Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	CHARLES SCHWAB FAMILY OF FUNDS
Prospectus Date	rr_ProspectusDate	Apr. 27, 2018
Schwab New York Municipal Money Fund - Sweep Shares | Schwab New York Municipal Money Fund
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	Schwab New York Municipal Money FundTM
Objective [Heading]	rr_ObjectiveHeading	Investment Objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The fund’s goal is to seek current income that is exempt from federal income and New York state and local income tax, consistent with preservation of capital and liquidity. The fund’s investment objective is not fundamental and therefore may be changed by the fund’s Board of Trustees without shareholder approval.
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 Sweep 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’s Sweep Shares 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 Sweep Shares 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 invests in money market securities from New York issuers and from municipal agencies, U.S. territories and possessions. These securities may include general obligation issues, which typically are backed by the issuer’s ability to levy taxes; revenue bonds, which typically are backed by a stream of revenue from a given source, such as a public water system or hospital; municipal commercial paper and municipal notes; and municipal leases, which may be used to finance construction or equipment purchases. The fund may invest more than 25% of its total assets in municipal securities financing similar projects such as those relating to education, health care, transportation, utilities, industrial development and housing. Under normal circumstances, the fund will invest at least 80% of its net assets (including, for this purpose, any borrowings for investment purposes) in municipal money market securities the interest from which is exempt from federal income and New York state and local income tax. The fund may purchase certain variable-rate demand securities issued by closed-end municipal bond funds, which, in turn, invest primarily in portfolios of New York tax-exempt municipal bonds. It is anticipated that the interest on the variable-rate demand securities will be exempt from federal and New York State income tax. These securities are considered “municipal money market securities” for purposes of the fund’s 80% investment policy stated above. Many of the fund’s securities will be subject to credit or liquidity enhancements from U.S. and/or non-U.S. entities, which are designed to provide incremental levels of creditworthiness or liquidity. Some municipal securities have been structured to resemble variable- and floating-rate securities so that they meet the requirements for being considered money market instruments. 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 by operating as a “retail money market fund,” as such term is defined or interpreted under the rules governing money market funds. During unusual market conditions, the fund may invest in taxable money market securities as a temporary defensive measure. When the fund engages in such activities, it may not achieve its investment goal.
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. The fund may impose a fee upon the sale of your shares or may temporarily suspend your ability to sell shares if the fund’s liquidity falls below required minimums because of market conditions or other factors. 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. Retail Money Market Fund Risk. The fund is a “retail money market fund,” as such term is defined or interpreted under the rules governing money market funds. A “retail money market fund” is a money market fund that has policies and procedures reasonably designed to limit all beneficial owners of the fund to natural persons. The fund may involuntarily redeem any investor who is not a natural person. The fund will provide advance notice of its intent to make any such involuntary redemption. Neither the fund nor the investment adviser will be responsible for any loss or tax liability in an investor’s account resulting from such involuntary redemption. As a “retail money market fund,” the fund is permitted to value its securities using the amortized cost method to seek to maintain a stable $1.00 share price. However, the fund may be subject to liquidity fees and/or redemption gates on fund redemptions if the fund’s liquidity falls below required minimums because of market conditions or other factors. 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 or liquidity provider of a portfolio investment fails to honor its obligations. Negative perceptions of the ability of an issuer, guarantor or liquidity provider 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. The fund’s investments in securities with credit or liquidity enhancements provided by foreign entities may involve certain risks that are greater than those associated with investments in securities with credit or liquidity enhancements provided by U.S. entities. These include risks of adverse changes in foreign economic, political, regulatory and other conditions; the imposition of economic sanctions or other government restrictions; differing accounting, auditing, financial reporting and legal standards and practices; differing securities market structures; and higher transaction costs. In addition, sovereign risk, or the risk that a government may become unwilling or unable to meet its loan obligations or guarantees, could increase the credit risk of financial institutions connected to that particular country. Credit and Liquidity Enhancements Risk. The fund may invest in securities with credit or liquidity enhancements provided by a bank or other financial institution, and the existence and nature of such enhancements may be a significant factor in the investment adviser’s decision-making process. Generally, these enhancements are employed by the issuers of the securities to reduce credit risk and provide enhanced or back-up liquidity for a purchaser, such as the fund. Adverse developments affecting these banks and financial institutions could therefore have a negative effect on the value of the fund’s holdings. For example, a rating agency downgrade of a credit or liquidity enhancement provider may adversely affect the value of securities held by the fund. Any decline in the value of the securities held by the fund could cause the fund’s share price or yield to fall. To the extent that a portion of the fund’s underlying investments are enhanced by the same bank or financial institution, these risks may be increased. 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. State Risk. The fund invests primarily in securities issued by the state of New York and its municipalities. Any reduction in the credit ratings of obligations of these issuers could adversely affect the market values and marketability of such securities, and, consequently, the value of the fund’s portfolio. Further, the fund’s share price and performance could be affected by local, state and regional factors, including erosion of the tax base and changes in the economic climate. Certain New York constitutional amendments, legislative measures, executive orders and administrative regulations could result in adverse consequences, affecting the state of New York and/or its municipalities. National governmental actions, such as the elimination of tax-exempt status, also could affect performance. In addition, a municipality or municipal project that relies directly or indirectly on national governmental funding mechanisms may be negatively affected by the national government’s current budgetary constraints. Investment Concentration Risk. To the extent that the fund invests a substantial portion of its assets in municipal securities financing similar projects, the fund may be more sensitive to adverse economic, business or political developments affecting those projects. A change that affects one project, such as proposed legislation on the financing of the project, a shortage of materials needed for the project, or a declining need for the project, would likely affect all similar projects and the overall municipal securities market. Taxable Determinations Risk. Some of the fund’s income could be taxable. If certain types of investments the fund buys as tax-exempt are later ruled to be taxable, a portion of the fund’s income could become taxable. This risk, although generally considered low, is somewhat higher for investments that have been structured as municipal money market securities than for investments in other types of municipal money market securities. Any defensive investments in taxable securities could generate taxable income. Also, some types of municipal securities produce income that is subject to the federal alternative minimum tax (AMT). Liquidity Risk. Liquidity risk exists when particular investments are difficult to purchase, sell or value, especially during stressed market conditions. The market for certain investments may become illiquid due to specific adverse changes in the conditions of a particular issuer or under adverse market or economic conditions independent of the issuer. In addition, dealer inventories of certain securities – an indication of the ability of dealers to engage in “market making” – are at, or near, historic lows in relation to market size, which could potentially lead to decreased liquidity. In such cases, the fund, due to limitations on investments in illiquid securities and the difficulty in readily purchasing and selling such securities at favorable times or prices, may decline in value, experience lower returns and/or be unable to achieve its desired level of exposure to a certain issuer or sector. Further, transactions in illiquid securities may entail transaction costs that are higher than those for transactions in liquid securities. 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 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.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 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.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: 0.50% Q1 2008 Worst Quarter: 0.00% Q2 2016
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 New York Municipal Money Fund - Sweep Shares | Schwab New York Municipal Money Fund | Sweep Shares
Risk/Return:	rr_RiskReturnAbstract
Shareholder Fees (fees paid directly from your investment)	rr_ShareholderFeeOther	none
Management fees	rr_ManagementFeesOverAssets	0.34%
Distribution (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.27%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.61%
Less expense reduction	rr_FeeWaiverOrReimbursementOverAssets	(0.01%)
Total annual fund operating expenses after expense reduction	rr_NetExpensesOverAssets	0.60%	[1],[2]
1 Year	rr_ExpenseExampleYear01	$ 61
3 Years	rr_ExpenseExampleYear03	192
5 Years	rr_ExpenseExampleYear05	335
10 Years	rr_ExpenseExampleYear10	$ 750
2008	rr_AnnualReturn2008	1.62%
2009	rr_AnnualReturn2009	0.13%
2010	rr_AnnualReturn2010	0.04%
2011	rr_AnnualReturn2011	0.02%
2012	rr_AnnualReturn2012	0.02%
2013	rr_AnnualReturn2013	0.02%
2014	rr_AnnualReturn2014	0.02%
2015	rr_AnnualReturn2015	0.02%
2016	rr_AnnualReturn2016	0.04%
2017	rr_AnnualReturn2017	0.34%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best Quarter:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Mar. 31, 2008
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	0.50%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst Quarter:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Jun. 30, 2016
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	none
Label	rr_AverageAnnualReturnLabel	Sweep Shares
1 Year	rr_AverageAnnualReturnYear01	0.34%
5 Years	rr_AverageAnnualReturnYear05	0.09%
10 Years	rr_AverageAnnualReturnYear10	0.23%

[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 Sweep Shares to 0.60% 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.