.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.americanbeaconfunds.com
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.
Bar Chart [Heading] rr_BarChartHeading Calendar year total returns for Institutional Class shares
Bar Chart Narrative [Text Block] rr_BarChartNarrativeTextBlock
Year-By-Year Percentage Returns as of 12/31 of Each Year
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
The calendar year-to-date total return as of June 30, 2012 was 8.27%.

   
Highest Quarterly Return:
17.15%
(1/1/04 through 12/31/11)
(3rd Quarter 2009)
Lowest Quarterly Return:
-18.26%
(1/1/04 through 12/31/11)
(4th Quarter 2008)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return: (1/1/04 through 12/31/11)
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 17.15%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return: (1/1/04 through 12/31/11)
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (18.26%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns For the periods ended December 31, 2011
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
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 taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred If you hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account or a 401(k), the after-tax returns do not apply to your situation.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Institutional Class shares; after-tax returns for other share classes will vary.
Russell 1000® Value Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 0.39% [1]
5 Years rr_AverageAnnualReturnYear05 (2.64%) [1]
Since Inception rr_AverageAnnualReturnSinceInception 4.52% [1]
Lipper Large-Cap Value Funds Index
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (2.17%) [1]
5 Years rr_AverageAnnualReturnYear05 (2.26%) [1]
Since Inception rr_AverageAnnualReturnSinceInception 3.73% [1]
A Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.45%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.96% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 1.66%
Expense reduction and reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.32%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 1.34% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 704
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 1,039
Annual Return 2004 rr_AnnualReturn2004 15.15%
Annual Return 2005 rr_AnnualReturn2005 11.62%
Annual Return 2006 rr_AnnualReturn2006 18.52%
Annual Return 2007 rr_AnnualReturn2007 4.49%
Annual Return 2008 rr_AnnualReturn2008 (36.83%)
Annual Return 2009 rr_AnnualReturn2009 24.92%
Annual Return 2010 rr_AnnualReturn2010 14.51%
Annual Return 2011 rr_AnnualReturn2011 2.12%
1 Year rr_AverageAnnualReturnYear01 2.33% [1]
5 Years rr_AverageAnnualReturnYear05 (0.69%) [1]
Since Inception rr_AverageAnnualReturnSinceInception 5.77% [1]
A Class | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 2.12% [1]
5 Years rr_AverageAnnualReturnYear05 (1.03%) [1]
Since Inception rr_AverageAnnualReturnSinceInception 5.41% [1]
A Class | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.77% [1]
5 Years rr_AverageAnnualReturnYear05 (0.61%) [1]
Since Inception rr_AverageAnnualReturnSinceInception 4.94% [1]
C Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management fees rr_ManagementFeesOverAssets 0.45%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.96% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 2.41%
Expense reduction and reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.32%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 2.09% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 312
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 721
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 212
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 721
Y Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.45%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.81% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 1.26%
Expense reduction and reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.32%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 0.94% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 96
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 369
Institutional Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.45%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.71% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 1.16%
Expense reduction and reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.32%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 0.84% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 86
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 337
Inception Date rr_AverageAnnualReturnInceptionDate Oct. 31, 2003
Investor Class
  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge load (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.45%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 1.09% [2]
Total annual fund operating expenses rr_ExpensesOverAssets 1.54%
Expense reduction and reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.32%)
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 1.22% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 124
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 455
[1] After-tax returns are shown only for Institutional Class shares; after-tax returns for other share classes will vary. 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 taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. If you hold your Fund shares through a tax-deferred arrangement, such as an individual retirement account or a 401(k), the after-tax returns do not apply to your situation.
[2] Expenses are based on estimated expenses.
[3] The Manager has contractually agreed to reduce and/or reimburse the A Class, C Class, Y Class, Institutional Class and Investor Class of the Fund for Other Expenses through April 30, 2014, to the extent that Total Annual Fund Operating Expenses for the Fund exceed 1.34%, 2.09%, 0.94%, 0.84% and 1.22% for the A Class, C Class, Y Class, Institutional Class and Investor Class, respectively (excluding taxes, brokerage commissions, acquired fund fees and expenses and other extraordinary expenses such as litigation). The contractual expense arrangement can be changed by approval of a majority of the Fund's Board of Trustees. The Manager can be reimbursed by the Fund for any contractual or voluntary fee reductions or expense reimbursements if reimbursement to the Manager (a) occurs within three years after the Manager's own reduction or reimbursement and (b) does not cause the Total Annual Fund Operating Expenses of a class to exceed the percentage limit contractually agreed.