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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Entity Central Index Key dei_EntityCentralIndexKey 0000809593
American Beacon Intermediate Bond Fund | American Beacon Intermediate Bond Fund
  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading

American Beacon Intermediate Bond Fund

Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading

Fund Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

In the “Fund Performance” section, the Average Annual Total Returns table for the Investor Class is replaced with the following:

Risk/Return Supplement [Text Block] ck0000809593_SupplementTextBlock

American Beacon Intermediate Bond Fund

 

Supplement dated May 19, 2014
to the
Prospectus dated February 28, 2014

 

The information below supplements the Prospectus dated February 28, 2014 and is in addition to any other supplement(s):

 

In the “Fund Performance” section, the bar chart is replaced with the following:

Bar Chart [Heading] rr_BarChartHeading

Calendar year total returns for Investor Class shares Total Return for the Calendar Year Ended 12/31 of each Year

 [1]
Performance Table [Heading] rr_PerformanceTableHeading

Average Annual Total Returns For the periods ended December 31, 2013

 [2],[3]
Supplement Closing [Text Block] ck0000809593_SupplementClosingTextBlock

PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE
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 IRA 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 Investor Class shares; after-tax returns for other share classes will vary.
American Beacon Intermediate Bond Fund | American Beacon Intermediate Bond Fund | Investor Class
  
Risk/Return: rr_RiskReturnAbstract  
Annual Return 2004 rr_AnnualReturn2004 4.02%
Annual Return 2005 rr_AnnualReturn2005 2.43%
Annual Return 2006 rr_AnnualReturn2006 4.55%
Annual Return 2007 rr_AnnualReturn2007 7.19%
Annual Return 2008 rr_AnnualReturn2008 5.12%
Annual Return 2009 rr_AnnualReturn2009 6.78%
Annual Return 2010 rr_AnnualReturn2010 5.83%
Annual Return 2011 rr_AnnualReturn2011 5.99%
Annual Return 2012 rr_AnnualReturn2012 4.50%
Annual Return 2013 rr_AnnualReturn2013 (2.12%)
1 Year rr_AverageAnnualReturnYear01 (2.12%)
5 Years rr_AverageAnnualReturnYear05 4.14%
10 Years rr_AverageAnnualReturnYear10 4.40%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 02, 2009
American Beacon Intermediate Bond Fund | American Beacon Intermediate Bond Fund | Investor Class | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (3.26%)
5 Years rr_AverageAnnualReturnYear05 2.88%
10 Years rr_AverageAnnualReturnYear10 2.93%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 02, 2009
American Beacon Intermediate Bond Fund | American Beacon Intermediate Bond Fund | Investor Class | After Taxes on Distributions and Sales
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (1.17%)
5 Years rr_AverageAnnualReturnYear05 2.78%
10 Years rr_AverageAnnualReturnYear10 2.88%
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 02, 2009
[1] The bar chart shows the performance of the Fund's Investor Class shares for consistency with disclosures included in the Fund's annual report to shareholders for the period ended October 31, 2013.
[2] After-tax returns are shown only for Investor 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.
[3] The table shows the after-tax return of the Fund's Investor Class shares for consistency with disclosures included in the Fund's annual report to shareholders for the period ended October 31, 2013.