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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Entity Central Index Key dei_EntityCentralIndexKey 0000809593
American Beacon Zebra Small Cap Equity Fund | American Beacon Zebra Small Cap Equity Fund
  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading

American Beacon Zebra Small Cap Equity Fund
Risk/Return Supplement [Text Block] ck0000809593_SupplementTextBlock

American Beacon Zebra Global Equity Fund

American Beacon Zebra Small Cap Equity Fund

American Beacon Flexible Bond Fund

 

Supplement dated October 2, 2013

to the

Prospectus dated December 31, 2012

 

The information below supplements the Prospectus dated December 31, 2012 and is in addition to any other supplement(s):

 

In the “Fees and Expenses of the Fund” section, the fee table and footnotes are deleted and replaced with the following:
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 2013-12-31
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The Total Annual Fund Operating Expenses do not correlate to the ratio of expenses to average net assets provided in the Fund’s Financial Highlights table, which reflects the operating expenses of the Fund and does not include Acquired Fund Fees and Expenses.
Expense Example [Heading] rr_ExpenseExampleHeading

Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption

Assuming no redemption of shares:
American Beacon Zebra Small Cap Equity Fund | American Beacon Zebra Small Cap Equity Fund | 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 (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 0.50% [1]
Management fees rr_ManagementFeesOverAssets 0.57%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 2.89%
Acquired Fund Fees and Expense rr_AcquiredFundFeesAndExpensesOverAssets 0.05%
Total annual fund operating expenses rr_ExpensesOverAssets 3.76% [2]
Expense Reduction and Reimbursement rr_FeeWaiverOrReimbursementOverAssets 2.22%
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 1.54% [3]
1 year rr_ExpenseExampleYear01 $ 723
3 years rr_ExpenseExampleYear03 1,465
5 years rr_ExpenseExampleYear05 2,226
10 years rr_ExpenseExampleYear10 4,212
American Beacon Zebra Small Cap Equity Fund | American Beacon Zebra Small Cap Equity Fund | 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 (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther 1.00%
Management fees rr_ManagementFeesOverAssets 0.57%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 2.91%
Acquired Fund Fees and Expense rr_AcquiredFundFeesAndExpensesOverAssets 0.05%
Total annual fund operating expenses rr_ExpensesOverAssets 4.53% [2]
Expense Reduction and Reimbursement rr_FeeWaiverOrReimbursementOverAssets 2.24%
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 2.29% [3]
1 year rr_ExpenseExampleYear01 332
3 years rr_ExpenseExampleYear03 1,167
5 years rr_ExpenseExampleYear05 2,111
10 years rr_ExpenseExampleYear10 4,509
1 year rr_ExpenseExampleNoRedemptionYear01 232
3 years rr_ExpenseExampleNoRedemptionYear03 1,167
5 years rr_ExpenseExampleNoRedemptionYear05 2,111
10 years rr_ExpenseExampleNoRedemptionYear10 4,509
American Beacon Zebra Small Cap Equity Fund | American Beacon Zebra Small Cap Equity Fund | 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 (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.57%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 2.82%
Acquired Fund Fees and Expense rr_AcquiredFundFeesAndExpensesOverAssets 0.05%
Total annual fund operating expenses rr_ExpensesOverAssets 3.44% [2]
Expense Reduction and Reimbursement rr_FeeWaiverOrReimbursementOverAssets 2.30%
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 1.14% [3]
1 year rr_ExpenseExampleYear01 116
3 years rr_ExpenseExampleYear03 842
5 years rr_ExpenseExampleYear05 1,590
10 years rr_ExpenseExampleYear10 3,566
American Beacon Zebra Small Cap Equity Fund | American Beacon Zebra Small Cap Equity Fund | 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 (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.57%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 2.61%
Acquired Fund Fees and Expense rr_AcquiredFundFeesAndExpensesOverAssets 0.05%
Total annual fund operating expenses rr_ExpensesOverAssets 3.23% [2]
Expense Reduction and Reimbursement rr_FeeWaiverOrReimbursementOverAssets 2.19%
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 1.04% [3]
1 year rr_ExpenseExampleYear01 106
3 years rr_ExpenseExampleYear03 790
5 years rr_ExpenseExampleYear05 1,498
10 years rr_ExpenseExampleYear10 3,380
American Beacon Zebra Small Cap Equity Fund | American Beacon Zebra Small Cap Equity Fund | 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 (as a percentage of the lower of original offering price or redemption proceeds) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.57%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 3.03%
Acquired Fund Fees and Expense rr_AcquiredFundFeesAndExpensesOverAssets 0.05%
Total annual fund operating expenses rr_ExpensesOverAssets 3.65% [2]
Expense Reduction and Reimbursement rr_FeeWaiverOrReimbursementOverAssets 2.23%
Total annual fund operating expenses after expense reduction and reimbursement rr_NetExpensesOverAssets 1.42% [3]
1 year rr_ExpenseExampleYear01 145
3 years rr_ExpenseExampleYear03 912
5 years rr_ExpenseExampleYear05 1,699
10 years rr_ExpenseExampleYear10 $ 3,763
[1] A contingent deferred sales charge ('CDSC') of 0.50% will be charged on certain purchases of $1,000,000 or more of A Class shares that are redeemed in whole or part within 18 months of purchase.
[2] The 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.
[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 Distribution Fees and Other Expenses, as applicable, through December 31, 2013 to the extent that Total Annual Fund Operating Expenses exceed 1.49% for the A Class, 2.24% for the C Class, 1.09% for the Y Class, 0.99% for the Institutional Class, and 1.37% 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.