v3.25.3
Label Element Value
American Funds U.S. Government Money Market Fund  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk/Return [Heading] oef_RiskReturnHeading American Funds U.S. Government Money Market Fund
Objective [Heading] oef_ObjectiveHeading Investment objective
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock

The investment objective of the fund is to provide you with a way to earn income on your cash reserves while preserving capital and maintaining liquidity. The fund is a government money market fund that seeks to preserve the value of your investment at $1.00 per share.
Expense Heading [Optional Text] oef_ExpenseHeading Fees and expenses of the fund
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. For example, in addition to the fees and expenses described below, you may also be required to pay brokerage commissions on purchases and sales of Class F-2, F-3, 529-F-2, 529-F-3 or ABLE-F-2 shares of the fund. Upon selling shares of the fund or exchanging those shares for shares of the American Funds, Capital Group KKR Public-Private+ Funds and/or Emerging Markets Equities Fund, Inc. (collectively “Capital Group Funds”), you may qualify for certain sales charge discounts. More information about these and other discounts is available from your financial professional and in the sales charge waiver appendix to this prospectus.

Shareholder Fees Caption [Optional Text] oef_ShareholderFeesCaption Shareholder fees (fees paid directly from your investment)
Operating Expenses Caption [Optional Text] oef_OperatingExpensesCaption Annual fund operating expenses (expenses that you pay each year as a percentage of the net asset value of your investment)
Expense Example [Heading] oef_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] oef_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds.

The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. The example reflects the fee waiver described above through the expiration date of such fee waiver and total annual fund operating expenses thereafter. You may be required to pay brokerage commissions on your purchases and sales of Class F-2, F-3, 529-F-2, 529-F-3 or ABLE-F-2 shares of the fund, which are not reflected in the example.

Expense Example by, Year, Caption [Text] oef_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, No Redemption, By Year, Caption [Text] oef_ExpenseExampleNoRedemptionByYearCaption For the share classes listed to the right, you would pay the following if you did not redeem your shares:
Strategy [Heading] oef_StrategyHeading Principal investment strategies
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock

The fund will invest at least 99.5% of its total assets in cash, U.S. Treasury securities and other government securities guaranteed or issued by an agency or instrumentality of the U.S. government, and repurchase agreements that are fully collateralized by cash or government securities. Additionally, at least 80% of the fund’s assets will normally be invested in securities that are issued or guaranteed by the U.S. government, its agencies and instrumentalities, and repurchase agreements that are fully collateralized by government securities.

Repurchase agreements are agreements under which the fund purchases a security from a bank or broker-dealer and obtains a simultaneous commitment from the seller to repurchase the security at a specified time and price. Because the security purchased by the fund constitutes collateral for the seller’s repurchase obligation, a repurchase agreement is effectively a loan by the fund that is collateralized by the security purchased. The fund will only enter into repurchase agreements involving securities of the type (excluding any maturity limitations) in which it could otherwise invest. In practice, the fund expects to enter only into repurchase agreements that are fully collateralized by cash or U.S. government securities.

The fund relies on the professional judgment of its investment adviser to make decisions about the fund’s portfolio investments. The basic investment philosophy of the investment adviser is to seek to provide current income while preserving capital and maintaining liquidity.
Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Investment results
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock

The following bar chart shows how the fund’s investment results have varied from year to year, and the following table shows how the fund’s average annual total returns for various periods compare with a broad measure of securities market results and, if applicable, other measures of market results that reflect the fund’s investment universe. This information provides some indication of the risks of investing in the fund. Past investment results are not predictive of future investment results. Prior to October 30, 2020, certain fees, such as 12b-1 fees, were not charged on Class 529-F-1 shares. If these expenses had been deducted, results would have been lower. Updated information on the fund’s investment results can be obtained by visiting capitalgroup.com.
Performance Information Illustrates Variability of Returns [Text] oef_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart shows how the fund’s investment results have varied from year to year, and the following table shows how the fund’s average annual total returns for various periods compare with a broad measure of securities market results and, if applicable, other measures of market results that reflect the fund’s investment universe.
Performance Availability Website Address [Text] oef_PerformanceAvailabilityWebSiteAddress capitalgroup.com
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture Past investment results are not predictive of future investment results.
Bar Chart [Heading] oef_BarChartHeading Calendar year total returns for Class F-2 shares
Bar Chart Narrative [Text Block] oef_BarChartNarrativeTextBlock

The following bar chart shows how the fund’s investment results have varied from year to year, and the following table shows how the fund’s average annual total returns for various periods compare with a broad measure of securities market results and, if applicable, other measures of market results that reflect the fund’s investment universe.
Bar Chart Closing [Text Block] oef_BarChartClosingTextBlock

Highest/Lowest quarterly results during this period were:

Highest 1.28% (quarter ended December 31, 2023)

Lowest 0.00% (quarter ended March 31, 2015)

The fund's total return for the nine months ended September 30, 2025, was 3.00%.
Year to Date Return, Label [Optional Text] oef_YearToDateReturnLabel The fund's total return for the nine months ended
Bar Chart, Year to Date Return, Date oef_BarChartYearToDateReturnDate Sep. 30, 2025
Bar Chart, Year to Date Return oef_BarChartYearToDateReturn 3.00%
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Highest
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Dec. 31, 2023
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 1.28%
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel Lowest
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Mar. 31, 2015
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn none
Average Annual Return, Caption [Optional Text] oef_AverageAnnualReturnCaption Average annual total returns For the periods ended December 31, 2024:
Money Market Seven Day Yield Phone oef_MoneyMarketSevenDayYieldPhone (800) 421-4225
American Funds U.S. Government Money Market Fund | Risk Money Market Fund Price Fluctuates [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Accordingly, the current market values for these securities will fluctuate with changes in interest rates and the credit rating of the U.
American Funds U.S. Government Money Market Fund | Risk Money Market Fund Sponsor May Not Provide Support [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock The fund’s sponsor is not required to reimburse the fund for losses, and you should not expect that the sponsor will provide financial support to the fund at any time, including during periods of market stress.
American Funds U.S. Government Money Market Fund | Risk Money Market Fund May Not Preserve Dollar [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.
American Funds U.S. Government Money Market Fund | Risk Not Insured [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock An investment in the fund is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
American Funds U.S. Government Money Market Fund | Risk Lose Money [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock You could lose money by investing in the fund.
American Funds U.S. Government Money Market Fund | Market conditions [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Market conditions — The prices of, and the income generated by, the securities held by the fund may decline – sometimes rapidly or unpredictably – due to various factors, including events or conditions affecting the general economy or particular industries or companies; overall market changes; local, regional or global political, social or economic instability; governmental, governmental agency or central bank responses to economic conditions; levels of public debt and deficits; changes in inflation rates; and currency exchange rate, interest rate and commodity price fluctuations.

Economies and financial markets throughout the world are highly interconnected. Economic, financial or political events, trading and tariff arrangements, wars, terrorism, cybersecurity events, natural disasters, public health emergencies (such as the spread of infectious disease), bank failures and other circumstances in one country or region, including actions taken by governmental or quasi-governmental authorities in response to any of the foregoing, could have impacts on global economies or markets. As a result, whether or not the fund invests in securities of issuers located in or with significant exposure to the countries affected, the value and liquidity of the fund’s investments may be negatively affected by developments in other countries and regions.
American Funds U.S. Government Money Market Fund | Investing in securities backed by the U.S. government [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Investing in securities backed by the U.S. government — U.S. government securities are subject to market risk, interest rate risk and credit risk. Securities backed by the U.S. Treasury or the full faith and credit of the U.S. government are guaranteed only as to the timely payment of interest and principal when held to maturity. Accordingly, the current market values for these securities will fluctuate with changes in interest rates and the credit rating of the U.S. government. Notwithstanding that these securities are backed by the full faith and credit of the U.S. government, circumstances could arise that would prevent or delay the payment of interest or principal on these securities, which could adversely affect their value and the fund's ability to preserve the value of your investment. In such a situation, the fund may not be able to preserve its net asset value of $1.00 per share. Such an event could lead to significant disruptions in U.S. and global markets.

Securities issued by U.S. government-sponsored entities and federal agencies and instrumentalities that are not backed by the full faith and credit of the U.S. government are neither issued nor guaranteed by the U.S. government.
American Funds U.S. Government Money Market Fund | Interest Rate Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Interest rate risk — The values and liquidity of the securities held by the fund may be affected by changing interest rates. For example, the values of these securities may decline when interest rates rise and increase when interest rates fall. Longer maturity debt securities generally have greater sensitivity to changes in interest rates and may be subject to greater price fluctuations than shorter maturity debt securities. The fund may invest in variable and floating rate securities. When the fund holds variable or floating rate securities, a decrease in market interest rates will adversely affect the income received from such securities and the net asset value of the fund’s shares. Although the values of such securities are generally less sensitive to interest rate changes than those of other debt securities, the value of variable and floating rate securities may decline if their interest rates do not rise as quickly, or as much, as market interest rates. Conversely, floating rate securities will not generally increase in value if interest rates decline. During

periods of extremely low or negative short-term interest rates, the fund may not be able to maintain a positive yield or total return or be able to preserve the value of your investment at $1.00 per share and, in relatively low interest rate environments, there are heightened risks associated with rising interest rates.
American Funds U.S. Government Money Market Fund | Investing in repurchase agreements [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Investing in repurchase agreements — Upon entering into a repurchase agreement, the fund purchases a security from a bank or broker-dealer, which simultaneously commits to repurchase the security within a specified time at the fund’s cost with interest. The security purchased by the fund constitutes collateral for the seller’s repurchase obligation. If the party agreeing to repurchase should default, the fund may seek to sell the security it holds as collateral. The fund may incur a loss if the value of the collateral securing the repurchase obligation falls below the repurchase price. The fund may also incur disposition costs and encounter procedural delays in connection with liquidating the collateral.
American Funds U.S. Government Money Market Fund | Management [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Management — The investment adviser to the fund actively manages the fund’s investments. Consequently, the fund is subject to the risk that the methods and analyses, including models, tools and data, employed by the investment adviser in this process may be flawed or incorrect and may not produce the desired results.
American Funds U.S. Government Money Market Fund | Class A  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.13%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.10%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.49%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 50
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 157
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 274
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 616
American Funds U.S. Government Money Market Fund | Class 529-F-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.72%
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.72%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 74
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 230
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 401
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 894
American Funds U.S. Government Money Market Fund | Class R-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.10%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.36%
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.36%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 37
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 116
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 202
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 456
American Funds U.S. Government Money Market Fund | Class R-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.38%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.39%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 142
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 440
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 761
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,669
American Funds U.S. Government Money Market Fund | Class R-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.19%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.95%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 97
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 303
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 525
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,166
American Funds U.S. Government Money Market Fund | Class R-4  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.14%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.65%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 66
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 208
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 362
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 810
American Funds U.S. Government Money Market Fund | Class R-5  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.09%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.35%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 36
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 113
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 197
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 443
American Funds U.S. Government Money Market Fund | Class R-6  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.04%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.30%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 31
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 97
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 169
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 381
American Funds U.S. Government Money Market Fund | Class C  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.24%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.11%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.61%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 162
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 195
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 340
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 727
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 62
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 195
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 340
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 727
American Funds U.S. Government Money Market Fund | Class F-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.24%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.15%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.65%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 66
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 208
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 362
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 810
American Funds U.S. Government Money Market Fund | Class F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.12%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.38%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 39
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 122
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 213
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 480
American Funds U.S. Government Money Market Fund | Class 529-A  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.13%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.15%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.54%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 55
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 173
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 302
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 677
American Funds U.S. Government Money Market Fund | Class 529-C  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.24%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.16%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.66%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 167
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 211
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 368
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 741
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 67
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 211
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 368
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 741
American Funds U.S. Government Money Market Fund | Class 529-E  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.14%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.65%
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.65%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 66
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 208
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 362
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 810
American Funds U.S. Government Money Market Fund | Class R-2E  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.60%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.24%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.10%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 112
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 350
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 606
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 1,340
American Funds U.S. Government Money Market Fund | Class R-5E  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.19%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.45%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 46
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 144
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 252
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 567
American Funds U.S. Government Money Market Fund | Class F-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.04%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.30%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 31
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 97
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 169
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 381
American Funds U.S. Government Money Market Fund | Class 529-T  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.15%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.41%
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.41%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 291
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 378
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 474
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 755
American Funds U.S. Government Money Market Fund | Class T  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.10%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.36%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 286
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 363
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 447
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 694
American Funds U.S. Government Money Market Fund | Class ABLE-A  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.11%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.14%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.51%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets (0.05%) [1]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.46%
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination Dec. 01, 2026
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 47
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 159
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 280
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 636
American Funds U.S. Government Money Market Fund | Class ABLE-F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.14%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.40%
Fee Waiver or Reimbursement oef_FeeWaiverOrReimbursementOverAssets (0.05%) [1]
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.35%
Fee Waiver or Reimbursement over Assets, Date of Termination oef_FeeWaiverOrReimbursementOverAssetsDateOfTermination Dec. 01, 2026
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 36
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 123
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 219
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 500
American Funds U.S. Government Money Market Fund | Class 529-F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.15%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.41%
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.41%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 42
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 132
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 230
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 518
American Funds U.S. Government Money Market Fund | Class 529-F-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) oef_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther 0.00%
Redemption Fee (as a percentage of Amount Redeemed) oef_RedemptionFeeOverRedemption 0.00%
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.26%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.09%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.35%
Net Expenses (as a percentage of Assets) oef_NetExpensesOverAssets 0.35%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 36
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 113
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 197
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 $ 443
USTREAS T-Bill Auction Ave 3 Mon (reflects no deductions for sales charges, account fees, expenses or U.S. federal income taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.28%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.63%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.86%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.21%
Class A  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.80%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.20%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.48%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.94%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class 529-F-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.82%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.19%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.44%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.92%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class R-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.94%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.25%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.48%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.94%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class R-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 3.88%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.66%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.95%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.60%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class R-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.34%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.91%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.17%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.74%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class R-4  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.65%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.08%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.33%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.85%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class R-5  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.96%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.26%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.50%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.96%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class R-6  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.01%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.29%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.54%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.98%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class C  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 3.68%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.15%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.46%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.94%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class F-1  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.64%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.08%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.32%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.84%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Annual Return [Percent] oef_AnnlRtrPct none
Annual Return [Percent] oef_AnnlRtrPct none
Annual Return [Percent] oef_AnnlRtrPct 0.44%
Annual Return [Percent] oef_AnnlRtrPct 1.44%
Annual Return [Percent] oef_AnnlRtrPct 1.82%
Annual Return [Percent] oef_AnnlRtrPct 0.27%
Annual Return [Percent] oef_AnnlRtrPct none
Annual Return [Percent] oef_AnnlRtrPct 1.36%
Annual Return [Percent] oef_AnnlRtrPct 4.81%
Annual Return [Percent] oef_AnnlRtrPct 4.94%
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.94%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.25%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.49%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.95%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class 529-A  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.75%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.16%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.43%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.91%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class 529-C  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 3.62%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.11%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.43%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.91%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class 529-E  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.64%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.12%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.41%
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.90%
Performance Inception Date oef_PerfInceptionDate May 01, 2009
Class R-2E  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.18%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.83%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.09%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.06%
Performance Inception Date oef_PerfInceptionDate Aug. 29, 2014
Class R-5E  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.86%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.20%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.58%
Performance Inception Date oef_PerfInceptionDate Nov. 20, 2015
Class F-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.01%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.29%
Average Annual Return, Percent oef_AvgAnnlRtrPct 1.94%
Performance Inception Date oef_PerfInceptionDate Jan. 27, 2017
Class ABLE-A  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.84%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.21%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.12%
Performance Inception Date oef_PerfInceptionDate Jul. 13, 2018
Class ABLE-F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.96%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.65%
Performance Inception Date oef_PerfInceptionDate Oct. 30, 2020
Class 529-F-2  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.89%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.61%
Performance Inception Date oef_PerfInceptionDate Oct. 30, 2020
Class 529-F-3  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.95%
Average Annual Return, Percent oef_AvgAnnlRtrPct 2.64%
Performance Inception Date oef_PerfInceptionDate Oct. 30, 2020
[1] Commonwealth Savers Plan, as program administrator of ABLEAmerica, is currently waiving the fee owed to it as compensation for its oversight and administration of ABLEAmerica. This waiver will be in effect through at least December 1, 2026. Subject to the terms of its contractual arrangement with the investment adviser, Commonwealth Savers Plan may elect to extend, modify or terminate the waiver at that time.