Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	CHARLES SCHWAB FAMILY OF FUNDS
Prospectus Date	rr_ProspectusDate	Apr. 27, 2018
Schwab Treasury Obligations Money Fund - Sweep Shares | Schwab U.S. Treasury Money Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Schwab U.S. Treasury Money FundTM
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 and hold shares of the fund.
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)
Expenses Restated to Reflect Current [Text]	rr_ExpensesRestatedToReflectCurrent	The information in the table has been restated to reflect current fees and expenses.
Expense Example [Heading]	rr_ExpenseExampleHeading	Example
Expense Example by Year [Heading]	rr_ExpenseExampleByYearHeading	Expenses on a $10,000 Investment
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 mutual 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 expense reduction. The expenses would be the same whether you stayed in the fund or sold your shares at the end of each period. Your actual costs may be higher or lower.
Strategy [Heading]	rr_StrategyHeading	Principal Investment Strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	To pursue its goal, the fund typically invests in securities backed by the full faith and credit of the U.S. government. 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 and/or government securities; (including bills and notes); 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. Treasury securities (excluding cash). With respect to the 80% policy, the fund will notify its shareholders at least 60 days before changing the policy. The full faith and credit backing is the strongest backing offered by the U.S. government, and traditionally is considered by investors to be the highest degree of safety as far as the payment of principal and interest. Based on the fund manager’s view of market conditions for U.S. Treasury securities, the fund may invest up to 20% of its net assets in: (i) 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; and (ii) obligations that are issued by private issuers that are guaranteed as to principal or interest by the U.S. government, its agencies or instrumentalities. Obligations that are issued by private issuers that are guaranteed as to principal or interest by the U.S. government, its agencies or instrumentalities are considered U.S. government securities under the rules that govern money market funds. 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. By investing primarily in full faith and credit U.S. government investments, the fund seeks to provide maximum safety as to its assets. The fund is distinct from certain other types of government money market funds in that it does not invest in repurchase agreements. The portfolio 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. Because the income from U.S. Treasury securities is exempt from state and local income taxes, the fund generally expects that the majority of the dividends it pays will be exempt from those taxes as well. (Dividends still will be subject to federal income tax.) However, the fund may invest up to 20% of its net assets in non-U.S Treasury investments that are not exempt from state and local income taxes. Further, during unusual market conditions, the fund may invest a greater portion of its assets in investments that are not exempt from state and local income taxes as a temporary defensive measure. When the fund engages in such activities, it may not achieve its investment goal. 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: 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, the fund’s yield (and total return) also will be low or may even be negative, which may make it difficult for the fund to pay expenses out of fund assets or maintain a stable $1.00 share price. A change in a central bank’s monetary policy or improving economic conditions may result in an increase in interest rates. The fund is currently subject to heightened levels of interest rate risk because of the continued economic recovery, along with the fact that the Federal Reserve Board ended its quantitative easing program in 2014, and has begun, and may continue, to raise interest rates. A sudden or unpredictable rise in interest rates may cause volatility in the market and 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. Credit Risk. The fund is subject to the risk that a decline in the credit quality of a portfolio investment could cause the fund to lose money or underperform. The fund could lose money if the issuer of a portfolio investment fails to make timely principal or interest payments or if a guarantor, liquidity provider or counterparty of a portfolio investment fails to honor its obligations. Negative perceptions of the ability of an issuer, guarantor, liquidity provider or counterparty to make payments or otherwise honor its obligations, as applicable, could also cause the price of that investment to decline. 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. Many of the 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 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 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 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 [Text]	rr_RiskMoneyMarketFund	Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	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 investment results have varied from year to year, and the following table shows the fund’s 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.schwabfunds.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 investment results have varied from year to year, and the following table shows the fund’s average annual total returns for various periods.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.schwabfunds.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: 0.62% Q1 2008 Worst Quarter: 0.00% Q1 2014
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns as of 12/31/17
Money Market Seven Day Yield Phone	rr_MoneyMarketSevenDayYieldPhone	1-877-824-5615
Schwab Treasury Obligations Money Fund - Sweep Shares | Schwab U.S. Treasury Money Fund | Sweep Shares
Risk/Return:	rr_RiskReturnAbstract
Shareholder Fees (fees paid directly from your investment)	rr_ShareholderFeeOther	none
Management fees	rr_ManagementFeesOverAssets	0.31%
Distribution (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.31%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.62%
Less expense reduction	rr_FeeWaiverOrReimbursementOverAssets	(0.07%)
Total annual fund operating expenses after expense reduction	rr_NetExpensesOverAssets	0.55%	[1],[2]
1 Year	rr_ExpenseExampleYear01	$ 56
3 Years	rr_ExpenseExampleYear03	176
5 Years	rr_ExpenseExampleYear05	307
10 Years	rr_ExpenseExampleYear10	$ 689
2008	rr_AnnualReturn2008	1.35%
2009	rr_AnnualReturn2009	0.01%
2010	rr_AnnualReturn2010	0.01%
2011	rr_AnnualReturn2011	0.01%
2012	rr_AnnualReturn2012	0.01%
2013	rr_AnnualReturn2013	0.01%
2014	rr_AnnualReturn2014	none
2015	rr_AnnualReturn2015	none
2016	rr_AnnualReturn2016	0.01%
2017	rr_AnnualReturn2017	0.30%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best Quarter:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Mar. 31, 2008
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	0.62%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst Quarter:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Mar. 31, 2014
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	none
Label	rr_AverageAnnualReturnLabel	Sweep Shares
1 Year	rr_AverageAnnualReturnYear01	0.30%
5 Years	rr_AverageAnnualReturnYear05	0.06%
10 Years	rr_AverageAnnualReturnYear10	0.17%

[1] The information in the table has been restated to reflect current fees and expenses.

[2] 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 fund to 0.55% 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.