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  <dei:DocumentType contextRef="Duration_16Dec2011_15Dec2012">485BPOS</dei:DocumentType>
  <dei:EntityRegistrantName contextRef="Duration_16Dec2011_15Dec2012">SCHWAB INVESTMENTS</dei:EntityRegistrantName>
  <dei:EntityCentralIndexKey contextRef="Duration_16Dec2011_15Dec2012">0000869365</dei:EntityCentralIndexKey>
  <dei:DocumentCreationDate contextRef="Duration_16Dec2011_15Dec2012">2012-12-14</dei:DocumentCreationDate>
  <dei:DocumentEffectiveDate contextRef="Duration_16Dec2011_15Dec2012">2012-12-14</dei:DocumentEffectiveDate>
  <dei:AmendmentFlag contextRef="Duration_16Dec2011_15Dec2012">false</dei:AmendmentFlag>
  <dei:DocumentPeriodEndDate contextRef="Duration_16Dec2011_15Dec2012">2012-08-31</dei:DocumentPeriodEndDate>
  <rr:ShareholderFeeOther contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="INF" unitRef="USD">0</rr:ShareholderFeeOther>
  <rr:ManagementFeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.003</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0032</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0062</rr:ExpensesOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" id="Item_2" unitRef="pure">0.0029</rr:NetExpensesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="INF" unitRef="USD">30</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="INF" unitRef="USD">93</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="INF" unitRef="USD">163</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="INF" unitRef="USD">368</rr:ExpenseExampleYear10>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0274</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0228</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0178</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberBarclaysUsGovernmentCreditOneToFiveYearsIndex_Member" decimals="4" unitRef="pure">0.0314</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0152</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0048</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0069</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberBarclaysUsGovernmentCreditOneToFiveYearsIndex_Member" decimals="4" unitRef="pure">0.0484</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0257</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0137</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0149</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberBarclaysUsGovernmentCreditOneToFiveYearsIndex_Member" decimals="4" unitRef="pure">0.043</rr:AverageAnnualReturnYear10>
  <rr:AnnualReturn2002 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0658</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0346</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0203</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0154</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0458</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.046</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">-0.0541</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0242</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0357</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0274</rr:AnnualReturn2011>
  <rr:RiskReturnHeading contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">Schwab Short-Term Bond Market Fund&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;TM&lt;/sup&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;b&gt;Investment objective &lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">The fund seeks high current income by tracking the performance of the Barclays U.S. Government/Credit: 1-5 Years Index.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;b&gt;Fund fees and expenses &lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">This table describes the fees and expenses you may pay if you buy and hold shares of the fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">Shareholder fees (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">Annual fund operating expenses (expenses that you pay each year&lt;br/&gt; as a % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">Example</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">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&amp;#8217;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.</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">Portfolio turnover</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the fund&amp;#8217;s performance. During the most recent fiscal year, the fund&amp;#8217;s portfolio turnover rate was 92% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;b&gt;Principal investment strategies &lt;/b&gt;</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;b&gt;Principal risks &lt;/b&gt;</rr:RiskHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;b&gt;Performance &lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index. 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 (both before and after taxes) may differ from past performance. For current performance information, please see www.schwabfunds.com/prospectus.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">Annual total returns (%) as of 12/31</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">Best quarter: 3.24% Q3 2002  &lt;br/&gt;Worst quarter: (1.58%) Q1 2008 &lt;br/&gt;Year-to-date performance (non-annualized and pre-tax) as of 9/30/12: 1.73%</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">Average annual total returns (%) as of 12/31/11</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PortfolioTurnoverRate contextRef="Duration_16Dec2011_15Dec2012S000006809_Member" decimals="4" unitRef="pure">0.92</rr:PortfolioTurnoverRate>
  <rr:RiskLoseMoney contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">The fund is subject to risks, any of which could cause an investor to lose money.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;b&gt;Lack of Governmental Insurance or Guarantee.&lt;/b&gt; An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">Keep in mind that future performance (both before and after taxes) may differ from past performance.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">www.schwabfunds.com/prospectus</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member">Best quarter:</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member">2002-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0324</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member">Worst quarter:</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member">2008-03-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">-0.0158</rr:BarChartLowestQuarterlyReturn>
  <rr:YearToDateReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member">Year-to-date performance</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartYearToDateReturn contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">0.0173</rr:BarChartYearToDateReturn>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006809_MemberC000018437_Member" decimals="4" unitRef="pure">-0.0033</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;b&gt;To pursue its goal, the fund primarily invests in a diversified portfolio of debt instruments that is designed to track the performance of the Barclays U.S. Government/Credit: 1-5 Years Index. &lt;/b&gt;The fund uses the index as a guide in structuring the fund&amp;#8217;s portfolio and selecting its investments. However, the fund is not required to invest any percentage of its assets in the securities represented in the index. Under normal circumstances, the dollar-weighted average maturity of the fund&amp;#8217;s portfolio is not expected to exceed three years.&lt;br/&gt;&lt;br/&gt; The fund normally invests at least 80% of its net assets in debt instruments of varying maturities. The fund will notify its shareholders at least 60 days before changing this policy. The fund invests primarily in investment grade instruments. The fund may invest in fixed-, variable- or floating-rate debt instruments. The fund also may invest in debt instruments of domestic and foreign issuers.&lt;br/&gt;&lt;br/&gt; The fund may lend its securities to certain financial institutions to earn additional income. The fund may also invest in derivative instruments, principally futures contracts. The fund typically uses futures as a substitute for taking a position in the underlying asset or as a part of a strategy designed to reduce exposure to other risks.&lt;br/&gt;&lt;br/&gt; The fund may buy and sell portfolio securities actively. If it does, its portfolio turnover rate and transaction costs will rise, which may lower fund performance and increase the likelihood of capital gain distributions.</rr:StrategyNarrativeTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleShareholderFeesSchwabShort-TermBondMarketFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualFundOperatingExpensesSchwabShort-TermBondMarketFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleExpenseExampleTransposedSchwabShort-TermBondMarketFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualTotalReturnsSchwabShort-TermBondMarketFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">The fund is subject to risks, any of which could cause an investor to lose money. The fund&amp;#8217;s principal risks include:&lt;br/&gt;&lt;br/&gt;  &lt;b&gt;Market Risk.&amp;nbsp;&lt;/b&gt;Bond markets rise and fall daily. As with any investment whose performance is tied to these markets, the value of your investment in the fund will fluctuate, which means that you could lose money.&lt;br/&gt;&lt;br/&gt;  &lt;b&gt;Investment Style Risk.&amp;nbsp;&lt;/b&gt;The fund invests in securities of the short-term bond market, as measured by the index. The fund is designed to follow the performance of the index during upturns as well as downturns. As a result, the fund will not take steps to reduce market exposure or lessen the effects of a declining market.&lt;br/&gt;&lt;br/&gt;  &lt;b&gt;Tracking Error Risk.&amp;nbsp;&lt;/b&gt;The fund is designed to track the performance of its benchmark index, although it may not be successful in doing so. The divergence between the performance of a fund and its benchmark index, positive or negative, is called &amp;#8220;tracking error.&amp;#8221; Tracking error can be caused by many factors and it may be significant. For example, the fund is not required to invest any percentage of its assets in securities represented in its benchmark index and may not invest in certain securities in the benchmark index, or match the securities&amp;#8217; weightings to the benchmark, due to regulatory, operational, custodial or liquidity constraints; corporate transactions; asset valuations; transaction costs and timing; tax considerations; and index rebalancing, which may result in tracking error.&lt;br/&gt;&lt;br/&gt;  &lt;b&gt;Interest Rate Risk.&amp;nbsp;&lt;/b&gt;Interest rates will rise and fall over time. During periods when interest rates are low, the fund&amp;#8217;s yield and total return also may be low. Changes in interest rates also may affect the fund&amp;#8217;s share price: a sharp rise in interest rates could cause the fund&amp;#8217;s share price to fall. The longer the fund&amp;#8217;s duration, the more sensitive to interest rate movements its share price is likely to be.&lt;br/&gt;&lt;br/&gt;  &lt;b&gt;Credit Risk.&amp;nbsp;&lt;/b&gt;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 or guarantor of a portfolio investment fails to make timely principal or interest payments or otherwise honor its obligations.&lt;br/&gt;&lt;br/&gt;  &lt;b&gt;Liquidity Risk.&amp;nbsp;&lt;/b&gt;A particular investment may be difficult to purchase or sell. The fund may be unable to sell a security at an advantageous time or price.&lt;br/&gt;&lt;br/&gt;  &lt;b&gt;Derivatives Risk.&amp;nbsp;&lt;/b&gt;The fund&amp;#8217;s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments and could cause the fund to lose more than the principal amount invested. In addition, investments in derivatives may involve leverage, which means a small percentage of assets invested in derivatives can have a disproportionately large impact on the fund. However, these risks are less severe when the fund uses derivatives for hedging rather than to enhance the fund&amp;#8217;s returns or as a substitute for a position or security.&lt;br/&gt;&lt;br/&gt;  &lt;b&gt;Foreign Investment Risk.&amp;nbsp;&lt;/b&gt;The fund&amp;#8217;s investments in securities of foreign issuers may involve certain risks that are greater than those associated with investments in securities of U.S. issuers. These include: risks of adverse changes in foreign economic, political, regulatory and other conditions; changes in currency exchange rates or exchange control regulations (including limitations on currency movements and exchanges); differing accounting, auditing, financial reporting and legal standards and practices; differing securities market structures; and higher transaction costs.&lt;br/&gt;&lt;br/&gt;  &lt;b&gt;Leverage Risk.&amp;nbsp;&lt;/b&gt;Certain fund transactions, such as derivatives, may give rise to a form of leverage and may expose the fund to greater risk. Leverage tends to magnify the effect of any decrease or increase in the value of the fund&amp;#8217;s portfolio securities. The use of leverage may cause the fund to liquidate portfolio positions when it would not be advantageous to do so in order to satisfy its obligations.&lt;br/&gt;&lt;br/&gt;  &lt;b&gt;Securities Lending Risk.&amp;nbsp;&lt;/b&gt;Securities lending involves the risk of loss of rights in the collateral or delay in recovery of the collateral if the borrower fails to return the security loaned or becomes insolvent.&lt;br/&gt;&lt;br/&gt;  &lt;b&gt;Lack of Governmental Insurance or Guarantee.&amp;nbsp;&lt;/b&gt;An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.&lt;br/&gt;&lt;br/&gt;  For more information on the risks of investing in the fund please see the &amp;#8220;Fund details&amp;#8221; section in the prospectus.</rr:RiskNarrativeTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedSchwabShort-TermBondMarketFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleShareholderFeesSchwabTreasuryInflationProtectedSecuritiesFund column period compact * ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualFundOperatingExpensesSchwabTreasuryInflationProtectedSecuritiesFund column period compact * ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleExpenseExampleTransposedSchwabTreasuryInflationProtectedSecuritiesFund column period compact * ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedSchwabTreasuryInflationProtectedSecuritiesFund column period compact * ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleShareholderFeesSchwabPremierIncomeFund column period compact * ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualFundOperatingExpensesSchwabPremierIncomeFund column period compact * ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleExpenseExampleTransposedSchwabPremierIncomeFund column period compact * ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleShareholderFeesSchwabTax-FreeBondFund column period compact * ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualFundOperatingExpensesSchwabTax-FreeBondFund column period compact * ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleExpenseExampleTransposedSchwabTax-FreeBondFund column period compact * ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedSchwabTax-FreeBondFund column period compact * ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:ShareholderFeeOther contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="INF" unitRef="USD">0</rr:ShareholderFeeOther>
  <rr:ManagementFeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.003</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0029</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0059</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">-0.001</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" id="Item_3" unitRef="pure">0.0049</rr:NetExpensesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="INF" unitRef="USD">50</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="INF" unitRef="USD">157</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="INF" unitRef="USD">274</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="INF" unitRef="USD">616</rr:ExpenseExampleYear10>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0957</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0957</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0743</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberBarclaysSevenYearMunicipalBondIndex_Member" decimals="4" unitRef="pure">0.1014</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0522</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0522</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0504</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberBarclaysSevenYearMunicipalBondIndex_Member" decimals="4" unitRef="pure">0.0638</rr:AverageAnnualReturnYear05>
  <rr:ShareholderFeeOther contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="INF" unitRef="USD">0</rr:ShareholderFeeOther>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0523</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0523</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0509</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberBarclaysSevenYearMunicipalBondIndex_Member" decimals="4" unitRef="pure">0.0563</rr:AverageAnnualReturnYear10>
  <rr:ShareholderFeeOther contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="INF" unitRef="USD">0</rr:ShareholderFeeOther>
  <rr:ManagementFeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.003</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0034</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0064</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">-0.0035</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" id="Item_4" unitRef="pure">0.0029</rr:NetExpensesOverAssets>
  <rr:PerformanceTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedSchwabCaliforniaTax-FreeBondFund column period compact * ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:ExpenseExampleYear01 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="INF" unitRef="USD">30</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="INF" unitRef="USD">93</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="INF" unitRef="USD">163</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="INF" unitRef="USD">368</rr:ExpenseExampleYear10>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleShareholderFeesSchwabGNMAFund column period compact * ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualFundOperatingExpensesSchwabGNMAFund column period compact * ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleExpenseExampleTransposedSchwabGNMAFund column period compact * ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedSchwabGNMAFund column period compact * ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.128</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.1114</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0831</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberBarclaysUsTipsIndex_Member" decimals="4" unitRef="pure">0.1356</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0717</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0582</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0536</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberBarclaysUsTipsIndex_Member" decimals="4" unitRef="pure">0.0795</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0661</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0521</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0484</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberBarclaysUsTipsIndex_Member" decimals="4" unitRef="pure">0.0738</rr:AverageAnnualReturnSinceInception>
  <rr:ManagementFeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.003</rr:ManagementFeesOverAssets>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleShareholderFeesSchwabTotalBondMarketFund column period compact * ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualFundOperatingExpensesSchwabTotalBondMarketFund column period compact * ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleExpenseExampleTransposedSchwabTotalBondMarketFund column period compact * ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedSchwabTotalBondMarketFund column period compact * ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.0032</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.0062</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">-0.0017</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" id="Item_5" unitRef="pure">0.0045</rr:NetExpensesOverAssets>
  <rr:ExpenseExampleYear01 contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="INF" unitRef="USD">46</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="INF" unitRef="USD">144</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="INF" unitRef="USD">252</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="INF" unitRef="USD">567</rr:ExpenseExampleYear10>
  <rr:AnnualReturn2011 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0957</rr:AnnualReturn2011>
  <rr:AnnualReturn2010 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0333</rr:AnnualReturn2010>
  <rr:AnnualReturn2009 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.1171</rr:AnnualReturn2009>
  <rr:AnnualReturn2008 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0037</rr:AnnualReturn2008>
  <rr:AnnualReturn2007 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0161</rr:AnnualReturn2007>
  <rr:AnnualReturn2006 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0395</rr:AnnualReturn2006>
  <rr:AnnualReturn2005 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0206</rr:AnnualReturn2005>
  <rr:AnnualReturn2004 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.04</rr:AnnualReturn2004>
  <rr:AnnualReturn2003 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0547</rr:AnnualReturn2003>
  <rr:AnnualReturn2002 contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.109</rr:AnnualReturn2002>
  <rr:ShareholderFeeOther contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="INF" unitRef="USD">0</rr:ShareholderFeeOther>
  <rr:ManagementFeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0029</rr:ManagementFeesOverAssets>
  <rr:ObjectiveHeading contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;b&gt;Investment objective &lt;/b&gt;</rr:ObjectiveHeading>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0031</rr:OtherExpensesOverAssets>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">The fund seeks high current income exempt from federal and California personal income tax that is consistent with capital preservation.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.006</rr:ExpensesOverAssets>
  <rr:ExpenseHeading contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;b&gt;Fund fees and expenses &lt;/b&gt;</rr:ExpenseHeading>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">-0.0005</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">This table describes the fees and expenses you may pay if you buy and hold shares of the fund.</rr:ExpenseNarrativeTextBlock>
  <rr:NetExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" id="Item_6" unitRef="pure">0.0055</rr:NetExpensesOverAssets>
  <rr:ShareholderFeesCaption contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">Shareholder fees (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:ShareholderFeeOther contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="INF" unitRef="USD">0</rr:ShareholderFeeOther>
  <rr:ExpenseExampleYear01 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="INF" unitRef="USD">56</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="INF" unitRef="USD">176</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="INF" unitRef="USD">307</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="INF" unitRef="USD">689</rr:ExpenseExampleYear10>
  <rr:AnnualReturn2004 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0337</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0264</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0382</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0793</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0603</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0571</rr:AnnualReturn2009>
  <rr:ManagementFeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.003</rr:ManagementFeesOverAssets>
  <rr:AnnualReturn2010 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0561</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.077</rr:AnnualReturn2011>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0029</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0059</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">-0.001</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" id="Item_7" unitRef="pure">0.0049</rr:NetExpensesOverAssets>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.077</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0629</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0505</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberBarclaysGnmaIndex_Member" decimals="4" unitRef="pure">0.079</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0659</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0505</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0474</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberBarclaysGnmaIndex_Member" decimals="4" unitRef="pure">0.0695</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0497</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0344</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0334</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberBarclaysGnmaIndex_Member" decimals="4" unitRef="pure">0.0553</rr:AverageAnnualReturnSinceInception>
  <rr:ExpenseExampleHeading contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">Example</rr:ExpenseExampleHeading>
  <rr:ObjectiveHeading contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;b&gt;Investment objective &lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">The fund seeks to provide total return and inflation protection.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;b&gt;Fund fees and expenses &lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">This table describes the fees and expenses you may pay if you buy and hold shares of the fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">Shareholder fees (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">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&amp;#8217;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.</rr:ExpenseExampleNarrativeTextBlock>
  <rr:OperatingExpensesCaption contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">Annual fund operating expenses (expenses that you pay each year&lt;br/&gt; as a % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">Example</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">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&amp;#8217;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.</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">Portfolio turnover</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the fund&amp;#8217;s performance. During the most recent fiscal year, the fund&amp;#8217;s portfolio turnover rate was 32% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;b&gt;Principal investment strategies &lt;/b&gt;</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;b&gt;Principal risks &lt;/b&gt;</rr:RiskHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;b&gt;Performance &lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index. 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 (both before and after taxes) may differ from past performance. For current performance information, please see www.schwabfunds.com/prospectus. On August 10, 2009, the Investor Share class and Select Share class were combined into a single class of shares of the fund, and the fund no longer offers multiple classes of shares. The performance history of the fund is that of the fund&amp;#8217;s former Select Shares. Accordingly, the past performance information of the fund&amp;#8217;s former Select Shares is shown below.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">Annual total returns (%) as of 12/31</rr:BarChartHeading>
  <rr:PerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">Average annual total returns (%) as of &lt;br/&gt;12/31/11</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">Schwab Tax-Free Bond Fund&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;TM&lt;/sup&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;b&gt;Investment objective &lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">The fund seeks high current income that is exempt from federal income tax, consistent with capital preservation.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;b&gt;Fund fees and expenses &lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">This table describes the fees and expenses you may pay if you buy and hold shares of the fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">Shareholder fees (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">Annual fund operating expenses (expenses that you pay each year &lt;br/&gt;as a % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">Example</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">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&amp;#8217;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.</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">Portfolio turnover</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the fund&amp;#8217;s performance. During the most recent fiscal year, the fund&amp;#8217;s portfolio turnover rate was 102% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;b&gt;Principal investment strategies &lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;b&gt;To pursue its goal, the fund primarily invests in investment-grade municipal securities &amp;#8212; those in the four highest credit rating categories (rated AAA to BBB- or the unrated equivalent as determined by the investment adviser).&lt;/b&gt; The fund normally invests at least 80% of its net assets in municipal securities the interest from which is exempt from federal income tax, including the federal alternative minimum tax (AMT). The fund does not currently intend to invest in municipal securities whose interest is subject to the AMT; however, this would not prevent the fund from investing in such securities as a temporary defensive measure discussed below.  &lt;br /&gt;&lt;br /&gt;The fund may invest in fixed-, variable- or floating-rate securities from municipal issuers around the country and in U.S. territories and possessions. These may include general obligation issues, which typically are backed by the issuer&amp;#8217;s ability to levy taxes, and revenue issues, which typically are backed by a stream of revenue from a given source, such as an electric utility or a public water system. 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 and utilities and may also invest in municipal notes. Many of the fund&amp;#8217;s securities carry credit enhancements (such as bond insurance) or liquidity enhancements (such as a letter of credit), which are designed to provide incremental levels of creditworthiness or liquidity.  &lt;br /&gt;&lt;br /&gt;In choosing securities, the fund&amp;#8217;s investment adviser seeks to maximize current income within the limits of the fund&amp;#8217;s credit and average maturity standards. The investment adviser&amp;#8217;s credit research department analyzes and monitors the securities that the fund owns or is considering buying. The fund may invest up to 15% of its assets in below investment grade bonds (sometimes called junk bonds) that are rated, at the time of investment, at least  B by at least one nationally recognized statistical rating organization or are the unrated equivalent as determined by the investment adviser. If a bond is downgraded below B or the unrated equivalent, the fund may continue to hold it unless the investment adviser determines the risk of holding the bond is unacceptable when compared to the bond&amp;#8217;s total return potential. The manager may adjust the fund&amp;#8217;s holdings or its average maturity based on actual or anticipated changes in interest rates or credit quality. &lt;br /&gt;&lt;br /&gt;The fund may also invest in derivative instruments, principally futures contracts. The fund typically uses futures as a substitute for taking a position in the underlying asset or as a part of a strategy designed to reduce exposure to other risks.  &lt;br /&gt;&lt;br /&gt;During unusual market conditions, the fund may invest entirely in taxable securities and municipal securities whose interest is subject to the AMT as a temporary defensive measure. When the fund engages in such activities, the fund would not be pursuing its investment strategy and, as a result, it may not achieve its investment objective.</rr:StrategyNarrativeTextBlock>
  <rr:AnnualReturn2007 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.1057</rr:AnnualReturn2007>
  <rr:RiskHeading contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;b&gt;Principal risks &lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">The fund is subject to risks, any of which could cause an investor to lose money. The fund&amp;#8217;s principal risks include:&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Market Risk.&lt;/b&gt; Bond markets rise and fall daily. As with any investment whose performance is tied to these markets, the value of your investment in the fund will fluctuate, which means that you could lose money.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Management Risk.&lt;/b&gt; As an actively managed mutual fund, the fund is subject to the risk that its investment adviser will make poor security selections. The fund&amp;#8217;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.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Investment Style Risk.&lt;/b&gt; The fund is not designed to offer substantial capital appreciation. In exchange for its goal of capital preservation, the fund may offer lower long-term performance than stock investments or certain other types of bond investments. The fund&amp;#8217;s emphasis on quality and preservation of capital also could cause it to underperform certain other types of bond investments, particularly those that take greater maturity and credit risks. At the same time, some of the fund&amp;#8217;s investments may have greater risks than securities in taxable bond funds.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Non-Diversification Risk.&lt;/b&gt; The fund is non-diversified and, as such, may invest a greater percentage of its assets in the securities of a single issuer than a fund that is diversified. A non-diversified fund is more susceptible to risks associated with a single economic, political or regulatory occurrence than a diversified fund.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Interest Rate Risk.&lt;/b&gt; Interest rates will rise and fall over time. During periods when interest rates are low, the fund&amp;#8217;s yield and total return also may be low. Changes in interest rates also may affect the fund&amp;#8217;s share price: a sharp rise in interest rates could cause the fund&amp;#8217;s share price to fall. The longer the fund&amp;#8217;s duration, the more sensitive to interest rate movements its share price is likely to be.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Credit Risk.&lt;/b&gt; 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 or guarantor of a portfolio investment fails to make timely principal or interest payments or otherwise honor its obligations.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; A particular investment may be difficult to purchase or sell. The fund may be unable to sell a security at an advantageous time or price.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;High Yield Risk.&lt;/b&gt; High yield securities and unrated securities of similar credit quality (sometimes called junk bonds) that the fund may invest in are subject to greater levels of credit and liquidity risks. High yield securities are considered primarily speculative with respect to the issuer&amp;#8217;s continuing ability to make principal and interest payments.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Leverage Risk.&lt;/b&gt; Certain fund transactions, such as derivatives, may give rise to a form of leverage and may expose the fund to greater risk. Leverage tends to magnify the effect of any decrease or increase in the value of the fund&amp;#8217;s portfolio securities. The use of leverage may cause the fund to liquidate portfolio positions when it would not be advantageous to do so in order to satisfy its obligations.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Prepayment and Extension Risk.&lt;/b&gt; The fund&amp;#8217;s investments are subject to the risk that the securities may be paid off earlier or later than expected. Either situation could cause the fund to hold securities paying lower-than-market rates of interest, which could hurt the fund&amp;#8217;s yield or share price.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Municipal Securities Risk.&lt;/b&gt; The fund primarily invests in municipal securities whose interest, in the opinion of the issuers&amp;#8217; counsel, is exempt from federal income tax and from the AMT. Neither the investment adviser nor the fund guarantees that this opinion is correct, and there is no assurance that the Internal Revenue Service (IRS) will agree with such counsel&amp;#8217;s opinion. If certain types of investments the fund buys as tax-exempt are later ruled to be taxable, a portion of the fund&amp;#8217;s income could be taxable. To the extent that the fund invests in municipal securities from a given state or geographic region, its 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. In addition, many municipal securities are issued to finance specific projects (especially those relating to education, health care, transportation and utilities) and conditions in those sectors can affect the overall municipal market. National governmental actions, such as the elimination of tax-exempt status or the reduction of financial support to municipalities, also could affect performance. Municipalities continue to experience difficulties in the current economic and political environment.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Derivatives Risk.&lt;/b&gt; The fund&amp;#8217;s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments and could cause the fund to lose more than the principal amount invested. In addition, investments in derivatives  may involve leverage, which means a small percentage of assets invested in derivatives can have a disproportionately large impact on the fund. However, these risks are less severe when the fund uses derivatives for hedging rather than to enhance the fund&amp;#8217;s returns or as a substitute for a position or security. &lt;br /&gt;&lt;br /&gt;&lt;b&gt;Taxable Investments.&lt;/b&gt; The fund may invest a portion of its assets in securities that generate income that is not exempt from federal income tax and, in addition, with respect to any temporary defensive investments by the fund, in securities whose interest is subject to the AMT. These investments could generate taxable income for shareholders.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Lack of Governmental Insurance or Guarantee.&lt;/b&gt; An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.  &lt;br /&gt;&lt;br /&gt;For more information on the risks of investing in the fund please see the &amp;#8220;Fund details&amp;#8221; section in the prospectus.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;b&gt;Performance &lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index. 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 (both before and after taxes) may differ from past performance. For current performance information, please see www.schwabfunds.com/prospectus.</rr:PerformanceNarrativeTextBlock>
  <rr:AnnualReturn2008 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">-0.0196</rr:AnnualReturn2008>
  <rr:BarChartHeading contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">Annual total returns (%) as of 12/31</rr:BarChartHeading>
  <rr:AnnualReturn2009 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0924</rr:AnnualReturn2009>
  <rr:BarChartClosingTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">Best quarter: 5.41% Q3 2002  &lt;br/&gt;Worst quarter: (2.91%) Q4 2010  &lt;br/&gt;Year-to-date performance (non-annualized and pre-tax) as of 9/30/12: 5.30%</rr:BarChartClosingTextBlock>
  <rr:AnnualReturn2010 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0582</rr:AnnualReturn2010>
  <rr:PerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">Average annual total returns (%) as of 12/31/11</rr:PerformanceTableHeading>
  <rr:AnnualReturn2011 contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.128</rr:AnnualReturn2011>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account. In some cases, the return after taxes may exceed the return before taxes due to an assumed benefit from any losses on a sale of shares at the end of the measurement period.</rr:PerformanceTableNarrativeTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member">2006-03-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006819_MemberC000018453_Member">2006-03-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006819_MemberC000018453_Member">2006-03-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberBarclaysUsTipsIndex_Member">2006-03-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AnnualReturn2011 contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.0563</rr:AnnualReturn2011>
  <rr:PortfolioTurnoverRate contextRef="Duration_16Dec2011_15Dec2012S000006815_Member" decimals="4" unitRef="pure">1.02</rr:PortfolioTurnoverRate>
  <rr:AnnualReturn2010 contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.0765</rr:AnnualReturn2010>
  <rr:RiskLoseMoney contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">The fund is subject to risks, any of which could cause an investor to lose money.</rr:RiskLoseMoney>
  <rr:AnnualReturn2009 contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.1434</rr:AnnualReturn2009>
  <rr:RiskNondiversifiedStatus contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;b&gt;Non-Diversification Risk.&lt;/b&gt; The fund is non-diversified and, as such, may invest a greater percentage of its assets in the securities of a single issuer than a fund that is diversified. A non-diversified fund is more susceptible to risks associated with a single economic, political or regulatory occurrence than a diversified fund.</rr:RiskNondiversifiedStatus>
  <rr:AnnualReturn2008 contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">-0.0224</rr:AnnualReturn2008>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;b&gt;Lack of Governmental Insurance or Guarantee.&lt;/b&gt; An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">Keep in mind that future performance (both before and after taxes) may differ from past performance.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">www.schwabfunds.com/prospectus</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member">Best quarter:</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member">2002-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.0541</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member">Worst quarter:</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member">2010-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">-0.0291</rr:BarChartLowestQuarterlyReturn>
  <rr:YearToDateReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member">Year-to-date performance</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartYearToDateReturn contextRef="Duration_16Dec2011_15Dec2012S000006815_MemberC000018447_Member" decimals="4" unitRef="pure">0.053</rr:BarChartYearToDateReturn>
  <rr:ExpenseExampleYear01 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="INF" unitRef="USD">50</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="INF" unitRef="USD">157</rr:ExpenseExampleYear03>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">The fund seeks high current income consistent with preservation of capital.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">This table describes the fees and expenses you may pay if you buy and hold shares of the fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseExampleYear05 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="INF" unitRef="USD">274</rr:ExpenseExampleYear05>
  <rr:RiskReturnHeading contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">Schwab GNMA Fund&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;TM&lt;/sup&gt;</rr:RiskReturnHeading>
  <rr:ExpenseExampleYear10 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="INF" unitRef="USD">616</rr:ExpenseExampleYear10>
  <rr:ObjectiveHeading contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;b&gt;Investment objective &lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ExpenseHeading contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;b&gt;Fund fees and expenses &lt;/b&gt;</rr:ExpenseHeading>
  <rr:YearToDateReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member">Year-to-date performance</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturn contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.0322</rr:BarChartYearToDateReturn>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member">Best quarter:</rr:HighestQuarterlyReturnLabel>
  <rr:PortfolioTurnoverHeading contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">Portfolio turnover</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the fund&amp;#8217;s performance. During the most recent fiscal year, the fund&amp;#8217;s portfolio turnover rate was 101% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:StrategyHeading contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;b&gt;Principal investment strategies &lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;b&gt;To pursue its goal, the fund normally invests at least 80% of its net assets in Treasury inflation-protected fixed income securities.&lt;/b&gt; The fund will notify its shareholders at least 60 days before changing this policy.&lt;br/&gt;&lt;br/&gt;Inflation-protected securities are fixed income securities that are structured to provide protection against inflation. The value of the bond&amp;#8217;s principal or the interest paid on the bond is adjusted to track changes (up or down) in an official inflation measure. The U.S. Treasury, the largest domestic issuer of inflation-protected securities (i.e., Treasury Inflation Protected Securities (TIPS)), currently uses the non-seasonally adjusted U.S. City Average All Items Consumer Price Index for all Urban Consumers (CPI-U), published monthly by the Bureau of Labor Statistics, as its inflation measure. Inflation protected bonds issued by U.S. corporations are generally adjusted to reflect a comparable measure of inflation determined by that government or corporation.&lt;br/&gt;&lt;br/&gt;The fund may invest in inflation-protected fixed income securities of any type, including those issued by the U.S. Government and its agencies and instrumentalities and U.S. corporations. The fund may invest in inflation-protected fixed income securities with effective or final maturities of any length. The fund also may invest in derivative instruments, principally futures contracts. The fund typically uses futures as a substitute for taking a position in the underlying security or as part of an overall strategy designed to reduce the fund&amp;#8217;s risk exposure. In addition, the fund may invest in other financial instruments or use other investment techniques to seek to obtain market exposure to the securities in which it may invest.&lt;br/&gt;&lt;br/&gt;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. When the fund engages in such activities, the fund would not be pursuing its investment strategy and, as a result, it may not achieve its investment goal.&lt;br/&gt;&lt;br/&gt;The fund may buy and sell portfolio securities actively. If it does, its portfolio turnover rate and transaction costs will rise, which may lower fund performance and increase the likelihood of capital gain distributions.</rr:StrategyNarrativeTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">The fund is subject to risks, any of which could cause an investor to lose money. The fund&amp;#8217;s principal risks include:&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Market Risk.&lt;/b&gt; Bond markets rise and fall daily. As with any investment whose performance is tied to these markets, the value of your investment in the fund will fluctuate, which means that you could lose money.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Management Risk.&lt;/b&gt; As an actively managed mutual fund, the fund is subject to the risk that its investment adviser will make poor security selections. The fund&amp;#8217;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.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Inflation Protected Security Risk.&lt;/b&gt; The value of inflation protected securities, including TIPS, generally will fluctuate in response to changes in &amp;#8220;real&amp;#8221; interest rates, generally decreasing when real interest rates rise and increasing when real interest rates fall. In addition, interest payments on inflation-indexed securities will generally vary up or down along with the rate of inflation.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Interest Rate Risk.&lt;/b&gt; Interest rates will rise and fall over time. During periods when interest rates are low, the fund&amp;#8217;s yield and total return also may be low. Changes in interest rates also may affect the fund&amp;#8217;s share price: a sharp rise in interest rates could cause the fund&amp;#8217;s share price to fall. The longer the fund&amp;#8217;s duration, the more sensitive to interest rate movements its share price is likely to be.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Credit Risk.&lt;/b&gt; 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 or guarantor of a portfolio investment fails to make timely principal or interest payments or otherwise honor its obligations.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; A particular investment may be difficult to purchase or sell. The fund may be unable to sell a security at an advantageous time or price.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Derivatives Risk.&lt;/b&gt; The fund&amp;#8217;s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments and could cause the fund to lose more than the principal amount invested. In addition, investments in derivatives may involve leverage, which means a small percentage of assets invested in derivatives can have a disproportionately large impact on the fund. However, these risks are less severe when the fund uses derivatives for hedging rather than to enhance the fund&amp;#8217;s returns or as a substitute for a position or security.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Leverage Risk.&lt;/b&gt; Certain fund transactions, such as derivatives, may give rise to a form of leverage and may expose the fund to greater risk. Leverage tends to magnify the effect of any decrease or increase in the value of the fund&amp;#8217;s portfolio securities. The use of leverage may cause the fund to liquidate portfolio positions when it would not be advantageous to do so in order to satisfy its obligations.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Lack of Governmental Insurance or Guarantee.&lt;/b&gt; An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.&lt;br/&gt;&lt;br/&gt;For more information on the risks of investing in the fund please see the &amp;#8220;Fund details&amp;#8221; section in the prospectus.</rr:RiskNarrativeTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">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&amp;#8217;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.</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">Shareholder fees (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">Annual fund operating expenses (expenses that you pay each year&lt;br /&gt; as a % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:PortfolioTurnoverRate contextRef="Duration_16Dec2011_15Dec2012S000006819_Member" decimals="4" unitRef="pure">0.32</rr:PortfolioTurnoverRate>
  <rr:ExpenseExampleHeading contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">Example</rr:ExpenseExampleHeading>
  <rr:RiskLoseMoney contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">The fund is subject to risks, any of which could cause an investor to lose money.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;b&gt;Lack of Governmental Insurance or Guarantee.&lt;/b&gt; An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">The bar chart below 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 compared to that of an index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;b&gt;To pursue its goal, the fund primarily invests in investment-grade municipal securities &amp;#8212; those in the four highest credit rating categories (rated AAA to BBB- or the unrated equivalent as determined by the investment adviser) from California issuers.&lt;/b&gt; The fund normally invests at least 80% of its net assets in municipal securities the interest from which is exempt from federal and California personal income tax and federal alternative minimum tax (AMT). The fund does not currently intend to invest in municipal securities whose interest is subject to the AMT; however, this would not prevent the fund from investing in such securities as a temporary defensive measure discussed below.&lt;br/&gt;&lt;br/&gt;The fund may invest in securities from municipal issuers in California and in U.S. territories and possessions. These may include general obligation issues, which typically are backed by the issuer&amp;#8217;s ability to levy taxes, and revenue issues, which typically are backed by a stream of revenue from a given source, such as an electric utility or a public water system. 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 and utilities and may also invest in municipal notes. Many of the fund&amp;#8217;s securities carry credit enhancements (such as bond insurance) or liquidity enhancements (such as a letter of credit), which are designed to provide incremental levels of creditworthiness or liquidity.&lt;br/&gt;&lt;br/&gt;In choosing securities, the fund&amp;#8217;s investment adviser seeks to maximize current income within the limits of the fund&amp;#8217;s credit and average maturity standards. The investment adviser&amp;#8217;s credit research department analyzes and monitors the securities that the fund owns or is considering buying. The fund may invest up to 15% of its assets in below investment grade bonds (sometimes called junk bonds) that are rated, at the time of investment, at least  B by at least one nationally recognized statistical rating organization or are the unrated equivalent as determined by the investment adviser. If a bond is downgraded below B or the unrated equivalent, the fund may continue to hold it unless the investment adviser determines the risk of holding the bond is unacceptable when compared to the bond&amp;#8217;s total return potential. The investment adviser may adjust the fund&amp;#8217;s holdings or its average maturity based on actual or anticipated changes in interest rates or credit quality.&lt;br/&gt;&lt;br/&gt;The fund may also invest in derivative instruments, principally futures contracts. The fund typically uses futures as a substitute for taking a position in the underlying asset or as a part of a strategy designed to reduce exposure to other risks.&lt;br/&gt;&lt;br/&gt;During unusual market conditions, the fund may invest entirely in taxable securities and municipal securities whose interest is subject to the AMT as a temporary defensive measure. When the fund engages in such activities, the fund would not be pursuing its investment strategy and, as a result, it may not achieve its investment objective.&lt;br/&gt;&lt;br/&gt;</rr:StrategyNarrativeTextBlock>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">Keep in mind that future performance (both before and after taxes) may differ from past performance.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">www.schwabfunds.com/prospectus</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:RiskHeading contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;b&gt;Principal risks &lt;/b&gt;</rr:RiskHeading>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:BarChartClosingTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">Best quarter: 5.12% Q1 2008&lt;br/&gt;Worst quarter: (3.53%) Q3 2008&lt;br/&gt;Year-to-date performance (non-annualized and pre-tax) as of 9/30/12: 6.00%</rr:BarChartClosingTextBlock>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member">2009-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the fund&amp;#8217;s performance. During the most recent fiscal year, the fund&amp;#8217;s portfolio turnover rate was 567% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member">Year-to-date performance</rr:YearToDateReturnLabel>
  <rr:PortfolioTurnoverHeading contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">Portfolio turnover</rr:PortfolioTurnoverHeading>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartYearToDateReturn contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.06</rr:BarChartYearToDateReturn>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member">Best quarter:</rr:HighestQuarterlyReturnLabel>
  <rr:StrategyHeading contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;b&gt;Principal investment strategies &lt;/b&gt;</rr:StrategyHeading>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member">2008-03-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">0.0512</rr:BarChartHighestQuarterlyReturn>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member">Worst quarter:</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualTotalReturnsSchwabTax-FreeBondFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member">2008-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006819_MemberC000018453_Member" decimals="4" unitRef="pure">-0.0353</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.0604</rr:BarChartHighestQuarterlyReturn>
  <rr:RiskReturnHeading contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">Schwab Total Bond Market Fund&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;TM&lt;/sup&gt;</rr:RiskReturnHeading>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member">Worst quarter:</rr:LowestQuarterlyReturnLabel>
  <rr:ObjectiveHeading contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;b&gt;Investment objective &lt;/b&gt;</rr:ObjectiveHeading>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member">2008-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">-0.017</rr:BarChartLowestQuarterlyReturn>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">The fund seeks high current income by tracking the performance of the Barclays U.S. Aggregate Bond Index.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;b&gt;Fund fees and expenses &lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">This table describes the fees and expenses you may pay if you buy and hold shares of the fund.</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">Shareholder fees (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">Annual fund operating expenses (expenses that you pay each year&lt;br/&gt; as a % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:PortfolioTurnoverHeading contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">Portfolio turnover</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the fund&amp;#8217;s performance. During the most recent fiscal year, the fund&amp;#8217;s portfolio turnover rate was 160% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">Schwab&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;&amp;#174;&lt;/sup&gt; Treasury Inflation Protected Securities Fund</rr:RiskReturnHeading>
  <rr:ExpenseExampleHeading contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">Example</rr:ExpenseExampleHeading>
  <rr:ObjectiveHeading contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;b&gt;Investment objective &lt;/b&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">The fund seeks total return.</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;b&gt;Fund fees and expenses &lt;/b&gt;</rr:ExpenseHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">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&amp;#8217;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.</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">This table describes the fees and expenses you may pay if you buy and hold shares of the fund.</rr:ExpenseNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;b&gt;Principal investment strategies &lt;/b&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;b&gt;To pursue its goal, the fund primarily invests in a diversified portfolio of debt instruments that is designed to track the performance of the Barclays U.S. Aggregate Bond Index.&lt;/b&gt; The fund uses the index as a guide in structuring the fund&amp;#8217;s portfolio and selecting its investments. However, the fund is not required to invest any percentage of its assets in the securities represented in the index.  &lt;br /&gt;&lt;br /&gt; The fund normally invests at least 80% of its net assets in debt instruments of varying maturities. The fund will notify its shareholders at least 60 days before changing this policy. The fund invests primarily in investment grade instruments. The fund may invest in fixed-, variable- or floating-rate debt instruments. The fund also may invest in debt instruments of domestic and foreign issuers, including mortgage-backed or asset-backed securities.  &lt;br /&gt;&lt;br /&gt; The fund may also invest in derivative instruments, principally futures contracts. The fund typically uses futures as a substitute for taking a position in the underlying asset or as a part of a strategy designed to reduce exposure to other risks.  &lt;br /&gt;&lt;br /&gt; The fund may lend its securities to certain financial institutions to earn additional income. The fund also may seek to obtain market exposure to the instruments in which it invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as mortgage dollar rolls).  &lt;br /&gt;&lt;br /&gt; The fund may buy and sell portfolio securities actively. If it does, its portfolio turnover rate and transaction costs will rise, which may lower fund performance and increase the likelihood of capital gain distributions.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;b&gt;Principal risks&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">The fund is subject to risks, any of which could cause an investor to lose money. The fund&amp;#8217;s principal risks include:&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Market Risk.&lt;/b&gt; Bond markets rise and fall daily. As with any investment whose performance is tied to these markets, the value of your investment in the fund will fluctuate, which means that you could lose money.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Investment Style Risk.&lt;/b&gt; The fund invests in securities of the bond market, as measured by the index. The fund is designed to follow the performance of the index during upturns as well as downturns. As a result, the fund will not take steps to reduce market exposure or lessen the effects of a declining market.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Tracking Error Risk. &lt;/b&gt; The fund is designed to track the performance of its benchmark index, although it may not be successful in doing so. The divergence between the performance of a fund and its benchmark index, positive or negative, is called &amp;#8220;tracking error.&amp;#8221; Tracking error can be caused by many factors and it may be significant. For example, the fund is not required to invest any percentage of its assets in securities represented in its benchmark index and may not invest in certain securities in the benchmark index, or match the securities&amp;#8217; weightings to the benchmark, due to regulatory, operational, custodial or liquidity constraints; corporate transactions; asset valuations; transaction costs and timing; tax considerations; and index rebalancing, which may result in tracking error.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Interest Rate Risk.&lt;/b&gt; Interest rates will rise and fall over time. During periods when interest rates are low, the fund&amp;#8217;s yield and total return also may be low. Changes in interest rates also may affect the fund&amp;#8217;s share price: a sharp rise in interest rates could cause the fund&amp;#8217;s share price to fall. The longer the fund&amp;#8217;s duration, the more sensitive to interest rate movements its share price is likely to be.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Credit Risk.&lt;/b&gt; 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 or guarantor of a portfolio investment fails to make timely principal or interest payments or otherwise honor its obligations.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Liquidity Risk.&lt;/b&gt; A particular investment may be difficult to purchase or sell. The fund may be unable to sell a security at an advantageous time or price.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Prepayment and Extension Risk.&lt;/b&gt; The fund&amp;#8217;s investments are subject to the risk that the securities may be paid off earlier or later than expected. Either situation could cause the fund to hold securities paying lower-than-market rates of interest, which could hurt the fund&amp;#8217;s yield or share price.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Derivatives Risk.&lt;/b&gt; The fund&amp;#8217;s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments and could cause the fund to lose more than the principal amount invested. In addition, investments in derivatives may involve leverage, which means a small percentage of assets invested in derivatives can have a disproportionately large impact on the fund. However, these risks are less severe when the fund uses derivatives for hedging rather than to enhance the fund&amp;#8217;s returns or as a substitute for a position or security.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Foreign Investment Risk. &lt;/b&gt; The fund&amp;#8217;s investments in securities of foreign issuers may involve certain risks that are greater than those associated with investments in securities of U.S. issuers. These include: risks of adverse changes in foreign economic, political, regulatory and other conditions; changes in currency exchange rates or exchange control regulations (including limitations on currency movements and exchanges); differing accounting, auditing, financial reporting and legal standards and practices; differing securities market structures; and higher transaction costs.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Mortgage Dollar Rolls Risk.&lt;/b&gt; Mortgage dollar rolls are transactions in which the fund sells mortgage-backed securities to a dealer and simultaneously agrees to repurchase similar securities in the future at a predetermined price. The fund&amp;#8217;s mortgage dollar rolls could lose money if the price of the mortgage-backed securities sold falls below the agreed upon repurchase price, or if the counterparty is unable to honor the agreement.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Leverage Risk.&lt;/b&gt; Certain fund transactions, such as derivatives and mortgage dollar rolls, may give rise to a form of leverage and may expose the fund to greater risk. Leverage tends to magnify the effect of any decrease or increase in the value of the fund&amp;#8217;s portfolio securities. The use of leverage may cause the fund to liquidate portfolio positions when it would not be advantageous to do so in order to satisfy its obligations.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Securities Lending Risk.&lt;/b&gt; Securities lending involves the risk of loss of rights in the collateral or delay in recovery of the collateral if the borrower fails to return the security loaned or becomes insolvent.&lt;br /&gt;&lt;br /&gt; &lt;b&gt;Lack of Governmental Insurance or Guarantee.&lt;/b&gt; An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.  &lt;br /&gt;&lt;br /&gt; For more information on the risks of investing in the fund please see the &amp;#8220;Fund details&amp;#8221; section in the prospectus.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;b&gt;Performance &lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">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&amp;#8217;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.</rr:ExpenseExampleNarrativeTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualTotalReturnsSchwabTreasuryInflationProtectedSecuritiesFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index. 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 (both before and after taxes) may differ from past performance. For current performance information, please see www.schwabfunds.com/prospectus.</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">Annual total returns (%) as of 12/31</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">Best quarter: 4.28% Q3 2002&lt;br/&gt;Worst quarter: (2.20%) Q1 2008 &lt;br/&gt;Year-to-date performance (non-annualized and pre-tax) as of 9/30/12: 3.80%</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">Average annual total returns (%) as of 12/31/11</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNarrativeTextBlock>
  <rr:PortfolioTurnoverHeading contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">Portfolio turnover</rr:PortfolioTurnoverHeading>
  <rr:PortfolioTurnoverRate contextRef="Duration_16Dec2011_15Dec2012S000006810_Member" decimals="4" unitRef="pure">1.6</rr:PortfolioTurnoverRate>
  <rr:RiskLoseMoney contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">The fund is subject to risks, any of which could cause an investor to lose money.</rr:RiskLoseMoney>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;b&gt;Lack of Governmental Insurance or Guarantee.&lt;/b&gt; An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PortfolioTurnoverTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">The fund pays transaction costs, such as commissions, when it buys and sells securities (or &amp;#8220;turns over&amp;#8221; its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the fund&amp;#8217;s performance. During the most recent fiscal year, the fund&amp;#8217;s portfolio turnover rate was 304% of the average value of its portfolio.</rr:PortfolioTurnoverTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">www.schwabfunds.com/prospectus</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:StrategyHeading contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;b&gt;Principal investment strategies &lt;/b&gt;</rr:StrategyHeading>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">Keep in mind that future performance (both before and after taxes) may differ from past performance.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index. 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 (both before and after taxes) may differ from past performance. For current performance information, please see www.schwabfunds.com/prospectus. On August 10, 2009, the Investor Share class and Select Share class were combined into a single class of shares of the fund, and the fund no longer offers multiple classes of shares. The performance history of the fund is that of the fund&amp;#8217;s former Select Shares. Accordingly, the past performance information of the fund&amp;#8217;s former Select Shares is shown below.</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNarrativeTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">The fund is subject to risks, any of which could cause an investor to lose money. The fund&amp;#8217;s principal risks include:&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Market Risk.&lt;/b&gt; Bond markets rise and fall daily. As with any investment whose performance is tied to these markets, the value of your investment in the fund will fluctuate, which means that you could lose money.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Management Risk.&lt;/b&gt; As an actively managed mutual fund, the fund is subject to the risk that its investment adviser will make poor security selections. The fund&amp;#8217;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.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Investment Style Risk.&lt;/b&gt; The fund is not designed to offer substantial capital appreciation. In exchange for its goal of capital preservation, the fund may offer lower long-term performance than stock investments or certain other types of bond investments. The fund&amp;#8217;s emphasis on quality and preservation of capital also could cause it to underperform certain other types of bond investments, particularly those that take greater maturity and credit risks. At the same time, some of the fund&amp;#8217;s investments may have greater risks than securities in taxable bond funds.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Non-Diversification Risk.&lt;/b&gt; The fund is non-diversified and, as such, may invest a greater percentage of its assets in the securities of a single issuer than a fund that is diversified. A non-diversified fund is more susceptible to risks associated with a single economic, political or regulatory occurrence than a diversified fund.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Interest Rate Risk.&lt;/b&gt; Interest rates will rise and fall over time. During periods when interest rates are low, the fund&amp;#8217;s yield and total return also may be low. Changes in interest rates also may affect the fund&amp;#8217;s share price: a sharp rise in interest rates could cause the fund&amp;#8217;s share price to fall. The longer the fund&amp;#8217;s duration, the more sensitive to interest rate movements its share price is likely to be.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Credit Risk.&lt;/b&gt; 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 or guarantor of a portfolio investment fails to make timely principal or interest payments or otherwise honor its obligations.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; A particular investment may be difficult to purchase or sell. The fund may be unable to sell a security at an advantageous time or price.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;High Yield Risk.&lt;/b&gt; High yield securities and unrated securities of similar credit quality (sometimes called junk bonds) that the fund may invest in are subject to greater levels of credit and liquidity risks. High yield securities are considered primarily speculative with respect to the issuer&amp;#8217;s continuing ability to make principal and interest payments.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Leverage Risk.&lt;/b&gt; Certain fund transactions, such as derivatives, may give rise to a form of leverage and may expose the fund to greater risk. Leverage tends to magnify the effect of any decrease or increase in the value of the fund&amp;#8217;s portfolio securities. The use of leverage may cause the fund to liquidate portfolio positions when it would not be advantageous to do so in order to satisfy its obligations.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Prepayment and Extension Risk.&lt;/b&gt; The fund&amp;#8217;s investments are subject to the risk that the securities may be paid off earlier or later than expected. Either situation could cause the fund to hold securities paying lower-than-market rates of interest, which could hurt the fund&amp;#8217;s yield or share price.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Municipal Securities Risk.&lt;/b&gt; The fund primarily invests in municipal securities whose interest, in the opinion of the issuers&amp;#8217; counsel, is exempt from federal income tax and from the AMT. Neither the investment adviser nor the fund guarantees that this opinion is correct, and there is no assurance that the IRS will agree with such counsel&amp;#8217;s opinion. If certain types of investments the fund buys as tax-exempt are later ruled to be taxable, a portion of the fund&amp;#8217;s income could be taxable. To the extent that the fund invests in municipal securities from a given state or geographic region, its 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. In addition, many municipal securities are issued to finance specific projects (especially those relating to education, health care, transportation and utilities) and conditions in those sectors can affect the overall municipal market. National governmental actions, such as the elimination of tax-exempt status or the reduction of financial support to municipalities, also could affect performance. Municipalities continue to experience difficulties in the current economic and political environment.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;California State-Specific Risk.&lt;/b&gt; Because the fund concentrates its investments in California municipal securities, the fund may be affected significantly by economic, regulatory or political developments affecting the ability of California issuers to pay interest or repay principal.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Derivatives Risk.&lt;/b&gt; The fund&amp;#8217;s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments and could cause the fund to lose more than the principal amount invested. In addition, investments in derivatives may involve leverage, which means a small percentage of assets invested in derivatives can have a disproportionately large impact on the fund. However, these risks are less severe when the fund uses derivatives for hedging rather than to enhance the fund&amp;#8217;s returns or as a substitute for a position or security.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Taxable Investments.&lt;/b&gt; The fund may invest a portion of its assets in securities that generate income that is not exempt from federal income tax and, in addition, with respect to any temporary defensive investments by the fund, in securities whose interest is subject to the AMT. These investments could generate taxable income for shareholders.&lt;br/&gt;&lt;br/&gt;&lt;b&gt;Lack of Governmental Insurance or Guarantee.&lt;/b&gt; An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.&lt;br/&gt;&lt;br/&gt;For more information on the risks of investing in the fund please see the &amp;#8220;Fund details&amp;#8221; section in the prospectus.&lt;br/&gt;&lt;br/&gt;</rr:RiskNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;b&gt;To pursue its goal, the fund normally invests at least 80% of its net assets in Government National Mortgage Association (GNMA) securities.&lt;/b&gt; The fund will notify its shareholders at least 60 days before changing this policy. In addition to GNMA securities, the fund may invest in securities issued by the U.S. government or its other agencies and instrumentalities, such as the Federal National Mortgage Association (Fannie Mae), Federal Home Loan Mortgage Corporation (Freddie Mac) and Federal Home Loan Banks (FHLBs).&lt;br /&gt;&lt;br /&gt;The fund may also invest in mortgage-backed and asset-backed securities, collateralized mortgage obligations, repurchase agreements, and commercial paper. The fund also may invest in derivative instruments, principally futures contracts. The fund typically uses futures as a substitute for taking a position in the underlying asset or as part of a strategy designed to reduce exposure to other risks. The fund is not subject to any maturity or duration restrictions. The fund also may seek to obtain market exposure to the instruments in which it invests by entering into a series of purchase and sale contracts or by using other investment techniques, such as mortgage dollar rolls.&lt;br /&gt;&lt;br /&gt;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. When the fund engages in such activities, the fund would not be pursuing its investment strategy and, as a result, it may not achieve its investment goal.&lt;br /&gt;&lt;br /&gt;The fund may buy and sell portfolio securities actively. If it does, its portfolio turnover rate and transaction costs will rise, which may lower fund performance and increase the likelihood of capital gain distributions.</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;b&gt;Principal risks&lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">The fund is subject to risks, any of which could cause an investor to lose money. The fund&amp;#8217;s principal risks include:&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Market Risk. &lt;/b&gt;Bond markets rise and fall daily. As with any investment whose performance is tied to these markets, the value of your investment in the fund will fluctuate, which means that you could lose money.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Management Risk. &lt;/b&gt;As an actively managed mutual fund, the fund is subject to the risk that its investment adviser will make poor security selections. The fund&amp;#8217;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.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Interest rates will rise and fall over time. During periods when interest rates are low, the fund&amp;#8217;s yield and total return also may be low. Changes in interest rates also may affect the fund&amp;#8217;s share price: a sharp rise in interest rates could cause the fund&amp;#8217;s share price to fall. The longer the fund&amp;#8217;s duration, the more sensitive to interest rate movements its share price is likely to be.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Credit Risk. &lt;/b&gt;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 or guarantor of a portfolio investment fails to make timely principal or interest payments or otherwise honor its obligations.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Liquidity Risk. &lt;/b&gt;A particular investment may be difficult to purchase or sell. The fund may be unable to sell a security at an advantageous time or price.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Prepayment and Extension Risk.&lt;/b&gt; The fund&amp;#8217;s investments are subject to the risk that the securities may be paid off earlier or later than expected. Either situation could cause the fund to hold securities paying lower-than-market rates of interest, which could hurt the fund&amp;#8217;s yield or share price.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Derivatives Risk. &lt;/b&gt;The fund&amp;#8217;s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments and could cause the fund to lose more than the principal amount invested. In addition, investments in derivatives may involve leverage, which means a small percentage of assets invested in derivatives can have a disproportionately large impact on the fund. However, these risks are less severe when the fund uses derivatives for hedging rather than to enhance the fund&amp;#8217;s returns or as a substitute for a position or security.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Mortgage Dollar Rolls Risk. &lt;/b&gt;Mortgage dollar rolls are transactions in which the fund sells mortgage-backed securities to a dealer and simultaneously agrees to repurchase similar securities in the future at a predetermined price. The fund&amp;#8217;s mortgage dollar rolls could lose money if the price of the mortgage-backed securities sold falls below the agreed upon repurchase price, or if the counterparty is unable to honor the agreement.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Leverage Risk. &lt;/b&gt;Certain fund transactions, such as derivatives and mortgage dollar rolls, may give rise to a form of leverage and may expose the fund to greater risk. Leverage tends to magnify the effect of any decrease or increase in the value of the fund&amp;#8217;s portfolio securities. The use of leverage may cause the fund to liquidate portfolio positions when it would not be advantageous to do so in order to satisfy its obligations.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Lack of Governmental Insurance or Guarantee. &lt;/b&gt;An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.&lt;br /&gt;&lt;br /&gt;For more information on the risks of investing in the fund please see the &amp;#8220;Fund details&amp;#8221; section in the prospectus.</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;b&gt;Performance &lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PortfolioTurnoverRate contextRef="Duration_16Dec2011_15Dec2012S000006811_Member" decimals="4" unitRef="pure">5.67</rr:PortfolioTurnoverRate>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index. 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 (both before and after taxes) may differ from past performance. For current performance information, please see www.schwabfunds.com/prospectus.</rr:PerformanceNarrativeTextBlock>
  <rr:RiskLoseMoney contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">The fund is subject to risks, any of which could cause an investor to lose money.</rr:RiskLoseMoney>
  <rr:RiskHeading contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;b&gt;Principal risks &lt;/b&gt;</rr:RiskHeading>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;b&gt;Lack of Governmental Insurance or Guarantee. &lt;/b&gt;An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">Keep in mind that future performance (both before and after taxes) may differ from past performance.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartHeading contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">Annual total returns (%) as of 12/31</rr:BarChartHeading>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">www.schwabfunds.com/prospectus</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:YearToDateReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member">Year-to-date performance</rr:YearToDateReturnLabel>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartYearToDateReturn contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.038</rr:BarChartYearToDateReturn>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member">Best quarter:</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member">2002-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0428</rr:BarChartHighestQuarterlyReturn>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:BarChartHeading contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">Annual total returns (%) as of 12/31</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">Best quarter: 3.54% Q4 2007&lt;br /&gt; Worst quarter: (1.14%) Q2 2004&lt;br /&gt;Year-to-date performance (non-annualized and pre-tax) as of 9/30/12: 2.65%</rr:BarChartClosingTextBlock>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member">Worst quarter:</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartClosingTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">Best quarter: 5.79% Q3 2002&lt;br/&gt;Worst quarter: (3.44%) Q4 2010&lt;br/&gt;Year-to-date performance (non-annualized and pre-tax) as of 9/30/12: 5.66%</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">Average annual total returns (%) as of 12/31/11</rr:PerformanceTableHeading>
  <rr:BarChartHeading contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">Annual total returns (%) as of 12/31</rr:BarChartHeading>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member">2008-03-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;b&gt;Performance &lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">-0.022</rr:BarChartLowestQuarterlyReturn>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index. 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 (both before and after taxes) may differ from past performance. For current performance information, please see www.schwabfunds.com/prospectus. On August 10, 2009, the Investor Share class and Select Share class were combined into a single class of shares of the fund, and the fund no longer offers multiple classes of shares. The performance history of the fund is that of the fund&amp;#8217;s former Select Shares. Accordingly, the past performance information of the fund&amp;#8217;s former Select Shares is shown below. Prior to December 15, 2012, the fund operated under a different investment objective and different investment strategies.</rr:PerformanceNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">Schwab Intermediate-Term Bond Fund&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;TM&lt;/sup&gt; (formerly, Schwab&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;&amp;#174;&lt;/sup&gt; Premier Income Fund)</rr:RiskReturnHeading>
  <rr:PerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">Average annual total returns (%) as of 12/31/11</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNarrativeTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member">Best quarter:</rr:HighestQuarterlyReturnLabel>
  <rr:ShareholderFeesCaption contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">Shareholder fees (fees paid directly from your investment)</rr:ShareholderFeesCaption>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0354</rr:BarChartHighestQuarterlyReturn>
  <rr:OperatingExpensesCaption contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">Annual fund operating expenses (expenses that you pay each year&lt;br/&gt;as a % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member">2007-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member">Worst quarter:</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">-0.0114</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member">2004-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:YearToDateReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member">Year-to-date performance</rr:YearToDateReturnLabel>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0926</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0926</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0721</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberBarclaysSevenYearMunicipalBondIndex_Member" decimals="4" unitRef="pure">0.1014</rr:AverageAnnualReturnYear01>
  <rr:BarChartYearToDateReturn contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member" decimals="4" unitRef="pure">0.0265</rr:BarChartYearToDateReturn>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0439</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0439</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0429</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberBarclaysSevenYearMunicipalBondIndex_Member" decimals="4" unitRef="pure">0.0638</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0474</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0472</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0465</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberBarclaysSevenYearMunicipalBondIndex_Member" decimals="4" unitRef="pure">0.0563</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberC000018440_Member">2003-03-03</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006811_MemberC000018440_Member">2003-03-03</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006811_MemberC000018440_Member">2003-03-03</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012S000006811_MemberBarclaysGnmaIndex_Member">2003-03-03</rr:AverageAnnualReturnInceptionDate>
  <rr:ShareholderFeeOther contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="INF" unitRef="USD">0</rr:ShareholderFeeOther>
  <rr:ManagementFeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0026</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.003</rr:OtherExpensesOverAssets>
  <rr:ExpenseExampleByYearCaption contextRef="Duration_16Dec2011_15Dec2012S000006809_Member">Expenses on a $10,000 investment</rr:ExpenseExampleByYearCaption>
  <rr:ExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0056</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">-0.0027</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" id="Item_8" unitRef="pure">0.0029</rr:NetExpensesOverAssets>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes. Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account. In some cases, the return after taxes may exceed the return before taxes due to an assumed benefit from any losses on a sale of shares at the end of the measurement period.</rr:PerformanceTableNarrativeTextBlock>
  <rr:ExpenseExampleYear01 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="INF" unitRef="USD">30</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="INF" unitRef="USD">93</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="INF" unitRef="USD">163</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="INF" unitRef="USD">368</rr:ExpenseExampleYear10>
  <rr:AnnualReturn2002 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0877</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0428</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0457</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0267</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0462</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0471</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">-0.0441</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0443</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.06</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.074</rr:AnnualReturn2011>
  <rr:AnnualReturn2002 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0817</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0464</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0502</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0329</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0439</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0228</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">-0.0107</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0938</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.025</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0926</rr:AnnualReturn2011>
  <rr:RiskNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">The fund is subject to risks, any of which could cause an investor to lose money. The fund&amp;#8217;s principal risks include:&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Market Risk. &lt;/b&gt;Bond markets rise and fall daily. As with any investment whose performance is tied to these markets, the value of your investment in the fund will fluctuate, which means that you could lose money.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Management Risk. &lt;/b&gt;As an actively managed mutual fund, the fund is subject to the risk that its investment adviser will make poor security selections. The fund&amp;#8217;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.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Interest rates will rise and fall over time. During periods when interest rates are low, the fund&amp;#8217;s yield and total return also may be low. Changes in interest rates also may affect the fund&amp;#8217;s share price: a sharp rise in interest rates could cause the fund&amp;#8217;s share price to fall. The longer the fund&amp;#8217;s duration, the more sensitive to interest rate movements its share price is likely to be.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Credit Risk. &lt;/b&gt;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 or guarantor of a portfolio investment fails to make timely principal or interest payments or otherwise honor its obligations.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Liquidity Risk. &lt;/b&gt;A particular investment may be difficult to purchase or sell. The fund may be unable to sell a security at an advantageous time or price.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Prepayment and Extension Risk. &lt;/b&gt;The fund&amp;#8217;s investments are subject to the risk that the securities may be paid off earlier or later than expected. Either situation could cause the fund to hold securities paying lower-than-market rates of interest, which could hurt the fund&amp;#8217;s yield or share price.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;High Yield Risk. &lt;/b&gt;High yield securities and unrated securities of similar credit quality (sometimes called junk bonds) that the fund may invest in are subject to greater levels of credit and liquidity risks. High yield securities are considered primarily speculative with respect to the issuer&amp;#8217;s continuing ability to make principal and interest payments.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Foreign Investment Risk. &lt;/b&gt;The fund&amp;#8217;s investments in securities of foreign issuers may involve certain risks that are greater than those associated with investments in securities of U.S. issuers. These include: risks of adverse changes in foreign economic, political, regulatory and other conditions; changes in currency exchange rates or exchange control regulations (including limitations on currency movements and exchanges); differing accounting, auditing, financial reporting and legal standards and practices; differing securities market structures; and higher transaction costs. These risks may be heightened in connection with investments in emerging markets.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Emerging Markets Risk. &lt;/b&gt;Emerging market countries may be more likely to experience political turmoil or rapid changes in market or economic conditions than more developed countries. Such countries often have less uniformity in accounting and reporting requirements and greater risk associated with the custody of securities. In addition, the financial stability of issuers (including governments) in emerging market countries may be more precarious than in other countries. As a result, there will tend to be an increased risk of price volatility associated with the fund&amp;#8217;s investments in emerging market countries and, at times, it may be difficult to value such investments.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Derivatives Risk. &lt;/b&gt;The fund&amp;#8217;s use of derivative instruments involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other traditional investments and could cause the fund to lose more than the principal amount invested. In addition, investments in derivatives may involve leverage, which means a small percentage of assets invested in derivatives can have a disproportionately large impact on the fund. However, these risks are less severe when the fund uses derivatives for hedging rather than to enhance the fund&amp;#8217;s returns or as a substitute for a position or security.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Mortgage Dollar Rolls Risk. &lt;/b&gt;Mortgage dollar rolls are transactions in which the fund sells mortgage-backed securities to a dealer and simultaneously agrees to repurchase similar securities in the future at a predetermined price. The fund&amp;#8217;s mortgage dollar rolls could lose money if the price of the mortgage-backed securities sold falls below the agreed upon repurchase price, or if the counterparty is unable to honor the agreement.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Leverage Risk. &lt;/b&gt;Certain fund transactions, such as derivatives and mortgage dollar rolls, may give rise to a form of leverage and may expose the fund to greater risk. Leverage tends to magnify the effect of any decrease or increase in the value of the fund&amp;#8217;s portfolio securities. The use of leverage may cause the fund to liquidate portfolio positions when it would not be advantageous to do so in order to satisfy its obligations.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;Lack of Governmental Insurance or Guarantee. &lt;/b&gt;An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. &lt;br/&gt;&lt;br/&gt;For more information on the risks of investing in the fund please see the &amp;#8220;Fund details&amp;#8221; section in the prospectus.</rr:RiskNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;b&gt;Under normal circumstances, the fund invests at least 80% of its net assets (net assets plus borrowings for investment purposes) in debt instruments. &lt;/b&gt;The fund will notify its shareholders at least 60 days before changing this policy. The fund invests primarily in fixed income instruments issued by the U.S. government, its agencies or instrumentalities, and U.S. companies and entities. The fund may also invest in U.S. dollar denominated fixed income instruments issued by non-U.S. and emerging market governments, governmental agencies, companies and entities and supranational entities. Under normal circumstances, the dollar- weighted average maturity of the fund&amp;#8217;s portfolio is expected to be between three years and ten years.  &lt;br /&gt;&lt;br /&gt;The fund may invest in fixed-, variable- or floating-rate bonds of any kind, including, government and agency bonds, corporate bonds, commercial and residential mortgage-backed securities, collateralized mortgage obligations, asset-backed securities, hybrid securities and preferred securities.  &lt;br /&gt;&lt;br /&gt;The fund invests at least 75% of its net assets in investment grade bonds as rated by independent rating agencies, or if unrated, determined by the investment adviser to be of comparable quality. The fund may also invest up to 10% of its net assets in bonds rated below investment-grade (sometimes called junk bonds) or their unrated equivalents as determined by the investment adviser. The fund may invest in bonds having ultra-short, short-, intermediate-and long-term maturities.  &lt;br /&gt;&lt;br /&gt;The fund also may invest in derivative instruments, principally futures contracts. The fund typically uses derivatives as a substitute for taking a position in the underlying asset or as a strategy designed to manage exposure to other risks. The fund may also invest in mortgage dollar rolls.  &lt;br /&gt;&lt;br /&gt;The fund selects investments across and within various market sectors based on the investment adviser&amp;#8217;s assessment of economic, market, political and industry conditions and analysis of each issuer. In making this determination, the investment adviser may consider a variety of factors that it determines to be relevant from time to time, such as projected interest rate movements, volatility forecasts, technical data, industry cycles, political events and the  issuer&amp;#8217;s financial condition, earning estimates, management and industry position. &lt;br /&gt;&lt;br /&gt;The fund may hold all of its assets in cash, cash equivalents and other short-term investments for temporary or defensive purposes. The fund may utilize such tactics when the investment adviser believes that market or economic or political conditions are unfavorable for investors. Under such circumstances, the fund may not achieve its investment objective.</rr:StrategyNarrativeTextBlock>
  <rr:PortfolioTurnoverRate contextRef="Duration_16Dec2011_15Dec2012S000018876_Member" decimals="4" unitRef="pure">3.04</rr:PortfolioTurnoverRate>
  <rr:RiskLoseMoney contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">The fund is subject to risks, any of which could cause an investor to lose money.</rr:RiskLoseMoney>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.074</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0632</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0478</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberBarclaysUsAggregateBondIndexs_Member" decimals="4" unitRef="pure">0.0784</rr:AverageAnnualReturnYear01>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member">Best quarter:</rr:HighestQuarterlyReturnLabel>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;b&gt;Lack of Governmental Insurance or Guarantee. &lt;/b&gt;An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:BarChartHighestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0579</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member">2002-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member">Worst quarter:</rr:LowestQuarterlyReturnLabel>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">The bar chart below shows how the fund&amp;#8217;s investment results have varied from year to year, and the following table shows how the fund&amp;#8217;s average annual total returns for various periods compared to that of an index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0354</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.021</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0216</rr:AverageAnnualReturnYear05>
  <rr:BarChartLowestQuarterlyReturn contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">-0.0344</rr:BarChartLowestQuarterlyReturn>
  <rr:AverageAnnualReturnYear05 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberBarclaysUsAggregateBondIndexs_Member" decimals="4" unitRef="pure">0.065</rr:AverageAnnualReturnYear05>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member">2010-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:YearToDateReturnLabel contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member">Year-to-date performance</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0425</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0264</rr:AverageAnnualReturnYear10>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">Keep in mind that future performance (both before and after taxes) may differ from past performance.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000006810_MemberC000018438_Member" decimals="4" unitRef="pure">0.0269</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 contextRef="Duration_16Dec2011_15Dec2012S000006810_MemberBarclaysUsAggregateBondIndexs_Member" decimals="4" unitRef="pure">0.0578</rr:AverageAnnualReturnYear10>
  <rr:BarChartYearToDateReturn contextRef="Duration_16Dec2011_15Dec2012S000006818_MemberC000018451_Member" decimals="4" unitRef="pure">0.0566</rr:BarChartYearToDateReturn>
  <rr:BarChartTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualTotalReturnsSchwabGNMAFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualTotalReturnsSchwabPremierIncomeFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualTotalReturnsSchwabTotalBondMarketFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">www.schwabfunds.com/prospectus</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:ExpenseExampleByYearCaption contextRef="Duration_16Dec2011_15Dec2012S000006810_Member">Expenses on a $10,000 investment</rr:ExpenseExampleByYearCaption>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:ExpenseExampleByYearCaption contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">Expenses on a $10,000 investment</rr:ExpenseExampleByYearCaption>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleShareholderFeesSchwabCaliforniaTax-FreeBondFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualFundOperatingExpensesSchwabCaliforniaTax-FreeBondFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;b&gt;Performance&lt;/b&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleExpenseExampleTransposedSchwabCaliforniaTax-FreeBondFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAnnualTotalReturnsSchwabCaliforniaTax-FreeBondFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">Schwab California Tax-Free Bond Fund&lt;sup style="POSITION: relative; BOTTOM: 0.8ex; VERTICAL-ALIGN: baseline"&gt;TM&lt;/sup&gt;</rr:RiskReturnHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">Best quarter: 6.04% Q3 2009&lt;br/&gt;Worst quarter: (1.70%) Q4 2008&lt;br/&gt;Year-to-date performance (non-annualized and pre-tax) as of 9/30/12: 3.22%</rr:BarChartClosingTextBlock>
  <rr:ExpenseExampleByYearCaption contextRef="Duration_16Dec2011_15Dec2012S000006815_Member">Expenses on a $10,000 investment</rr:ExpenseExampleByYearCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">Annual fund operating expenses (expenses that you pay each year&lt;br/&gt; as a % of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:PortfolioTurnoverRate contextRef="Duration_16Dec2011_15Dec2012S000006818_Member" decimals="4" unitRef="pure">1.01</rr:PortfolioTurnoverRate>
  <rr:RiskLoseMoney contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">The fund is subject to risks, any of which could cause an investor to lose money.</rr:RiskLoseMoney>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">The bar chart below 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 compared to that of an index.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">www.schwabfunds.com/prospectus</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">Keep in mind that future performance (both before and after taxes) may differ from past performance.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceTableUsesHighestFederalRate contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">The after-tax figures reflect the highest individual federal income tax rates in effect during the period and do not reflect the impact of state and local taxes.</rr:PerformanceTableUsesHighestFederalRate>
  <rr:PerformanceTableNotRelevantToTaxDeferred contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">Your actual after-tax returns depend on your individual tax situation. In addition, after-tax returns are not relevant if you hold your fund shares through a tax-deferred arrangement, such as a 401(k) plan, IRA or other tax-advantaged account.</rr:PerformanceTableNotRelevantToTaxDeferred>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.0563</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.0434</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.0379</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear01 contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberComparativeIndexBarclaysUsAggregateIntermediateBondIndex_Member" decimals="4" unitRef="pure">0.0597</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.0665</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.047</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000018876_MemberC000052265_Member" decimals="4" unitRef="pure">0.0454</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberComparativeIndexBarclaysUsAggregateIntermediateBondIndex_Member" decimals="4" unitRef="pure">0.0604</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberC000052265_Member">2007-10-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributions_MemberS000018876_MemberC000052265_Member">2007-10-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012AfterTaxesOnDistributionsAndSales_MemberS000018876_MemberC000052265_Member">2007-10-31</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_16Dec2011_15Dec2012S000018876_MemberComparativeIndexBarclaysUsAggregateIntermediateBondIndex_Member">2007-10-31</rr:AverageAnnualReturnInceptionDate>
  <rr:PerformanceTableTextBlock contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">&lt;div style="display:none"&gt;~ http://www.schwabfunds.com/role/ScheduleAverageAnnualTotalReturnsTransposedSchwabPremierIncomeFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_16Dec2011_15Dec2012S000018876_Member">Example</rr:ExpenseExampleHeading>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;b&gt;Lack of Governmental Insurance or Guarantee.&lt;/b&gt; An investment in the fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskNondiversifiedStatus contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">&lt;b&gt;Non-Diversification Risk.&lt;/b&gt; The fund is non-diversified and, as such, may invest a greater percentage of its assets in the securities of a single issuer than a fund that is diversified. A non-diversified fund is more susceptible to risks associated with a single economic, political or regulatory occurrence than a diversified fund.</rr:RiskNondiversifiedStatus>
  <rr:ExpenseExampleByYearCaption contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">Expenses on a $10,000 investment</rr:ExpenseExampleByYearCaption>
  <rr:ExpenseExampleByYearCaption contextRef="Duration_16Dec2011_15Dec2012S000006811_Member">Expenses on a $10,000 investment</rr:ExpenseExampleByYearCaption>
  <rr:ExpenseExampleByYearCaption contextRef="Duration_16Dec2011_15Dec2012S000006819_Member">Expenses on a $10,000 investment</rr:ExpenseExampleByYearCaption>
  <rr:PerformanceTableHeading contextRef="Duration_16Dec2011_15Dec2012S000006818_Member">Average annual total returns (%) as of 12/31/11</rr:PerformanceTableHeading>
  <link:footnoteLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:loc xlink:href="#Item_2" xlink:label="NetExpensesOverAssets" xlink:type="locator"/>
    <link:footnote id="footnote_NetExpensesOverAssets" xlink:label="footnote_NetExpensesOverAssets" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">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 0.29% for so long as the investment adviser serves as the adviser to the fund. This agreement may only be amended or terminated with the approval of the fund's Board of Trustees.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="NetExpensesOverAssets" xlink:to="footnote_NetExpensesOverAssets" xlink:type="arc"/>
    <link:loc xlink:href="#Item_6" xlink:label="NetExpensesOverAssets_2" xlink:type="locator"/>
    <link:footnote id="footnote_NetExpensesOverAssets_2" xlink:label="footnote_NetExpensesOverAssets_2" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">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. This agreement may only be amended or terminated with the approval of the fund's Board of Trustees.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="NetExpensesOverAssets_2" xlink:to="footnote_NetExpensesOverAssets_2" xlink:type="arc"/>
    <link:loc xlink:href="#Item_3" xlink:label="NetExpensesOverAssets_3" xlink:type="locator"/>
    <link:footnote id="footnote_NetExpensesOverAssets_3" xlink:label="footnote_NetExpensesOverAssets_3" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">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 0.49% for so long as the investment adviser serves as the adviser to the fund. This agreement may only be amended or terminated with the approval of the fund's Board of Trustees.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="NetExpensesOverAssets_3" xlink:to="footnote_NetExpensesOverAssets_3" xlink:type="arc"/>
    <link:loc xlink:href="#Item_7" xlink:label="Item_7_lbl" xlink:type="locator"/>
    <link:footnoteArc order="1.0" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="Item_7_lbl" xlink:to="footnote_NetExpensesOverAssets_3" xlink:type="arc"/>
    <link:loc xlink:href="#Item_5" xlink:label="NetExpensesOverAssets_4" xlink:type="locator"/>
    <link:footnote id="footnote_NetExpensesOverAssets_4" xlink:label="footnote_NetExpensesOverAssets_4" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">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 0.45% for so long as the investment adviser serves as the adviser to the fund. This agreement may only be amended or terminated with the approval of the fund's Board of Trustees.</link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="NetExpensesOverAssets_4" xlink:to="footnote_NetExpensesOverAssets_4" xlink:type="arc"/>
    <link:loc xlink:href="#Item_4" xlink:label="NetExpensesOverAssets_5" xlink:type="locator"/>
    <link:footnote id="footnote_NetExpensesOverAssets_5" xlink:label="footnote_NetExpensesOverAssets_5" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">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 0.29% for so long as the investment adviser serves as the adviser to the fund. This agreement may only be amended or terminated with the approval of the fund&#x2019;s Board of Trustees. </link:footnote>
    <link:footnoteArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote" xlink:from="NetExpensesOverAssets_5" xlink:to="footnote_NetExpensesOverAssets_5" xlink:type="arc"/>
    <link:loc xlink:href="#Item_8" xlink:label="NetExpensesOverAssets_6" xlink:type="locator"/>
    <link:footnote id="footnote_NetExpensesOverAssets_6" xlink:label="footnote_NetExpensesOverAssets_6" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">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 0.29% for so long as the investment adviser serves as the adviser to the fund. This agreement may only be amended or terminated with the approval of the fund's Board of Trustees. The investment adviser and its affiliates have agreed to advance the fund certain litigation expenses in connection with certain legal matters (excluding amounts paid in connection with judgments and settlements) to the extent necessary to maintain these expense limitations. These advances are subject to repayment by the fund to the extent the litigation expenses are subsequently paid or reimbursed to the fund by its insurance carriers. </link:footnote>
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