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<!-- EDGAR Online I-Metrix Xcelerate Instance Document, based on XBRL 2.1  http://www.edgar-online.com/ -->
<!-- Version:  6.20.1 -->
<!-- Round: 2 -->
<!-- Creation date: 2012-11-15T21:09:26Z -->
<!-- Copyright (c) 2005-2011 EDGAR Online, Inc. All Rights Reserved. -->
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  <dei:DocumentType contextRef="eol_0000717341-12-000043_STD_1_20121101_0" id="id_399717_DF03198E-5CCA-4B18-819D-2B366883425C_1_3">485BPOS</dei:DocumentType>
  <dei:DocumentPeriodEndDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0" id="id_399717_DF03198E-5CCA-4B18-819D-2B366883425C_1_5">2012-06-30</dei:DocumentPeriodEndDate>
  <dei:EntityCentralIndexKey contextRef="eol_0000717341-12-000043_STD_1_20121101_0" id="id_399717_3749862A-EA8E-46C8-A781-CFAFEFE2ACDF_1_1">0000717341</dei:EntityCentralIndexKey>
  <dei:DocumentEffectiveDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0" id="id_399717_DF03198E-5CCA-4B18-819D-2B366883425C_1_1">2012-11-01</dei:DocumentEffectiveDate>
  <dei:EntityRegistrantName contextRef="eol_0000717341-12-000043_STD_1_20121101_0" id="id_399717_3749862A-EA8E-46C8-A781-CFAFEFE2ACDF_1_0">DREYFUS LAUREL TAX FREE MUNICIPAL FUNDS</dei:EntityRegistrantName>
  <dei:AmendmentFlag contextRef="eol_0000717341-12-000043_STD_1_20121101_0" id="id_399717_DF03198E-5CCA-4B18-819D-2B366883425C_1_4">false</dei:AmendmentFlag>
  <dei:DocumentCreationDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0" id="id_399717_DF03198E-5CCA-4B18-819D-2B366883425C_1_0">2012-10-26</dei:DocumentCreationDate>
  <rr:ProspectusDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0" id="id_399717_DF03198E-5CCA-4B18-819D-2B366883425C_1_2">2012-11-01</rr:ProspectusDate>
  <rr:RiskNondiversifiedStatus contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_28">The fund is non-diversified, which means that the fund may invest a relatively
high percentage of its assets in a limited number of issuers. Therefore, the
fund&apos;s performance may be more vulnerable to changes in the market value of a
single issuer or group of issuers and more susceptible to risks associated with
a single economic, political or regulatory occurrence than a diversified fund.</rr:RiskNondiversifiedStatus>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_65">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/ExpenseExample_S000000323Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_63">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/BarChartData_S000000323Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:BarChartTableTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_3">&lt;tt&gt;The fund seeks to provide a high level of current income exempt from federal,&lt;br /&gt;New York state and New York city income taxes to the extent consistent with the&lt;br /&gt;preservation of capital and the maintenance of liquidity.&lt;/tt&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_19">&lt;tt&gt;The Example is intended to help you compare the cost of investing in the fund&lt;br /&gt;with the cost of investing in other mutual funds. The Example assumes that you&lt;br /&gt;invest $10,000 in the fund for the time periods indicated and then redeem all &lt;br /&gt;of your shares at the end of those periods. The Example also assumes that your&lt;br /&gt;investment has a 5% return each year and that the fund&apos;s operating expenses&lt;br /&gt;remain the same. Although your actual costs may be higher or lower, based on&lt;br /&gt;these assumptions your costs would be:&lt;/tt&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_25">&lt;tt&gt;As a money market fund, the fund is subject to the maturity, quality, liquidity&lt;br /&gt;and diversification requirements of Rule 2a-7 under the Investment Company Act&lt;br /&gt;of 1940, as amended, which are designed to help money market funds maintain a&lt;br /&gt;stable share price of $1.00. To pursue its goal, the fund normally invests&lt;br /&gt;substantially all of its net assets in short-term, high quality municipal&lt;br /&gt;obligations that provide income exempt from federal and New York state and New&lt;br /&gt;York city income taxes. The fund also may invest in high quality short-term&lt;br /&gt;structured notes, which are derivative instruments whose value is tied to&lt;br /&gt;underlying municipal obligations.&lt;br /&gt; &lt;br /&gt;Although the fund seeks to provide income exempt from federal and New York state&lt;br /&gt;and New York city income taxes, income from some of the fund&apos;s holdings may be&lt;br /&gt;subject to the federal alternative minimum tax. In addition, the fund may invest&lt;br /&gt;temporarily in high quality, taxable money market instruments and/or municipal&lt;br /&gt;obligations that pay income exempt only from federal income tax, including when&lt;br /&gt;the portfolio manager believes acceptable New York municipal obligations are not&lt;br /&gt;available for investment.&lt;/tt&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_1">Fund Summary</rr:RiskReturnHeading>
  <rr:ExpenseExampleHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_18">Example</rr:ExpenseExampleHeading>
  <rr:ObjectiveHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_2">Investment Objective</rr:ObjectiveHeading>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_35">The fund&apos;s past performance (before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_26">Principal Risks</rr:RiskHeading>
  <rr:ShareholderFeesCaption contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_6">Shareholder Fees (charged if your account balance is less than $50,000)</rr:ShareholderFeesCaption>
  <rr:BarChartHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_36">Year-by-Year Total Returns as of 12/31 each year (%)</rr:BarChartHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_31">Performance</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceTableClosingTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_62">&lt;tt&gt;For the fund&apos;s current yield, call toll free 1-800-DREYFUS (inside the U.S. only).&lt;/tt&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_33">The following bar chart and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:BarChartClosingTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_57">&lt;tt&gt;Best Quarter&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;Q3, 2007: 0.83%&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;Worst Quarter&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;Q4, 2011: 0.00% &lt;br /&gt;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;The fund&apos;s year-to-date total return as of 9/30/12 was 0.00%.&lt;/tt&gt;</rr:BarChartClosingTextBlock>
  <rr:OperatingExpensesCaption contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_11">Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:AverageAnnualReturnCaption contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_58">Average Annual Total Returns as of 12/31/11</rr:AverageAnnualReturnCaption>
  <rr:BarChartNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_37">&lt;tt&gt;The bar chart shows changes in the performance of the fund&apos;s shares from year &lt;br /&gt;to year.&lt;/tt&gt;</rr:BarChartNarrativeTextBlock>
  <rr:RiskMoneyMarketFund contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_29">Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.</rr:RiskMoneyMarketFund>
  <rr:RiskNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_27">&lt;tt&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit&lt;br /&gt;Insurance Corporation (FDIC) or any other government agency. Although the fund&lt;br /&gt;seeks to preserve the value of your investment at $1.00 per share, it is&lt;br /&gt;possible to lose money by investing in the fund.&lt;br /&gt; &lt;br /&gt;The fund&apos;s yield will fluctuate as the short-term securities in its portfolio&lt;br /&gt;mature and the proceeds are reinvested in securities with different interest&lt;br /&gt;rates. Additionally, while the fund has maintained a constant share price since&lt;br /&gt;inception, and will continue to try to do so, neither The Dreyfus Corporation&lt;br /&gt;nor its affiliates are required to make a capital infusion, enter into a capital&lt;br /&gt;support agreement or take other actions to prevent the fund&apos;s share price from&lt;br /&gt;falling below $1.00. The following are the principal risks that could reduce the&lt;br /&gt;fund&apos;s income level and/or share price:&lt;br /&gt; &lt;br /&gt;o Interest rate risk. This risk refers to the decline in the prices of&lt;br /&gt;fixed-income securities that may accompany a rise in the overall level of&lt;br /&gt;interest rates. A sharp and unexpected rise in interest rates could cause a&lt;br /&gt;money market fund&apos;s share price to drop below a dollar.&lt;br /&gt; &lt;br /&gt;o Credit risk. Failure of an issuer to make timely interest or principal&lt;br /&gt;payments, or a decline or perception of a decline in the credit quality of a&lt;br /&gt;security, can cause the security&apos;s price to fall, potentially lowering the&lt;br /&gt;fund&apos;s share price. Although the fund invests only in high quality debt&lt;br /&gt;securities, any of the fund&apos;s holdings could have its credit rating downgraded&lt;br /&gt;or could default. The credit quality of the securities held by the fund can&lt;br /&gt;change rapidly in certain market environments, and the default of a single&lt;br /&gt;holding could have the potential to cause significant deterioration of the&lt;br /&gt;fund&apos;s net asset value.&lt;br /&gt; &lt;br /&gt;o Liquidity risk. When there is little or no active trading market for specific&lt;br /&gt;types of securities, it can become more difficult to sell the securities at or&lt;br /&gt;near their perceived value. In such a market, the value of such securities may&lt;br /&gt;fall dramatically, potentially lowering the fund&apos;s share price, even during&lt;br /&gt;periods of declining interest rates. Also, during such periods, redemptions by a&lt;br /&gt;few large investors in the fund may have a significant adverse effect on the&lt;br /&gt;fund&apos;s net asset value and remaining fund shareholders.&lt;br /&gt; &lt;br /&gt;o Tax risk. To be tax-exempt, municipal obligations generally must meet certain&lt;br /&gt;regulatory requirements. If any such municipal obligation fails to meet these&lt;br /&gt;regulatory requirements, the interest received by the fund from its investment&lt;br /&gt;in such obligations and distributed to fund shareholders will be taxable.&lt;br /&gt; &lt;br /&gt;o Structured notes risk. Structured notes, a type of derivative instrument, can&lt;br /&gt;be volatile, and the possibility of default by the financial institution or&lt;br /&gt;counterparty may be greater for these instruments than for other types of money&lt;br /&gt;market instruments. Structured notes typically are purchased in privately&lt;br /&gt;negotiated transactions from financial institutions and, thus, an active trading&lt;br /&gt;market for such instruments may not exist.&lt;br /&gt; &lt;br /&gt;o State-specific risk. The fund is subject to the risk that New York&apos;s economy,&lt;br /&gt;and the revenues underlying its municipal obligations, may decline. Investing&lt;br /&gt;primarily in a single state makes the fund more sensitive to risks specific to&lt;br /&gt;the state and may magnify other risks.&lt;br /&gt; &lt;br /&gt;o Non-diversification risk. The fund is non-diversified, which means that the&lt;br /&gt;fund may invest a relatively high percentage of its assets in a limited number&lt;br /&gt;of issuers. Therefore, the fund&apos;s performance may be more vulnerable to changes&lt;br /&gt;in the market value of a single issuer or group of issuers and more susceptible&lt;br /&gt;to risks associated with a single economic, political or regulatory occurrence&lt;br /&gt;than a diversified fund.&lt;/tt&gt;</rr:RiskNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_4">Fees and Expenses</rr:ExpenseHeading>
  <rr:StrategyHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_24">Principal Investment Strategy</rr:StrategyHeading>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_34">www.dreyfus.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_32">&lt;tt&gt;The following bar chart and table provide some indication of the risks of&lt;br /&gt;investing in the fund. The table shows the average annual total returns of &lt;br /&gt;the fund&apos;s shares over time. The fund&apos;s past performance (before and after&lt;br /&gt;taxes) is no guarantee of future results. More recent performance &lt;br /&gt;information may be available at www.dreyfus.com.&lt;/tt&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_5">&lt;tt&gt;This table describes the fees and expenses that you may pay if you buy and hold&lt;br /&gt;shares of the fund.&lt;/tt&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_66">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/OperatingExpensesData_S000000323Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_67">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/PerformanceTableData_S000000323Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_30">An investment in the fund is not insured or guaranteed by the Federal Deposit
Insurance Corporation (FDIC) or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:ShareholderFeesTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1001_64">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/ShareholderFeesData_S000000323Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <dei:TradingSymbol contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_0">DNIXX</dei:TradingSymbol>
  <rr:AnnualReturn2002 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_38">0.0103</rr:AnnualReturn2002>
  <rr:LowestQuarterlyReturnLabel contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_54">Worst Quarter</rr:LowestQuarterlyReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_51">Best Quarter</rr:HighestQuarterlyReturnLabel>
  <rr:ShareholderFeeOther contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="iso4217_USD" decimals="2" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_8">5.00</rr:ShareholderFeeOther>
  <rr:BarChartYearToDateReturnDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_50">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:ExchangeFee contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="iso4217_USD" decimals="2" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_7">5.00</rr:ExchangeFee>
  <rr:ExpenseExampleYear01 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="iso4217_USD" decimals="0" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_20">46</rr:ExpenseExampleYear01>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_53">2007-09-07</rr:BarChartHighestQuarterlyReturnDate>
  <rr:ExpenseExampleYear03 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="iso4217_USD" decimals="0" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_21">144</rr:ExpenseExampleYear03>
  <rr:BarChartLowestQuarterlyReturn contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_55">0.0000</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2004 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_40">0.0074</rr:AnnualReturn2004>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_15">-0.0001</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:AnnualReturn2010 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="2" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_46">0.00</rr:AnnualReturn2010>
  <rr:ExpenseExampleYear10 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="iso4217_USD" decimals="0" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_23">567</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear05 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="iso4217_USD" decimals="0" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_22">252</rr:ExpenseExampleYear05>
  <rr:AnnualReturn2007 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_43">0.0327</rr:AnnualReturn2007>
  <rr:BarChartHighestQuarterlyReturn contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_52">0.0083</rr:BarChartHighestQuarterlyReturn>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_59">0.0000</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_13">0.0001</rr:OtherExpensesOverAssets>
  <rr:AnnualReturn2008 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_44">0.0205</rr:AnnualReturn2008>
  <rr:ManagementFeesOverAssets contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_12">0.0045</rr:ManagementFeesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_16">1996-05-08</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_56">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:AnnualReturn2009 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_45">0.0040</rr:AnnualReturn2009>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_60">0.0114</rr:AverageAnnualReturnYear05>
  <rr:AnnualReturn2005 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_41">0.0195</rr:AnnualReturn2005>
  <rr:YearToDateReturnLabel contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_48">The fund&apos;s year-to-date total return</rr:YearToDateReturnLabel>
  <rr:AnnualReturn2011 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="2" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_47">0.00</rr:AnnualReturn2011>
  <rr:AnnualReturn2003 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_39">0.0062</rr:AnnualReturn2003>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_61">0.0131</rr:AverageAnnualReturnYear10>
  <rr:NetExpensesOverAssets contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_17">0.0045</rr:NetExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_14">0.0046</rr:ExpensesOverAssets>
  <rr:AnnualReturn2006 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_42">0.0304</rr:AnnualReturn2006>
  <rr:BarChartYearToDateReturn contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="pure" decimals="4" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_49">0.0000</rr:BarChartYearToDateReturn>
  <ck0000717341:ShareholderFeeOther2 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="iso4217_USD" decimals="2" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_9">5.00</ck0000717341:ShareholderFeeOther2>
  <ck0000717341:ShareholderFeeOther3 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980341_602238x-9980338_602488x-9980345" unitRef="iso4217_USD" decimals="2" id="id_399717_128839AC-34AF-42DB-AB08-EE7B52DC138C_1002_10">2.00</ck0000717341:ShareholderFeeOther3>
  <rr:RiskNondiversifiedStatus contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_28">The fund is non-diversified, which means that the fund may invest a relatively
high percentage of its assets in a limited number of issuers. Therefore, the
fund&apos;s performance may be more vulnerable to changes in the market value of a
single issuer or group of issuers and more susceptible to risks associated with
a single economic, political or regulatory occurrence than a diversified fund.</rr:RiskNondiversifiedStatus>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_65">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/ExpenseExample_S000000322Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_63">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/BarChartData_S000000322Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:BarChartTableTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_3">&lt;tt&gt;The fund seeks to provide a high level of current income exempt from federal and&lt;br /&gt;Massachusetts state income taxes to the extent consistent with the preservation&lt;br /&gt;of capital and the maintenance of liquidity.&lt;/tt&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_19">&lt;tt&gt;The Example is intended to help you compare the cost of investing in the fund&lt;br /&gt;with the cost of investing in other mutual funds. The Example assumes that you&lt;br /&gt;invest $10,000 in the fund for the time periods indicated and then redeem all &lt;br /&gt;of your shares at the end of those periods. The Example also assumes that your&lt;br /&gt;investment has a 5% return each year and that the fund&apos;s operating expenses&lt;br /&gt;remain the same. Although your actual costs may be higher or lower, based on&lt;br /&gt;these assumptions your costs would be:&lt;/tt&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_25">&lt;tt&gt;As a money market fund, the fund is subject to the maturity, quality, liquidity&lt;br /&gt;and diversification requirements of Rule 2a-7 under the Investment Company Act&lt;br /&gt;of 1940, as amended, which are designed to help money market funds maintain a&lt;br /&gt;stable share price of $1.00. To pursue its goal, the fund normally invests&lt;br /&gt;substantially all of its net assets in short-term, high quality municipal&lt;br /&gt;obligations that provide income exempt from federal and Massachusetts state&lt;br /&gt;income taxes. The fund also may invest in high quality short-term structured&lt;br /&gt;notes, which are derivative instruments whose value is tied to underlying&lt;br /&gt;municipal obligations.&lt;br /&gt; &lt;br /&gt;Although the fund seeks to provide income exempt from federal and Massachusetts&lt;br /&gt;state income taxes, income from some of the fund&apos;s holdings may be subject to&lt;br /&gt;the federal alternative minimum tax. In addition, the fund may invest&lt;br /&gt;temporarily in high quality, taxable money market instruments and/or municipal&lt;br /&gt;obligations that pay income exempt only from federal income tax, including when&lt;br /&gt;the portfolio manager believes acceptable Massachusetts municipal obligations&lt;br /&gt;are not available for investment.&lt;/tt&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_1">Fund Summary</rr:RiskReturnHeading>
  <rr:ExpenseExampleHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_18">Example</rr:ExpenseExampleHeading>
  <rr:ObjectiveHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_2">Investment Objective</rr:ObjectiveHeading>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_35">The fund&apos;s past performance (before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_26">Principal Risks</rr:RiskHeading>
  <rr:ShareholderFeesCaption contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_6">Shareholder Fees (charged if your account balance is less than $50,000)</rr:ShareholderFeesCaption>
  <rr:BarChartHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_36">Year-by-Year Total Returns as of 12/31 each year (%)</rr:BarChartHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_31">Performance</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceTableClosingTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_62">&lt;tt&gt;For the fund&apos;s current yield, call toll free 1-800-DREYFUS (inside the U.S. only).&lt;/tt&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_33">The following bar chart and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:BarChartClosingTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_57">&lt;tt&gt;Best Quarter&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;Q2, 2007: 0.83%&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;Worst Quarter&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;Q4, 2011: 0.00%&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&lt;br /&gt;The fund&apos;s year-to-date total return as of 9/30/12 was 0.00%.&lt;/tt&gt;</rr:BarChartClosingTextBlock>
  <rr:OperatingExpensesCaption contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_11">Annual Fund Operating Expenses (expenses that you pay each year as a percentage  of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:AverageAnnualReturnCaption contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_58">Average Annual Total Returns as of 12/31/11</rr:AverageAnnualReturnCaption>
  <rr:BarChartNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_37">&lt;tt&gt;The bar chart shows changes in the performance of the fund&apos;s shares from year &lt;br /&gt;to year.&lt;/tt&gt;</rr:BarChartNarrativeTextBlock>
  <rr:RiskMoneyMarketFund contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_29">Although the fund seeks to preserve the value of your investment at $1.00 per
share, it is possible to lose money by investing in the fund.</rr:RiskMoneyMarketFund>
  <rr:RiskNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_27">&lt;tt&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit&lt;br /&gt;Insurance Corporation (FDIC) or any other government agency. Although the fund&lt;br /&gt;seeks to preserve the value of your investment at $1.00 per share, it is&lt;br /&gt;possible to lose money by investing in the fund.&lt;br /&gt; &lt;br /&gt;The fund&apos;s yield will fluctuate as the short-term securities in its portfolio&lt;br /&gt;mature and the proceeds are reinvested in securities with different interest&lt;br /&gt;rates. Additionally, while the fund has maintained a constant share price since&lt;br /&gt;inception, and will continue to try to do so, neither The Dreyfus Corporation&lt;br /&gt;nor its affiliates are required to make a capital infusion, enter into a capital&lt;br /&gt;support agreement or take other actions to prevent the fund&apos;s share price from&lt;br /&gt;falling below $1.00. The following are the principal risks that could reduce the&lt;br /&gt;fund&apos;s income level and/or share price:&lt;br /&gt; &lt;br /&gt;o Interest rate risk. This risk refers to the decline in the prices of&lt;br /&gt;fixed-income securities that may accompany a rise in the overall level of&lt;br /&gt;interest rates. A sharp and unexpected rise in interest rates could cause a&lt;br /&gt;money market fund&apos;s share price to drop below a dollar.&lt;br /&gt; &lt;br /&gt;o Credit risk. Failure of an issuer to make timely interest or principal&lt;br /&gt;payments, or a decline or perception of a decline in the credit quality of a&lt;br /&gt;security, can cause the security&apos;s price to fall, potentially lowering the&lt;br /&gt;fund&apos;s share price. Although the fund invests only in high quality debt&lt;br /&gt;securities, any of the fund&apos;s holdings could have its credit rating downgraded&lt;br /&gt;or could default. The credit quality of the securities held by the fund can&lt;br /&gt;change rapidly in certain market environments, and the default of a single&lt;br /&gt;holding could have the potential to cause significant deterioration of the&lt;br /&gt;fund&apos;s net asset value.&lt;br /&gt; &lt;br /&gt;o Liquidity risk. When there is little or no active trading market for specific&lt;br /&gt;types of securities, it can become more difficult to sell the securities at or&lt;br /&gt;near their perceived value. In such a market, the value of such securities may&lt;br /&gt;fall dramatically, potentially lowering the fund&apos;s share price, even during&lt;br /&gt;periods of declining interest rates. Also, during such periods, redemptions by a&lt;br /&gt;few large investors in the fund may have a significant adverse effect on the&lt;br /&gt;fund&apos;s net asset value and remaining fund shareholders.&lt;br /&gt; &lt;br /&gt;o Tax risk. To be tax-exempt, municipal obligations generally must meet certain&lt;br /&gt;regulatory requirements. If any such municipal obligation fails to meet these&lt;br /&gt;regulatory requirements, the interest received by the fund from its investment&lt;br /&gt;in such obligations and distributed to fund shareholders will be taxable.&lt;br /&gt; &lt;br /&gt;o Structured notes risk. Structured notes, a type of derivative instrument, can&lt;br /&gt;be volatile, and the possibility of default by the financial institution or&lt;br /&gt;counterparty may be greater for these instruments than for other types of money&lt;br /&gt;market instruments. Structured notes typically are purchased in privately&lt;br /&gt;negotiated transactions from financial institutions and, thus, an active trading&lt;br /&gt;market for such instruments may not exist.&lt;br /&gt; &lt;br /&gt;o State-specific risk. The fund is subject to the risk that Massachusetts&apos;&lt;br /&gt;economy, and the revenues underlying its municipal obligations, may decline.&lt;br /&gt;Investing primarily in a single state makes the fund more sensitive to risks&lt;br /&gt;specific to the state and may magnify other risks.&lt;br /&gt; &lt;br /&gt;o Non-diversification risk. The fund is non-diversified, which means that the&lt;br /&gt;fund may invest a relatively high percentage of its assets in a limited number&lt;br /&gt;of issuers. Therefore, the fund&apos;s performance may be more vulnerable to changes&lt;br /&gt;in the market value of a single issuer or group of issuers and more susceptible&lt;br /&gt;to risks associated with a single economic, political or regulatory occurrence&lt;br /&gt;than a diversified fund.&lt;/tt&gt;</rr:RiskNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_4">Fees and Expenses</rr:ExpenseHeading>
  <rr:StrategyHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_24">Principal Investment Strategy</rr:StrategyHeading>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_34">www.dreyfus.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_32">&lt;tt&gt;The following bar chart and table provide some indication of the risks of&lt;br /&gt;investing in the fund. The table shows the average annual total returns of &lt;br /&gt;the fund&apos;s shares over time. The fund&apos;s past performance (before and after&lt;br /&gt;taxes) is no guarantee of future results. More recent performance &lt;br /&gt;information may be available at www.dreyfus.com.&lt;/tt&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_5">&lt;tt&gt;This table describes the fees and expenses that you may pay if you buy and hold&lt;br /&gt;shares of the fund.&lt;/tt&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_66">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/OperatingExpensesData_S000000322Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_67">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/PerformanceTableData_S000000322Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_30">An investment in the fund is not insured or guaranteed by the Federal Deposit
Insurance Corporation (FDIC) or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:ShareholderFeesTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1001_64">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/ShareholderFeesData_S000000322Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <dei:TradingSymbol contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_0">DMRXX</dei:TradingSymbol>
  <rr:AnnualReturn2002 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_38">0.0103</rr:AnnualReturn2002>
  <rr:LowestQuarterlyReturnLabel contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_54">Worst Quarter</rr:LowestQuarterlyReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_51">Best Quarter</rr:HighestQuarterlyReturnLabel>
  <rr:ShareholderFeeOther contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="iso4217_USD" decimals="2" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_8">5.00</rr:ShareholderFeeOther>
  <rr:BarChartYearToDateReturnDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_50">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:ExchangeFee contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="iso4217_USD" decimals="2" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_7">5.00</rr:ExchangeFee>
  <rr:ExpenseExampleYear01 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="iso4217_USD" decimals="0" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_20">46</rr:ExpenseExampleYear01>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_53">2007-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:ExpenseExampleYear03 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="iso4217_USD" decimals="0" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_21">144</rr:ExpenseExampleYear03>
  <rr:BarChartLowestQuarterlyReturn contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_55">0.0000</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2004 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_40">0.0074</rr:AnnualReturn2004>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_15">-0.0001</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:AnnualReturn2010 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="2" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_46">0.00</rr:AnnualReturn2010>
  <rr:ExpenseExampleYear10 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="iso4217_USD" decimals="0" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_23">567</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear05 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="iso4217_USD" decimals="0" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_22">252</rr:ExpenseExampleYear05>
  <rr:AnnualReturn2007 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_43">0.0323</rr:AnnualReturn2007>
  <rr:BarChartHighestQuarterlyReturn contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_52">0.0083</rr:BarChartHighestQuarterlyReturn>
  <rr:AverageAnnualReturnYear01 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_59">0.0000</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_13">0.0001</rr:OtherExpensesOverAssets>
  <rr:AnnualReturn2008 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_44">0.0186</rr:AnnualReturn2008>
  <rr:ManagementFeesOverAssets contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_12">0.0045</rr:ManagementFeesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_16">1996-05-08</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_56">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:AnnualReturn2009 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_45">0.0010</rr:AnnualReturn2009>
  <rr:AverageAnnualReturnYear05 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_60">0.0103</rr:AverageAnnualReturnYear05>
  <rr:AnnualReturn2005 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_41">0.0196</rr:AnnualReturn2005>
  <rr:YearToDateReturnLabel contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_48">The fund&apos;s year-to-date total return</rr:YearToDateReturnLabel>
  <rr:AnnualReturn2011 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="2" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_47">0.00</rr:AnnualReturn2011>
  <rr:AnnualReturn2003 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_39">0.0062</rr:AnnualReturn2003>
  <rr:AverageAnnualReturnYear10 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_61">0.0124</rr:AverageAnnualReturnYear10>
  <rr:NetExpensesOverAssets contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_17">0.0045</rr:NetExpensesOverAssets>
  <rr:ExpensesOverAssets contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_14">0.0046</rr:ExpensesOverAssets>
  <rr:AnnualReturn2006 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_42">0.0297</rr:AnnualReturn2006>
  <rr:BarChartYearToDateReturn contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="pure" decimals="4" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_49">0.0000</rr:BarChartYearToDateReturn>
  <ck0000717341:ShareholderFeeOther2 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="iso4217_USD" decimals="2" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_9">5.00</ck0000717341:ShareholderFeeOther2>
  <ck0000717341:ShareholderFeeOther3 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980342_602238x-9980339_602488x-9980346" unitRef="iso4217_USD" decimals="2" id="id_399717_4F5173D0-D509-4170-A95B-AB2A84052905_1002_10">2.00</ck0000717341:ShareholderFeeOther3>
  <rr:RiskNondiversifiedStatus contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_28">The fund is non-diversified, which means that the fund may invest a relatively
high percentage of its assets in a limited number of issuers. Therefore, the
fund&apos;s performance may be more vulnerable to changes in the market value of a
single issuer or group of issuers and more susceptible to risks associated with
a single economic, political or regulatory occurrence than a diversified fund.</rr:RiskNondiversifiedStatus>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_65">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/ExpenseExample_S000000321Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_63">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/BarChartData_S000000321Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:BarChartTableTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_3">&lt;tt&gt;The fund seeks to provide a high level of current income exempt from federal and&lt;br /&gt;California state income taxes to the extent consistent with the preservation of&lt;br /&gt;capital and the maintenance of liquidity.&lt;/tt&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_19">&lt;tt&gt;The Example is intended to help you compare the cost of investing in the fund&lt;br /&gt;with the cost of investing in other mutual funds. The Example assumes that you&lt;br /&gt;invest $10,000 in the fund for the time periods indicated and then redeem all &lt;br /&gt;of your shares at the end of those periods. The Example also assumes that your&lt;br /&gt;investment has a 5% return each year and that the fund&apos;s operating expenses&lt;br /&gt;remain the same. Although your actual costs may be higher or lower, based on&lt;br /&gt;these assumptions your costs would be:&lt;/tt&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_25">&lt;tt&gt;As a money market fund, the fund is subject to the maturity, quality, liquidity&lt;br /&gt;and diversification requirements of Rule 2a-7 under the Investment Company Act&lt;br /&gt;of 1940, as amended, which are designed to help money market funds maintain a&lt;br /&gt;stable share price of $1.00. To pursue its goal, the fund normally invests&lt;br /&gt;substantially all of its net assets in short-term, high quality municipal&lt;br /&gt;obligations that provide income exempt from federal and California state income&lt;br /&gt;taxes. The fund also may invest in high quality short-term structured notes,&lt;br /&gt;which are derivative instruments whose value is tied to underlying municipal&lt;br /&gt;obligations.&lt;br /&gt; &lt;br /&gt;Although the fund seeks to provide income exempt from federal and California&lt;br /&gt;state income taxes, income from some of the fund&apos;s holdings may be subject to&lt;br /&gt;the federal alternative minimum tax. In addition, the fund may invest&lt;br /&gt;temporarily in high quality, taxable money market instruments and/or municipal&lt;br /&gt;obligations that pay income exempt only from federal income tax, including when&lt;br /&gt;the portfolio manager believes acceptable California municipal obligations are&lt;br /&gt;not available for investment.&lt;/tt&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_1">Fund Summary</rr:RiskReturnHeading>
  <rr:ExpenseExampleHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_18">Example</rr:ExpenseExampleHeading>
  <rr:ObjectiveHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_2">Investment Objective</rr:ObjectiveHeading>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_35">The fund&apos;s past performance (before and after taxes) is no guarantee of future results.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_26">Principal Risks</rr:RiskHeading>
  <rr:ShareholderFeesCaption contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_6">Shareholder Fees (charged if your account balance is less than $50,000)</rr:ShareholderFeesCaption>
  <rr:BarChartHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_36">Year-by-Year Total Returns as of 12/31 each year (%)</rr:BarChartHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_31">Performance</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceTableClosingTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_62">&lt;tt&gt;For the fund&apos;s current yield, call toll free 1-800-DREYFUS (inside the U.S. only).&lt;/tt&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_33">The following bar chart and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:BarChartClosingTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_57">&lt;tt&gt;Best Quarter&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;Q3, 2007: 0.83%&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;Worst Quarter&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;Q3, 2011: 0.00%&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&amp;#xA0;&lt;br /&gt;&lt;br /&gt;The fund&apos;s year-to-date total return as of 9/30/12 was 0.00%.&lt;/tt&gt;</rr:BarChartClosingTextBlock>
  <rr:OperatingExpensesCaption contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_11">Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
  <rr:AverageAnnualReturnCaption contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_58">Average Annual Total Returns as of 12/31/11</rr:AverageAnnualReturnCaption>
  <rr:BarChartNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_37">&lt;tt&gt;The bar chart shows changes in the performance of the fund&apos;s shares from year &lt;br /&gt;to year.&lt;/tt&gt;</rr:BarChartNarrativeTextBlock>
  <rr:RiskMoneyMarketFund contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_29">Although the fund seeks to preserve the value of your investment at $1.00 per share,
it is possible to lose money by investing in the fund.</rr:RiskMoneyMarketFund>
  <rr:RiskNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_27">&lt;tt&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit&lt;br /&gt;Insurance Corporation (FDIC) or any other government agency. Although the fund&lt;br /&gt;seeks to preserve the value of your investment at $1.00 per share, it is&lt;br /&gt;possible to lose money by investing in the fund.&lt;br /&gt; &lt;br /&gt;The fund&apos;s yield will fluctuate as the short-term securities in its portfolio&lt;br /&gt;mature and the proceeds are reinvested in securities with different interest&lt;br /&gt;rates. Additionally, while the fund has maintained a constant share price since&lt;br /&gt;inception, and will continue to try to do so, neither The Dreyfus Corporation&lt;br /&gt;nor its affiliates are required to make a capital infusion, enter into a capital&lt;br /&gt;support agreement or take other actions to prevent the fund&apos;s share price from&lt;br /&gt;falling below $1.00. The following are the principal risks that could reduce the&lt;br /&gt;fund&apos;s income level and/or share price:&lt;br /&gt; &lt;br /&gt;o Interest rate risk. This risk refers to the decline in the prices of&lt;br /&gt;fixed-income securities that may accompany a rise in the overall level of&lt;br /&gt;interest rates. A sharp and unexpected rise in interest rates could cause a&lt;br /&gt;money market fund&apos;s share price to drop below a dollar.&lt;br /&gt; &lt;br /&gt;o Credit risk. Failure of an issuer to make timely interest or principal&lt;br /&gt;payments, or a decline or perception of a decline in the credit quality of a&lt;br /&gt;security, can cause the security&apos;s price to fall, potentially lowering the&lt;br /&gt;fund&apos;s share price. Although the fund invests only in high quality debt&lt;br /&gt;securities, any of the fund&apos;s holdings could have its credit rating downgraded&lt;br /&gt;or could default. The credit quality of the securities held by the fund can&lt;br /&gt;change rapidly in certain market environments, and the default of a single&lt;br /&gt;holding could have the potential to cause significant deterioration of the&lt;br /&gt;fund&apos;s net asset value.&lt;br /&gt; &lt;br /&gt;o Liquidity risk. When there is little or no active trading market for specific&lt;br /&gt;types of securities, it can become more difficult to sell the securities at or&lt;br /&gt;near their perceived value. In such a market, the value of such securities may&lt;br /&gt;fall dramatically, potentially lowering the fund&apos;s share price, even during&lt;br /&gt;periods of declining interest rates. Also, during such periods, redemptions by a&lt;br /&gt;few large investors in the fund may have a significant adverse effect on the&lt;br /&gt;fund&apos;s net asset value and remaining fund shareholders.&lt;br /&gt; &lt;br /&gt;o Tax risk. To be tax-exempt, municipal obligations generally must meet certain&lt;br /&gt;regulatory requirements. If any such municipal obligation fails to meet these&lt;br /&gt;regulatory requirements, the interest received by the fund from its investment&lt;br /&gt;in such obligations and distributed to fund shareholders will be taxable.&lt;br /&gt; &lt;br /&gt;o Structured notes risk. Structured notes, a type of derivative instrument, can&lt;br /&gt;be volatile, and the possibility of default by the financial institution or&lt;br /&gt;counterparty may be greater for these instruments than for other types of money&lt;br /&gt;market instruments. Structured notes typically are purchased in privately&lt;br /&gt;negotiated transactions from financial institutions and, thus, an active trading&lt;br /&gt;market for such instruments may not exist.&lt;br /&gt; &lt;br /&gt;o State-specific risk. The fund is subject to the risk that California&apos;s&lt;br /&gt;economy, and the revenues underlying its municipal obligations, may decline.&lt;br /&gt;Investing primarily in a single state makes the fund more sensitive to risks&lt;br /&gt;specific to the state and may magnify other risks.&lt;br /&gt; &lt;br /&gt;o Non-diversification risk. The fund is non-diversified, which means that the&lt;br /&gt;fund may invest a relatively high percentage of its assets in a limited number&lt;br /&gt;of issuers. Therefore, the fund&apos;s performance may be more vulnerable to changes&lt;br /&gt;in the market value of a single issuer or group of issuers and more susceptible&lt;br /&gt;to risks associated with a single economic, political or regulatory occurrence&lt;br /&gt;than a diversified fund.&lt;/tt&gt;</rr:RiskNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_4">Fees and Expenses</rr:ExpenseHeading>
  <rr:StrategyHeading contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_24">Principal Investment Strategy</rr:StrategyHeading>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_34">www.dreyfus.com</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_32">&lt;tt&gt;The following bar chart and table provide some indication of the risks of&lt;br /&gt;investing in the fund. The table shows the average annual total returns of &lt;br /&gt;the fund&apos;s shares over time. The fund&apos;s past performance (before and after &lt;br /&gt;taxes) is no guarantee of future results. More recent performance &lt;br /&gt;information may be available at www.dreyfus.com.&lt;/tt&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_5">&lt;tt&gt;This table describes the fees and expenses that you may pay if you buy and hold&lt;br /&gt;shares of the fund.&lt;/tt&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_66">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/OperatingExpensesData_S000000321Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_67">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/PerformanceTableData_S000000321Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:PerformanceTableTextBlock>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_30">An investment in the fund is not insured or guaranteed by the Federal Deposit
Insurance Corporation (FDIC) or any other government agency.</rr:RiskNotInsuredDepositoryInstitution>
  <rr:ShareholderFeesTableTextBlock contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1001_64">&lt;div style="display:none"&gt;~ http://www.dreyfus.com/role/ShareholderFeesData_S000000321Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact *  ~&lt;/div&gt;</rr:ShareholderFeesTableTextBlock>
  <dei:TradingSymbol contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_0">DCLXX</dei:TradingSymbol>
  <rr:AnnualReturn2002 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="pure" decimals="2" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_38">0.01</rr:AnnualReturn2002>
  <rr:LowestQuarterlyReturnLabel contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_54">Worst Quarter</rr:LowestQuarterlyReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_51">Best Quarter</rr:HighestQuarterlyReturnLabel>
  <rr:ShareholderFeeOther contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="iso4217_USD" decimals="2" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_8">5.00</rr:ShareholderFeeOther>
  <rr:BarChartYearToDateReturnDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_50">2012-09-30</rr:BarChartYearToDateReturnDate>
  <rr:ExchangeFee contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="iso4217_USD" decimals="2" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_7">5.00</rr:ExchangeFee>
  <rr:ExpenseExampleYear01 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="iso4217_USD" decimals="0" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_20">46</rr:ExpenseExampleYear01>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_53">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:ExpenseExampleYear03 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="iso4217_USD" decimals="0" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_21">144</rr:ExpenseExampleYear03>
  <rr:BarChartLowestQuarterlyReturn contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="pure" decimals="4" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_55">0.0000</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2004 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="pure" decimals="4" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_40">0.0075</rr:AnnualReturn2004>
  <rr:FeeWaiverOrReimbursementOverAssets contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="pure" decimals="4" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_15">-0.0001</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:AnnualReturn2010 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="pure" decimals="4" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_46">0.0001</rr:AnnualReturn2010>
  <rr:ExpenseExampleYear10 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="iso4217_USD" decimals="0" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_23">567</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear05 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="iso4217_USD" decimals="0" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_22">252</rr:ExpenseExampleYear05>
  <rr:AnnualReturn2007 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="pure" decimals="4" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_43">0.0326</rr:AnnualReturn2007>
  <rr:BarChartHighestQuarterlyReturn contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="pure" decimals="4" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_52">0.0083</rr:BarChartHighestQuarterlyReturn>
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  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_16">1996-05-08</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
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  <rr:AverageAnnualReturnYear05 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="pure" decimals="4" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_60">0.0107</rr:AverageAnnualReturnYear05>
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  <rr:AnnualReturn2006 contextRef="eol_0000717341-12-000043_STD_1_20121101_0_602228x-9980343_602238x-9980340_602488x-9980347" unitRef="pure" decimals="4" id="id_399717_854B60BE-6DA3-4269-BFB6-85C28D3207D8_1002_42">0.0299</rr:AnnualReturn2006>
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