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Shareholder Fees (fees paid directly from your investment) Example 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 you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. 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 __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. 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class2falseRowprimaryElement*5false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.00200.0020falsefalsefalsetruefalse2truetruetrue0.00200.0020falsefalsefalsetruefalse3truetruetrue0.00200.0020falsefalsefalsetruefalse4truetruetrue0.00200.0020falsefalsefalsetruefalse5truetruetrue0.00200.0020falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalseManagement fees0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00200.0020falsefalsefalsetruefalse2truetruetrue0.00200.0020falsefalsefalsetruefalse3truetruetrue0.00200.0020falsefalsefalsetruefalse4truetruetrue0.00200.0020falsefalsefalsetruefalse5truetruetrue0.00200.0020falsefalsefalsetruefalseOthernanafalsefalseManagement fees3falseRowprimaryElement*6false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalseDistribution and/or service (12b-1) fees0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalseDistribution and/or service (12b-1) fees4falseRowprimaryElement*7false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.00570.0057falsefalsefalsetruefalse2truetruetrue0.00850.0085falsefalsefalsetruefalse3truetruetrue0.00150.0015falsefalsefalsetruefalse4truetruetrue0.00450.0045falsefalsefalsetruefalse5truetruetrue0.00660.0066falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalseOther expenses0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00570.0057falsefalsefalsetruefalse2truetruetrue0.00850.0085falsefalsefalsetruefalse3truetruetrue0.00150.0015falsefalsefalsetruefalse4truetruetrue0.00450.0045falsefalsefalsetruefalse5truetruetrue0.00660.0066falsefalsefalsetruefalseOthernanafalsefalseOther expenses5falseRowprimaryElement*8false0rr_AcquiredFundFeesAndExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.00010.0001falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table truefalseAcquired Fund Fees and Expenses0rr_AcquiredFundFeesAndExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.00010.0001falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalse5truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalseAcquired Fund Fees and Expenses6falseRowprimaryElement*9false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.01020.0102[3]falsefalsefalsetruefalse2truetruetrue0.02050.0205[3]falsefalsefalsetruefalse3truetruetrue0.00350.0035[3]falsefalsefalsetruefalse4truetruetrue0.00650.0065[3]falsefalsefalsetruefalse5truetruetrue0.00860.0086[3]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions truefalseTotal annual fund operating expenses0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue0.01020.0102falsefalsefalsetruefalse2truetruetrue0.02050.0205falsefalsefalsetruefalse3truetruetrue0.00350.0035falsefalsefalsetruefalse4truetruetrue0.00650.0065falsefalsefalsetruefalse5truetruetrue0.00860.0086falsefalsefalsetruefalseOthernanafalsefalseTotal annual fund operating expenses7falseRowprimaryElement*10false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegatedtotal1truetruetrue0.00170.0017[1]falsefalsefalsetruefalse2truetruetrue0.00450.0045falsefalsefalsetruefalse3falsetruetrue00falsefalsefalsetruefalse4truetruetrue0.00010.0001falsefalsefalsetruefalse5truetruetrue0.00070.0007[1]falsefalsefalsetruefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table truefalseExpense Waiver and Reimbursement0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00170.0017[2]falsefalsefalsetruefalse2truetruetrue0.00450.0045falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.00010.0001falsefalsefalsetruefalse5truetruetrue0.00070.0007[2]falsefalsefalsetruefalseOthernanafalsefalseExpense Waiver and Reimbursement8falseRowprimaryElement*11false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruetrue0.00850.0085[1],[2]falsefalsefalsetruefalse2truetruetrue0.01600.0160[2]falsefalsefalsetruefalse3falsetruetrue00falsefalsefalsetruefalse4truetruetrue0.00640.0064[2]falsefalsefalsetruefalse5truetruetrue0.00790.0079[1],[2]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table truefalseTotal annual fund operating expenses after expense waiver and reimbursement0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[3]1truetruetrue0.00850.0085[2]falsefalsefalsetruefalse2truetruetrue0.01600.0160falsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4truetruetrue0.00640.0064falsefalsefalsetruefalse5truetruetrue0.00790.0079[2]falsefalsefalsetruefalseOthernanafalsefalseTotal annual fund operating expenses after expense waiver and reimbursement1The 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.2Expense Waiver and Reimbursement and Total annual fund operating expenses after expense waiver and reimbursement have been restated to reflect the current contractual expense arrangement.3The Manager has contractually agreed to waive and/or reimburse the A Class, C Class, Y Class and Investor Class of the Fund for Distribution Fees and Other Expenses, as applicable, through February 29, 2012 to the extent that Total Annual Fund Operating Expenses exceed 0.85% for the A Class, 1.60% for the C Class, 0.64% for the Y Class and 0.79% for the Investor Class (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.58Annual Fund Operating Expenses - American Beacon Short Term Bond Fund (Class A, C, Institutional, Y, and Investor) American Beacon Short-Term Bond Fund Class A, C, Institutional, Y and InvestorUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalseAnnual Fund Operating Expenses [Table]12false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalseExpense Example [Heading]13false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00This 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. 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The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalseShare classfalseUSDfalsefalse$2falseColumnprimaryElement*5false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue335335falsefalsefalsetruefalse2truefalsetrue263263falsefalsefalsetruefalse3truefalsetrue3636falsefalsefalsetruefalse4truefalsetrue6565falsefalsefalsetruefalse5truefalsetrue8181falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse1 yearfalseUSDfalsefalse$3falseColumnprimaryElement*6false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue550550falsefalsefalsetruefalse2truefalsetrue599599falsefalsefalsetruefalse3truefalsetrue113113falsefalsefalsetruefalse4truefalsetrue207207falsefalsefalsetruefalse5truefalsetrue267267falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse3 yearsfalseUSDfalsefalse$4falseColumnprimaryElement*7false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue783783falsefalsefalsetruefalse2truefalsetrue10621062falsefalsefalsetruefalse3truefalsetrue197197falsefalsefalsetruefalse4truefalsetrue361361falsefalsefalsetruefalse5truefalsetrue470470falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse5 yearsfalseUSDfalsefalse$5falseColumnprimaryElement*8false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue14521452falsefalsefalsetruefalse2truefalsetrue23432343falsefalsefalsetruefalse3truefalsetrue443443falsefalsefalsetruefalse4truefalsetrue809809falsefalsefalsetruefalse5truefalsetrue10541054falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. 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Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalsePortfolio Turnover [Heading]18false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The 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.falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalsePortfolio Turnover [Text Block]19false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<i>Principal Investment Strategies</i>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalseStrategy [Heading]20false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>Under normal market conditions, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in obligations of the U.S. Government, its agencies and instrumentalities, including U.S. Government-sponsored enterprises (some of which are not backed by the full faith and credit of the U.S. Government); corporate debt securities, such as commercial paper, master demand notes, master demand notes, loan participation interests, medium-term notes and funding agreements, mortgage-backed securities, asset-backed securities, Yankeedollar and Eurodollar bank certificates of deposit, time deposits, bankers’ acceptances and other notes. These types of obligations are commonly referred to as fixed-income securities or bonds and may include foreign bonds. The Fund seeks capital appreciation by investing in corporate issues whose relative value is expected to increase over time.</p><p>Currently, the Manager is the sole investment advisor to the Fund. In determining which securities to buy and sell, the Manager employs a top-down fixed-income investment strategy, as follows:</p><p> • Develop an overall investment strategy, including a portfolio duration target, by examining the current trends in the U.S. economy.</p><p> • Set desired portfolio maturity structure by comparing the differences between corporate and U.S. Government securities of similar duration to judge their potential for optimal return in accordance with the target duration benchmark.</p><p> • Determine the weightings of each security type by analyzing the difference in yield spreads between corporate and U.S. Government securities.</p><p> • Select specific debt securities within each security type. Select specific debt securities within each security type.</p><p> • Review and monitor portfolio composition for changes in credit, risk-return profile and comparisons with benchmarks.</p><p>The Fund will only buy debt securities that are determined by the Manger to be investment grade at the time of purchase. If an investment held by the Fund is downgraded below investment grade, the Manager will take action that it believes to be advantageous to the Fund. Under normal circumstances, the Fund seeks to maintain a duration of one to three years. A duration of “one year” means that a security’s price would be expected to decrease by approximately 1% with a 1% increase in interest rates.</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalseStrategy Narrative [Text Block]21false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<i>Principal Risks</i>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalseRisk [Heading]22false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>There is no assurance that the Fund will achieve its investment objective and you could lose money by investing in the Fund. 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:</p><p><b>Interest Rate Risk</b></p><p>The Fund is subject to the risk that the market value of the bonds it holds will decline due to rising interest rates. When interest rates rise, the prices of most bonds go down. The price of a bond is also affected by its maturity. Bonds with longer maturities generally have greater sensitivity to changes in interest rates.</p><p><b>Market Risk</b></p><p>The Fund is subject to market risks that can affect the value of its shares. These risks include political, regulatory, market and economic developments, including developments that impact specific economic sectors, industries or segments of the market. For example, market risk involves the possibility that the value of the Fund’s investments will decline due to drops in the overall high yield bond market. Changes in the economic climate, investor perceptions, and stock market volatility can cause the prices of the Fund’s investments to decline, regardless of the financial conditions of the issuers held by the Fund. From time to time, certain securities held by the Fund may have limited marketability or contractual limitations on their resale and may be difficult to value and sell at favorable times or prices. If the Fund is forced to sell securities to meet redemption requests, the Fund may have to sell those securities at a loss.</p><p><b>Credit Risk</b></p><p>The Fund is subject to the risk that the issuer of a bond will fail to make timely payment of interest or principal. A decline in an issuer’s credit rating can cause the price of its bonds to go down.</p><p><b>Prepayment and Extension Risk</b></p><p>The Fund’s investments in asset-backed and mortgage-backed securities are subject to the risk that the principal amount of the underlying collateral may be repaid prior to the bond’s maturity date. If this occurs, no additional interest will be paid on the investment and the Fund may have to invest at a lower rate. Conversely, a decrease in expected prepayments may result in the extension of a security’s effective maturity and a decline in its price.</p><p><b>Foreign Investing Risk</b></p><p> Oversees investing caries potential risks not associated with domestic investments. Such risks include, but are not limited to: (1) currency exchange rate fluctuations, (2) political and financial instability, (3) less liquidity and greater volatility, (4) lack of uniform accounting, auditing and financial reporting standards; (5) increased price volatility; (6) less government regulation and supervision of foreign stock exchanges, brokers and listed companies; and (7) delays in transaction settlement in some foreign markets.</p><p><b>Securities Selection Risk</b></p><p> Securities selected by the Manager or a 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.</p><p><b>Investment Risk</b></p><p>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.</p><p><b>U.S. Government Securities Risk</b></p><p>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. They are also subject to credit risk and interest rate.</p><p><b>Government-Sponsored Enterprises Risk</b></p><p>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 Farm Credit Banks 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. They are also subject to credit risk and interest rate risk.</p><p><b>Market Events</b></p><p>Turbulence in financial markets and reduced liquidity in credit and fixed-income markets may negatively affect many issuers worldwide which may have an adverse effect on the Fund.</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalseRisk Narrative [Text Block]23false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<i>Fund Performance</i>falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalseBar Chart and Performance Table [Heading]24false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>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 and the Lipper Short Investment Grade Bond Funds Index, a composite of mutual funds comparable to the Fund. Performance shown in the chart and tables below reflects the Fund’s one-time receipt in December 2006 of class action settlement proceeds that were related to investment activity in 2002. The Fund’s performance for all periods that include December 2006 was significantly higher than it would have been absent receipt of the settlement proceeds.</p><p>The chart and the table below show the performance of the Fund’s Institutional Class shares for all periods. The Fund began offering Investor Class shares on August 1, 1994, Y Class shares on March 1, 2010, A Class shares on May 17, 2010 and C Class shares on September 1, 2010. In the table below, the performance of the Institutional Class is shown for Y Class shares and the performance of the Investor Class is shown for the A Class and C Class shares prior to the dates such new share classes were first offered. In each case, the newer share classes would have had similar annual returns to the older share classes because the shares are invested in the same portfolio securities. However, because the older share classes had lower expenses, their performance was better than the newer share classes would have realized in the same period. 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.</p><p>Sales charges are not reflected in the bar chart and table below. 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Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. 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If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. 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If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse030rr_AnnualReturn2003truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03400.0340falsefalsefalsetruefalseOthernanafalsefalse034falseRowprimaryElement*7false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.01510.0151falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. 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Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. 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Sharesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, C, Institutional, Y and Investordei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldiabf809593_ProspectusFourMemberdei_LegalEntityAxisexplicitMemberfalsefalseInstitutional Class, American Beacon Short-Term Bond Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldiabf809593_C000004800Memberrr_ProspectusShareClassAxisexplicitMemberAmerican Beacon Short-Term Bond FundReturn After Taxes on Distributions and Sale of Fund SharesClass A, C, Institutional, Y and InvestorInstitutional Class, American Beacon Short-Term Bond FundStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Institutional ClassInstitutional Classfalsefalsefalsetruefalse2falsetruefalse00Return After Taxes on Distributions and Sale of Fund SharesReturn After Taxes on Distributions and Sale of Fund Sharesfalsefalsefalsetruefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsetruefalse001987-12-031987-12-03falsefalsetruetruefalse5truetruetrue0.01870.0187falsefalsefalsetruefalse6truetruetrue0.02780.0278falsefalsefalsetruefalse7truetruetrue0.02510.0251falsefalsefalsetruefalseOthernanafalsefalseAmerican Beacon Short-Term Bond Fund Return After Taxes on Distributions and Sale of Fund Shares Institutional Class, American Beacon Short-Term Bond Fund8falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-03-01T00:00:002011-03-01T00:00:00falsefalseLipper Short Investment Grade Bond Funds Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiabf809593_LipperShortInvestmentGradeBondFundsIndexMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalsePerformance Measurerr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, C, Institutional, Y and Investordei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldiabf809593_ProspectusFourMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberLipper Short Investment Grade Bond Funds IndexPerformance MeasureClass A, C, Institutional, Y and InvestorShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsetruefalse00Lipper Short Investment Grade Bond Funds IndexLipper Short Investment Grade Bond Funds Indexfalsefalsefalsetruefalse3falsefalsefalse00Indices (reflects no deduction for fees, expenses or taxes)Indices (reflects no deduction for fees, expenses or taxes)falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsefalsefalse5truetruetrue0.04550.0455falsefalsefalsetruefalse6truetruetrue0.03760.0376falsefalsefalsetruefalse7truetruetrue0.03640.0364falsefalsefalsetruefalseOthernanafalsefalseLipper Short Investment Grade Bond Funds Index9falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-03-01T00:00:002011-03-01T00:00:00falsefalseBofA Merrill Lynch 1-3 Yr Gov./Corp. Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiabf809593_BofMerrillLynchOneToThreeYrGovCorpIndexMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalsePerformance Measurerr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, C, Institutional, Y and Investordei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldiabf809593_ProspectusFourMemberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberBofA Merrill Lynch 1-3 Yr Gov./Corp. IndexPerformance MeasureClass A, C, Institutional, Y and InvestorShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsetruefalse00BofA Merrill Lynch 1-3 Yr Gov./Corp. IndexBofA Merrill Lynch 1-3 Yr Gov./Corp. Indexfalsefalsefalsetruefalse3falsefalsefalse00Indices (reflects no deduction for fees, expenses or taxes)Indices (reflects no deduction for fees, expenses or taxes)falsefalsefalsetruefalse4falsefalsefalse00falsefalsefalsefalsefalse5truetruetrue0.02820.0282falsefalsefalsetruefalse6truetruetrue0.04490.0449falsefalsefalsetruefalse7truetruetrue0.04270.0427falsefalsefalsetruefalseOthernanafalsefalseBofA Merrill Lynch 1-3 Yr Gov./Corp. Index79Average Annual Total Returns - American Beacon Short Term Bond Fund (Class A, C, Institutional, Y and Investor) Class A, C, Institutional, Y and InvestorUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalsePerformance [Table]1<i>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 IRA or a 401(k), the after-tax returns do not apply to your situation.</i>128Risk/Return Summary - American Beacon Short-Term Bond Fund (Class A, C, Institutional, Y and Investor) (American Beacon Short-Term Bond Fund, Class A, C, Institutional, Y and Investor)UnKnownUnKnownUnKnownUnKnownfalsetrue