485BPOS

File No. 333-82876

811-21035

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933[X]

Pre-Effective Amendment No.[__]

Post-Effective Amendment No. 15[X]

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940[X]

Amendment No. 15[X]

(Check appropriate box or boxes.)

CitizensSelect Funds

(Exact Name of Registrant as Specified in Charter)

c/o The Dreyfus Corporation

200 Park Avenue, New York, New York 10166

(Address of Principal Executive Offices) (Zip Code)

Registrant's Telephone Number, including Area Code: (212) 922-6000

John Pak, Esq.

200 Park Avenue

New York, New York 10166

(Name and Address of Agent for Service)

It is proposed that this filing will become effective (check appropriate box)

X__ immediately upon filing pursuant to paragraph (b)

_____on (date) pursuant to paragraph (b)

_____ (days) days after filing pursuant to paragraph (a)(1)

_____on (date) pursuant to paragraph (a)(1)

_____ (days) days after filing pursuant to paragraph (a)(2)

_____on (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

_____this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940 the Registrant certifies that it meets all of the requirements for effectiveness of this Amendment to the Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933 and has duly caused this Amendment to the Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of New York, and State of New York on the 18th day of September 2013.

CitizensSelect Funds

BY:	/s/ Bradley J. Skapyak*
	Bradley J. Skapyak, PRESIDENT

Pursuant to the requirements of the Securities Act of 1933, this Amendment to the Registration Statement has been signed below by the following persons in the capacities and on the date indicated.

Signatures	Title	Date
/s/ Bradley J. Skapyak*	President (Principal Executive Officer)	9/18/13
Bradley J. Skapyak
/s/ James Windels*	Treasurer (Principal Financial Officer and Accounting Officer)	9/18/13
James Windels
/s/ Joseph S. DiMartino*	Chairman of the Board	9/18/13
Joseph S. DiMartino
/s/ Clifford L. Alexander*	Board Member	9/18/13
Clifford L. Alexander
/s/ Gordon J. Davis*	Board Member	9/18/13
Gordon J. Davis
/s/ Whitney Gerard*	Board Member	9/18/13
Whitney Gerard
/s/ Nathan Leventhal*	Board Member	9/18/13
Nathan Leventhal
/s/ Benaree Pratt Wiley*	Board Member	9/18/13
Benaree Pratt Wiley

*BY:	/s/ Kiesha Astwood
	Kiesha Astwood Attorney-in-Fact

INDEX OF EXHIBITS

Exhibits

EX-101.INS – Instance Document.

EX-101.SCH – Taxonomy.

EX-101.CAL – Calculation Linkbase.

EX-101.DEF – Definition Linkbase.

EX-101.LAB – Labels Linkbase.

EX-101.PRE – Presentation Linkbase.

XML

Class D Prospectus | CitizensSelect Prime Money Market Fund

Fund Summary - CitizensSelect Prime Money Market Fund

Investment Objective

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class D Prospectus CitizensSelect Prime Money Market Fund Class D
Management fees	0.10%
Distribution (12b-1) fees	0.65%
Other Expenses - Administrative services fee	0.25%
Other Expenses - Omnibus account services fee	0.10%
Other Expenses - Other fund expenses	0.02%
Total annual fund operating expenses	1.12%
Fee waiver and/or expense reimbursement	(0.02%)
Total annual fund operating expenses (less fee waiver and/or expense reimbursement)	1.10%

Example

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 Year	3 Years	5 Years	10 Years
Class D Prospectus CitizensSelect Prime Money Market Fund Class D	112	350	606	1,340

Principal Investment Strategy

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund normally invests in a diversified portfolio of high quality, short-term, dollar-denominated debt securities, including: securities issued or guaranteed as to principal and interest by the U.S. government or its agencies or instrumentalities; certificates of deposit, time deposits, bankers' acceptances and other short-term securities issued by domestic or foreign banks or thrifts or their subsidiaries or branches; repurchase agreements, including tri-party repurchase agreements; asset-backed securities; domestic and dollar-denominated foreign commercial paper, and other short-term corporate obligations, including those with floating or variable rates of interest; and dollar-denominated foreign government obligations. Normally, the fund invests at least 25% of its assets in domestic or dollar-denominated foreign bank obligations.

Principal Risks

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·Credit risk. Failure of an issuer to make timely interest or principal payments, or a decline or perception of a decline in the credit quality of a security, can cause the security's price to fall, potentially lowering the fund's share price. Although the fund invests only in high quality debt securities, any of the fund's holdings could have its credit rating downgraded or could default. The credit quality of the securities held by the fund can change rapidly in certain market environments, and the default of a single holding could have the potential to cause significant deterioration of the fund's net asset value.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

·Banking industry risk. The risks generally associated with concentrating investments in the banking industry, such as interest rate risk, credit risk, and regulatory developments relating to the banking industry.

·Foreign investment risk. The risks generally associated with dollar-denominated foreign investments, such as economic and political developments, seizure or nationalization of deposits, imposition of taxes or other restrictions on payment of principal and interest.

·Government securities risk. Not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the fund does not apply to the market value of such security or to shares of the fund itself. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. In addition, because many types of U.S. government securities trade actively outside the United States, their prices may rise and fall as changes in global economic conditions affect the demand for these securities.

·Repurchase agreement counterparty risk. The risk that a counterparty in a repurchase agreement could fail to honor the terms of its agreement.

Performance

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class D shares from year to year. The table shows the average annual total returns of the fund's Class D shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Year-by-Year Total Returns as of 12/31 each year (%)

	Best Quarter Q3, 2006: 1.09% Worst Quarter Q4, 2012: 0.00%
The year-to-date total return for the fund's Class D shares as of June 30, 2013 was 0.00%.

Average Annual Total Returns as of 12/31/12

Average Annual Returns	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
Class D Prospectus CitizensSelect Prime Money Market Fund Class D	none	0.38%	1.32%

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class D shares.

XML

Class C Prospectus | CitizensSelect Prime Money Market Fund

Fund Summary - CitizensSelect Prime Money Market Fund

Investment Objective

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class C Prospectus CitizensSelect Prime Money Market Fund Class C
Management fees	0.10%
Distribution (12b-1) fees	0.25%
Other Expenses - Administrative services fee	0.25%
Other Expenses - Omnibus account services fee	0.10%
Other Expenses - Other fund expenses	0.02%
Total annual fund operating expenses	0.72%
Fee waiver and/or expense reimbursement	(0.02%)
Total annual fund operating expenses (less fee waiver and/or expense reimbursement)	0.70%

Example

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 Year	3 Years	5 Years	10 Years
Class C Prospectus CitizensSelect Prime Money Market Fund Class C	72	224	390	871

Principal Investment Strategy

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund normally invests in a diversified portfolio of high quality, short-term, dollar-denominated debt securities, including: securities issued or guaranteed as to principal and interest by the U.S. government or its agencies or instrumentalities; certificates of deposit, time deposits, bankers' acceptances and other short-term securities issued by domestic or foreign banks or thrifts or their subsidiaries or branches; repurchase agreements, including tri-party repurchase agreements; asset-backed securities; domestic and dollar-denominated foreign commercial paper, and other short-term corporate obligations, including those with floating or variable rates of interest; and dollar-denominated foreign government obligations. Normally, the fund invests at least 25% of its assets in domestic or dollar-denominated foreign bank obligations.

Principal Risks

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·Credit risk. Failure of an issuer to make timely interest or principal payments, or a decline or perception of a decline in the credit quality of a security, can cause the security's price to fall, potentially lowering the fund's share price. Although the fund invests only in high quality debt securities, any of the fund's holdings could have its credit rating downgraded or could default. The credit quality of the securities held by the fund can change rapidly in certain market environments, and the default of a single holding could have the potential to cause significant deterioration of the fund's net asset value.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

·Banking industry risk. The risks generally associated with concentrating investments in the banking industry, such as interest rate risk, credit risk, and regulatory developments relating to the banking industry.

·Foreign investment risk. The risks generally associated with dollar-denominated foreign investments, such as economic and political developments, seizure or nationalization of deposits, imposition of taxes or other restrictions on payment of principal and interest.

·Government securities risk. Not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the fund does not apply to the market value of such security or to shares of the fund itself. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. In addition, because many types of U.S. government securities trade actively outside the United States, their prices may rise and fall as changes in global economic conditions affect the demand for these securities.

·Repurchase agreement counterparty risk. The risk that a counterparty in a repurchase agreement could fail to honor the terms of its agreement.

Performance

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class C shares from year to year. The table shows the average annual total returns of the fund's Class C shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Year-by-Year Total Returns as of 12/31 each year (%)

	Best Quarter Q3, 2006: 1.19% Worst Quarter Q4, 2012: 0.00%
The year-to-date total return for the fund's Class C shares as of June 30, 2013 was 0.00%.

Average Annual Total Returns as of 12/31/12

Average Annual Returns	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
Class C Prospectus CitizensSelect Prime Money Market Fund Class C	none	0.48%	1.52%

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class C shares.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Summary - CitizensSelect Treasury Money Market Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

As a money market fund, the fund is subject to maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund only invests in securities issued or guaranteed as to principal and interest by the U.S. government.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·U.S. Treasury securities risk. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class D shares from year to year. The table shows the average annual total returns of the fund's Class D shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.dreyfus.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Year-by-Year Total Returns as of 12/31 each year (%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter
Q4, 2006: 0.99%

Worst Quarter
Q4, 2012: 0.00%

The year-to-date total return of the fund's Class D shares as of June 30, 2013 was 0.00%.

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date total return of the fund's Class D shares

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2013

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.00%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2006

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

0.99%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2012

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

0.00%

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class D shares.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of 12/31/12

Money Market Seven Day Yield Phone

rr_MoneyMarketSevenDayYieldPhone

1-800-242-2224

Class D

Risk/Return:

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.10%

Distribution (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.65%

Other Expenses - Administrative services fees

rr_Component1OtherExpensesOverAssets

0.25%

Other Expenses - Omnibus account services fee

rr_Component2OtherExpensesOverAssets

0.10%

Other Expenses - Other fund expenses

rr_Component3OtherExpensesOverAssets

0.02%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.12%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total annual fund operating expenses (less fee waiver and/or expense reimbursement)

rr_NetExpensesOverAssets

1.10%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 112

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

350

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

606

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,340

Annual Return 2003

rr_AnnualReturn2003

0.25%

Annual Return 2004

rr_AnnualReturn2004

0.37%

Annual Return 2005

rr_AnnualReturn2005

1.90%

Annual Return 2006

rr_AnnualReturn2006

3.64%

Annual Return 2007

rr_AnnualReturn2007

3.60%

Annual Return 2008

rr_AnnualReturn2008

0.69%

Annual Return 2009

rr_AnnualReturn2009

0.00%

Annual Return 2010

rr_AnnualReturn2010

0.00%

Annual Return 2011

rr_AnnualReturn2011

0.00%

Annual Return 2012

rr_AnnualReturn2012

0.00%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

none

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.14%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.04%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Summary - CitizensSelect Prime Money Market Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund normally invests in a diversified portfolio of high quality, short-term, dollar-denominated debt securities, including: securities issued or guaranteed as to principal and interest by the U.S. government or its agencies or instrumentalities; certificates of deposit, time deposits, bankers' acceptances and other short-term securities issued by domestic or foreign banks or thrifts or their subsidiaries or branches; repurchase agreements, including tri-party repurchase agreements; asset-backed securities; domestic and dollar-denominated foreign commercial paper, and other short-term corporate obligations, including those with floating or variable rates of interest; and dollar-denominated foreign government obligations. Normally, the fund invests at least 25% of its assets in domestic or dollar-denominated foreign bank obligations.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·Credit risk. Failure of an issuer to make timely interest or principal payments, or a decline or perception of a decline in the credit quality of a security, can cause the security's price to fall, potentially lowering the fund's share price. Although the fund invests only in high quality debt securities, any of the fund's holdings could have its credit rating downgraded or could default. The credit quality of the securities held by the fund can change rapidly in certain market environments, and the default of a single holding could have the potential to cause significant deterioration of the fund's net asset value.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

·Banking industry risk. The risks generally associated with concentrating investments in the banking industry, such as interest rate risk, credit risk, and regulatory developments relating to the banking industry.

·Foreign investment risk. The risks generally associated with dollar-denominated foreign investments, such as economic and political developments, seizure or nationalization of deposits, imposition of taxes or other restrictions on payment of principal and interest.

·Government securities risk. Not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the fund does not apply to the market value of such security or to shares of the fund itself. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. In addition, because many types of U.S. government securities trade actively outside the United States, their prices may rise and fall as changes in global economic conditions affect the demand for these securities.

·Repurchase agreement counterparty risk. The risk that a counterparty in a repurchase agreement could fail to honor the terms of its agreement.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class C shares from year to year. The table shows the average annual total returns of the fund's Class C shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.dreyfus.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Year-by-Year Total Returns as of 12/31 each year (%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Best Quarter Q3, 2006: 1.19% Worst Quarter Q4, 2012: 0.00%
The year-to-date total return for the fund's Class C shares as of June 30, 2013 was 0.00%.

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date total return for the fund's Class C shares

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2013

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.00%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2006

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.19%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2012

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

0.00%

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class C shares.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of 12/31/12

Money Market Seven Day Yield Phone

rr_MoneyMarketSevenDayYieldPhone

1-800-242-2224

Class C

Risk/Return:

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.10%

Distribution (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses - Administrative services fees

rr_Component1OtherExpensesOverAssets

0.25%

Other Expenses - Omnibus account services fee

rr_Component2OtherExpensesOverAssets

0.10%

Other Expenses - Other fund expenses

rr_Component3OtherExpensesOverAssets

0.02%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.72%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total annual fund operating expenses (less fee waiver and/or expense reimbursement)

rr_NetExpensesOverAssets

0.70%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 72

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

224

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

390

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 871

Annual Return 2003

rr_AnnualReturn2003

0.49%

Annual Return 2004

rr_AnnualReturn2004

0.71%

Annual Return 2005

rr_AnnualReturn2005

2.60%

Annual Return 2006

rr_AnnualReturn2006

4.46%

Annual Return 2007

rr_AnnualReturn2007

4.68%

Annual Return 2008

rr_AnnualReturn2008

2.30%

Annual Return 2009

rr_AnnualReturn2009

0.10%

Annual Return 2010

rr_AnnualReturn2010

0.00%

Annual Return 2011

rr_AnnualReturn2011

0.01%

Annual Return 2012

rr_AnnualReturn2012

0.00%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

none

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.48%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.52%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Summary - CitizensSelect Prime Money Market Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund normally invests in a diversified portfolio of high quality, short-term, dollar-denominated debt securities, including: securities issued or guaranteed as to principal and interest by the U.S. government or its agencies or instrumentalities; certificates of deposit, time deposits, bankers' acceptances and other short-term securities issued by domestic or foreign banks or thrifts or their subsidiaries or branches; repurchase agreements, including tri-party repurchase agreements; asset-backed securities; domestic and dollar-denominated foreign commercial paper, and other short-term corporate obligations, including those with floating or variable rates of interest; and dollar-denominated foreign government obligations. Normally, the fund invests at least 25% of its assets in domestic or dollar-denominated foreign bank obligations.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·Credit risk. Failure of an issuer to make timely interest or principal payments, or a decline or perception of a decline in the credit quality of a security, can cause the security's price to fall, potentially lowering the fund's share price. Although the fund invests only in high quality debt securities, any of the fund's holdings could have its credit rating downgraded or could default. The credit quality of the securities held by the fund can change rapidly in certain market environments, and the default of a single holding could have the potential to cause significant deterioration of the fund's net asset value.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

·Banking industry risk. The risks generally associated with concentrating investments in the banking industry, such as interest rate risk, credit risk, and regulatory developments relating to the banking industry.

·Foreign investment risk. The risks generally associated with dollar-denominated foreign investments, such as economic and political developments, seizure or nationalization of deposits, imposition of taxes or other restrictions on payment of principal and interest.

·Government securities risk. Not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the fund does not apply to the market value of such security or to shares of the fund itself. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. In addition, because many types of U.S. government securities trade actively outside the United States, their prices may rise and fall as changes in global economic conditions affect the demand for these securities.

·Repurchase agreement counterparty risk. The risk that a counterparty in a repurchase agreement could fail to honor the terms of its agreement.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class D shares from year to year. The table shows the average annual total returns of the fund's Class D shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.dreyfus.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Year-by-Year Total Returns as of 12/31 each year (%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Best Quarter Q3, 2006: 1.09% Worst Quarter Q4, 2012: 0.00%
The year-to-date total return for the fund's Class D shares as of June 30, 2013 was 0.00%.

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date total return for the fund's Class D shares

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2013

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.00%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2006

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.09%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2012

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

0.00%

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class D shares.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of 12/31/12

Money Market Seven Day Yield Phone

rr_MoneyMarketSevenDayYieldPhone

1-800-242-2224

Class D

Risk/Return:

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.10%

Distribution (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.65%

Other Expenses - Administrative services fees

rr_Component1OtherExpensesOverAssets

0.25%

Other Expenses - Omnibus account services fee

rr_Component2OtherExpensesOverAssets

0.10%

Other Expenses - Other fund expenses

rr_Component3OtherExpensesOverAssets

0.02%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.12%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total annual fund operating expenses (less fee waiver and/or expense reimbursement)

rr_NetExpensesOverAssets

1.10%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 112

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

350

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

606

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,340

Annual Return 2003

rr_AnnualReturn2003

0.37%

Annual Return 2004

rr_AnnualReturn2004

0.53%

Annual Return 2005

rr_AnnualReturn2005

2.23%

Annual Return 2006

rr_AnnualReturn2006

4.04%

Annual Return 2007

rr_AnnualReturn2007

4.27%

Annual Return 2008

rr_AnnualReturn2008

1.89%

Annual Return 2009

rr_AnnualReturn2009

0.02%

Annual Return 2010

rr_AnnualReturn2010

0.00%

Annual Return 2011

rr_AnnualReturn2011

0.01%

Annual Return 2012

rr_AnnualReturn2012

0.00%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

none

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.38%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.32%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Summary - CitizensSelect Treasury Money Market Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·U.S. Treasury securities risk. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class B shares from year to year. The table shows the average annual total returns of the fund's Class B shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.dreyfus.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Year-by-Year Total Returns as of 12/31 each year (%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter
Q4, 2006: 1.15%

Worst Quarter
Q4, 2012: 0.00%

The year-to-date total return of the fund's Class B shares as of June 30, 2013 was 0.00%.

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date total return of the fund's Class B shares

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2013

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.00%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2006

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.15%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2012

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

0.00%

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class B shares.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of 12/31/12

Money Market Seven Day Yield Phone

rr_MoneyMarketSevenDayYieldPhone

1-800-242-2224

Class B

Risk/Return:

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.10%

Other Expenses - Administrative services fees

rr_Component1OtherExpensesOverAssets

0.25%

Other Expenses - Omnibus account services fee

rr_Component2OtherExpensesOverAssets

0.10%

Other Expenses - Other fund expenses

rr_Component3OtherExpensesOverAssets

0.02%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.47%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total annual fund operating expenses (less fee waiver and/or expense reimbursement)

rr_NetExpensesOverAssets

0.45%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 46

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

144

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

252

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 567

Annual Return 2003

rr_AnnualReturn2003

0.60%

Annual Return 2004

rr_AnnualReturn2004

0.78%

Annual Return 2005

rr_AnnualReturn2005

2.51%

Annual Return 2006

rr_AnnualReturn2006

4.32%

Annual Return 2007

rr_AnnualReturn2007

4.28%

Annual Return 2008

rr_AnnualReturn2008

1.29%

Annual Return 2009

rr_AnnualReturn2009

0.00%

Annual Return 2010

rr_AnnualReturn2010

0.00%

Annual Return 2011

rr_AnnualReturn2011

0.00%

Annual Return 2012

rr_AnnualReturn2012

0.00%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

none

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.26%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.36%

XML

Class A Prospectus | CitizensSelect Treasury Money Market Fund

Fund Summary - CitizensSelect Treasury Money Market Fund

Investment Objective

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class A Prospectus CitizensSelect Treasury Money Market Fund Class A
Management fees	0.10%
Other Expenses - Omnibus account services fee	0.10%
Other Expenses - Other fund expenses	0.02%
Total annual fund operating expenses	0.22%
Fee waiver and/or expense reimbursement	(0.02%)
Total annual fund operating expenses (less fee waiver and/or expense reimbursement)	0.20%

Example

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 Year	3 Years	5 Years	10 Years
Class A Prospectus CitizensSelect Treasury Money Market Fund Class A	20	64	113	255

Principal Investment Strategy

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund only invests in securities issued or guaranteed as to principal and interest by the U.S. government.

Principal Risks

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·U.S. Treasury securities risk. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

Performance

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class A shares from year to year. The table shows the average annual total returns of the fund's Class A shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Year-by-Year Total Returns as of 12/31 each year (%)

Best Quarter
Q4, 2006: 1.22%

Worst Quarter
Q4, 2012: 0.00%

The year-to-date total return of the fund's Class A shares as of June 30, 2013 was 0.00%.

Average Annual Total Returns as of 12/31/12

Average Annual Returns	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
Class A Prospectus CitizensSelect Treasury Money Market Fund Class A	none	0.31%	1.52%

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class A shares.

XML

Class C Prospectus | CitizensSelect Treasury Money Market Fund

Fund Summary - CitizensSelect Treasury Money Market Fund

Investment Objective

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class C Prospectus CitizensSelect Treasury Money Market Fund Class C
Management fees	0.10%
Distribution (12b-1) fees	0.25%
Other Expenses - Administrative services fee	0.25%
Other Expenses - Omnibus account services fee	0.10%
Other Expenses - Other fund expenses	0.02%
Total annual fund operating expenses	0.72%
Fee waiver and/or expense reimbursement	(0.02%)
Total annual fund operating expenses (less fee waiver and/or expense reimbursement)	0.70%

Example

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 Year	3 Years	5 Years	10 Years
Class C Prospectus CitizensSelect Treasury Money Market Fund Class C	72	224	390	871

Principal Investment Strategy

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund only invests in securities issued or guaranteed as to principal and interest by the U.S. government.

Principal Risks

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·U.S. Treasury securities risk. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

Performance

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class C shares from year to year. The table shows the average annual total returns of the fund's Class C shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Year-by-Year Total Returns as of 12/31 each year (%)

Best Quarter
Q4, 2006: 1.09%

Worst Quarter
Q4, 2012: 0.00%

The year-to-date total return of the fund's Class C shares as of June 30, 2013 was 0.00%.

Average Annual Total Returns as of 12/31/12

Average Annual Returns	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
Class C Prospectus CitizensSelect Treasury Money Market Fund Class C	none	0.21%	1.21%

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class C shares.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Summary - CitizensSelect Treasury Money Market Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund only invests in securities issued or guaranteed as to principal and interest by the U.S. government.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·U.S. Treasury securities risk. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class C shares from year to year. The table shows the average annual total returns of the fund's Class C shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.dreyfus.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Year-by-Year Total Returns as of 12/31 each year (%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter
Q4, 2006: 1.09%

Worst Quarter
Q4, 2012: 0.00%

The year-to-date total return of the fund's Class C shares as of June 30, 2013 was 0.00%.

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date total return of the fund's Class C shares

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2013

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.00%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2006

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.09%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2012

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

0.00%

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class C shares.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of 12/31/12

Money Market Seven Day Yield Phone

rr_MoneyMarketSevenDayYieldPhone

1-800-242-2224

Class C

Risk/Return:

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.10%

Distribution (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses - Administrative services fees

rr_Component1OtherExpensesOverAssets

0.25%

Other Expenses - Omnibus account services fee

rr_Component2OtherExpensesOverAssets

0.10%

Other Expenses - Other fund expenses

rr_Component3OtherExpensesOverAssets

0.02%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.72%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total annual fund operating expenses (less fee waiver and/or expense reimbursement)

rr_NetExpensesOverAssets

0.70%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 72

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

224

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

390

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 871

Annual Return 2003

rr_AnnualReturn2003

0.35%

Annual Return 2004

rr_AnnualReturn2004

0.53%

Annual Return 2005

rr_AnnualReturn2005

2.26%

Annual Return 2006

rr_AnnualReturn2006

4.06%

Annual Return 2007

rr_AnnualReturn2007

4.02%

Annual Return 2008

rr_AnnualReturn2008

1.04%

Annual Return 2009

rr_AnnualReturn2009

0.00%

Annual Return 2010

rr_AnnualReturn2010

0.00%

Annual Return 2011

rr_AnnualReturn2011

0.00%

Annual Return 2012

rr_AnnualReturn2012

0.00%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

none

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.21%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.21%

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	Sep. 01, 2013

XML

Class B Prospectus | CitizensSelect Prime Money Market Fund

Fund Summary - CitizensSelect Prime Money Market Fund

Investment Objective

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class B Prospectus CitizensSelect Prime Money Market Fund Class B
Management fees	0.10%
Other Expenses - Administrative services fees	0.25%
Other Expenses - Omnibus account services fee	0.10%
Other Expenses - Other fund expenses	0.02%
Total annual fund operating expenses	0.47%
Fee waiver and/or expense reimbursement	(0.02%)
Total annual fund operating expenses (less fee waiver and/or expense reimbursement)	0.45%

Example

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 Year	3 Years	5 Years	10 Years
Class B Prospectus CitizensSelect Prime Money Market Fund Class B	46	144	252	567

Principal Investment Strategy

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund normally invests in a diversified portfolio of high quality, short-term, dollar-denominated debt securities, including: securities issued or guaranteed as to principal and interest by the U.S. government or its agencies or instrumentalities; certificates of deposit, time deposits, bankers' acceptances and other short-term securities issued by domestic or foreign banks or thrifts or their subsidiaries or branches; repurchase agreements, including tri-party repurchase agreements; asset-backed securities; domestic and dollar-denominated foreign commercial paper, and other short-term corporate obligations, including those with floating or variable rates of interest; and dollar-denominated foreign government obligations. Normally, the fund invests at least 25% of its assets in domestic or dollar-denominated foreign bank obligations.

Principal Risks

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·Credit risk. Failure of an issuer to make timely interest or principal payments, or a decline or perception of a decline in the credit quality of a security, can cause the security's price to fall, potentially lowering the fund's share price. Although the fund invests only in high quality debt securities, any of the fund's holdings could have its credit rating downgraded or could default. The credit quality of the securities held by the fund can change rapidly in certain market environments, and the default of a single holding could have the potential to cause significant deterioration of the fund's net asset value.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

·Banking industry risk. The risks generally associated with concentrating investments in the banking industry, such as interest rate risk, credit risk, and regulatory developments relating to the banking industry.

·Foreign investment risk. The risks generally associated with dollar-denominated foreign investments, such as economic and political developments, seizure or nationalization of deposits, imposition of taxes or other restrictions on payment of principal and interest.

·Government securities risk. Not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the fund does not apply to the market value of such security or to shares of the fund itself. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. In addition, because many types of U.S. government securities trade actively outside the United States, their prices may rise and fall as changes in global economic conditions affect the demand for these securities.

·Repurchase agreement counterparty risk. The risk that a counterparty in a repurchase agreement could fail to honor the terms of its agreement.

Performance

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class B shares from year to year. The table shows the average annual total returns of the fund's Class B shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Year-by-Year Total Returns as of 12/31 each year (%)

	Best Quarter Q3, 2006: 1.25% Worst Quarter Q4, 2012: 0.00%
The year-to-date total return for the fund's Class B shares as of June 30, 2013 was 0.00%.

Average Annual Total Returns as of 12/31/12

Average Annual Returns	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
Class B Prospectus CitizensSelect Prime Money Market Fund Class B	none	0.55%	1.68%

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class B shares.

XML

Class A Prospectus | CitizensSelect Prime Money Market Fund

Fund Summary - CitizensSelect Prime Money Market Fund

Investment Objective

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class A Prospectus CitizensSelect Prime Money Market Fund Class A
Management fees	0.10%
Other Expenses - Omnibus account services fee	0.10%
Other Expenses - Other fund expenses	0.02%
Total annual fund operating expenses	0.22%
Fee waiver and/or expense reimbursement	(0.02%)
Total annual fund operating expenses (less fee waiver and/or expense reimbursement)	0.20%

Example

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 Year	3 Years	5 Years	10 Years
Class A Prospectus CitizensSelect Prime Money Market Fund Class A	20	64	113	255

Principal Investment Strategy

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund normally invests in a diversified portfolio of high quality, short-term, dollar-denominated debt securities, including: securities issued or guaranteed as to principal and interest by the U.S. government or its agencies or instrumentalities; certificates of deposit, time deposits, bankers' acceptances and other short-term securities issued by domestic or foreign banks or thrifts or their subsidiaries or branches; repurchase agreements, including tri-party repurchase agreements; asset-backed securities; domestic and dollar-denominated foreign commercial paper, and other short-term corporate obligations, including those with floating or variable rates of interest; and dollar-denominated foreign government obligations. Normally, the fund invests at least 25% of its assets in domestic or dollar-denominated foreign bank obligations.

Principal Risks

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·Credit risk. Failure of an issuer to make timely interest or principal payments, or a decline or perception of a decline in the credit quality of a security, can cause the security's price to fall, potentially lowering the fund's share price. Although the fund invests only in high quality debt securities, any of the fund's holdings could have its credit rating downgraded or could default. The credit quality of the securities held by the fund can change rapidly in certain market environments, and the default of a single holding could have the potential to cause significant deterioration of the fund's net asset value.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

·Banking industry risk. The risks generally associated with concentrating investments in the banking industry, such as interest rate risk, credit risk, and regulatory developments relating to the banking industry.

·Foreign investment risk. The risks generally associated with dollar-denominated foreign investments, such as economic and political developments, seizure or nationalization of deposits, imposition of taxes or other restrictions on payment of principal and interest.

·Government securities risk. Not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the fund does not apply to the market value of such security or to shares of the fund itself. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. In addition, because many types of U.S. government securities trade actively outside the United States, their prices may rise and fall as changes in global economic conditions affect the demand for these securities.

·Repurchase agreement counterparty risk. The risk that a counterparty in a repurchase agreement could fail to honor the terms of its agreement.

Performance

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class A shares from year to year. The table shows the average annual total returns of the fund's Class A shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Year-by-Year Total Returns as of 12/31 each year (%)

	Best Quarter Q3, 2006: 1.31% Worst Quarter Q1, 2012: 0.00%
The year-to-date total return for the fund's Class A shares as of June 30, 2013 was 0.00%.

Average Annual Total Returns as of 12/31/12

Average Annual Returns	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
Class A Prospectus CitizensSelect Prime Money Market Fund Class A	0.02%	0.67%	1.87%

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class A shares.

XML

Class D Prospectus | CitizensSelect Treasury Money Market Fund

Fund Summary - CitizensSelect Treasury Money Market Fund

Investment Objective

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class D Prospectus CitizensSelect Treasury Money Market Fund Class D
Management fees	0.10%
Distribution (12b-1) fees	0.65%
Other Expenses - Administrative services fee	0.25%
Other Expenses - Omnibus account services fee	0.10%
Other Expenses - Other fund expenses	0.02%
Total annual fund operating expenses	1.12%
Fee waiver and/or expense reimbursement	(0.02%)
Total annual fund operating expenses (less fee waiver and/or expense reimbursement)	1.10%

Example

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 Year	3 Years	5 Years	10 Years
Class D Prospectus CitizensSelect Treasury Money Market Fund Class D	112	350	606	1,340

Principal Investment Strategy

As a money market fund, the fund is subject to maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund only invests in securities issued or guaranteed as to principal and interest by the U.S. government.

Principal Risks

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·U.S. Treasury securities risk. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

Performance

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class D shares from year to year. The table shows the average annual total returns of the fund's Class D shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Year-by-Year Total Returns as of 12/31 each year (%)

Best Quarter
Q4, 2006: 0.99%

Worst Quarter
Q4, 2012: 0.00%

The year-to-date total return of the fund's Class D shares as of June 30, 2013 was 0.00%.

Average Annual Total Returns as of 12/31/12

Average Annual Returns	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
Class D Prospectus CitizensSelect Treasury Money Market Fund Class D	none	0.14%	1.04%

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class D shares.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Summary - CitizensSelect Treasury Money Market Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund only invests in securities issued or guaranteed as to principal and interest by the U.S. government.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·U.S. Treasury securities risk. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class A shares from year to year. The table shows the average annual total returns of the fund's Class A shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.dreyfus.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Year-by-Year Total Returns as of 12/31 each year (%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter
Q4, 2006: 1.22%

Worst Quarter
Q4, 2012: 0.00%

The year-to-date total return of the fund's Class A shares as of June 30, 2013 was 0.00%.

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date total return of the fund's Class A shares

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2013

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.00%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2006

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.22%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2012

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

0.00%

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class A shares.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of 12/31/12

Money Market Seven Day Yield Phone

rr_MoneyMarketSevenDayYieldPhone

1-800-242-2224

Class A

Risk/Return:

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.10%

Other Expenses - Omnibus account services fee

rr_Component2OtherExpensesOverAssets

0.10%

Other Expenses - Other fund expenses

rr_Component3OtherExpensesOverAssets

0.02%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.22%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total annual fund operating expenses (less fee waiver and/or expense reimbursement)

rr_NetExpensesOverAssets

0.20%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 20

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

64

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

113

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 255

Annual Return 2003

rr_AnnualReturn2003

0.85%

Annual Return 2004

rr_AnnualReturn2004

1.03%

Annual Return 2005

rr_AnnualReturn2005

2.77%

Annual Return 2006

rr_AnnualReturn2006

4.58%

Annual Return 2007

rr_AnnualReturn2007

4.54%

Annual Return 2008

rr_AnnualReturn2008

1.54%

Annual Return 2009

rr_AnnualReturn2009

0.02%

Annual Return 2010

rr_AnnualReturn2010

0.00%

Annual Return 2011

rr_AnnualReturn2011

0.00%

Annual Return 2012

rr_AnnualReturn2012

0.00%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

none

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.31%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.52%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Summary - CitizensSelect Prime Money Market Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund normally invests in a diversified portfolio of high quality, short-term, dollar-denominated debt securities, including: securities issued or guaranteed as to principal and interest by the U.S. government or its agencies or instrumentalities; certificates of deposit, time deposits, bankers' acceptances and other short-term securities issued by domestic or foreign banks or thrifts or their subsidiaries or branches; repurchase agreements, including tri-party repurchase agreements; asset-backed securities; domestic and dollar-denominated foreign commercial paper, and other short-term corporate obligations, including those with floating or variable rates of interest; and dollar-denominated foreign government obligations. Normally, the fund invests at least 25% of its assets in domestic or dollar-denominated foreign bank obligations.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·Credit risk. Failure of an issuer to make timely interest or principal payments, or a decline or perception of a decline in the credit quality of a security, can cause the security's price to fall, potentially lowering the fund's share price. Although the fund invests only in high quality debt securities, any of the fund's holdings could have its credit rating downgraded or could default. The credit quality of the securities held by the fund can change rapidly in certain market environments, and the default of a single holding could have the potential to cause significant deterioration of the fund's net asset value.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

·Banking industry risk. The risks generally associated with concentrating investments in the banking industry, such as interest rate risk, credit risk, and regulatory developments relating to the banking industry.

·Foreign investment risk. The risks generally associated with dollar-denominated foreign investments, such as economic and political developments, seizure or nationalization of deposits, imposition of taxes or other restrictions on payment of principal and interest.

·Government securities risk. Not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the fund does not apply to the market value of such security or to shares of the fund itself. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. In addition, because many types of U.S. government securities trade actively outside the United States, their prices may rise and fall as changes in global economic conditions affect the demand for these securities.

·Repurchase agreement counterparty risk. The risk that a counterparty in a repurchase agreement could fail to honor the terms of its agreement.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class A shares from year to year. The table shows the average annual total returns of the fund's Class A shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.dreyfus.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Year-by-Year Total Returns as of 12/31 each year (%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Best Quarter Q3, 2006: 1.31% Worst Quarter Q1, 2012: 0.00%
The year-to-date total return for the fund's Class A shares as of June 30, 2013 was 0.00%.

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date total return for the fund's Class A shares

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2013

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.00%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2006

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.31%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2012

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

0.00%

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class A shares.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of 12/31/12

Money Market Seven Day Yield Phone

rr_MoneyMarketSevenDayYieldPhone

1-800-242-2224

Class A

Risk/Return:

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.10%

Other Expenses - Omnibus account services fee

rr_Component2OtherExpensesOverAssets

0.10%

Other Expenses - Other fund expenses

rr_Component3OtherExpensesOverAssets

0.02%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.22%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total annual fund operating expenses (less fee waiver and/or expense reimbursement)

rr_NetExpensesOverAssets

0.20%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 20

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

64

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

113

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 255

Annual Return 2003

rr_AnnualReturn2003

0.99%

Annual Return 2004

rr_AnnualReturn2004

1.22%

Annual Return 2005

rr_AnnualReturn2005

3.11%

Annual Return 2006

rr_AnnualReturn2006

4.98%

Annual Return 2007

rr_AnnualReturn2007

5.21%

Annual Return 2008

rr_AnnualReturn2008

2.82%

Annual Return 2009

rr_AnnualReturn2009

0.40%

Annual Return 2010

rr_AnnualReturn2010

0.09%

Annual Return 2011

rr_AnnualReturn2011

0.04%

Annual Return 2012

rr_AnnualReturn2012

0.02%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

0.02%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.67%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.87%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Summary - CitizensSelect Prime Money Market Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00. To pursue its goal, the fund normally invests in a diversified portfolio of high quality, short-term, dollar-denominated debt securities, including: securities issued or guaranteed as to principal and interest by the U.S. government or its agencies or instrumentalities; certificates of deposit, time deposits, bankers' acceptances and other short-term securities issued by domestic or foreign banks or thrifts or their subsidiaries or branches; repurchase agreements, including tri-party repurchase agreements; asset-backed securities; domestic and dollar-denominated foreign commercial paper, and other short-term corporate obligations, including those with floating or variable rates of interest; and dollar-denominated foreign government obligations. Normally, the fund invests at least 25% of its assets in domestic or dollar-denominated foreign bank obligations.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·Credit risk. Failure of an issuer to make timely interest or principal payments, or a decline or perception of a decline in the credit quality of a security, can cause the security's price to fall, potentially lowering the fund's share price. Although the fund invests only in high quality debt securities, any of the fund's holdings could have its credit rating downgraded or could default. The credit quality of the securities held by the fund can change rapidly in certain market environments, and the default of a single holding could have the potential to cause significant deterioration of the fund's net asset value.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

·Banking industry risk. The risks generally associated with concentrating investments in the banking industry, such as interest rate risk, credit risk, and regulatory developments relating to the banking industry.

·Foreign investment risk. The risks generally associated with dollar-denominated foreign investments, such as economic and political developments, seizure or nationalization of deposits, imposition of taxes or other restrictions on payment of principal and interest.

·Government securities risk. Not all obligations of the U.S. government, its agencies and instrumentalities are backed by the full faith and credit of the U.S. Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the U.S. government or its agencies or instrumentalities of a security held by the fund does not apply to the market value of such security or to shares of the fund itself. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity. In addition, because many types of U.S. government securities trade actively outside the United States, their prices may rise and fall as changes in global economic conditions affect the demand for these securities.

·Repurchase agreement counterparty risk. The risk that a counterparty in a repurchase agreement could fail to honor the terms of its agreement.

Risk Money Market Fund [Text]

rr_RiskMoneyMarketFund

Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class B shares from year to year. The table shows the average annual total returns of the fund's Class B shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following bar chart and table provide some indication of the risks of investing in the fund.

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.dreyfus.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Year-by-Year Total Returns as of 12/31 each year (%)

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

	Best Quarter Q3, 2006: 1.25% Worst Quarter Q4, 2012: 0.00%
The year-to-date total return for the fund's Class B shares as of June 30, 2013 was 0.00%.

Year to Date Return, Label

rr_YearToDateReturnLabel

The year-to-date total return for the fund's Class B shares

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Jun. 30, 2013

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

0.00%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2006

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

1.25%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2012

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

0.00%

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class B shares.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns as of 12/31/12

Money Market Seven Day Yield Phone

rr_MoneyMarketSevenDayYieldPhone

1-800-242-2224

Class B

Risk/Return:

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.10%

Other Expenses - Administrative services fees

rr_Component1OtherExpensesOverAssets

0.25%

Other Expenses - Omnibus account services fee

rr_Component2OtherExpensesOverAssets

0.10%

Other Expenses - Other fund expenses

rr_Component3OtherExpensesOverAssets

0.02%

Total annual fund operating expenses

rr_ExpensesOverAssets

0.47%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total annual fund operating expenses (less fee waiver and/or expense reimbursement)

rr_NetExpensesOverAssets

0.45%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 46

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

144

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

252

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 567

Annual Return 2003

rr_AnnualReturn2003

0.74%

Annual Return 2004

rr_AnnualReturn2004

0.96%

Annual Return 2005

rr_AnnualReturn2005

2.85%

Annual Return 2006

rr_AnnualReturn2006

4.72%

Annual Return 2007

rr_AnnualReturn2007

4.94%

Annual Return 2008

rr_AnnualReturn2008

2.55%

Annual Return 2009

rr_AnnualReturn2009

0.21%

Annual Return 2010

rr_AnnualReturn2010

0.00%

Annual Return 2011

rr_AnnualReturn2011

0.01%

Annual Return 2012

rr_AnnualReturn2012

0.00%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

none

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.55%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

1.68%

XML

Class B Prospectus | CitizensSelect Treasury Money Market Fund

Fund Summary - CitizensSelect Treasury Money Market Fund

Investment Objective

The fund seeks as high a level of current income as is consistent with the preservation of capital and the maintenance of liquidity.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund.

The Dreyfus Corporation has agreed to pay all of the fund's expenses, except management fees, Rule 12b-1 fees, administrative and omnibus account services fees, and certain other expenses, including the fees and expenses of the non-interested board members and their counsel. The Dreyfus Corporation has agreed to reduce its fees in an amount equal to the fund's allocable portion of the fees and expenses of the non-interested board members and their counsel (in the amount of .02% for the past fiscal year).

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses	Class B Prospectus CitizensSelect Treasury Money Market Fund Class B
Management fees	0.10%
Other Expenses - Administrative services fee	0.25%
Other Expenses - Omnibus account services fee	0.10%
Other Expenses - Other fund expenses	0.02%
Total annual fund operating expenses	0.47%
Fee waiver and/or expense reimbursement	(0.02%)
Total annual fund operating expenses (less fee waiver and/or expense reimbursement)	0.45%

Example

The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The examples are based on net operating expenses, which reflect the waiver/reimbursement by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (USD $)	1 Year	3 Years	5 Years	10 Years
Class B Prospectus CitizensSelect Treasury Money Market Fund Class B	46	144	252	567

Principal Investment Strategy

As a money market fund, the fund is subject to the maturity, quality, liquidity and diversification requirements of Rule 2a-7 under the Investment Company Act of 1940, as amended, which are designed to help money market funds maintain a stable share price of $1.00.

Principal Risks

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the fund.

The fund's yield will fluctuate as the short-term securities in its portfolio mature and the proceeds are reinvested in securities with different interest rates. Additionally, while the fund has maintained a constant share price since inception, and will continue to try to do so, neither The Dreyfus Corporation nor its affiliates are required to make a capital infusion, enter into a capital support agreement or take other actions to prevent the fund's share price from falling below $1.00. The following are the principal risks that could reduce the fund's income level and/or share price:

·Interest rate risk. This risk refers to the decline in the prices of fixed-income securities that may accompany a rise in the overall level of interest rates. A sharp and unexpected rise in interest rates could cause a money market fund's share price to drop below a dollar.

·U.S. Treasury securities risk. A security backed by the U.S. Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity, but the market prices for such securities are not guaranteed and will fluctuate.

·Liquidity risk. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities may fall dramatically, potentially lowering the fund's share price, even during periods of declining interest rates. Also, during such periods, redemptions by a few large investors in the fund may have a significant adverse effect on the fund's net asset value and remaining fund shareholders.

Performance

The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Class B shares from year to year. The table shows the average annual total returns of the fund's Class B shares over time. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. More recent performance information may be available at www.dreyfus.com.

Year-by-Year Total Returns as of 12/31 each year (%)

Best Quarter
Q4, 2006: 1.15%

Worst Quarter
Q4, 2012: 0.00%

The year-to-date total return of the fund's Class B shares as of June 30, 2013 was 0.00%.

Average Annual Total Returns as of 12/31/12

Average Annual Returns	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
Class B Prospectus CitizensSelect Treasury Money Market Fund Class B	none	0.26%	1.36%

Institutions may call toll-free 1-800-242-2224 for the current yield of the fund's Class B shares.

XML

Document and Entity Information	0 Months Ended
	Apr. 30, 2013
Risk/Return:
Document Type	485BPOS
Document Period End Date	Apr. 30, 2013
Registrant Name	CITIZENSSELECT FUNDS
Central Index Key	0001167368
Amendment Flag	false
Document Creation Date	Aug. 27, 2013
Document Effective Date	Sep. 01, 2013
Prospectus Date	Sep. 01, 2013
Class A Prospectus | CitizensSelect Prime Money Market Fund | Class A
Risk/Return:
Trading Symbol	CZAXX
Class A Prospectus | CitizensSelect Treasury Money Market Fund | Class A
Risk/Return:
Trading Symbol	CEAXX
Class B Prospectus | CitizensSelect Prime Money Market Fund | Class B
Risk/Return:
Trading Symbol	CZBXX
Class B Prospectus | CitizensSelect Treasury Money Market Fund | Class B
Risk/Return:
Trading Symbol	CEBXX
Class C Prospectus | CitizensSelect Prime Money Market Fund | Class C
Risk/Return:
Trading Symbol	CZCXX
Class C Prospectus | CitizensSelect Treasury Money Market Fund | Class C
Risk/Return:
Trading Symbol	CECXX
Class D Prospectus | CitizensSelect Prime Money Market Fund | Class D
Risk/Return:
Trading Symbol	CZDXX
Class D Prospectus | CitizensSelect Treasury Money Market Fund | Class D
Risk/Return:
Trading Symbol	CEDXX