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    <dei:EntityRegistrantName contextRef="AsOf2022-12-30">AMERICAN BEACON FUNDS</dei:EntityRegistrantName>
    <dei:DocumentEffectiveDate contextRef="AsOf2022-12-30">2022-12-30</dei:DocumentEffectiveDate>
    <rr:ProspectusDate contextRef="AsOf2022-12-30">2022-03-01</rr:ProspectusDate>
    <rr:StrategyHeading contextRef="AsOf2022-12-30_custom_S000063601Member">Principal
Investment Strategies</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock contextRef="AsOf2022-12-30_custom_S000063601Member">
&lt;p id="xdx_980_err--StrategyNarrativeTextBlock_c20221230__20221230__dei--LegalEntityAxis__custom--S000063601Member_gBFSNTB-MCID_zNI3iQLCglXi" style="font: 10pt Arial, Helvetica, Sans-Serif; padding-top: 10pt; margin: 0 0 0 54pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;Under normal circumstances,
at least 80% of the Fund&#x2019;s net assets (plus the amount of any borrowings for investment purposes) are invested in equity securities
of small market capitalization companies that are economically tied to countries outside of the United States, including developed and
emerging market countries. These companies have market capitalizations within the market capitalization range of the companies in the
MSCI&#xae; ACWI ex USA Small Cap Index at the time of investment. The market capitalization range of the MSCI ACWI ex USA Small Cap Index
was $2.5 million to $8.2 billion as of November 30, 2022. The Fund may hold smaller companies considered micro-capitalization companies,
as well as medium-capitalization companies. The Fund invests principally in equity securities, which may include common stocks, depositary
receipts and U.S. dollar-denominated foreign stocks traded on U.S. exchanges. The Fund&#x2019;s investments in equity securities may be
denominated in foreign currencies, and the Fund may invest directly in foreign currencies.&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 54pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&#160;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 54pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;The investment
process of the Fund&#x2019;s sub-advisor is based on bottom-up analysis of companies rather than top-down country or sector allocation.
The sub-advisor&#x2019;s process is intended to add long-term value primarily through stock selection. The Fund may have significant exposure
to Japanese and European companies. However, as the composition of the Fund&#x2019;s portfolio changes over time, the Fund&#x2019;s exposure
to Japan and Europe may be lower at a future date, and the Fund&#x2019;s exposure to other countries or regions may be higher.&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 54pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&#160;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0pt 0pt 0pt 54pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;The sub-advisor
seeks to generate returns by harnessing the power of the momentum premium, which is the principle that companies that have outperformed
in the recent past will continue to outperform for a period of time. The sub-advisor seeks to exploit behavioral biases around change,
which cause investors to underreact to new information. The sub-advisor believes these underreactions to new information lead to opportunities
to invest in companies with improving or accelerating
financial performance that is expected to continue, otherwise known as momentum. The sub-&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 54pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;advisor&#x2019;s disciplined &#x201c;Informed
Momentum&#x201d; approach to investing combines stock selection, tailored risk management, and efficient implementation to seek to harness
the momentum premium to generate returns. The stocks of companies held by the Fund may exhibit characteristics of both value stocks and
growth stocks during the time they are held by the Fund. The Fund holds approximately 100-150 investments.&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 54pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&#160;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 54pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;The Fund may also
invest cash balances in other investment companies, including a government money market fund advised by the Manager, with respect to
which the Manager also receives a management fee. The Fund may seek to earn additional income by lending its securities to certain qualified
broker-dealers and institutions on a short-term or long-term basis.&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 54pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&#160;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 54pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;The Fund may engage
in active and frequent trading of portfolio securities to achieve its principal investment strategies.&lt;/span&gt;&lt;/p&gt;</rr:StrategyNarrativeTextBlock>
    <rr:RiskNarrativeTextBlock contextRef="AsOf2022-12-30_custom_S000063601Member">
&lt;table cellpadding="0" cellspacing="0" style="font: 12pt Times New Roman, Times, Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 54pt"/&gt;&lt;td style="width: 18pt"&gt;&lt;span style="font-family: Symbol; font-size: 10pt; color: Black"&gt;&#xb7;&lt;/span&gt;&lt;/td&gt;&lt;td id="xdx_98D_err--RiskNarrativeTextBlock_c20221230__20221230__dei--LegalEntityAxis__custom--S000063601Member_gBFRNTB-OLY_zbDTLv3JIzAb" style="text-align: justify"&gt;&lt;span style="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt; color: Black"&gt;&lt;b&gt;&lt;span&gt;European
                                            Securities Risk. &lt;/span&gt;&lt;/b&gt;&lt;span&gt;The Fund&#x2019;s performance may be affected by political, social and
                                            economic conditions in Europe, such as growth of economic output (the gross national product),
                                            the rate of inflation, the rate at which capital is reinvested into European economies, the
                                            success of governmental actions to reduce budget deficits, the resource self-sufficiency
                                            of European countries and conflict between European countries. The European financial markets
                                            have experienced and may continue to experience volatility and adverse trends due to concerns
                                            relating to economic downturns; rising government debt levels and the possible default on
                                            government debt; national unemployment in several European countries; and, most recently,
                                            the COVID-19 pandemic and the Russian invasion of Ukraine. These events have adversely affected
                                            the exchange rate of the euro and may continue to significantly affect European countries.
                                            Responses to financial problems by European governments, central banks, and others, including
                                            austerity measures and other reforms, may not produce the desired results, may result in
                                            social unrest and may limit future growth and economic recovery or may have unintended consequences.
                                            In addition, one or more countries may abandon the euro and/or withdraw from the European
                                            Union (&#x201c;EU&#x201d;). The impact of these actions, especially if they occur in a disorderly
                                            fashion, could be significant and far-reaching.&lt;/span&gt;&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;div&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 72pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&lt;b&gt;&#160;&lt;/b&gt;&lt;/span&gt;&lt;/p&gt;

&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 72pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&lt;b/&gt;&lt;/span&gt;&lt;/p&gt;

&lt;/div&gt;
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&lt;tr style="vertical-align: top; text-align: left"&gt;
  &lt;td style="width: 54pt"&gt;&lt;span&gt;&#160;&lt;/span&gt;&lt;/td&gt;
  &lt;td style="width: 18pt"&gt;&lt;span&gt;&#160;&lt;/span&gt;&lt;/td&gt;
  &lt;td&gt;&lt;div&gt;&lt;div id="xdx_C08_gBFRNTB-OLY2_zGClT9cSo1V6"&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&lt;span&gt;Many EU nations
are susceptible to economic risks associated with high levels of debt, and a default or debt restricting by any European country could
adversely impact holders of that country&#x2019;s debt and sellers of credit default swaps linked to that country&#x2019;s creditworthiness,
which may be located in other countries. Such a default or debt restructuring could affect exposures to other EU countries and their
companies as well. In addition, issuers have faced difficulties obtaining credit or refinancing existing obligations, and financial markets
have experienced extreme volatility and declines in asset values and liquidity. Russia&#x2019;s war with Ukraine has negatively impacted
European economic activity. The effects on the economies of European countries of the Russia/Ukraine war and Russia&#x2019;s response
to sanctions imposed by the U.S. and other countries are impossible to predict, but have been and could continue to be significant. For
example, exports in Eastern Europe have been disrupted for certain key commodities, pushing commodity prices to record highs, and energy
prices in Europe have increased significantly.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;&lt;/div&gt;&lt;/div&gt;
&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0; text-align: justify"&gt;&lt;span style="color: Black"&gt;&#160;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 72pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&lt;b&gt;&lt;span&gt;High Portfolio
Turnover Risk&lt;/span&gt;&lt;/b&gt;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 72pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&lt;span&gt;Portfolio turnover
is a measure of the Fund&#x2019;s trading activity over a one-year period. A portfolio turnover rate of 100% would indicate that the Fund
sold and replaced the entire value of its securities holdings during the period. The Fund may engage in active and frequent trading and
may have a high portfolio turnover rate, which could increase the Fund&#x2019;s transaction costs, have a negative impact on performance,
and generate higher capital gain distributions to shareholders than if the Fund had a lower portfolio turnover rate.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 72pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&lt;b&gt;&#160;&lt;/b&gt;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 72pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&lt;b&gt;&lt;span&gt;Micro-Capitalization
Companies Risk&lt;/span&gt;&lt;/b&gt;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 72pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;Micro-capitalization
companies are subject to substantially greater risks of loss and price fluctuations, sometimes rapidly and unpredictably, because their
earnings and revenues tend to be less predictable. Since micro-capitalization companies may not have an operating history, product lines,
or financial resources, their share prices tend to be more volatile and their markets less liquid than companies with larger market capitalizations,
and they can be sensitive to changes in overall economic conditions, interest rates, borrowing costs and earnings. The shares of micro-capitalization
companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these
securities and the future ability to sell these securities.&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 36pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&#160;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 72pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&lt;b&gt;&lt;span&gt;Small-Capitalization
Companies Risk&lt;/span&gt;&lt;/b&gt;&lt;/span&gt;&lt;/p&gt;&lt;p style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 72pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;&lt;span&gt;Investing in the
securities of small-capitalization companies involves greater risk and the possibility of greater price volatility, which at times can
be rapid and unpredictable, than investing in larger-capitalization and more established companies. Since small-capitalization companies
may have narrower commercial markets, and more limited operating history, product lines, and managerial and financial resources than
larger, more established companies, the securities of these companies may lack sufficient market liquidity and they can be particularly
sensitive to changes in overall economic conditions, interest rates, borrowing costs and earnings.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;</rr:RiskNarrativeTextBlock>
    <rr:PerformanceNarrativeTextBlock contextRef="AsOf2022-12-30_custom_S000063601Member">
&lt;p id="xdx_987_err--PerformanceNarrativeTextBlock_c20221230__20221230__dei--LegalEntityAxis__custom--S000063601Member_zqhJwFVNAA7a" style="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 72pt; text-align: justify"&gt;&lt;span style="color: Black"&gt;Effective January 21, 2023, a new sub-advisor began managing the Fund and an 80% investment policy was implemented. Performance through January 20, 2023
reflects the Fund&#x2019;s performance under the management and strategy of its prior sub-advisor.&lt;/span&gt;&lt;/p&gt;</rr:PerformanceNarrativeTextBlock>
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