2.2.0.25truefalse010008 - Document - Risk/Return Summary - American Beacon Retirement Income and Appreciation Fund (Class A, C, Y and Investor) {Unlabeled}falsefalsefalse1falsefalsetruefalse{dei_DocumentInformationDocumentAxis} : American Beacon Retirement Income and Appreciation Fund {dei_LegalEntityAxis} : Class A, C, Y and Investor 3/1/2010 - 3/1/2011 TwelveMonthsEnded_01Mar2011_S000001821_Member_Prospectus_Six_Memberhttp://www.sec.gov/CIK0000809593duration2010-03-01T00:00:002011-03-01T00:00:00falsefalseAmerican Beacon Retirement Income and Appreciation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiabf809593_S000001821Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, C, Y and Investordei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldiabf809593_ProspectusSixMemberdei_LegalEntityAxisexplicitMember1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://americanbeaconfunds.com/role/riskreturnsummaryamericanbeaconretirementincomeandappreciationfundclasscyandinvestorshares1falsefalsefalse00American Beacon Retirement Income and Appreciation Fund | Class A, C, Y and InvestorAmerican Beacon Retirement Income and Appreciation Fund | Class A, C, Y and Investorfalsefalsefalsefalsefalse1falsefalsetruefalse{dei_DocumentInformationDocumentAxis} : American Beacon Retirement Income and Appreciation Fund {dei_LegalEntityAxis} : Class A, C, Y and Investor 3/1/2010 - 3/1/2011 TwelveMonthsEnded_01Mar2011_S000001821_Member_Prospectus_Six_Memberhttp://www.sec.gov/CIK0000809593duration2010-03-01T00:00:002011-03-01T00:00:00falsefalseAmerican Beacon Retirement Income and Appreciation Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiabf809593_S000001821Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, C, Y and Investordei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldiabf809593_ProspectusSixMemberdei_LegalEntityAxisexplicitMemberOthernaNo definition available.No authoritative reference available.falsefalseAmerican Beacon Retirement Income and Appreciation Fund | Class A, C, Y and Investor3false0abf809593_SupplementPerformanceTableFootnoteTextBlockabf809593falsenadurationSupplement Performance Table Footnote TextBlock.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The information below supplements the Prospectus dated March 1, 2011 by replacing the footnote in the Average Total Returns table in the &#8220;Fund Performance&#8221; section on page 44 with the following:falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringSupplement Performance Table Footnote TextBlock.No authoritative reference available.falsefalseSupplement Performance Table Footnote [Text Block]4false0rr_PerformanceTableFootnotesTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<i>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&#8217;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>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a table showing the Fund's (A) average annual total return; (B) average annual total return (after taxes on distributions); and (C) average annual total return (after taxes on distributions and redemption). A Money Market Fund should show only the returns described in clause (A) of the preceding sentence. All returns should be shown for 1-, 5-, and 10- calendar year periods ending on the date of the most recently completed calendar year (or for the life of the Fund, if shorter), but only for periods subsequent to the effective date of the Fund's registration statement. The table also shouldshow the returns of an appropriate broadbased securities market index as defined in Instruction 5 to Item 22(b)(7) for the same periods. A Fund that has been in existence for more than 10 years also may include returns for the life of the Fund. A Money Market Fund may provide the Fund's 7-day yield ending on the date of the most recent calendar year or disclose a toll-free (or collect) telephone number that investors can use to obtain the Fund's current 7-day yield. For a Fund (other than a Money Market Fund or a Fund described in General Instruction C.3.(d)(iii)), provide the information in the following table with the specified captions AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, _____)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Subsection b falsefalsePerformance Table Footnotes13Risk/Return Summary - American Beacon Retirement Income and Appreciation Fund (Class A, C, Y and Investor) (American Beacon Retirement Income and Appreciation Fund, Class A, C, Y and Investor)UnKnownUnKnownUnKnownUnKnownfalsetrue