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            <identifier scheme="http://www.sec.gov/CIK">0000809593</identifier>
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            <startDate>2025-02-05</startDate>
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    <dei:DocumentPeriodEndDate contextRef="AsOf2025-02-05" id="Fact000004">2024-10-31</dei:DocumentPeriodEndDate>
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    <dei:EntityRegistrantName contextRef="AsOf2025-02-05" id="Fact000006">AMERICAN BEACON FUNDS</dei:EntityRegistrantName>
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      contextRef="From2025-02-052025-02-05_custom_S000063601Member"
      id="Fact000016">&lt;p id="xdx_80A_err--SupplementToProspectusTextBlock_hdei--LegalEntityAxis__custom--S000063601Member_zfIjXiokhl64" style="font: 0pt Arial, Helvetica, Sans-Serif; margin: 0; text-align: center"&gt;&lt;b&gt;&#160;&lt;/b&gt;&lt;/p&gt;
&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Arial, Helvetica, Sans-Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0"&gt;&lt;/td&gt;&lt;td style="width: 18pt"&gt;&lt;b&gt;I.&lt;/b&gt;&lt;/td&gt;&lt;td style="text-align: justify"&gt;Effective February 4, 2025, the name of the sub-advisor is changed to Global IMC LLC and all
                                                                references to EAM Global Investors LLC are deleted and replaced with references to Global IMC LLC.&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;

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&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Arial, Helvetica, Sans-Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0"&gt;&lt;/td&gt;&lt;td style="width: 18pt"&gt;&lt;b&gt;II.&lt;/b&gt;&lt;/td&gt;&lt;td style="text-align: justify"&gt;Effective February 4, 2025, references to EAM Investors, LLC are deleted and replaced with references to The Informed Momentum Company LLC. &lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;


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&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Arial, Helvetica, Sans-Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0"&gt;&lt;/td&gt;&lt;td style="width: 18pt"&gt;&lt;b&gt;III.&lt;/b&gt;&lt;/td&gt;&lt;td style="text-align: justify"&gt;Effective February 24, 2025, the name of the Fund is changed to American Beacon IMC International Small
Cap Fund, and all references to the American Beacon EAM International Small Cap Fund are deleted and replaced with American Beacon IMC
International Small Cap Fund.&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;


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