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Sweep Shares Prospectus | Schwab Government Money Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Schwab® Government Money Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The fund’s goal is to seek the highest current income consistent with stability of capital and liquidity.
Expense [Heading] rr_ExpenseHeading Fund Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses 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 table and Example below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a % of the value of your investment)
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those time 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 figures are based on total annual fund operating expenses after any expense reduction. Your actual costs may be higher or lower.
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption Expenses on a $10,000 Investment
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
To pursue its goal, the fund invests in U.S. government securities, such as:
•
U.S. Treasury bills and notes
​
•
other obligations that are issued by the U.S. government, its agencies or instrumentalities, including obligations that are not fully guaranteed by the U.S. Treasury, such as those issued by the Federal National Mortgage Association (Fannie Mae), the Federal Home Loan Mortgage Corporation (Freddie Mac) and the Federal Home Loan Banks
​
•
repurchase agreements that are collateralized fully by cash and/ or U.S. government securities
​
•
obligations that are issued by private issuers that are guaranteed as to principal or interest by the U.S. government, its agencies or instrumentalities
​
The fund intends to operate as a government money market fund under the regulations governing money market funds. The fund will invest at least 99.5% of its total assets in cash, U.S. government securities and/or repurchase agreements that are collateralized fully by cash and/or U.S. government securities; under normal circumstances, at least 80% of the fund’s net assets (including, for this purpose, any borrowings for investment purposes) will be invested solely in U.S. government securities including repurchase agreements that are collateralized fully by U.S. government securities (excluding cash). With respect to the 80% policy, the fund will notify its shareholders at least 60 days before changing the policy.
In choosing securities, the fund’s manager seeks to maximize current income within the limits of the fund’s investment objective and credit, maturity and diversification policies. Some of these policies may be stricter than the federal regulations that apply to all money market funds.
The investment adviser’s credit research department analyzes and monitors the securities that the fund owns or is considering buying. The manager may adjust the fund’s holdings or its average maturity based on actual or anticipated changes in credit quality or market dynamics, such as interest rates. To preserve its investors’ capital, the fund seeks to maintain a stable $1.00 share price.
For temporary defensive purposes during unusual market conditions, the fund may invest up to 100% of its assets in cash, cash equivalents or other high quality short-term investments.
As a government money market fund, the fund’s Board of Trustees (the Board) has determined not to subject the fund to a liquidity fee and/or a redemption gate on fund redemptions. Please note that the Board has reserved its ability to change this determination with respect to liquidity fees and/or redemption gates, but only after providing appropriate prior notice to shareholders.
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
The fund is subject to risks, any of which could cause an investor to lose money. The fund’s principal risks include:
Market Risk. Financial markets rise and fall in response to a variety of factors, sometimes rapidly and unpredictably. Markets may be impacted by economic, political, regulatory and other conditions, including economic sanctions and other government actions. In addition, the occurrence of global events, such as war, terrorism, environmental disasters, natural disasters and epidemics, may also negatively affect the financial markets. These events could reduce consumer demand or economic output; result in market closures, low or negative interest rates, travel restrictions or quarantines; and significantly adversely impact the economy. Governmental and quasi-governmental authorities and regulators throughout the world have in the past often responded to serious economic disruptions with a variety of significant fiscal and monetary policy changes which could have an unexpected impact on financial markets and the fund’s investments. As with any investment whose performance is tied to these markets, the value of an investment in the fund will fluctuate, which means that an investor could lose money over short or long periods.
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.
Interest Rate Risk. Interest rates rise and fall over time. As with any investment whose yield reflects current interest rates, the fund’s yield will change over time. During periods when interest rates are low or there are negative interest rates, the fund’s yield (and total return) also could be low or even negative. In addition, the fund may be unable to pay expenses out of fund assets or maintain a stable $1.00 share price. Also, a change in a central bank’s monetary policy or economic conditions may result in a change in interest rates, which could have sudden and unpredictable effects on the markets. A sudden or unpredictable rise or decline in interest rates may cause volatility. Volatility in the market may decrease liquidity in the money market securities markets, making it more difficult for the fund to sell its money market investments at a time when the investment adviser might wish to sell such investments. Decreased market liquidity also may make it more difficult to value some or all of the fund’s money market securities holdings.
Stable Net Asset Value Risk. If the fund or another money market fund fails to maintain a stable net asset value (or such perception exists in the market place), the fund could experience increased redemptions, which may adversely impact the fund’s share price. The fund is permitted, among other things, to reduce or withhold any income and/or gains generated from its portfolio to maintain a stable $1.00 share price.
Repurchase Agreements Risk. When the fund enters into a repurchase agreement, the fund is exposed to the risk that the other party (i.e., the counterparty) will not fulfill its contractual obligation. In a repurchase agreement, there exists the risk that,
when the fund buys a security from a counterparty that agrees to repurchase the security at an agreed upon price (usually higher) and time, the counterparty will not repurchase the security.
Credit Risk. A decline in the credit quality of an issuer, guarantor or liquidity provider of a portfolio investment or a counterparty could cause the fund to lose money or underperform. The fund could lose money if, due to a decline in credit quality, the issuer, guarantor or liquidity provider of a portfolio investment or a counterparty fails to make, or is perceived as being unable or unwilling to make, timely principal or interest payments or otherwise honor its obligations. Even though the fund’s investments in repurchase agreements are collateralized at all times, there is some risk to the fund if the other party should default on its obligations and the fund is delayed or prevented from recovering or disposing of the collateral. The credit quality of the fund’s portfolio holdings can change rapidly in certain market environments and any downgrade or default on the part of a single portfolio investment could cause the fund’s share price or yield to fall.
Certain U.S. government securities that the fund invests in are not backed by the full faith and credit of the U.S. government, which means they are neither issued nor guaranteed by the U.S. Treasury. Although maintained in conservatorship by the Federal Housing Finance Agency (FHFA) since September 2008, Fannie Mae and Freddie Mac maintain only lines of credit with the U.S. Treasury. The Federal Home Loan Banks maintain limited access to credit lines from the U.S. Treasury. Other securities, such as obligations issued by the Federal Farm Credit Banks Funding Corporation, are supported solely by the credit of the issuer. There can be no assurance that the U.S. government will provide financial support to securities of its agencies and instrumentalities if it is not obligated to do so under law. Also, any government guarantees on securities the fund owns do not extend to the shares of the fund itself.
Management Risk. Any actively managed mutual fund is subject to the risk that its investment adviser will select investments or allocate assets in a manner that could cause the fund to underperform or otherwise not meet its investment objective. The fund’s investment adviser applies its own investment techniques and risk analyses in making investment decisions for the fund, but there can be no guarantee that they will produce the desired results. The investment adviser’s maturity decisions will also affect the fund’s yield, and potentially could affect its share price. To the extent that the investment adviser anticipates interest rate trends imprecisely, the fund’s yield at times could lag the yields of other money market funds.
Redemption Risk. The fund may experience periods of heavy redemptions that could cause the fund to liquidate its assets at inopportune times or at a loss or depressed value, particularly during periods of declining or illiquid markets. Redemptions by a few large investors in the fund may have a significant adverse effect on the fund’s ability to maintain a stable $1.00 share price. In the event any money market fund fails to maintain a stable net asset value, other money market funds, including the fund, could face a market-wide risk of increased redemption pressures, potentially jeopardizing the stability of their $1.00 share prices.
Money Market Fund Regulation Risk. The SEC and other regulatory agencies continue to review the regulation of money market funds. As of the date of this prospectus, the SEC has proposed amendments to the rules that govern money market funds. These proposed amendments, if implemented, may affect the fund’s investment strategies, performance, yield, expenses, operations and continued viability.
Money Market Fund Risk. The fund is not designed to offer capital appreciation. In exchange for their emphasis on stability and liquidity, money market investments may offer lower long-term performance than stock or bond investments.
Risk Lose Money [Text] rr_RiskLoseMoney The fund is subject to risks, any of which could cause an investor to lose money.
Risk Money Market Fund May Not Preserve Dollar [Text] rr_RiskMoneyMarketFundMayNotPreserveDollar Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so.
Risk Money Market Fund Price Fluctuates [Text] rr_RiskMoneyMarketFundPriceFluctuates As with any investment whose performance is tied to these markets, the value of an investment in the fund will fluctuate, which means that an investor could lose money over short or long periods.
Risk Money Market Fund Sponsor May Not Provide Support [Text] rr_RiskMoneyMarketFundSponsorMayNotProvideSupport 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.
RIsk Not Insured [Text] rr_RiskNotInsured An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart below shows how the fund’s Sweep Shares investment results have varied from year to year, and the following table shows the fund’s Sweep Shares average annual total returns for various periods. This information provides some indication of the risks of investing in the fund. All figures assume distributions were reinvested. Keep in mind that future performance may differ from past performance. For current performance information, please see www.schwabassetmanagement.com/schwabfunds_prospectus or call toll-free 1-877-824-5615 for the fund’s current seven-day yield.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart below shows how the fund’s Sweep Shares investment results have varied from year to year, and the following table shows the fund’s Sweep Shares average annual total returns for various periods.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.schwabassetmanagement.com/schwabfunds_prospectus
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Keep in mind that future performance may differ from past performance.
Bar Chart [Heading] rr_BarChartHeading Annual Total Returns (%) as of 12/31
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter: 0.46% Q2 2019
Worst Quarter: 0.00% Q1 2016
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 0.46%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2016
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn none
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns as of 12/31/21
Money Market Seven Day Yield Phone rr_MoneyMarketSevenDayYieldPhone 1-877-824-5615
Sweep Shares Prospectus | Schwab Government Money Fund | Sweep Shares  
Risk/Return: rr_RiskReturnAbstract  
Shareholder Fees (fees paid directly from your investment) ​ rr_ShareholderFeeOther none
Management fees rr_ManagementFeesOverAssets 0.19%
Distribution (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.26%
Total annual fund operating expenses rr_ExpensesOverAssets 0.45%
Less expense reduction rr_FeeWaiverOrReimbursementOverAssets (0.01%)
Total annual fund operating expenses after expense reduction rr_NetExpensesOverAssets 0.44% [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 45
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 141
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 246
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 555
Annual Return 2012 rr_AnnualReturn2012 0.01%
Annual Return 2013 rr_AnnualReturn2013 0.01%
Annual Return 2014 rr_AnnualReturn2014 none
Annual Return 2015 rr_AnnualReturn2015 none
Annual Return 2016 rr_AnnualReturn2016 0.01%
Annual Return 2017 rr_AnnualReturn2017 0.26%
Annual Return 2018 rr_AnnualReturn2018 1.23%
Annual Return 2019 rr_AnnualReturn2019 1.66%
Annual Return 2020 rr_AnnualReturn2020 0.24%
Annual Return 2021 rr_AnnualReturn2021 0.02%
Label rr_AverageAnnualReturnLabel Sweep Shares
1 Year rr_AverageAnnualReturnYear01 0.02%
5 Years rr_AverageAnnualReturnYear05 0.68%
10 Years rr_AverageAnnualReturnYear10 0.34%
[1] The investment adviser and its affiliates have agreed to limit the total annual fund operating expenses (excluding interest, taxes and certain non-routine expenses) of the Sweep Shares to 0.44% for so long as the investment adviser serves as the adviser to the fund (contractual expense limitation agreement). This contractual expense limitation agreement may only be amended or terminated with the approval of the fund’s Board of Trustees.