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  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Automated Cash Management Trust (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide stability of principal and current income consistent with stability of principal. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Class R Shares (R) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES &lt;/&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;/font&gt; &lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). &lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Automated Government Money Trust (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide stability of principal and current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include: &lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's R class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400. &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees ( fees paid directly from your investment)&lt;/b&gt; &lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) &lt;/b&gt; &lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Automated Cash Management Trust - R Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;br/&gt;&lt;br/&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's R class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;/font&gt; &lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's R class highest quarterly return was 1.09% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011). &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's R class 7-Day Net Yield as of December 31, 2011 was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury securities. These investments include repurchase agreements collateralized fully by U.S. Treasury securities. &lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;br/&gt;&lt;br/&gt; Because the Fund refers to government investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to normally invest less than 80% of its assets (plus any borrowings for investment purposes) in government investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; The bar chart shows the variability of the Fund's R class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's R class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; 1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk.&lt;/strong&gt; Prices of U.S. Treasury securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of U.S. Treasury securities with longer maturities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk. &lt;/strong&gt;A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/strong&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="USD">144</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="USD">446</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="USD">771</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="USD">1691</rr:ExpenseExampleYear10>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's Shares total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member">2006-09-29</rr:AverageAnnualReturnInceptionDate>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's Shares total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Automated Government Money Trust&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's highest quarterly return was 1.19% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended June 30, 2010).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's  R class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table &lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's 7-Day Net Yield as of December 31, 2011, was 0.00%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Automated Cash Management Trust (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide stability of principal and current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Service Shares (SS) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Credit Enhancement Risk. &lt;/b&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk of Foreign Investing.&lt;/b&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Prepayment Risk.&lt;/b&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/b&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost. &lt;/b&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield. &lt;/b&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Automated Cash Management Trust - SS Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's SS class highest quarterly return was 1.22% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's SS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member">2010-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedAutomatedGovernmentMoneyTrust column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedAutomatedGovernmentMoneyTrust column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's R class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedAutomatedGovernmentMoneyTrustBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedAutomatedGovernmentMoneyTrust column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include: &lt;/font&gt;</rr:RiskMoneyMarketFund>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="2"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include: &lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="USD">131</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="USD">409</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="USD">708</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="USD">1556</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="USD">100</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="USD">312</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="USD">542</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="USD">1201</rr:ExpenseExampleYear10>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member">2005-02-25</rr:AverageAnnualReturnInceptionDate>
  <dei:DocumentEffectiveDate contextRef="Duration_01Oct2011_30Sep2012">2012-09-28</dei:DocumentEffectiveDate>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedGovernmentReservesFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide stability of principal and current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Cash II Shares (CII) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedGovernmentReservesFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedGovernmentReservesFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedAutomatedCashManagementTrust column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less. &lt;br /&gt;&lt;br /&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. &lt;br /&gt;&lt;br /&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedGovernmentReservesFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedAutomatedCashManagementTrustBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Master Trust (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedGovernmentReservesFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are based on the contractual limitation as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). &lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Credit Enhancement Risk. &lt;/b&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk of Foreign Investing.&lt;/b&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Prepayment Risk.&lt;/b&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/b&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost. &lt;/b&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield. &lt;/b&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's total returns on a calendar year-by-year basis. The Average Annual Total Return table shows the returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.  &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Master Trust &lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's highest quarterly return was 1.26% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;br/&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Sector Risk. &lt;/b&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Credit Enhancement Risk. &lt;/b&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk of Foreign Investing.&lt;/b&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Prepayment Risk.&lt;/b&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/b&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost. &lt;/b&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield. &lt;/b&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's CII class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Automated Cash Management Trust - CII Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's 7-Day Net Yield as of December 31, 2011, was 0.00%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's CII class Average Annual Total Returns for the calendar period ended December 31, 2011. &lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedAutomatedCashManagementTrust column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CII class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund&amp;#8217;s CII class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="USD">142</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="USD">440</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="USD">761</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="USD">1669</rr:ExpenseExampleYear10>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CII class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's CII class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member">2005-02-25</rr:AverageAnnualReturnInceptionDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member">2007-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member">2011-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="USD">51</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="USD">160</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="USD">280</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="USD">628</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="USD">125</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="USD">390</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="USD">676</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="USD">1489</rr:ExpenseExampleYear10>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Government Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Institutional Shares (IS) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;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 periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury and government securities. These investments include repurchase agreements collateralized fully by U.S. Treasury and government securities. The Fund limits its investments to those that would enable it to qualify as a permissible investment for federally chartered credit unions. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Because the Fund refers to government investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to invest, under normal circumstances, less than 80% of its net assets (plus any borrowings for investment purposes) in government investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li &gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;   &lt;ul type="square"&gt;&lt;li &gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;   &lt;ul type="square"&gt;&lt;li &gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;   &lt;ul type="square"&gt;&lt;li &gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk.&lt;/strong&gt; The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below its current market value. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;   &lt;ul type="square"&gt;&lt;li &gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li &gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;   &lt;ul type="square"&gt;&lt;li &gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Government Obligations Fund - IS Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.01%. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 1.30% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended June 30, 2011). &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's IS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Government Reserves Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal and liquidity.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (Fees paid directly from your investment)&lt;/b&gt; &lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) &lt;/b&gt; &lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">October 1, 2013</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus. &lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury and government securities. These investments include repurchase agreements collateralized fully by U.S. Treasury and government securities.  &lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. &lt;br/&gt;&lt;br/&gt; In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). &lt;br/&gt;&lt;br/&gt;Because the Fund refers to government investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to invest, under normal circumstances, less than 80% of its net assets (plus any borrowings for investment purposes) in government invetments. &lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.  &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk. &lt;/strong&gt;A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk.&lt;/strong&gt; The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below its current market value.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/strong&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's Shares total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns averaged over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an &lt;/em&gt;indication&lt;em&gt; of future results&lt;/em&gt;. Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling the Fund at 1-800-341-7400. &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; The bar chart shows the variability of the Fund's Shares total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">1-800-341-7400</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an &lt;/em&gt;indication&lt;em&gt; of future results&lt;/em&gt;.&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Government Reserves Fund&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's highest quarterly return was 1.10% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended June 30, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table &lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's Shares 7-Day Net Yield as of December 31, 2011, was 0.00%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Municipal Trust (the "Fund") &lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's Shares 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009529_Member">1-800-341-7400</rr:MoneyMarketSevenDayYieldPhone>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income which is (exempt from federal regular income tax) consistent with stability of principal. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Municipal Trust&lt;/font&gt;</rr:BarChartHeading>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;/font&gt;&lt;br /&gt;&lt;br /&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term, high-quality, tax-exempt securities. The Fund will invest its assets so that, normally, distributions of annual interest income are exempt from federal regular income tax. Interest from the Fund's investments may be subject to the federal alternative minimum tax for individuals and corporations (AMT). The Fund invests in a portfolio of securities maturing in 397 days or less.&lt;/font&gt; &lt;br /&gt;&lt;br /&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Tax-exempt securities are fixed-income securities that, in the opinion of bond counsel to the issuer or on the basis of another authority believed by the Fund's investment adviser to be reliable, pay interest that is not subject to federal regular income taxes. The types of securities in which the Fund may principally invest include: (a) tax-exempt securities, such as the following types, some of which may be subject to credit enhancement: variable rate demand instruments, municipal notes, general obligation bonds, special revenue bonds, private activity bonds, and tax-exempt commercial paper; and (b) interests in securities of other investment companies.&lt;/font&gt; &lt;br /&gt;&lt;br /&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt; &lt;br /&gt;&lt;br /&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Because the Fund refers to municipal investments in its name, it has an investment policy that it will normally invest its assets so that at least 80% of the annual interest income that it distributes will be exempt from federal regular income tax. This policy may not be changed without shareholder approval.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities (including tax-exempt securities) generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk. &lt;/strong&gt;The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below or above its current market value. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued or credit enhanced by companies in similar businesses or with other similar characteristics. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these issuers or entities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Tax Risk.&lt;/strong&gt; In order to be tax exempt, tax-exempt securities must meet certain legal requirements. Failure to meet such requirements may cause the interest received and distributed by the Fund to shareholders to be taxable.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank or bond insurer) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such an enhancement provider. Adverse developments in the banking or bond insurance industries also may negatively affect the Fund. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/strong&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the yield of the securities purchased is less than that of the securities already in the Fund's portfolio, or if the Fund holds cash, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. In the unlikely event that the Fund's Board of Trustees&lt;/strong&gt; ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per share and its market-based NAV per share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged &lt;/em&gt;over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling the Fund at 1-800-341-7400. &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%. &lt;/font&gt;&lt;br /&gt;&lt;br /&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the period shown in the bar chart, the Fund's highest quarterly return was 0.72% (quarter ended June 30, 2007). Its lowest quarterly return was 0.00% (quarter ended June 30, 2011). &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's Average Annual Total Returns for the calendar periods ended December 31, 2011. &lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's 7-Day Net Yield as of December 31, 2011 was 0.00%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; The bar chart shows the variability of the Fund's total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com	&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member">2011-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; The bar chart shows the variability of the Fund's total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt; &lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font.</rr:PerformancePastDoesNotIndicateFuture>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member">2011-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="USD">135</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="USD">421</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="USD">729</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="USD">1601</rr:ExpenseExampleYear10>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member">2005-02-25</rr:AverageAnnualReturnInceptionDate>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Capital Reserves Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedGovernmentObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedMasterTrust column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedGovernmentObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedMasterTrust column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;risk/return summary: Fees and Expenses &lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedGovernmentObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedMasterTrust column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedGovernmentObligationsFundClassInstitutionalBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedMunicipalTrust column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedMasterTrustBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal and liquidity.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedMunicipalTrust column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedGovernmentObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table shown below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's Shares total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.&lt;/em&gt; Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling the Fund at 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Capital Reserves Fund&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the period shown in the bar chart, the Fund's highest quarterly return was 1.12% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009530_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedMasterTrust column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's Shares Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's 7-Day Net Yield as of December 31, 2011, was 0.00%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Automated Cash Management Trust (the "Fund")&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's Shares total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.&lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedMunicipalTrustBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedMunicipalTrust column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedAutomatedCashManagementTrustClassII column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedCapitalReservesFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES &lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedCapitalReservesFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedCapitalReservesFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedCapitalReservesFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009546_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedCapitalReservesFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedAutomatedCashManagementTrustClassII column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedAutomatedCashManagementTrustClassIIBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009531_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedMunicipalTrust column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member">2005-01-18</rr:AverageAnnualReturnInceptionDate>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedGovernmentObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedGovernmentObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedGovernmentObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedGovernmentObligationsFundClassCapitalBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedGovernmentObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedAutomatedCashManagementTrustClassII column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedAutomatedCashManagementTrustClassII column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CII class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's CII class highest quarterly return was 1.18% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;Federated Government Obligations Fund (the "Fund")&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Capital Shares (CAP) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) &lt;/b&gt; &lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;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 periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury and government securities. These investments include repurchase agreements collateralized fully by U.S. Treasury and government securities. The Fund limits its investments to those that would enable it to qualify as a permissible investment for federally chartered credit unions.&lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.  &lt;br/&gt;&lt;br/&gt; In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").  &lt;br/&gt;&lt;br/&gt;Because the Fund refers to government investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to invest, under normal circumstances, less than 80% of its net assets (plus any borrowings for investment purposes) in government investments. &lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.  &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk. &lt;/strong&gt;A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk.&lt;/strong&gt; The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below its current market value.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/strong&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.  &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Government Obligations Fund - CAP Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%. &lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's CAP class highest quarterly return was 1.28% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended March 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table &lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's CAP class Average Annual Total Returns for the calendar period ended December 31, 2011.  &lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.  &lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">October 1, 2013</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Liberty U.S. Government Money Market Trust&lt;/b&gt;&lt;/font&gt; (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share.&lt;br/&gt;&lt;br/&gt;The Fund's investment objective is to provide stability of principal and current income consistent with stability of principal. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Class A Shares (A), Class B Shares (B), Class C Shares (C) and Class F Shares (F) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees ( fees paid directly from your investment&lt;/b&gt;)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. Expenses assuming no redemption are also shown. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury and government securities. These investments include repurchase agreements collateralized fully by U.S. Treasury and government securities.&lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. &lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 (Rule 2a-7).&lt;br/&gt;&lt;br/&gt;Because the Fund refers to U.S. government investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to normally invest less than 80% of its assets (plus any borrowings for investment purposes) in U.S. government investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk.&lt;/strong&gt; The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below its current market value. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/b&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost. &lt;/b&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield. &lt;/b&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund's A class and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's A class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows the returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods, and includes comparative performance information. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results&lt;/em&gt;. Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.  &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Liberty U.S Government Money Market Trust - A Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's A class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%. &lt;br/&gt;&lt;br/&gt;Within the periods shown in the chart, the Fund's A class highest quarterly return was 1.12% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's A, B, C and F classes Average Annual Total Returns for the calendar periods ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's A, B, C and F classes 7-Day Net Yields as of December 31, 2011, were 0.00%, 0.00%, 0.00% and 0.00%, respectively. You may go to FederatedInvestors.com or call the Fund at 1800341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">1-800-341-7400</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Government Obligations Tax-Managed Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal and liquidity.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal and liquidity.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES &lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Service Shares (SS) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member">1-800-341-7400</rr:MoneyMarketSevenDayYieldPhone>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are&lt;strong&gt; &lt;/strong&gt;as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury and government securities that pay interest exempt from state personal income tax. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Bank System and Tennessee Valley Authority. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government. Finally, the Fund may invest in government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities, including the Farm Credit System.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Because the Fund refers to government investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to normally invest less than 80% of its assets (plus any borrowings for investment purposes) in government investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Government Obligations Tax-Managed Fund -	IS Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include: &lt;/font&gt;   &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;   &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk.&lt;/strong&gt; The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below its current market value.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;   &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:-20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Government Obligations Tax-Managed Fund - SS Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's SS class highest quarterly return was 1.22% (quarter ended September 30, 2006). Its lowest quarterly return was 0.00% (quarter ended September 30, 2009).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's SS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Government Obligations Tax-Managed Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) &lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES &lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="USD">55</rr:ExpenseExampleYear01>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Institutional Shares (IS) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="USD">173</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;br /&gt;&lt;br /&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="USD">302</rr:ExpenseExampleYear05>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury and government securities that pay interest exempt from state personal income tax. &lt;br /&gt;&lt;br /&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Bank System and Tennessee Valley Authority. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government. Finally, the Fund may invest in government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities, including the Farm Credit System. &lt;br /&gt;&lt;br /&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). &lt;br /&gt;&lt;br /&gt;Because the Fund refers to government investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to normally invest less than 80% of its assets (plus any borrowings for investment purposes) in government investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="USD">677</rr:ExpenseExampleYear10>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk.&lt;/strong&gt; The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below its current market value. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.  &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.&lt;/em&gt; Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.  &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%. &lt;br /&gt;&lt;br /&gt;Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 1.28% (quarter ended September 30, 2006). Its lowest quarterly return was 0.00% (quarter ended March 31, 2011). &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's IS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Government Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Trust Shares (TR) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;br/&gt;&lt;br/&gt;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 periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury and government securities. These investments include repurchase agreements collateralized fully by U.S. Treasury and government securities. The Fund limits its investments to those that would enable it to qualify as a permissible investment for federally chartered credit unions. &lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. &lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). &lt;br/&gt;&lt;br/&gt;Because the Fund refers to government investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to invest, under normal circumstances, less than 80% of its net assets (plus any borrowings for investment purposes) in government investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="USD">55</rr:ExpenseExampleYear01>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="USD">173</rr:ExpenseExampleYear03>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk.&lt;/strong&gt; The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below its current market value. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency. &lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="USD">302</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="USD">677</rr:ExpenseExampleYear10>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's TR class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Government Obligations Fund - TR Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%. &lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's TR class highest quarterly return was 1.18% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended June 30, 2009).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's TR class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency. &lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's TR class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. &lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.&lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="USD">132</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="USD">308</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="USD">232</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="USD">412</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="USD">643</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="USD">512</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="USD">713</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="USD">1103</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="USD">713</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="USD">1568</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="USD">2379</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="USD">1568</rr:ExpenseExampleYear10>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Municipal Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="USD">758</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="USD">1043</rr:ExpenseExampleYear03>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="USD">1303</rr:ExpenseExampleYear05>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="USD">2187</rr:ExpenseExampleYear10>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member">2009-06-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:ExpenseExampleNoRedemptionYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="USD">132</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleNoRedemptionYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="USD">208</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleNoRedemptionYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="USD">208</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleNoRedemptionYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="USD">132</rr:ExpenseExampleNoRedemptionYear01>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="USD">412</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="USD">643</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="USD">643</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="USD">412</rr:ExpenseExampleNoRedemptionYear03>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="USD">713</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="USD">1103</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="USD">1103</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="USD">713</rr:ExpenseExampleNoRedemptionYear05>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="USD">1568</rr:ExpenseExampleNoRedemptionYear10>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="USD">2187</rr:ExpenseExampleNoRedemptionYear10>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="USD">2379</rr:ExpenseExampleNoRedemptionYear10>
  <rr:ExpenseExampleNoRedemptionYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="USD">1568</rr:ExpenseExampleNoRedemptionYear10>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member">2006-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member">2009-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member">2005-05-02</rr:AverageAnnualReturnInceptionDate>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member">2005-05-02</rr:AverageAnnualReturnInceptionDate>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Money Market Management (the "Fund") &lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member">2003-02-19</rr:AverageAnnualReturnInceptionDate>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES &lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Eagle Shares (EAG) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;/font&gt;&lt;br /&gt;&lt;br /&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;/font&gt; &lt;br /&gt;&lt;br /&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;/font&gt; &lt;br /&gt;&lt;br /&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; &lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; &lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; &lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's EAG class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400. &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Money Market Management - EAG Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Government Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's EAG class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%. &lt;/font&gt;&lt;br /&gt;&lt;br /&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's EAG class highest quarterly return was 1.13% (quarter ended December 31, 2007). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011). &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Service Shares (SS) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's EAG class Average Annual Total Returns for the calendar period ended December 31, 2011. &lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's EAG class 7-Day Net Yield as of December 31, 2011, was 0.00%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedGovernmentObligationsFundClassTrust column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;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 periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury and government securities. These investments include repurchase agreements collateralized fully by U.S. Treasury and government securities. The Fund limits its investments to those that would enable it to qualify as a permissible investment for federally chartered credit unions. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). &lt;/font&gt;&lt;br/&gt;&lt;br/&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Because the Fund refers to government investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to invest, under normal circumstances, less than 80% of its net assets (plus any borrowings for investment purposes) in government investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include: &lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's EAG class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk.&lt;/strong&gt; The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below its current market value.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">1-800-341-7400</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's EAG class 7-Day Net Yield as of December 31, 2011</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">1-800-341-7400</rr:MoneyMarketSevenDayYieldPhone>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedGovernmentObligationsFundClassTrust column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedGovernmentObligationsTaxManagedFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income exempt from all federal regular income tax consistent with stability of principal. The Fund's investment objective may be changed by the Fund's Board of Trustees ("Board") without shareholder approval.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedGovernmentObligationsFundClassTrust column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Institutional Shares (IS) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term, high-quality, tax-exempt securities. The Fund will invest its assets so that, normally, distributions of annual interest income are exempt from federal regular income tax. Interest from the Fund's investments may be subject to the federal alternative minimum tax for individuals and corporations (AMT). The Fund invests in a portfolio of securities maturing in 397 days or less.&lt;br/&gt;&lt;br/&gt;Tax-exempt securities are fixed-income securities that, in the opinion of bond counsel to the issuer or on the basis of another authority believed by the Fund's investment adviser to be reliable, pay interest that is not subject to federal regular income taxes. The types of securities in which the Fund may principally invest include: (a) tax-exempt securities such as the following types, some of which may be subject to credit enhancement: variable rate demand instruments, municipal notes, general obligation bonds, special revenue bonds, private activity bonds and tax-exempt commercial paper; and (b) interests in securities of other investment companies.&lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). The Adviser may invest in securities subject to the federal AMT for individuals and corporations in an attempt to seek appropriate risk-adjusted returns and provide diversification.&lt;br/&gt;&lt;br/&gt;Because the Fund refers to municipal investments in its name, it has an investment policy that it will normally invest its assets so that at least 80% of the income that it distributes will be exempt from federal regular income tax. This policy may not be changed without shareholder approval.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Prices of fixed-income securities (including tax-exempt securities) generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Call Risk. &lt;/b&gt;The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below or above its current market value.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Sector Risk. &lt;/b&gt;A substantial part of the Fund's portfolio may be comprised of securities issued or credit enhanced by companies in similar businesses or with other similar characteristics.&lt;b&gt; &lt;/b&gt;As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these issuers or entities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Tax Risk.&lt;/b&gt; In order to be tax exempt, tax-exempt securities must meet certain legal requirements. Failure to meet such requirements may cause the interest received and distributed by the Fund to shareholders to be taxable.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Credit Enhancement Risk. &lt;/b&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank or bond insurer) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such an enhancement provider. Adverse developments in the banking or bond insurance industries also may negatively affect the Fund.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/b&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the yield of the securities purchased is less than that of the securities already in the Fund's portfolio, or if the Fund holds cash, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost. In the unlikely event that the Fund's Board of Trustees&lt;/b&gt; ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per share and its market-based NAV per share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield. &lt;/b&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedGovernmentObligationsTaxManagedFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Municipal Obligations Fund - IS Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.07%. &lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 0.91% (quarter ended June 30, 2007). Its lowest quarterly return was 0.04% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedGovernmentObligationsFundClassTrustBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's IS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011, was 0.13%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedGovernmentObligationsTaxManagedFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.&lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; up to but not including the later of (the "Termination Date"): (a) October 1, 2013 or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; The bar chart shows the variability of the Fund's A class total returns on a calendar year-by-year basis.  &lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedGovernmentObligationsFundClassTrust column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results&lt;/em&gt;.&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's A, B, C and F classes 7-Day Net Yields as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1800341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's A class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's EAG class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member">2007-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member">2007-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member">2011-03-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedGovernmentObligationsTax-ManagedFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedGovernmentObligationsTaxManagedFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="USD">238</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="USD">733</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="USD">1255</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="USD">2686</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="USD">80</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="USD">249</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="USD">433</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="USD">966</rr:ExpenseExampleYear10>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedLibertyUSGovernmentMoneyMarketTrust column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedLibertyUSGovernmentMoneyMarketTrust column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleTransposedFederatedLibertyUSGovernmentMoneyMarketTrust column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="USD">55</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="USD">173</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="USD">302</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="USD">677</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleNoRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleNoRedemptionTransposedFederatedLibertyUSGovernmentMoneyMarketTrust column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleNoRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedLibertyU.S.GovernmentMoneyMarketTrustBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsTransposedFederatedLibertyUSGovernmentMoneyMarketTrust column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="USD">55</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="USD">173</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="USD">302</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="USD">677</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="USD">238</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="USD">733</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="USD">1255</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="USD">2686</rr:ExpenseExampleYear10>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedGovernmentObligationsTaxManagedFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member">2008-07-28</rr:AverageAnnualReturnInceptionDate>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400. &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Government Obligations Fund - SS Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedGovernmentObligationsTaxManagedFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's SS class highest quarterly return was 1.24% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended March 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Money Market Management (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's SS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Premier Shares (PRE) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. &lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedGovernmentObligationsTaxManagedFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's PRE class total returns on a calendar year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Money Market Management - PRE Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's PRE class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the period shown in the bar chart, the Fund's PRE class highest quarterly return was 0.38% (quarter ended March 31, 2009). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's PRE class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's PRE class 7-Day Net Yield as of December 31, 2011, was 0.00%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009538_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedGovernmentObligationsTax-ManagedFundClassInstitutionalBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedGovernmentObligationsTaxManagedFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member">2011-03-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedMunicipalObligationsFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; The bar chart shows the variability of the Fund's PRE class total returns on a calendar year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">1-800-341-7400</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedMunicipalObligationsFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's PRE class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">1-800-341-7400</rr:MoneyMarketSevenDayYieldPhone>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's PRE class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member">2009-03-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedMunicipalObligationsFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedMoneyMarketManagement column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedMunicipalObligationsFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedMoneyMarketManagementBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedMunicipalObligationsFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedMoneyMarketManagement column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Municipal Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income exempt from all federal regular income tax consistent with stability of principal. The Fund's investment objective may be changed by the Fund's Board of Trustees ("Board") without shareholder approval. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Service Shares (SS) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt; &lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) &lt;/b&gt; &lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term, high-quality, tax-exempt securities. The Fund will invest its assets so that, normally, distributions of annual interest income are exempt from federal regular income tax. Interest from the Fund's investments may be subject to the federal alternative minimum tax for individuals and corporations (AMT). The Fund invests in a portfolio of securities maturing in 397 days or less.  &lt;br/&gt;&lt;br/&gt;Tax-exempt securities are fixed-income securities that, in the opinion of bond counsel to the issuer or on the basis of another authority believed by the Fund's investment adviser to be reliable, pay interest that is not subject to federal regular income taxes. The types of securities in which the Fund may principally invest include: (a) tax-exempt securities such as the following types, some of which may be subject to credit enhancement: variable rate demand instruments, municipal notes, general obligation bonds, special revenue bonds, private activity bonds and tax-exempt commercial paper; and (b) interests in securities of other investment companies.  &lt;br/&gt;&lt;br/&gt; In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). The Adviser may invest in securities subject to the federal AMT for individuals and corporations in an attempt to seek appropriate risk-adjusted returns and provide diversification. &lt;br/&gt;&lt;br/&gt;Because the Fund refers to municipal investments in its name, it has an investment policy that it will normally invest its assets so that at least 80% of the income that it distributes will be exempt from federal regular income tax. This policy may not be changed without shareholder approval. &lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.  &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.  &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities (including tax-exempt securities) generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk. &lt;/strong&gt;The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below or above its current market value.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued or credit enhanced by companies in similar businesses or with other similar characteristics.&lt;strong&gt; &lt;/strong&gt;As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these issuers or entities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Tax Risk.&lt;/strong&gt; In order to be tax exempt, tax-exempt securities must meet certain legal requirements. Failure to meet such requirements may cause the interest received and distributed by the Fund to shareholders to be taxable.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank or bond insurer) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such an enhancement provider. Adverse developments in the banking or bond insurance industries also may negatively affect the Fund.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/strong&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the yield of the securities purchased is less than that of the securities already in the Fund's portfolio, or if the Fund holds cash, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per share and its market-based NAV per share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency. &lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.  &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Municipal Obligations Fund - SS Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's SS class highest quarterly return was 0.85% (quarter ended June 30, 2007). Its lowest quarterly return was 0.00% (quarter ended September 30, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table &lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's SS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedMoneyMarketManagementPremierClass column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return &lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member">2006-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member">2011-03-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus. &lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency. &lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis.	&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedMoneyMarketManagementPremierClass column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedMoneyMarketManagementPremierClass column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member">2007-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member">2011-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedMoneyMarketManagementPremierClassBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedMoneyMarketManagementPremierClass column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Municipal Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income exempt from all federal regular income tax consistent with stability of principal. The Fund's investment objective may be changed by the Fund's Board of Trustees ("Board") without shareholder approval.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Capital Shares (CAP) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term, high-quality, tax-exempt securities. The Fund will invest its assets so that, normally, distributions of annual interest income are exempt from federal regular income tax. Interest from the Fund's investments may be subject to the federal alternative minimum tax for individuals and corporations (AMT). The Fund invests in a portfolio of securities maturing in 397 days or less.&lt;br/&gt;&lt;br/&gt;Tax-exempt securities are fixed-income securities that, in the opinion of bond counsel to the issuer or on the basis of another authority believed by the Fund's investment adviser to be reliable, pay interest that is not subject to federal regular income taxes. The types of securities in which the Fund may principally invest include: (a) tax-exempt securities such as the following types, some of which may be subject to credit enhancement: variable rate demand instruments, municipal notes, general obligation bonds, special revenue bonds, private activity bonds and tax-exempt commercial paper; and (b) interests in securities of other investment companies. &lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). The Adviser may invest in securities subject to the federal AMT for individuals and corporations in an attempt to seek appropriate risk-adjusted returns and provide diversification. &lt;br/&gt;&lt;br/&gt;Because the Fund refers to municipal investments in its name, it has an investment policy that it will normally invest its assets so that at least 80% of the income that it distributes will be exempt from federal regular income tax. This policy may not be changed without shareholder approval.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Prices of fixed-income securities (including tax-exempt securities) generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk. &lt;/strong&gt;The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below or above its current market value.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued or credit enhanced by companies in similar businesses or with other similar characteristics.&lt;strong&gt; &lt;/strong&gt;As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these issuers or entities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Tax Risk.&lt;/strong&gt; In order to be tax exempt, tax-exempt securities must meet certain legal requirements. Failure to meet such requirements may cause the interest received and distributed by the Fund to shareholders to be taxable.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank or bond insurer) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such an enhancement provider. Adverse developments in the banking or bond insurance industries also may negatively affect the Fund. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/strong&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the yield of the securities purchased is less than that of the securities already in the Fund's portfolio, or if the Fund holds cash, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost. &lt;/b&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield. &lt;/b&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.  &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Municipal Obligations Fund - CAP Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.02%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's CAP class highest quarterly return was 0.89% (quarter ended June 30, 2007). Its lowest quarterly return was 0.01% (quarter ended March 31, 2010).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's CAP class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011, was 0.03%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedMunicipalObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

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  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedMunicipalObligationsFundClassInstitutionalBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="USD">55</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="USD">173</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="USD">302</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="USD">677</rr:ExpenseExampleYear10>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedGovernmentObligationsFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedGovernmentObligationsFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedGovernmentObligationsFund column period compact * ~&lt;/div&gt;

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  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedGovernmentObligationsFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedGovernmentObligationsFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis. &lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member">2007-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member">2010-03-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedMunicipalObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedMunicipalObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedMunicipalObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedMunicipalObligationsFundClassCapitalBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedMunicipalObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedMunicipalObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Prime Cash Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal and liquidity.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Institutional Shares (IS) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include: &lt;/font&gt;   &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;   &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities. &lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;   &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider. &lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;  &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table shown below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400. &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Cash Obligations Fund - IS Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.10%. &lt;/font&gt; &lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 1.33% (quarter ended September 30, 2007). Its lowest quarterly return was 0.03% (quarter ended September 30, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's IS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011, was 0.21%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus. &lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member">2011-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedPrimeCashObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

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  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedPrimeCashObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

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  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedPrimeCashObligationsFundClassInstitutionalBarChart column period compact * ~&lt;/div&gt;

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  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedPrimeCashObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

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  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedPrimeCashObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedMunicipalObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

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  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedMunicipalObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

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  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Prime Cash Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal and liquidity.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Capital Shares (CAP) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees &lt;i&gt;( fees paid directly from your investment)&lt;/i&gt;&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less. &lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. &lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Sector Risk. &lt;/b&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Credit Enhancement Risk. &lt;/b&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk of Foreign Investing.&lt;/b&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Prepayment Risk.&lt;/b&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/b&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost. &lt;/b&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield. &lt;/b&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table shown below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Cash Obligations Fund - CAP Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class total return for the six-month period from January 1, 2012 to June 30, 2012,was 0.05%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's CAP class highest quarterly return was 1.30% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended September 30, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's CAP class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011, was 0.11%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedMoneyMarketManagement column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;Federated Prime Cash Obligations Fund (the "Fund") &lt;/font&gt;</rr:RiskReturnHeading>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member">2011-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal and liquidity.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Service Shares (SS) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedMoneyMarketManagement column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include: &lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Sector Risk. &lt;/b&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Credit Enhancement Risk. &lt;/b&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table shown below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Cash Obligations Fund - SS Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's SS class highest quarterly return was 1.27% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011). &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's SS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="USD">56</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="USD">176</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="USD">307</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="USD">689</rr:ExpenseExampleYear10>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedPrimeCashObligationsFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedPrimeCashObligationsFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedPrimeCashObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedPrimeCashObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedPrimeCashObligationsFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedPrimeCashObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedPrimeCashObligationsFundClassCapitalBarChart column period compact * ~&lt;/div&gt;

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  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Prime Management Obligations Fund (the "Fund") &lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedPrimeCashObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedPrimeCashObligationsFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Management Obligations Fund - IS Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Institutional Shares (IS) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;/font&gt;&lt;br /&gt;&lt;br /&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;/font&gt; &lt;br /&gt;&lt;br /&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;/font&gt; &lt;br /&gt;&lt;br /&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk.&lt;/strong&gt;  The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt;  Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk. &lt;/strong&gt;The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/strong&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt;  In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.11%. &lt;/font&gt;&lt;br /&gt;&lt;br /&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 1.33% (quarter ended September 30, 2007). Its lowest quarterly return was 0.03% (quarter ended September 30, 2011). &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's IS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011, was 0.22%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;i&gt;averaged&lt;/i&gt; over the stated periods. &lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.&lt;/i&gt; Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Prime Management Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES &lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Service Shares (SS) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Management Obligations Fund - SS Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt; Within the periods shown in the bar chart, the Fund's SS class highest quarterly return was 1.26% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's SS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com	&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Prime Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Institutional Shares (IS) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member">2011-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="USD">56</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="USD">176</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="USD">307</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="USD">689</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member">2005-01-18</rr:AverageAnnualReturnInceptionDate>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include: &lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.&lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Obligations Fund - IS Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="USD">56</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="USD">176</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="USD">307</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="USD">689</rr:ExpenseExampleYear10>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.09%.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 1.32% (quarter ended September 30, 2007). Its lowest quarterly return was 0.02% (quarter ended March 31, 2010).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's IS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011, was 0.20%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member">2004-08-11</rr:AverageAnnualReturnInceptionDate>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedPrimeCashObligationsFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member">2010-03-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Prime Management Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment) &lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) &lt;/b&gt; &lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Management Obligations Fund - CAP Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table &lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Capital Shares (CAP) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedPrimeManagementObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.  &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk.&lt;/strong&gt; The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP  class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.06%.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's CAP class highest quarterly return was 1.30% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended September 30, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's CAP class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011, was 0.12%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;&lt;h3&gt;Federated Prime Obligations Fund (the "Fund") &lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Service Shares (SS) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less. &lt;br/&gt;&lt;br/&gt; Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. &lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").  &lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include: &lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Sector Risk. &lt;/b&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Credit Enhancement Risk. &lt;/b&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Obligations Fund - SS Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's SS class highest quarterly return was 1.25% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011). &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's SS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011 was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated  Prime Value Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal and liquidity. The Fund's investment objective may be changed by the Fund's Trustees without shareholder approval.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Institutional Shares (IS) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns averaged over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member">2011-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Value Obligations Fund - IS class &lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.11%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 1.33% (quarterended September 30, 2007). Its lowest quarterly return was 0.03% (quarter ended September 30, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's IS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011, was 0.21%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Prime Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Trust Shares (TR) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less. &lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities. &lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Sector Risk. &lt;/b&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Credit Enhancement Risk. &lt;/b&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk of Foreign Investing.&lt;/b&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Prepayment Risk.&lt;/b&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/b&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost. &lt;/b&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield. &lt;/b&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's TR class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026159_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Obligations Fund - TR Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026159_MemberInstitutionalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class total return for the six-month period from January 1, 2012 to June 30, 2012 was 0.00%. &lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's TR class highest quarterly return was 1.19% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026159_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026159_MemberInstitutionalShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's TR class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026159_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class 7-Day Net Yield as of December 31, 2011 was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026159_MemberInstitutionalShares_Member">2011-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedPrimeManagementObligationsFundClassInstitutionalBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026161_MemberCapitalShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026161_MemberCapitalShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026161_MemberCapitalShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026161_MemberCapitalShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's TR class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026158_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedPrimeObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026158_MemberTrustShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026158_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026158_MemberTrustShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026158_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026158_MemberTrustShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedPrimeObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
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  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member" unitRef="USD">55</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member" unitRef="USD">173</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member" unitRef="USD">302</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member" unitRef="USD">677</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026159_MemberInstitutionalShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026159_MemberInstitutionalShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026159_MemberInstitutionalShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
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  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member">2005-01-18</rr:AverageAnnualReturnInceptionDate>
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</rr:ShareholderFeesTableTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026158_MemberTrustShares_Member" unitRef="USD">80</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026158_MemberTrustShares_Member" unitRef="USD">249</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026158_MemberTrustShares_Member" unitRef="USD">433</rr:ExpenseExampleYear05>
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  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026158_MemberTrustShares_Member">2003-02-19</rr:AverageAnnualReturnInceptionDate>
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  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Tax-Free Obligations Fund (the "Fund") &lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide dividend income exempt from federal regular income tax consistent with stability of principal. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
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  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES &lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Institutional Shares (IS) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
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  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Tax-Free Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide dividend income exempt from federal regular income tax consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Service Shares (SS) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term, high-quality, tax-exempt securities. The Fund will invest its assets so that distributions of annual interest income are exempt from federal regular income tax. The Fund's investment Adviser ("Adviser") also will invest the Fund's assets entirely in securities whose interest is not subject to (or not a specific preference item for purposes of) the federal alternative minimum tax for individuals and corporations (AMT), such that distributions of annual interest income also are exempt from the AMT. The Fund invests in a portfolio of securities maturing in 397 days or less.&lt;br/&gt;&lt;br/&gt;Tax-exempt securities are fixed-income securities that, in the opinion of bond counsel to the issuer or on the basis of another authority believed by the Fund's investment adviser to be reliable, pay interest that is not subject to federal regular income taxes. The types of securities in which the Fund may principally invest include: (a) tax-exempt securities such as the following types, some of which may be subject to credit enhancement: variable rate demand instruments, municipal notes, general obligation bonds, special revenue bonds, private activity bonds and tax-exempt commercial paper; and (b) interests in securities of other investment companies.&lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;br/&gt;&lt;br/&gt;The Fund has an investment policy that it will invest its assets so that at least 80% of the income that it distributes will be exempt from federal regular income tax. (Federal regular income tax does not include the federal alternative minimum tax or the federal alternative minimum tax for corporations.) Because the Fund refers to tax-free investments in its name, the Fund also will invest its assets so that at least 80% of the income it distributes will be exempt from federal income tax. This policy may not be changed without shareholder approval.&lt;br/&gt;&lt;br/&gt;In addition to its fundamental investment policies, the Adviser also will invest the Fund's assets entirely in securities whose interest is not subject to (or not a specific preference item for purposes of) the AMT, such that distributions of annual interest income also are exempt from the AMT.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk. &lt;/b&gt;Prices of fixed-income securities (including tax-exempt securities) generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Call Risk. &lt;/b&gt;The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below or above its current market value.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Sector Risk. &lt;/b&gt;A substantial part of the Fund's portfolio may be comprised of securities issued or credit enhanced by companies in similar businesses or with other similar characteristics.&lt;strong&gt; &lt;/strong&gt;As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these issuers or entities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Tax Risk.&lt;/b&gt; In order to be tax exempt, tax-exempt securities must meet certain legal requirements. Failure to meet such requirements may cause the interest received and distributed by the Fund to shareholders to be taxable.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Credit Enhancement Risk. &lt;/b&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank or bond insurer) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such an enhancement provider. Adverse developments in the banking or bond insurance industries also may negatively affect the Fund. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/b&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the yield of the securities purchased is less than that of the securities already in the Fund's portfolio, or if the Fund holds cash, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost. In the unlikely event that the Fund's Board of Trustees&lt;/b&gt; ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per share and its market-based NAV per share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield. &lt;/b&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedPrimeManagementObligationsFundClassCapital column period compact * ~&lt;/div&gt;

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  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Tax-Free Obligations Fund- SS Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's SS class highest quarterly return was 0.83% (quarter ended June 30, 2007). Its lowest quarterly return was 0.00% (quarter ended March 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's SS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedPrimeManagementObligationsFundClassCapitalBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedPrimeManagementObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedPrimeObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES &lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedPrimeManagementObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedPrimeManagementObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term, high-quality, tax-exempt securities. The Fund will invest its assets so that distributions of annual interest income are exempt from federal regular income tax. The Fund's investment Adviser ("Adviser") also will invest the Fund's assets entirely in securities whose interest is not subject to (or not a specific preference item for purposes of) the federal alternative minimum tax for individuals and corporations (AMT), such that distributions of annual interest income also are exempt from the AMT. The Fund invests in a portfolio of securities maturing in 397 days or less.&lt;/font&gt; &lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Tax-exempt securities are fixed-income securities that, in the opinion of bond counsel to the issuer or on the basis of another authority believed by the Fund's investment adviser to be reliable, pay interest that is not subject to federal regular income taxes. The types of securities in which the Fund may principally invest include: (a) tax-exempt securities such as the following types, some of which may be subject to credit enhancement: variable rate demand instruments, municipal notes, general obligation bonds, special revenue bonds, private activity bonds and tax-exempt commercial paper; and (b) interests in securities of other investment companies. &lt;/font&gt; &lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). &lt;/font&gt; &lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund has an investment policy that it will invest its assets so that at least 80% of the income that it distributes will be exempt from federal regular income tax. (Federal regular income tax does not include the federal alternative minimum tax or the federal alternative minimum tax for corporations.) Because the Fund refers to tax-free investments in its name, the Fund also will invest its assets so that at least 80% of the income it distributes will be exempt from federal income tax. This policy may not be changed without shareholder approval. &lt;/font&gt; &lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In addition to its fundamental investment policies, the Adviser also will invest the Fund's assets entirely in securities whose interest is not subject to (or not a specific preference item for purposes of) the AMT, such that distributions of annual interest income also are exempt from the AMT. &lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Prime Value Obligations Fund (the "Fund") &lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal and liquidity. The Fund's investment objective may be changed by the Fund's Trustees without shareholder approval. &lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES &lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Service Shares (SS) of the Fund. &lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE &lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies? &lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less. &lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). &lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk.&lt;/b&gt; It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk.&lt;/b&gt; Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Liquidity Risk.&lt;/b&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Sector Risk.&lt;/b&gt; A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Credit Enhancement Risk.&lt;/b&gt; The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk of Foreign Investing.&lt;/b&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Prepayment Risk.&lt;/b&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/b&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost.&lt;/b&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield.&lt;/b&gt; There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns averaged over the stated periods. &lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.&lt;/i&gt; Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400. &lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Value Obligations Fund - SS Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%. &lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's SS class highest quarterly return was 1.27% (quarter ended September 30, 2007). Its lowest quarterly return was 0.00% (quarter ended March 31, 2011). &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's SS class Average Annual Total Returns for the calendar period ended December 31, 2011. &lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield. &lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency. &lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.&lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026160_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026160_MemberServiceShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026160_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026160_MemberServiceShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026160_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return &lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026160_MemberServiceShares_Member">2011-03-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400 &lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include: &lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency. &lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026160_MemberServiceShares_Member" unitRef="USD">55</rr:ExpenseExampleYear01>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026160_MemberServiceShares_Member" unitRef="USD">173</rr:ExpenseExampleYear03>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026160_MemberServiceShares_Member" unitRef="USD">302</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026160_MemberServiceShares_Member" unitRef="USD">677</rr:ExpenseExampleYear10>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedPrimeValueObligationsFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedPrimeValueObligationsFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026165_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026165_MemberServiceShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedPrimeValueObligationsFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026165_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Issuer Credit Risk. &lt;/strong&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities (including tax-exempt securities) generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Call Risk. &lt;/strong&gt;The Fund's performance may be adversely affected by the possibility that an issuer of a security held by the Fund may redeem the security prior to maturity at a price below or above its current market value. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued or credit enhanced by companies in similar businesses or with other similar characteristics.&lt;strong&gt; &lt;/strong&gt;As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these issuers or entities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Tax Risk.&lt;/strong&gt; In order to be tax exempt, tax-exempt securities must meet certain legal requirements. Failure to meet such requirements may cause the interest received and distributed by the Fund to shareholders to be taxable. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank or bond insurer) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such an enhancement provider. Adverse developments in the banking or bond insurance industries also may negatively affect the Fund. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/strong&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the yield of the securities purchased is less than that of the securities already in the Fund's portfolio, or if the Fund holds cash, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. In the unlikely event that the Fund's Board of Trustees&lt;/strong&gt; ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per share and its market-based NAV per share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:0px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026165_MemberServiceShares_Member">2007-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026165_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026165_MemberServiceShares_Member">2011-03-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Tax-Free Obligations Fund- IS Class &lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.02%.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 0.90% (quarter ended June 30, 2007). Its lowest quarterly return was 0.01% (quarter ended September 30, 2011). &lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedPrimeValueObligationsFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's IS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026165_MemberServiceShares_Member" unitRef="USD">55</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026165_MemberServiceShares_Member" unitRef="USD">173</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026165_MemberServiceShares_Member" unitRef="USD">302</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026165_MemberServiceShares_Member" unitRef="USD">677</rr:ExpenseExampleYear10>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011, was 0.02%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Prime Value Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal and liquidity. The Fund's investment objective may be changed by the Fund's Trustees without shareholder approval.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Capital Shares (CAP) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of high-quality, dollar-denominated, fixed-income securities which: (1) are issued by banks, corporations and the U.S. government; and (2) mature in 397 days or less.&lt;br/&gt;&lt;br/&gt;Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation ("Freddie Mac"), the Federal National Mortgage Association ("Fannie Mae") and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association ("Ginnie Mae"). Finally, the Fund may invest in a few government securities that have no explicit financial support, but which are regarded as having implied support because the federal government sponsors their activities.&lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Issuer Credit Risk. &lt;/b&gt;It is possible that interest or principal on securities will not be paid when due. Money market funds try to minimize this risk by purchasing higher-quality securities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk. &lt;/strong&gt;Prices of fixed-income securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of fixed-income securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Liquidity Risk.&lt;/strong&gt; Liquidity risk is the risk that the Fund will experience significant net redemptions of Fund Shares at a time when it cannot find willing buyers for its portfolio securities or can only sell its portfolio securities at a material loss.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Sector Risk. &lt;/strong&gt;A substantial part of the Fund's portfolio may be comprised of securities issued by companies in the financial services industry. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Credit Enhancement Risk. &lt;/strong&gt;The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit enhanced by the same credit enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such a credit enhancement provider. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk of Foreign Investing.&lt;/strong&gt; Because the Fund invests in securities issued by foreign companies, the Fund may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Prepayment Risk.&lt;/strong&gt; The Fund may invest in asset-backed and mortgage-backed securities, which may be subject to prepayment risk. If interest rates fall, and unscheduled prepayments on such securities accelerate, the Fund will be required to reinvest the proceeds at the lower interest rates then available.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds. &lt;/strong&gt;On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost. &lt;/strong&gt;In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns &lt;i&gt;averaged&lt;/i&gt; over the stated periods. &lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Prime Value Obligations Fund -	CAP Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.06%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's CAP class highest quarterly return was 1.31% (quarter ended September 30, 2007). Its lowest quarterly return was 0.01% (quarter ended September 30, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's CAP class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011, was 0.11%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedPrimeValueObligationsFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; 1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026161_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026161_MemberCapitalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026161_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026161_MemberCapitalShares_Member">2007-09-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026161_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberC000026161_MemberCapitalShares_Member">2011-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency. &lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. &lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member">2007-06-30</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member">2011-09-30</rr:BarChartLowestQuarterlyReturnDate>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedTaxFreeObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedTaxFreeObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedTaxFreeObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedTax-FreeObligationsFundClassInstitutionalBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedTaxFreeObligationsFund column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedTaxFreeObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedTaxFreeObligationsFund column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedTax-FreeObligationsFundBarChart column period compact * ~&lt;/div&gt;

</rr:BarChartTableTextBlock>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedTaxFreeObligationsFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedPrimeValueObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedTaxFreeObligationsFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedPrimeValueObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Treasury Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009575_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include: &lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Service Shares (SS) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury securities. These investments include repurchase agreements collateralized fully by U.S. Treasury securities.&lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;br/&gt;&lt;br/&gt;Because the Fund refers to Treasury investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to normally invest less than 80% of its assets (plus any borrowings for investment purposes) in Treasury investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk.&lt;/b&gt; Prices of U.S. Treasury securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of U.S. Treasury securities with longer maturities. &lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk.&lt;/b&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/b&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost.&lt;/b&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield. &lt;/b&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Treasury Obligations Fund - SS Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period from January 1, 2012 to June 30, 2012 was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's SS class highest quarterly return was 1.22% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's SS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011 was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's SS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedPrimeManagementObligationsFund column period compact * ~&lt;/div&gt;

</rr:ExpenseExampleWithRedemptionTableTextBlock>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Treasury Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Institutional Shares (IS) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedPrimeManagementObligationsFund column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury securities. These investments include repurchase agreements collateralized fully by U.S. Treasury securities.&lt;br/&gt;&lt;br/&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;br/&gt;&lt;br/&gt;Because the Fund refers to Treasury investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to normally invest less than 80% of its assets (plus any borrowings for investment purposes) in Treasury investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk.&lt;/strong&gt; Prices of U.S. Treasury securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of U.S. Treasury securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/strong&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt; &lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Treasury Obligations Fund - IS Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's IS class highest quarterly return was 1.29% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's IS class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011, was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's IS class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;i&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/i&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026168_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's SS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026168_MemberServiceShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011 &lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026168_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026168_MemberServiceShares_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026168_MemberServiceShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026167_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026168_MemberServiceShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026167_MemberInstitutionalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026167_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026167_MemberInstitutionalShares_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026167_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026167_MemberInstitutionalShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:ExchangeFee decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026168_MemberServiceShares_Member" unitRef="USD">0</rr:ExchangeFee>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026168_MemberServiceShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026168_MemberServiceShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026168_MemberServiceShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026168_MemberServiceShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026167_MemberInstitutionalShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026167_MemberInstitutionalShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026167_MemberInstitutionalShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026167_MemberInstitutionalShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedTreasuryObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

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  <rr:ExpenseExampleWithRedemptionTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleExpenseExampleFederatedTreasuryObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

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  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberServiceShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedTreasuryObligationsFundBarChart column period compact * ~&lt;/div&gt;

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  <rr:BarChartTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualTotalReturnsFederatedTreasuryObligationsFundClassInstitutionalBarChart column period compact * ~&lt;/div&gt;

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  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedTreasuryObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

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  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedPrimeManagementObligationsFundClassInstitutional column period compact * ~&lt;/div&gt;

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  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Trust for U.S. Treasury Obligations (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide stability of principal and current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Shares of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the operating expenses are based on the contractual limitation as shown in the table and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be:&lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury securities. These investments include repurchase agreements collateralized fully by U.S. Treasury securities. &lt;br /&gt;&lt;br /&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7"). &lt;br /&gt;&lt;br /&gt;Because the Fund refers to U.S. Treasury investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to normally invest less than 80% of its assets (plus any borrowings for investment purposes) in U.S. Treasury investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Interest Rate Risk.&lt;/b&gt; Prices of U.S. Treasury securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of U.S. Treasury securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Counterparty Credit Risk. &lt;/b&gt;A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/b&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Risk Associated with use of Amortized Cost.&lt;/b&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;ul type="square"&gt;&lt;li&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Additional Factors Affecting Yield. &lt;/b&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table shown below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's Shares total returns on a calendar year-by-year basis. The Average Annual Total Return table shows the returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Trust For U.S. Treasury Obligations&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period from January 1, 2012 to June 30, 2012, was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's highest quarterly return was 1.22% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's Average Annual Total Returns for the calendar period ended December 31, 2011. &lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's 7-Day Net Yield as of December 31, 2011, was 0.00%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009579_MemberC000026170_Member" unitRef="USD">48</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009579_MemberC000026170_Member" unitRef="USD">151</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009579_MemberC000026170_Member" unitRef="USD">263</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009579_MemberC000026170_Member" unitRef="USD">591</rr:ExpenseExampleYear10>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's Shares total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009579_MemberC000026170_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009579_MemberC000026170_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009579_MemberC000026170_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009579_MemberC000026170_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009579_MemberC000026170_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009579_MemberC000026170_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026169_MemberTrustShares_Member" unitRef="USD">80</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026169_MemberTrustShares_Member" unitRef="USD">249</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026169_MemberTrustShares_Member" unitRef="USD">433</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026169_MemberTrustShares_Member" unitRef="USD">966</rr:ExpenseExampleYear10>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Treasury Obligations Fund (the "Fund") &lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Capital Shares (CAP) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Shareholder Fees (fees paid directly from your investment)&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury securities. These investments include repurchase agreements collateralized fully by U.S. Treasury securities. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Because the Fund refers to Treasury investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to normally invest less than 80% of its assets (plus any borrowings for investment purposes) in Treasury investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk.&lt;/strong&gt; Prices of U.S. Treasury securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of U.S. Treasury securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/strong&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;  &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Treasury Obligations Fund - CAP Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class total return for the six-month period from January 1, 2012 to June 30, 2012 was 0.00%. &lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Within the periods shown in the bar chart, the Fund's CAP class highest quarterly return was 1.26% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's CAP class Average Annual Total Returns for the calendar period ended December 31, 2011.&lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011 was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:ExpenseExampleYear01 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026166_MemberCapitalShares_Member" unitRef="USD">54</rr:ExpenseExampleYear01>
  <rr:ExpenseExampleYear03 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026166_MemberCapitalShares_Member" unitRef="USD">170</rr:ExpenseExampleYear03>
  <rr:ExpenseExampleYear05 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026166_MemberCapitalShares_Member" unitRef="USD">296</rr:ExpenseExampleYear05>
  <rr:ExpenseExampleYear10 decimals="INF" contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026166_MemberCapitalShares_Member" unitRef="USD">665</rr:ExpenseExampleYear10>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's CAP class total returns on a calendar year-by-year basis.&lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class 7-Day Net Yield as of December 31, 2011 &lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026166_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's CAP class total return for the six-month period &lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026166_MemberCapitalShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026166_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return	&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedTrustforUSTreasuryObligations column period compact * ~&lt;/div&gt;

</rr:ShareholderFeesTableTextBlock>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026166_MemberCapitalShares_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026166_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return	&lt;/ont&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026166_MemberCapitalShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:RiskReturnHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Federated Treasury Obligations Fund (the "Fund")&lt;/b&gt;&lt;/font&gt;</rr:RiskReturnHeading>
  <rr:ObjectiveHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE&lt;/b&gt;&lt;/font&gt;</rr:ObjectiveHeading>
  <rr:ObjectivePrimaryTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund is a money market fund that seeks to maintain a stable net asset value (NAV) of $1.00 per Share. The Fund's investment objective is to provide current income consistent with stability of principal.&lt;/font&gt;</rr:ObjectivePrimaryTextBlock>
  <rr:ExpenseHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: FEES AND EXPENSES&lt;/b&gt;&lt;/font&gt;</rr:ExpenseHeading>
  <rr:ExpenseNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This table describes the fees and expenses that you may pay if you buy and hold Trust Shares (TR) of the Fund.&lt;/font&gt;</rr:ExpenseNarrativeTextBlock>
  <rr:ShareholderFeesCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Shareholder Fees (fees paid directly from your investment)&lt;/b&gt;&lt;/font&gt;</rr:ShareholderFeesCaption>
  <rr:OperatingExpensesCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;b&gt;Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)&lt;/b&gt;&lt;/font&gt;</rr:OperatingExpensesCaption>
  <rr:ExpenseExampleHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Example&lt;/b&gt;&lt;/font&gt;</rr:ExpenseExampleHeading>
  <rr:ExpenseExampleNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.&lt;br/&gt;&lt;br/&gt;The Example assumes that you invest $10,000 for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that operating expenses are as shown in the table above and remain the same. Although your actual costs and returns may be higher or lower, based on these assumptions your costs would be: &lt;/font&gt;</rr:ExpenseExampleNarrativeTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedTrustforUSTreasuryObligations column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:StrategyHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Fund's Main Investment Strategies?&lt;/b&gt;&lt;/font&gt;</rr:StrategyHeading>
  <rr:StrategyNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund invests primarily in a portfolio of short-term U.S. Treasury securities. These investments include repurchase agreements collateralized fully by U.S. Treasury securities.&lt;/font&gt;&lt;br/&gt;&lt;br/&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;In pursuing its investment objective and implementing its investment strategies, the Fund will comply with Rule 2a-7 under the Investment Company Act of 1940 ("Rule 2a-7").&lt;/font&gt;&lt;br/&gt;&lt;br/&gt; &lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Because the Fund refers to Treasury investments in its name, the SEC requires the Fund to notify shareholders at least 60 days in advance of any change in its investment policies that would enable the Fund to normally invest less than 80% of its assets (plus any borrowings for investment purposes) in Treasury investments.&lt;/font&gt;</rr:StrategyNarrativeTextBlock>
  <rr:RiskHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;What are the Main Risks of Investing in the Fund?&lt;/b&gt;&lt;/font&gt;</rr:RiskHeading>
  <rr:RiskNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Interest Rate Risk.&lt;/strong&gt; Prices of U.S. Treasury securities generally fall when interest rates rise. Interest rate changes have a greater effect on the price of U.S. Treasury securities with longer maturities.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Counterparty Credit Risk.&lt;/strong&gt; A party to a transaction involving the Fund may fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with Investing Share Purchase Proceeds.&lt;/strong&gt; On days during which there are net purchases of Fund Shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund's yield will likely decrease. Conversely, net purchases on days on which short-term yields rise will cause the Fund's yield to increase. In the event of significant changes in short-term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Risk Associated with use of Amortized Cost.&lt;/strong&gt; In the unlikely event that the Fund's Board of Trustees ("Board") were to determine, pursuant to Rule 2a-7, that the extent of the deviation between the Fund's amortized cost per Share and its market-based NAV per Share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce to the extent practicable such dilution or unfair results.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt; &lt;ul type="square"&gt;&lt;li style="margin-left:20px"&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;&lt;strong&gt;Additional Factors Affecting Yield. &lt;/strong&gt;There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund's yield will vary.&lt;/font&gt;&lt;/li&gt;&lt;/ul&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNarrativeTextBlock>
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  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009579_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedTrustforUSTreasuryObligations column period compact * ~&lt;/div&gt;

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  <rr:BarChartAndPerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="5"&gt;&lt;b&gt;Performance: Bar Chart and Table&lt;/b&gt;&lt;/font&gt;&lt;br/&gt;&lt;br/&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Risk/Return Bar Chart&lt;/b&gt;&lt;/font&gt;</rr:BarChartAndPerformanceTableHeading>
  <rr:PerformanceNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund's investment risks in light of its historical returns. The bar chart shows the variability of the Fund's TR class total returns on a calendar year-by-year basis. The Average Annual Total Return table shows returns &lt;em&gt;averaged&lt;/em&gt; over the stated periods. &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;Updated performance information for the Fund is available under the "Products" section at FederatedInvestors.com or by calling 1-800-341-7400.&lt;/font&gt;</rr:PerformanceNarrativeTextBlock>
  <rr:BarChartHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;Federated Treasury Obligations Fund - TR Class&lt;/font&gt;</rr:BarChartHeading>
  <rr:BarChartClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class total return for the six-month period from January 1, 2012 to June 30, 2012 was 0.00%.&lt;br/&gt;&lt;br/&gt;Within the periods shown in the bar chart, the Fund's TR class highest quarterly return was 1.16% (quarter ended December 31, 2006). Its lowest quarterly return was 0.00% (quarter ended December 31, 2011).&lt;/font&gt;</rr:BarChartClosingTextBlock>
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</rr:BarChartTableTextBlock>
  <rr:PerformanceTableHeading contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="4"&gt;&lt;b&gt;Average Annual Total Return Table&lt;/b&gt;&lt;/font&gt;&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;</rr:PerformanceTableHeading>
  <rr:PerformanceTableNarrativeTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The following table represents the Fund's TR class Average Annual Total Returns for the calendar period ended December 31, 2011. &lt;/font&gt;</rr:PerformanceTableNarrativeTextBlock>
  <rr:PerformanceTableClosingTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class 7-Day Net Yield as of December 31, 2011 was 0.01%. You may go to FederatedInvestors.com or call the Fund at 1-800-341-7400 for the current 7-Day Net Yield.&lt;/font&gt;</rr:PerformanceTableClosingTextBlock>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedTreasuryObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:AnnualFundOperatingExpensesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAnnualFundOperatingExpensesFederatedTreasuryObligationsFundClassCapital column period compact * ~&lt;/div&gt;

</rr:AnnualFundOperatingExpensesTableTextBlock>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:RiskMoneyMarketFund contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;All mutual funds take investment risks. Therefore, even though the Fund is a money market fund that seeks to maintain a stable NAV, it is possible to lose money by investing in the Fund. The primary factors that may negatively impact the Fund's ability to maintain a stable NAV, delay the payment of redemptions by the Fund, or reduce the Fund's daily dividends include:&lt;/font&gt;</rr:RiskMoneyMarketFund>
  <rr:RiskNotInsuredDepositoryInstitution contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.&lt;/font&gt;</rr:RiskNotInsuredDepositoryInstitution>
  <rr:PerformanceInformationIllustratesVariabilityOfReturns contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The bar chart shows the variability of the Fund's TR class total returns on a calendar year-by-year basis. &lt;/font&gt;</rr:PerformanceInformationIllustratesVariabilityOfReturns>
  <rr:PerformanceAvailabilityPhone contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:PerformanceAvailabilityPhone>
  <rr:PerformanceAvailabilityWebSiteAddress contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;FederatedInvestors.com&lt;/font&gt;</rr:PerformanceAvailabilityWebSiteAddress>
  <rr:PerformancePastDoesNotIndicateFuture contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt; &lt;em&gt;The Fund's performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results. &lt;/em&gt;&lt;/font&gt;</rr:PerformancePastDoesNotIndicateFuture>
  <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;October 1, 2013&lt;/font&gt;</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
  <rr:YearToDateReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026169_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class total return for the six-month period&lt;/font&gt;</rr:YearToDateReturnLabel>
  <rr:BarChartYearToDateReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026169_MemberTrustShares_Member">2012-06-30</rr:BarChartYearToDateReturnDate>
  <rr:HighestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026169_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;highest quarterly return&lt;/font&gt;</rr:HighestQuarterlyReturnLabel>
  <rr:BarChartHighestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026169_MemberTrustShares_Member">2006-12-31</rr:BarChartHighestQuarterlyReturnDate>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberCapitalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:LowestQuarterlyReturnLabel contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026169_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;lowest quarterly return&lt;/font&gt;</rr:LowestQuarterlyReturnLabel>
  <rr:BarChartLowestQuarterlyReturnDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026169_MemberTrustShares_Member">2011-12-31</rr:BarChartLowestQuarterlyReturnDate>
  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's TR class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;up to but not including the later of (the "Termination Date"): (a) October 1, 2013; or (b) the date of the Fund's next effective Prospectus.&lt;/font&gt;</mmot2:FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus>
  <rr:ShareholderFeesTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberTrustShares_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleShareholderFeesFederatedTreasuryObligationsFundClassTrust column period compact * ~&lt;/div&gt;

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  <rr:AverageAnnualReturnInceptionDate contextRef="Duration_01Oct2011_30Sep2012S000009578_MemberC000026169_MemberTrustShares_Member">2003-02-19</rr:AverageAnnualReturnInceptionDate>
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  <rr:MoneyMarketSevenDayYieldCaption contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;The Fund's IS class 7-Day Net Yield as of December 31, 2011&lt;/font&gt;</rr:MoneyMarketSevenDayYieldCaption>
  <rr:MoneyMarketSevenDayYieldPhone contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberInstitutionalShares_Member">&lt;font style="FONT-FAMILY: Times New Roman" size="3"&gt;1-800-341-7400&lt;/font&gt;</rr:MoneyMarketSevenDayYieldPhone>
  <rr:PerformanceTableTextBlock contextRef="Duration_01Oct2011_30Sep2012S000009542_Member">&lt;div style="display:none"&gt;~ http://www.federatedinvestors.com/role/ScheduleAverageAnnualTotalReturnsFederatedAutomatedGovernmentMoneyTrust column period compact * ~&lt;/div&gt;

</rr:PerformanceTableTextBlock>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.005</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0046</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0096</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_2" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">-0.0037</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0059</rr:NetExpensesOverAssets>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0134</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0061</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0074</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0261</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0443</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0443</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0128</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0113</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0153</rr:AverageAnnualReturnYear10>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassRshares_Member" unitRef="pure">0.0001</rr:MoneyMarketSevenDayYield>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.005</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.005</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.0041</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.0141</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_3" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">-0.0026</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.0115</rr:NetExpensesOverAssets>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.0429</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.0213</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.0012</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.0001</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.0001</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.0001</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.013</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.0144</rr:AverageAnnualReturnSinceInception>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0.0109</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000040003_MemberClassRshares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_Member" unitRef="pure">0</rr:MoneyMarketSevenDayYield>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberServiceShares_Member" unitRef="pure">0.0001</rr:MoneyMarketSevenDayYield>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0.0119</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0122</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009542_MemberC000026073_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0136</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0065</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0082</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0269</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0452</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0481</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0265</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0035</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2011>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.003</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.0055</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.0044</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.0129</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_4" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">-0.0027</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.0102</rr:NetExpensesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.005</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0048</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0098</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_5" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">-0.0033</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0065</rr:NetExpensesOverAssets>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.0409</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.0427</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.0156</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.0002</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.0116</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.0174</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0155</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0.0177</rr:AverageAnnualReturnYear10>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0118</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.003</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0055</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0054</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0139</rr:ExpensesOverAssets>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_6" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">-0.0037</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0102</rr:NetExpensesOverAssets>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberClassTwoShares_Member" unitRef="pure">0.0001</rr:MoneyMarketSevenDayYield>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0256</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0278</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0176</rr:AnnualReturn2008>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0026</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0004</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0004</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0096</rr:AverageAnnualReturnYear05>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0129</rr:AverageAnnualReturnSinceInception>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.004</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.006</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.01</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_7" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">-0.005</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.005</rr:NetExpensesOverAssets>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.005</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0025</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0048</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0123</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_8" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">-0.0042</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0.0072</rr:BarChartHighestQuarterlyReturn>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0081</rr:NetExpensesOverAssets>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_MemberC000026052_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.016</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.0083</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.0099</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.0286</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.047</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.05</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.0284</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.0046</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0</rr:AnnualReturn2011>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0119</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0048</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0065</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0252</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0435</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0464</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0248</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0027</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.0164</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.0191</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0001</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0146</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026070_MemberClassTwoShares_Member" unitRef="pure">0.0165</rr:AverageAnnualReturnYear10>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0033</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0053</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_9" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">-0.0033</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.002</rr:NetExpensesOverAssets>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_Member" unitRef="pure">0</rr:MoneyMarketSevenDayYield>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0171</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0102</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0121</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.031</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0493</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0508</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0233</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0027</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0004</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2011>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0.011</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009529_MemberC000026050_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009531_Member" unitRef="pure">0</rr:MoneyMarketSevenDayYield>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009540_MemberC000026071_MemberServiceShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_Member" unitRef="pure">0</rr:MoneyMarketSevenDayYield>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0.0126</rr:BarChartHighestQuarterlyReturn>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009530_MemberC000026051_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberInstitutionalShares_Member" unitRef="pure">0.0001</rr:MoneyMarketSevenDayYield>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0001</rr:BarChartYearToDateReturn>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.003</rr:ManagementFeesOverAssets>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.013</rr:BarChartHighestQuarterlyReturn>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.0055</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.0048</rr:OtherExpensesOverAssets>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.0133</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_10" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">-0.0031</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.0102</rr:NetExpensesOverAssets>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0001</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0153</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026060_MemberInstitutionalShares_Member" unitRef="pure">0.0196</rr:AverageAnnualReturnYear10>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.0415</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.0445</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.0229</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.0022</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.0138</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.0192</rr:AverageAnnualReturnSinceInception>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_Member" unitRef="pure">0</rr:MoneyMarketSevenDayYield>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0.0112</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009546_MemberC000026082_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0033</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0053</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_11" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">-0.0023</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.003</rr:NetExpensesOverAssets>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0483</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0498</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0223</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0018</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0001</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0146</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0216</rr:AverageAnnualReturnSinceInception>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0033</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0053</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_12" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">-0.0008</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0045</rr:NetExpensesOverAssets>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0145</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0077</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0096</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0284</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0467</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0482</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0208</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.001</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2010>
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  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberCapitalShares_Member" unitRef="pure">0.0001</rr:MoneyMarketSevenDayYield>
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  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
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  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0.055</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0.01</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0.01</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
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  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0.0034</rr:OtherExpensesOverAssets>
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  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0.0141</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0.0073</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0.0093</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0.0279</rr:AnnualReturn2005>
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  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0.0479</rr:AnnualReturn2007>
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  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0.001</rr:AnnualReturn2009>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
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  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2011>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0.0034</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0.0054</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_14" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">-0.0034</rr:FeeWaiverOrReimbursementOverAssets>
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  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0.0304</rr:AnnualReturn2005>
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  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0.005</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0.005</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0.005</rr:ManagementFeesOverAssets>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0.0486</rr:AnnualReturn2006>
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  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0.0075</rr:DistributionAndService12b1FeesOverAssets>
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  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0.0075</rr:DistributionAndService12b1FeesOverAssets>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0.0028</rr:AnnualReturn2009>
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  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0.008</rr:OtherExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0.008</rr:OtherExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0.008</rr:OtherExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0.008</rr:OtherExpensesOverAssets>
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  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0.0205</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0.0205</rr:ExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0.013</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_15" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">-0.0037</rr:FeeWaiverOrReimbursementOverAssets>
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  <rr:FeeWaiverOrReimbursementOverAssets id="Item_18" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">-0.0037</rr:FeeWaiverOrReimbursementOverAssets>
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  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0.0183</rr:NetExpensesOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0.0183</rr:NetExpensesOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0.0093</rr:NetExpensesOverAssets>
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  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberTrustShares_Member" unitRef="pure">0.0001</rr:MoneyMarketSevenDayYield>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0.0118</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0.0094</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0.003</rr:AnnualReturn2003>
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  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0.0417</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0.0434</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0.0168</rr:AnnualReturn2008>
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  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0</rr:AnnualReturn2011>
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  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">-0.01</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0.012</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0.0044</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0.0085</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0.012</rr:AverageAnnualReturnYear05>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0.0122</rr:BarChartHighestQuarterlyReturn>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0.0142</rr:AverageAnnualReturnYear10>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0.009</rr:AverageAnnualReturnYear10>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026064_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0.013</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0.0179</rr:AverageAnnualReturnSinceInception>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0.0001</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0.0127</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0.0163</rr:AverageAnnualReturnSinceInception>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberEagleShares_Member" unitRef="pure">0</rr:MoneyMarketSevenDayYield>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0</rr:MoneyMarketSevenDayYield>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026066_Member" unitRef="pure">0</rr:MoneyMarketSevenDayYield>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026067_Member" unitRef="pure">0</rr:MoneyMarketSevenDayYield>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026068_Member" unitRef="pure">0</rr:MoneyMarketSevenDayYield>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0.0112</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009538_MemberC000026065_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberInstitutionalShares_Member" unitRef="pure">0.0013</rr:MoneyMarketSevenDayYield>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0113</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0007</rr:BarChartYearToDateReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0091</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0004</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0.0128</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026059_MemberCapitalShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0.0025</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0.0033</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0.0078</rr:ExpensesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0215</rr:OtherExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_19" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">-0.0008</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026062_MemberTrustShares_Member" unitRef="pure">0.007</rr:NetExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0235</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_20" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">-0.013</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0105</rr:NetExpensesOverAssets>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0082</rr:AnnualReturn2002>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0017</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.003</rr:AnnualReturn2004>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0211</rr:AnnualReturn2005>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0392</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0435</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0288</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0064</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0004</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0</rr:AnnualReturn2011>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0</rr:AverageAnnualReturnYear01>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0034</rr:OtherExpensesOverAssets>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0157</rr:AverageAnnualReturnYear05>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0054</rr:ExpensesOverAssets>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000026107_MemberEagleShares_Member" unitRef="pure">0.0151</rr:AverageAnnualReturnYear10>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_21" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">-0.0008</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0046</rr:NetExpensesOverAssets>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0125</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0077</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0089</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0208</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0311</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0333</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0222</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.004</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0003</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0003</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0119</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.014</rr:AverageAnnualReturnYear10>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.015</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0102</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0114</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0234</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0337</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0358</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0247</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0064</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0021</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0018</rr:AnnualReturn2011>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0034</rr:OtherExpensesOverAssets>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0054</rr:ExpensesOverAssets>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_22" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">-0.0033</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0021</rr:NetExpensesOverAssets>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0.0215</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0.0235</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_23" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">-0.0155</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0.008</rr:NetExpensesOverAssets>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0.0089</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0.0023</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0</rr:AnnualReturn2011>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0.0068</rr:AverageAnnualReturnSinceInception>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberServiceShares_Member" unitRef="pure">0.0001</rr:MoneyMarketSevenDayYield>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0018</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0141</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026108_MemberInstitutionalShares_Member" unitRef="pure">0.0164</rr:AverageAnnualReturnYear10>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0.0124</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009536_MemberC000026061_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberPremierShares_Member" unitRef="pure">0</rr:MoneyMarketSevenDayYield>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0.0038</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009557_MemberC000054277_MemberPremierShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0.0128</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009537_MemberC000026063_MemberInstitutionalShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0.0085</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026109_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberServiceShares_Member" unitRef="pure">0.0001</rr:MoneyMarketSevenDayYield>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0034</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0054</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_24" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">-0.0023</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0031</rr:NetExpensesOverAssets>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0008</rr:AnnualReturn2011>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0011</rr:AnnualReturn2010>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0054</rr:AnnualReturn2009>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0237</rr:AnnualReturn2008>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0348</rr:AnnualReturn2007>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0327</rr:AnnualReturn2006>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0223</rr:AnnualReturn2005>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0102</rr:AnnualReturn2004>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.009</rr:AnnualReturn2003>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0138</rr:AnnualReturn2002>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0008</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0131</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0153</rr:AverageAnnualReturnYear10>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberCapitalShares_Member" unitRef="pure">0.0003</rr:MoneyMarketSevenDayYield>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0002</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0089</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009558_MemberC000026110_MemberCapitalShares_Member" unitRef="pure">0.0001</rr:BarChartLowestQuarterlyReturn>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0033</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0053</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_25" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">-0.0033</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.002</rr:NetExpensesOverAssets>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0177</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.011</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0127</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0316</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.05</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0528</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0297</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0063</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0019</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0015</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0015</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0182</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0214</rr:AverageAnnualReturnYear10>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.001</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0133</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026147_MemberInstitutionalShares_Member" unitRef="pure">0.0003</rr:BarChartLowestQuarterlyReturn>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberInstitutionalShares_Member" unitRef="pure">0.0021</rr:MoneyMarketSevenDayYield>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberCapitalShares_Member" unitRef="pure">0.0011</rr:MoneyMarketSevenDayYield>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0005</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.013</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0033</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0053</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_26" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">-0.0008</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0045</rr:NetExpensesOverAssets>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0152</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0084</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0101</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0291</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0474</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0502</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0271</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.004</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2011>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0161</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.019</rr:AverageAnnualReturnYear10>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.0035</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.0055</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_27" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">-0.0025</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.003</rr:NetExpensesOverAssets>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberServiceShares_Member" unitRef="pure">0.0001</rr:MoneyMarketSevenDayYield>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0.0127</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026148_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0033</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0053</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_28" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">-0.0023</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.003</rr:NetExpensesOverAssets>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0165</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0098</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0115</rr:AnnualReturn2004>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0308</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0491</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0517</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0287</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0053</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0009</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0005</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0005</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0172</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnYear10 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009571_MemberC000026149_MemberCapitalShares_Member" unitRef="pure">0.0203</rr:AverageAnnualReturnYear10>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.0493</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.0517</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.0289</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.0067</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.0012</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.0006</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.0006</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.0176</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026153_MemberCapitalShares_Member" unitRef="pure">0.0241</rr:AverageAnnualReturnSinceInception>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberInstitutionalShares_Member" unitRef="pure">0.0022</rr:MoneyMarketSevenDayYield>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0126</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartLowestQuarterlyReturn>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0</rr:BarChartYearToDateReturn>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberServiceShares_Member" unitRef="pure">0.0001</rr:MoneyMarketSevenDayYield>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0011</rr:BarChartYearToDateReturn>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0133</rr:BarChartHighestQuarterlyReturn>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0035</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0055</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_29" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">-0.001</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0045</rr:NetExpensesOverAssets>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0003</rr:BarChartLowestQuarterlyReturn>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0477</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0502</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0274</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0053</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AnnualReturn2011>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0001</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0164</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026154_MemberServiceShares_Member" unitRef="pure">0.0228</rr:AverageAnnualReturnSinceInception>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0324</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0503</rr:AnnualReturn2006>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0528</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.03</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0077</rr:AnnualReturn2009>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0021</rr:AnnualReturn2010>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0016</rr:AnnualReturn2011>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:AverageAnnualReturnYear01 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0016</rr:AverageAnnualReturnYear01>
  <rr:AverageAnnualReturnYear05 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0186</rr:AverageAnnualReturnYear05>
  <rr:AverageAnnualReturnSinceInception decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009573_MemberC000026155_MemberInstitutionalShares_Member" unitRef="pure">0.0247</rr:AverageAnnualReturnSinceInception>
  <rr:MoneyMarketSevenDayYield decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberInstitutionalShares_Member" unitRef="pure">0.002</rr:MoneyMarketSevenDayYield>
  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0009</rr:BarChartYearToDateReturn>
  <rr:BarChartHighestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0132</rr:BarChartHighestQuarterlyReturn>
  <rr:BarChartLowestQuarterlyReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0002</rr:BarChartLowestQuarterlyReturn>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0033</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0053</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_30" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">-0.0033</rr:FeeWaiverOrReimbursementOverAssets>
  <rr:NetExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.002</rr:NetExpensesOverAssets>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:AnnualReturn2002 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0177</rr:AnnualReturn2002>
  <rr:AnnualReturn2003 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0108</rr:AnnualReturn2003>
  <rr:AnnualReturn2004 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0125</rr:AnnualReturn2004>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:AnnualReturn2005 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0314</rr:AnnualReturn2005>
  <rr:AnnualReturn2006 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0498</rr:AnnualReturn2006>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:AnnualReturn2007 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0523</rr:AnnualReturn2007>
  <rr:AnnualReturn2008 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0292</rr:AnnualReturn2008>
  <rr:AnnualReturn2009 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0059</rr:AnnualReturn2009>
  <rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeImposedOnPurchasesOverOfferingPrice>
  <rr:AnnualReturn2010 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0017</rr:AnnualReturn2010>
  <rr:ManagementFeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="pure">0.002</rr:ManagementFeesOverAssets>
  <rr:MaximumDeferredSalesChargeOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumDeferredSalesChargeOverOther>
  <rr:AnnualReturn2011 decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026156_MemberInstitutionalShares_Member" unitRef="pure">0.0014</rr:AnnualReturn2011>
  <rr:DistributionAndService12b1FeesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="pure">0</rr:DistributionAndService12b1FeesOverAssets>
  <rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member" unitRef="pure">0</rr:MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther>
  <rr:RedemptionFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member" unitRef="pure">0</rr:RedemptionFeeOverRedemption>
  <rr:ExchangeFeeOverRedemption decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009577_MemberC000026164_MemberInstitutionalShares_Member" unitRef="pure">0</rr:ExchangeFeeOverRedemption>
  <rr:OtherExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="pure">0.0033</rr:OtherExpensesOverAssets>
  <rr:ExpensesOverAssets decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="pure">0.0053</rr:ExpensesOverAssets>
  <rr:FeeWaiverOrReimbursementOverAssets id="Item_31" decimals="4" contextRef="Duration_01Oct2011_30Sep2012S000009574_MemberC000026157_MemberServiceShares_Member" unitRef="pure">-0.0008</rr:FeeWaiverOrReimbursementOverAssets>
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  <rr:BarChartYearToDateReturn decimals="4" contextRef="Duration_01Oct2011_30Sep2012S0000095