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Investment Risks - American Beacon Select Funds - American Beacon U.S. Government Money Market Select Fund
Dec. 31, 2025
Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] You could lose money by investing in the Fund.
Risk Not Insured Depository Institution [Member]  
Prospectus [Line Items]  
Risk [Text Block] An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Credit Risk  
Prospectus [Line Items]  
Risk [Text Block]
Credit Risk
The value of a security held by the Fund may decline if the security’s credit quality, or that of the security’s issuer or provider of credit support, is downgraded or their credit quality otherwise falls. A decline in the credit rating of an individual security held by the Fund may have an adverse impact on its price. Rating agencies might not always change their credit rating on an issuer or security in a timely manner to reflect events that could affect the issuer’s ability to make
timely payments on its obligations. As with any money market fund, there is the risk that the issuers or guarantors of securities owned by the Fund, including securities issued by U.S. Government agencies, which are not backed by the full faith and credit of the U.S. Government, will default on the payment of principal or interest or the obligation to repurchase securities from the Fund. This could cause the Fund’s NAV to decline below $1.00 per share.
Interest Rate Risk  
Prospectus [Line Items]  
Risk [Text Block]
Interest Rate Risk
Generally, the value of investments with interest rate risk will move in the opposite direction as movements in interest rates. Factors including central bank monetary policy, rising inflation rates, and changes in general economic conditions may cause interest rates to rise. When interest rates go up, the market values of previously issued money market instruments generally decline and may have an adverse effect on the Fund’s ability to maintain a stable $1.00 share price. A decline in short-term interest rates or a low interest rate environment would lower the Fund’s yield and the return on your investment, which may have an adverse effect on the Fund’s ability to provide a positive yield to its shareholders. A zero interest rate environment may prevent the Fund from providing a positive yield to shareholders or paying the Fund’s expenses out of Fund assets and could impair the Fund’s ability to maintain a stable net asset value. Changes in interest rates also may change the resale value of the instruments held in the Fund’s portfolio.
Investment Risk  
Prospectus [Line Items]  
Risk [Text Block]
Investment Risk
You could lose money by investing in the Fund. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The Fund’s sponsor has no legal obligation to provide financial support to the Fund, and you should not expect that the sponsor will provide financial support to the Fund at any time.
Liquidity Risk  
Prospectus [Line Items]  
Risk [Text Block]
Liquidity Risk
The Fund is susceptible to the risk that certain investments held by the Fund may become less liquid in response to market developments or adverse credit events that may affect issuers or guarantors of a security. An inability to sell a portfolio position at favorable times or prices can adversely affect the Fund’s ability to maintain a $1.00 share price. The Fund could lose money if it is unable to dispose of an investment at a time that is most beneficial to the Fund. In addition, the Fund may experience difficulty satisfying redemption requests within the time periods stated in the “Redemption Policies” section of this Prospectus because of unusual market conditions, an unusually high volume of redemption requests or other reasons.
Market Risk  
Prospectus [Line Items]  
Risk [Text Block]
Market Risk
The Fund is subject to the risk that the securities markets will move down, sometimes rapidly and unpredictably, based on overall economic conditions and other factors, which may negatively affect the Fund’s performance. The financial markets generally move in cycles, with periods of rising prices followed by periods of declining prices. The value of your investment may reflect these fluctuations. During a general downturn in the securities markets, multiple asset classes may decline in value simultaneously. Even when certain securities prices have generally increased over time, there have been periods of price decreases during those times, resulting in losses for investors, which are likely to occur again in the future.
Geopolitical and other events, including war, terrorism, trade disputes, pandemics, public health crises, natural disasters, and  cybersecurity incidents, have led, and in the future may continue to lead, to general instability in world economies and markets and reduced liquidity in securities, which may negatively affect the value of your investment.
Policies established by the  U.S. government and/or Federal Reserve and economic and political circumstances within the U.S. and abroad, such as inflation, changes in interest rates, recessions, changes in government leadership, a government’s inability to agree on a budget, high public debt, the threat or occurrence of a federal government shutdown and threats or the occurrence of a failure to increase the federal government’s debt limit, which could result in a default on the government’s obligations, may negatively affect investor and consumer confidence and may negatively impact financial markets and the broader economy, perhaps suddenly and to a significant degree.
Markets and market participants are increasingly reliant upon public and proprietary data and systems. Data or technology malfunctions and inaccuracies may disrupt markets and lead to negative consequences for market participants like the Fund.  
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Recent Market Events Risk. Both U.S. and international markets have experienced significant volatility in recent months and years. As a result of such volatility, investment returns may fluctuate significantly. Moreover, during periods of significant volatility, the risks discussed herein associated with an investment in the Fund may be increased. National economies are substantially interconnected, as are global financial markets, which creates the possibility that conditions in one country or region might adversely impact issuers in a different country or region. However, the interconnectedness of economies and/or markets may be changing, which may impact such economies and markets in ways that cannot be foreseen at this time.
Some countries, including the  U.S., have adopted more protectionist trade policies, including trade tariffs and other trade barriers, which is a trend that appears to be continuing globally. The economies of all nations, including the U.S., are subject to the risks of slowing global economic growth, protectionist trade policies, inflationary pressures, limits imposed by international trade and security agreements, political or economic dysfunction, poor consumer sentiment, and reduced demand for goods due to fluctuating commodity prices and currency values, and these risks may create significant market volatility in ways that cannot be foreseen at the present time. These economic risks could have a negative impact on the Fund’s investments.
The U.S. Federal Reserve and certain foreign central banks have started to lower interest rates , though economic or other factors could stop or reverse such changes. It is difficult to accurately predict the various economic and political factors that influence the pace at which interest rates might change, the timing, frequency or magnitude of any such changes in interest rates, or when such changes might stop or again reverse course. Changes in interest rates could lead to an economic slowdown in the U.S. and abroad, significant market volatility and reduced liquidity in certain sectors of the market.
Tensions, war, or open conflict between nations, such as among the United States, Israel and Iran, between Russia and Ukraine, otherwise in the Middle East or in eastern Asia could affect the economies of many nations, including the United States and may contribute to increased volatility and uncertainty in the financial markets. The extent and duration of ongoing hostilities and related sanctions and the repercussions of such events cannot be predicted. Those events have presented and could continue to present material uncertainty and risk with respect to markets globally, including in the oil and gas markets and potentially other industries and sectors, and the performance of the Fund and its investments or operations could be negatively impacted.  
Advancements in technology, including advanced development and increased regulation of artificial intelligence, may adversely impact market movements and liquidity. As artificial intelligence is used more widely, which can occur relatively rapidly, the profitability and growth of certain issuers and industries may be negatively impacted in ways that cannot be foreseen and could adversely impact issuer and market performance. As a consequence, the Fund’s holdings and its overall performance could be negatively impacted.
Global climate change may affect property and security values. Certain issuers, industries and regions may be adversely affected by the impacts of climate change in ways that cannot be foreseen. The impacts of legislation, regulation and international accords related to climate change, as well as any indirect consequences that may not be foreseen, may negatively impact certain issuers, industries and regions.
Net Asset Value Risk  
Prospectus [Line Items]  
Risk [Text Block]
Net Asset Value Risk
There is no assurance that the Fund will meet its investment objective of maintaining a stable price of $1.00 per share on a continuous basis. Furthermore, there can be no assurance that the Fund’s affiliates will purchase distressed assets from the Fund, make capital infusions, enter into capital support
agreements or take other actions to ensure that the Fund maintains a NAV of $1.00 per share. If the Fund fails to maintain a stable NAV (or if there is a perceived threat of such a failure), the Fund, along with other money market funds, could be subject to increased redemption activity.
Other Investment Companies Risk  
Prospectus [Line Items]  
Risk [Text Block]
Other Investment Companies Risk
To the extent that the Fund invests in shares of other registered investment companies, the Fund will indirectly bear the fees and expenses charged by those investment companies in addition to the Fund’s direct fees and expenses. The Fund will be subject to the risks associated with the underlying investments in those companies, including but not limited to the following:
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Government Money Market Funds Risk. Investments in government money market funds are subject to interest rate risk, credit risk, and market risk.
Repurchase Agreement Risk  
Prospectus [Line Items]  
Risk [Text Block]
Repurchase Agreement Risk
The use of repurchase agreements involves counterparty risk and credit risk. The obligations of a counterparty to a repurchase agreement are not guaranteed. The Fund permits various forms of securities as collateral whose values fluctuate and that are not issued or guaranteed by the U.S. government. There are risks that a counterparty may default at a time when the collateral has declined in value, or a counterparty may become insolvent and subject to liquidation, which may affect the Fund’s right to control the collateral.
U.S. Government Securities and Government-Sponsored Enterprises Risk  
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Risk [Text Block]
U.S. Government Securities and Government-Sponsored Enterprises Risk
A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of coupons and the face value at maturity, not its current market price. The market prices for such securities are not guaranteed and will fluctuate. Certain securities held by the Fund that are issued by government-sponsored enterprises, such as the Federal National Mortgage Association (‘‘Fannie Mae’’), Federal Home Loan Mortgage Corporation (‘‘Freddie Mac’’), Federal Home Loan Bank (‘‘FHLB’’), and Federal Farm Credit Bank (“FFCB”), are not guaranteed by the U.S. Treasury and are not backed by the full faith and credit of the U.S. government, and no assurance can be given that the U.S. government will provide financial support if these organizations do not have the funds to meet future payment obligations. U.S. government securities and securities of government-sponsored enterprises are also subject to credit risk, interest rate risk and market risk. The rising U.S. national debt may lead to adverse impacts on the value of U.S. government securities due to potentially higher costs for the U.S. government to obtain new financing. It is possible that the U.S. government and government-sponsored enterprises will not have the funds to meet their payment obligations in the future.
U.S. Treasury Obligations Risk  
Prospectus [Line Items]  
Risk [Text Block]
U.S. Treasury Obligations Risk
The market value of U.S. Treasury obligations may vary due to fluctuations in interest rates. In addition, changes to the financial condition or credit rating of the U.S. government may cause the value of the Fund’s investments in obligations issued by the U.S. Treasury to decline. Certain political events in the U.S., such as a prolonged government shutdown or potential default on the national debt, may also cause investors to lose confidence in the U.S. government and may cause the value of U.S. Treasury obligations to decline.
Variable and Floating Rate Securities Risk  
Prospectus [Line Items]  
Risk [Text Block]
Variable and Floating Rate Securities Risk
The coupons on variable and floating-rate securities are not fixed and may fluctuate based upon changes in market rates. A variable rate security has a coupon that is adjusted at pre-designated periods in response to changes in the market rate of interest on which the coupon is based. The coupon on a floating rate security is generally based on an interest rate, such as a money-market index, Secured Overnight Financing Rate (“SOFR”), or a Treasury bill rate. Variable and floating rate securities are subject to interest rate risk and credit risk. As short-term interest rates decline, the coupons on variable and floating-rate securities typically decrease. Alternatively, during periods of rising short-term interest rates, the coupons on variable and floating-rate securities typically increase. Changes in the coupons of variable and floating-rate securities may lag behind changes in market rates or may have limits on the maximum increases in the coupon rates. The value of variable and floating-rate securities may decline if their coupons do not rise as much, or as quickly, as interest rates in general. Conversely, variable and floating rate securities will not generally increase in value if interest rates decline. Certain types of variable and floating rate instruments may be subject to greater liquidity risk than other debt securities.