485BPOS

File No. 333-104120

811-21327

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. 22[X]

and/or

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

Amendment No. 22[X]

(Check appropriate box or boxes.)

Dreyfus Manager Funds II

(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

Janette Farragher, 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 2nd day of April 2013.

Dreyfus Manager Funds II

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)	04/02/2013
Bradley J. Skapyak
/s/ James Windels*	Treasurer (Principal Financial and Accounting Officer)	04/02/2013
James Windels
/s/ Joseph S. DiMartino*	Chairman of the Board	04/02/2013
Joseph S. DiMartino
/s/ Peggy C. Davis*	Board Member	04/02/2013
Peggy C. Davis
/s/ David P. Feldman*	Board Member	04/02/2013
David P. Feldman
/s/ Ehud Houminer*	Board Member	04/02/2013
Ehud Houminer
/s/ Lynn Martin*	Board Member	04/02/2013
Lynn Martin
/s/ Robin A. Melvin*	Board Member	04/02/2013
Robin A. Melvin
/s/ Martin Peretz*	Board Member	04/02/2013
Martin Peretz

/s/ Philip L. Toia*	Board Member	04/02/2013
Philip L. Toia

*BY:	/s/ Janette Farragher
	Janette Farragher 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

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Summary

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks high total return through a combination of capital appreciation and current income.

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. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in certain funds in the Dreyfus Family of Funds. More information about these and other discounts is available from your financial professional and in the Shareholder Guide section on page 10 of the Prospectus and in the How to Buy Shares section and the Additional Information About How to Buy Shares section on page II-1 and page III-1, respectively, of the fund's Statement of Additional Information.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

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

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2014-04-01

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 117.20% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

117.20%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in certain funds in the Dreyfus Family of Funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 50,000

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 one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the expense 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, No Redemption, By Year, Caption [Text]

rr_ExpenseExampleNoRedemptionByYearCaption

You would pay the following expenses if you did not redeem your shares:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategy

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

To pursue its goal, the fund invests in a diversified mix of stocks and fixed-income securities. The fund selects securities that, in the portfolio managers' judgment, will result in the highest total return consistent with preservation of principal. The fund varies the mix of stocks and bonds from time to time, but normally the fund allocates between 25% and 50% of its assets to fixed-income securities. The fund has appointed an asset allocation manager who will allocate fund assets among the fund's equity portfolio managers and the fund's fixed-income portfolio managers, based on an assessment of the relative return and risk of each asset class, analyzing several factors, including general economic conditions, anticipated future changes in interest rates and the outlook for stocks generally.

In seeking to achieve a high relative risk-adjusted return on the fund's equity investments, the equity managers create a broadly diversified equity portfolio for the fund that includes a blend of growth stocks and value stocks. Stock selection is made through extensive quantitative and fundamental research.

The fixed-income portion of the fund's portfolio may include corporate bonds, debentures, notes, mortgage-related securities, including collateralized mortgage obligations (CMOs), asset-backed securities, convertible securities, municipal obligations, zero coupon bonds, and money market instruments. The fund invests primarily in securities that, when purchased, are rated investment grade (Baa/BBB or higher) or are the unrated equivalent as determined by The Dreyfus Corporation, and in securities that are issued or guaranteed by the U.S. government, including Treasury inflation-protected securities (TIPS). The fund has no limit with respect to its portfolio maturity or duration.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. It is not a complete investment program. The fund's share price fluctuates, sometimes dramatically, which means you could lose money.

·Allocation risk. The ability of the fund to achieve its investment goal depends, in part, on the ability of the fund's portfolio manager to allocate effectively the fund's assets among equity and fixed-income securities. There can be no assurance that the actual allocations will be effective in achieving the fund's investment goal.

·Correlation risk. Although the prices of equity securities and fixed-income securities, as well as other asset classes, often rise and fall at different times so that a fall in the price of one may be offset by a rise in the price of the other, in down markets the prices of these securities and asset classes can also fall in tandem. Because the fund allocates its investments among different asset classes, the fund is subject to correlation risk.

·Risks of stock investing. Stocks generally fluctuate more in value than bonds and may decline significantly over short time periods. There is the chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The market value of a stock may decline due to general weakness in the stock market or because of factors that affect the company or its particular industry.

·Growth and value stock risk. By investing in a mix of growth and value companies, the fund assumes the risks of both. Investors often expect growth companies to increase their earnings at a certain rate. If these expectations are not met, investors can punish the stocks inordinately, even if earnings do increase. In addition, growth stocks typically lack the dividend yield that can cushion stock prices in market downturns. Value stocks involve the risk that they may never reach their expected full market value, either because the market fails to recognize the stock's intrinsic worth, or the expected value was misgauged. They also may decline in price even though in theory they are already undervalued.

·Interest rate risk. Prices of bonds tend to move inversely with changes in interest rates. Typically, a rise in rates will adversely affect bond prices and, accordingly, the fund's share price. The longer the effective maturity and duration of the fund's fixed-income portfolio, the more the fund's share price is likely to react to interest rates.

·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 bond, can cause a bond's price to fall, potentially lowering the fund's share price. The lower a bond's credit rating, the greater the chance – in the rating agency's opinion – that the bond issuer will default or fail to meet its payment obligations.

·Liquidity risk. When there is little or no active trading market for a security, the fund may not be able to sell the security in a timely manner at its perceived value, which could cause the fund's share price to fall.

·Portfolio turnover risk. The fund may engage in short-term trading, which could produce higher transaction costs and taxable distributions, and lower the fund's after-tax performance.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund's share price fluctuates, sometimes dramatically, which means you could lose money.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not a bank deposit. It 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 compares the average annual total returns of the fund's shares to those of a broad measure of market performance. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Sales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown. 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 (%) -- Class A

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

Sales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter
Q2, 2003: 15.55%

Worst Quarter
Q4, 2008: -15.87%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2003

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

15.55%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(15.87%)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax performance is shown only for Class A shares. After-tax performance of the fund's other share classes will vary.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

After-tax performance is shown only for Class A shares. After-tax performance of the fund's other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

The fund's performance represents the performance of a predecessor fund's shares for periods prior to January 31, 2004, as adjusted to reflect the fund's applicable sales loads, and the performance of the respective class of fund shares thereafter (except for Class Z, the performance for which reflects that of the fund's Class J shares (which are not offered in this prospectus) for the period January 31, 2004 through December 17, 2004 and the performance of the fund's Class Z shares thereafter). Performance figures for periods prior to January 31, 2004 (December 17, 2004 for Class Z) have not been adjusted to reflect the fund's operating expenses; if these expenses had been reflected, such performance may have been lower.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns (as of 12/31/12)

Standard & Poor's 500 Composite Stock Price Index, reflects no deduction for fees, expenses or taxes

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

15.99%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.66%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.10%

Barclays Capital U.S. Aggregate Bond Index, reflects no deduction for fees, expenses or taxes

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

4.22%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

5.95%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.18%

Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Management fees

rr_ManagementFeesOverAssets

0.80%

Distribution (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (including shareholder services fees)

rr_OtherExpensesOverAssets

0.57%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.37%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.17%)

^[2]

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

rr_NetExpensesOverAssets

1.20%

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

Class A shares bought without an initial sales charge as part of an investment of $1 million or more may be charged a deferred sales charge of 1.00% if redeemed within one year. Class Z shares are generally not available for new accounts.

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

690

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

968

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,267

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,113

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

690

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

968

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,267

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,113

Annual Return 2003

rr_AnnualReturn2003

21.96%

Annual Return 2004

rr_AnnualReturn2004

6.74%

Annual Return 2005

rr_AnnualReturn2005

(1.51%)

Annual Return 2006

rr_AnnualReturn2006

9.33%

Annual Return 2007

rr_AnnualReturn2007

4.90%

Annual Return 2008

rr_AnnualReturn2008

(27.94%)

Annual Return 2009

rr_AnnualReturn2009

22.17%

Annual Return 2010

rr_AnnualReturn2010

13.23%

Annual Return 2011

rr_AnnualReturn2011

(1.78%)

Annual Return 2012

rr_AnnualReturn2012

13.53%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

7.00%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.94%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.42%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 31, 2004

Class A | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

6.80%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.63%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

3.85%

Class A | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

4.83%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

0.72%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

3.73%

Class C

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Management fees

rr_ManagementFeesOverAssets

0.80%

Distribution (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.75%

Other expenses (including shareholder services fees)

rr_OtherExpensesOverAssets

0.53%

Total annual fund operating expenses

rr_ExpensesOverAssets

2.08%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.13%)

^[2]

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

rr_NetExpensesOverAssets

1.95%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

298

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

639

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,107

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,400

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

198

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

639

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,107

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,400

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

11.61%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.36%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.34%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 31, 2004

Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price)

rr_MaximumDeferredSalesChargeOverOther

none

Management fees

rr_ManagementFeesOverAssets

0.80%

Distribution (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (including shareholder services fees)

rr_OtherExpensesOverAssets

0.29%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.09%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.14%)

^[2]

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

rr_NetExpensesOverAssets

0.95%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

97

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

323

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

587

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,316

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

97

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

323

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

587

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

1,316

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

13.84%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

2.42%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.24%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 31, 2004

Class Z

Risk/Return:

rr_RiskReturnAbstract

Maximum sales charge (load) imposed on purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price)

rr_MaximumDeferredSalesChargeOverOther

none

Management fees

rr_ManagementFeesOverAssets

0.80%

Distribution (Rule 12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses (including shareholder services fees)

rr_OtherExpensesOverAssets

0.48%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.28%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.18%)

^[2]

Total annual fund operating expenses (after 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

388

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

685

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,529

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

112

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

388

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

685

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,529

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

13.43%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

2.16%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.10%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 17, 2004

[1] Class A shares bought without an initial sales charge as part of an investment of $1 million or more may be charged a deferred sales charge of 1.00% if redeemed within one year. Class Z shares are generally not available for new accounts.

[2] The Dreyfus Corporation has contractually agreed to waive receipt of its fees and/or assume the expenses of the fund until April 1, 2014, so that the direct expenses of none of the classes (excluding Rule 12b-1 fees, shareholder services fees, taxes, interest, brokerage commissions, commitment fees on borrowings and extraordinary expenses) exceed .95%. On or after April 1, 2014, The Dreyfus Corporation may terminate this expense waiver at any time.

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Dreyfus Balanced Opportunity Fund | Dreyfus Balanced Opportunity Fund

Fund Summary

Investment Objective

The fund seeks high total return through a combination of capital appreciation and current income.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in certain funds in the Dreyfus Family of Funds. More information about these and other discounts is available from your financial professional and in the Shareholder Guide section on page 10 of the Prospectus and in the How to Buy Shares section and the Additional Information About How to Buy Shares section on page II-1 and page III-1, respectively, of the fund's Statement of Additional Information.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Dreyfus Balanced Opportunity Fund	Class A		Class C	Class I	Class Z
Maximum sales charge (load) imposed on purchases (as a percentage of offering price)	5.75%		none	none	none
Maximum deferred sales charge (load) (as a percentage of lower of purchase or sale price)	none	[1]	1.00%	none	none

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

Annual Fund Operating Expenses Dreyfus Balanced Opportunity Fund		Class A	Class C	Class I	Class Z
Management fees		0.80%	0.80%	0.80%	0.80%
Distribution (Rule 12b-1) fees		none	0.75%	none	none
Other expenses (including shareholder services fees)		0.57%	0.53%	0.29%	0.48%
Total annual fund operating expenses		1.37%	2.08%	1.09%	1.28%
Fee waiver and/or expense reimbursement	[1]	(0.17%)	(0.13%)	(0.14%)	(0.18%)
Total annual fund operating expenses (after fee waiver and/or expense reimbursement)		1.20%	1.95%	0.95%	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 one-year example and the first year of the three-, five- and ten-years examples are based on net operating expenses, which reflect the expense 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 Dreyfus Balanced Opportunity Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	690	968	1,267	2,113
Class C	298	639	1,107	2,400
Class I	97	323	587	1,316
Class Z	112	388	685	1,529

You would pay the following expenses if you did not redeem your shares:

Expense Example No Redemption Dreyfus Balanced Opportunity Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	690	968	1,267	2,113
Class C	198	639	1,107	2,400
Class I	97	323	587	1,316
Class Z	112	388	685	1,529

Portfolio Turnover

The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 117.20% of the average value of its portfolio.

Principal Investment Strategy

To pursue its goal, the fund invests in a diversified mix of stocks and fixed-income securities. The fund selects securities that, in the portfolio managers' judgment, will result in the highest total return consistent with preservation of principal. The fund varies the mix of stocks and bonds from time to time, but normally the fund allocates between 25% and 50% of its assets to fixed-income securities. The fund has appointed an asset allocation manager who will allocate fund assets among the fund's equity portfolio managers and the fund's fixed-income portfolio managers, based on an assessment of the relative return and risk of each asset class, analyzing several factors, including general economic conditions, anticipated future changes in interest rates and the outlook for stocks generally.

In seeking to achieve a high relative risk-adjusted return on the fund's equity investments, the equity managers create a broadly diversified equity portfolio for the fund that includes a blend of growth stocks and value stocks. Stock selection is made through extensive quantitative and fundamental research.

The fixed-income portion of the fund's portfolio may include corporate bonds, debentures, notes, mortgage-related securities, including collateralized mortgage obligations (CMOs), asset-backed securities, convertible securities, municipal obligations, zero coupon bonds, and money market instruments. The fund invests primarily in securities that, when purchased, are rated investment grade (Baa/BBB or higher) or are the unrated equivalent as determined by The Dreyfus Corporation, and in securities that are issued or guaranteed by the U.S. government, including Treasury inflation-protected securities (TIPS). The fund has no limit with respect to its portfolio maturity or duration.

Principal Risks

An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. It is not a complete investment program. The fund's share price fluctuates, sometimes dramatically, which means you could lose money.

·Allocation risk. The ability of the fund to achieve its investment goal depends, in part, on the ability of the fund's portfolio manager to allocate effectively the fund's assets among equity and fixed-income securities. There can be no assurance that the actual allocations will be effective in achieving the fund's investment goal.

·Correlation risk. Although the prices of equity securities and fixed-income securities, as well as other asset classes, often rise and fall at different times so that a fall in the price of one may be offset by a rise in the price of the other, in down markets the prices of these securities and asset classes can also fall in tandem. Because the fund allocates its investments among different asset classes, the fund is subject to correlation risk.

·Risks of stock investing. Stocks generally fluctuate more in value than bonds and may decline significantly over short time periods. There is the chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The market value of a stock may decline due to general weakness in the stock market or because of factors that affect the company or its particular industry.

·Growth and value stock risk. By investing in a mix of growth and value companies, the fund assumes the risks of both. Investors often expect growth companies to increase their earnings at a certain rate. If these expectations are not met, investors can punish the stocks inordinately, even if earnings do increase. In addition, growth stocks typically lack the dividend yield that can cushion stock prices in market downturns. Value stocks involve the risk that they may never reach their expected full market value, either because the market fails to recognize the stock's intrinsic worth, or the expected value was misgauged. They also may decline in price even though in theory they are already undervalued.

·Interest rate risk. Prices of bonds tend to move inversely with changes in interest rates. Typically, a rise in rates will adversely affect bond prices and, accordingly, the fund's share price. The longer the effective maturity and duration of the fund's fixed-income portfolio, the more the fund's share price is likely to react to interest rates.

·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 bond, can cause a bond's price to fall, potentially lowering the fund's share price. The lower a bond's credit rating, the greater the chance – in the rating agency's opinion – that the bond issuer will default or fail to meet its payment obligations.

·Liquidity risk. When there is little or no active trading market for a security, the fund may not be able to sell the security in a timely manner at its perceived value, which could cause the fund's share price to fall.

·Portfolio turnover risk. The fund may engage in short-term trading, which could produce higher transaction costs and taxable distributions, and lower the fund's after-tax performance.

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 compares the average annual total returns of the fund's shares to those of a broad measure of market performance. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Sales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown. More recent performance information may be available at www.dreyfus.com.

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

Best Quarter
Q2, 2003: 15.55%

Worst Quarter
Q4, 2008: -15.87%

Average Annual Total Returns (as of 12/31/12)

After-tax performance is shown only for Class A shares. After-tax performance of the fund's other share classes will vary. After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

The fund's performance represents the performance of a predecessor fund's shares for periods prior to January 31, 2004, as adjusted to reflect the fund's applicable sales loads, and the performance of the respective class of fund shares thereafter (except for Class Z, the performance for which reflects that of the fund's Class J shares (which are not offered in this prospectus) for the period January 31, 2004 through December 17, 2004 and the performance of the fund's Class Z shares thereafter). Performance figures for periods prior to January 31, 2004 (December 17, 2004 for Class Z) have not been adjusted to reflect the fund's operating expenses; if these expenses had been reflected, such performance may have been lower.

Average Annual Returns Dreyfus Balanced Opportunity Fund	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years	Average Annual Returns, Inception Date
Class A	7.00%	0.94%	4.42%	Jan. 31, 2004
Class C	11.61%	1.36%	4.34%	Jan. 31, 2004
Class I	13.84%	2.42%	5.24%	Jan. 31, 2004
Class Z	13.43%	2.16%	5.10%	Dec. 17, 2004
After Taxes on Distributions Class A	6.80%	0.63%	3.85%
After Taxes on Distributions and Sale of Fund Shares Class A	4.83%	0.72%	3.73%
Standard & Poor's 500 Composite Stock Price Index, reflects no deduction for fees, expenses or taxes	15.99%	1.66%	7.10%
Barclays Capital U.S. Aggregate Bond Index, reflects no deduction for fees, expenses or taxes	4.22%	5.95%	5.18%

[1] Class A shares bought without an initial sales charge as part of an investment of $1 million or more may be charged a deferred sales charge of 1.00% if redeemed within one year. Class Z shares are generally not available for new accounts.

[1] The Dreyfus Corporation has contractually agreed to waive receipt of its fees and/or assume the expenses of the fund until April 1, 2014, so that the direct expenses of none of the classes (excluding Rule 12b-1 fees, shareholder services fees, taxes, interest, brokerage commissions, commitment fees on borrowings and extraordinary expenses) exceed .95%. On or after April 1, 2014, The Dreyfus Corporation may terminate this expense waiver at any time.

XML

Document and Entity Information	0 Months Ended
	Nov. 30, 2012
Risk/Return:
Document Type	485BPOS
Document Period End Date	Nov. 30, 2012
Registrant Name	DREYFUS MANAGER FUNDS II
Central Index Key	0001224568
Amendment Flag	false
Document Creation Date	Mar. 28, 2013
Document Effective Date	Apr. 01, 2013
Prospectus Date	Apr. 01, 2013
Dreyfus Balanced Opportunity Fund | Dreyfus Balanced Opportunity Fund | Class A
Risk/Return:
Trading Symbol	DBOAX
Dreyfus Balanced Opportunity Fund | Dreyfus Balanced Opportunity Fund | Class C
Risk/Return:
Trading Symbol	DBOCX
Dreyfus Balanced Opportunity Fund | Dreyfus Balanced Opportunity Fund | Class I
Risk/Return:
Trading Symbol	DBORX
Dreyfus Balanced Opportunity Fund | Dreyfus Balanced Opportunity Fund | Class Z
Risk/Return:
Trading Symbol	DBOZX
Dreyfus Balanced Opportunity Fund | Dreyfus Balanced Opportunity Fund | Class J
Risk/Return:
Trading Symbol	TJPBX

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Fund Summary

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund seeks high total return through a combination of capital appreciation and current income.

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.

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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2014-04-01

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 117.20% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

117.20%

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 one-year example and the first year of the three-, five-, and ten-years examples are based on net operating expenses, which reflect the expense 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

To pursue its goal, the fund invests in a diversified mix of stocks and fixed-income securities. The fund selects securities that, in the portfolio managers' judgment, will result in the highest total return consistent with preservation of principal. The fund varies the mix of stocks and bonds from time to time, but normally the fund allocates between 25% and 50% of its assets to fixed-income securities. The fund has appointed an asset allocation manager who will allocate fund assets among the fund's equity portfolio managers and the fund's fixed-income portfolio managers, based on an assessment of the relative return and risk of each asset class, analyzing several factors, including general economic conditions, anticipated future changes in interest rates and the outlook for stocks generally.

In seeking to achieve a high relative risk-adjusted return on the fund's equity investments, the equity managers create a broadly diversified equity portfolio for the fund that includes a blend of growth stocks and value stocks. Stock selection is made through extensive quantitative and fundamental research.

The fixed-income portion of the fund's portfolio may include corporate bonds, debentures, notes, mortgage-related securities, including collateralized mortgage obligations (CMOs), asset-backed securities, convertible securities, municipal obligations, zero coupon bonds, and money market instruments. The fund invests principally in securities that, when purchased, are rated investment grade (Baa/BBB or higher) or are the unrated equivalent as determined by The Dreyfus Corporation, and in securities that are issued or guaranteed by the U.S. government, including Treasury inflation-protected securities (TIPS). The fund has no limit with respect to its portfolio maturity or duration.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. It is not a complete investment program. The fund's share price fluctuates, sometimes dramatically, which means you could lose money.

·Allocation risk. The ability of the fund to achieve its investment goal depends, in part, on the ability of the fund's portfolio manager to allocate effectively the fund's assets among equity and fixed-income securities. There can be no assurance that the actual allocations will be effective in achieving the fund's investment goal.

·Correlation risk. Although the prices of equity securities and fixed-income securities, as well as other asset classes, often rise and fall at different times so that a fall in the price of one may be offset by a rise in the price of the other, in down markets the prices of these securities and asset classes can also fall in tandem. Because the fund allocates its investments among different asset classes, the fund is subject to correlation risk.

·Risks of stock investing. Stocks generally fluctuate more in value than bonds and may decline significantly over short time periods. There is the chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The market value of a stock may decline due to general weakness in the stock market or because of factors that affect the company or its particular industry.

·Growth and value stock risk. By investing in a mix of growth and value companies, the fund assumes the risks of both. Investors often expect growth companies to increase their earnings at a certain rate. If these expectations are not met, investors can punish the stocks inordinately, even if earnings do increase. In addition, growth stocks typically lack the dividend yield that can cushion stock prices in market downturns. Value stocks involve the risk that they may never reach their expected full market value, either because the market fails to recognize the stock's intrinsic worth, or the expected value was misgauged. They also may decline in price even though in theory they are already undervalued.

·Interest rate risk. Prices of bonds tend to move inversely with changes in interest rates. Typically, a rise in rates will adversely affect bond prices and, accordingly, the fund's share price. The longer the effective maturity and duration of the fund's fixed-income portfolio, the more the fund's share price is likely to react to interest rates.

·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 bond, can cause a bond's price to fall, potentially lowering the fund's share price. The lower a bond's credit rating, the greater the chance – in the rating agency's opinion – that the bond issuer will default or fail to meet its payment obligations.

·Liquidity risk. When there is little or no active trading market for a security, the fund may not be able to sell the security in a timely manner at its perceived value, which could cause the fund's share price to fall. Investments in foreign securities tend to have greater exposure to liquidity risk than domestic securities.

·Portfolio turnover risk. The fund may engage in short-term trading, which could produce higher transaction costs and taxable distributions, and lower the fund's after-tax performance.

Risk Lose Money [Text]

rr_RiskLoseMoney

The fund's share price fluctuates, sometimes dramatically, which means you could lose money.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. It is not a complete investment program.

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 J shares from year to year. The table compares the average annual total returns of the fund's shares to those of a broad measure of market performance. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Sales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown. More recent performance 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 (%) -- Class J

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

Sales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter
Q2, 2003: 15.55%

Worst Quarter
Q4, 2008: -15.71%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2003

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

15.55%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(15.71%)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

reflects no deduction for fees, expenses or taxes

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

The table below represents the performance of a predecessor fund's shares for periods prior to January 31, 2004 and the performance of the fund's Class J shares thereafter. Performance figures for periods prior to January 31, 2004 have not been adjusted to reflect the fund's operating expenses; if these expenses had been reflected, such performance may have been lower.

Caption

rr_AverageAnnualReturnCaption

Average Annual Total Returns (as of 12/31/12)

Standard & Poor's 500 Composite Stock Price Index, reflects no deduction for fees, expenses or taxes

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

15.99%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.66%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

7.10%

Barclays Capital U.S. Aggregate Bond Index, reflects no deduction for fees, expenses or taxes

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

4.22%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

5.95%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.18%

Class J

Risk/Return:

rr_RiskReturnAbstract

Management fees

rr_ManagementFeesOverAssets

0.80%

Other expenses (including shareholder services fees)

rr_OtherExpensesOverAssets

0.26%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.06%

Fee waiver and/or expense reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.11%)

^[1]

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

rr_NetExpensesOverAssets

0.95%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

108

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

326

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

574

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,284

Annual Return 2003

rr_AnnualReturn2003

21.96%

Annual Return 2004

rr_AnnualReturn2004

7.01%

Annual Return 2005

rr_AnnualReturn2005

(1.31%)

Annual Return 2006

rr_AnnualReturn2006

9.63%

Annual Return 2007

rr_AnnualReturn2007

5.26%

Annual Return 2008

rr_AnnualReturn2008

(27.68%)

Annual Return 2009

rr_AnnualReturn2009

22.06%

Annual Return 2010

rr_AnnualReturn2010

13.43%

Annual Return 2011

rr_AnnualReturn2011

(1.56%)

Annual Return 2012

rr_AnnualReturn2012

13.68%

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

13.68%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

2.30%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

5.23%

Class J | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

13.44%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.96%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.62%

Class J | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

9.22%

Average Annual Returns, 5 Years

rr_AverageAnnualReturnYear05

1.87%

Average Annual Returns, 10 Years

rr_AverageAnnualReturnYear10

4.44%

[1] The Dreyfus Corporation has contractually agreed to waive receipt of its fees and/or expenses of the fund until April 1, 2014, so that the direct expenses of none of the classes (excluding Rule 12b-1 fees, shareholder services fees, taxes, interest, brokerage commissions, commitment fees on borrowing and extraordinary expenses) exceed .95%. On or after April 1, 2014, The Dreyfus Corporation may terminate this expense waiver at any time.

XML

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

XML

Dreyfus Balanced Opportunity Fund | Dreyfus Balanced Opportunity Fund

Fund Summary

Investment Objective

The fund seeks high total return through a combination of capital appreciation and current income.

Fees and Expenses

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

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

Annual Fund Operating Expenses		Dreyfus Balanced Opportunity Fund Class J
Management fees		0.80%
Other expenses		0.26%
Total annual fund operating expenses		1.06%
Fee waiver and/or expense reimbursement	[1]	(0.11%)
Total annual fund operating expenses (after fee waiver and/or expense reimbursement)		0.95%

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 one-year example and the first year of the three-, five-, and ten-years examples are based on net operating expenses, which reflect the expense 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
Dreyfus Balanced Opportunity Fund Class J	108	326	574	1,284

Portfolio Turnover

The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 117.20% of the average value of its portfolio.

Principal Investment Strategy

To pursue its goal, the fund invests in a diversified mix of stocks and fixed-income securities. The fund selects securities that, in the portfolio managers' judgment, will result in the highest total return consistent with preservation of principal. The fund varies the mix of stocks and bonds from time to time, but normally the fund allocates between 25% and 50% of its assets to fixed-income securities. The fund has appointed an asset allocation manager who will allocate fund assets among the fund's equity portfolio managers and the fund's fixed-income portfolio managers, based on an assessment of the relative return and risk of each asset class, analyzing several factors, including general economic conditions, anticipated future changes in interest rates and the outlook for stocks generally.

In seeking to achieve a high relative risk-adjusted return on the fund's equity investments, the equity managers create a broadly diversified equity portfolio for the fund that includes a blend of growth stocks and value stocks. Stock selection is made through extensive quantitative and fundamental research.

The fixed-income portion of the fund's portfolio may include corporate bonds, debentures, notes, mortgage-related securities, including collateralized mortgage obligations (CMOs), asset-backed securities, convertible securities, municipal obligations, zero coupon bonds, and money market instruments. The fund invests principally in securities that, when purchased, are rated investment grade (Baa/BBB or higher) or are the unrated equivalent as determined by The Dreyfus Corporation, and in securities that are issued or guaranteed by the U.S. government, including Treasury inflation-protected securities (TIPS). The fund has no limit with respect to its portfolio maturity or duration.

Principal Risks

An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. It is not a complete investment program. The fund's share price fluctuates, sometimes dramatically, which means you could lose money.

·Allocation risk. The ability of the fund to achieve its investment goal depends, in part, on the ability of the fund's portfolio manager to allocate effectively the fund's assets among equity and fixed-income securities. There can be no assurance that the actual allocations will be effective in achieving the fund's investment goal.

·Correlation risk. Although the prices of equity securities and fixed-income securities, as well as other asset classes, often rise and fall at different times so that a fall in the price of one may be offset by a rise in the price of the other, in down markets the prices of these securities and asset classes can also fall in tandem. Because the fund allocates its investments among different asset classes, the fund is subject to correlation risk.

·Risks of stock investing. Stocks generally fluctuate more in value than bonds and may decline significantly over short time periods. There is the chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The market value of a stock may decline due to general weakness in the stock market or because of factors that affect the company or its particular industry.

·Growth and value stock risk. By investing in a mix of growth and value companies, the fund assumes the risks of both. Investors often expect growth companies to increase their earnings at a certain rate. If these expectations are not met, investors can punish the stocks inordinately, even if earnings do increase. In addition, growth stocks typically lack the dividend yield that can cushion stock prices in market downturns. Value stocks involve the risk that they may never reach their expected full market value, either because the market fails to recognize the stock's intrinsic worth, or the expected value was misgauged. They also may decline in price even though in theory they are already undervalued.

·Interest rate risk. Prices of bonds tend to move inversely with changes in interest rates. Typically, a rise in rates will adversely affect bond prices and, accordingly, the fund's share price. The longer the effective maturity and duration of the fund's fixed-income portfolio, the more the fund's share price is likely to react to interest rates.

·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 bond, can cause a bond's price to fall, potentially lowering the fund's share price. The lower a bond's credit rating, the greater the chance – in the rating agency's opinion – that the bond issuer will default or fail to meet its payment obligations.

·Liquidity risk. When there is little or no active trading market for a security, the fund may not be able to sell the security in a timely manner at its perceived value, which could cause the fund's share price to fall. Investments in foreign securities tend to have greater exposure to liquidity risk than domestic securities.

·Portfolio turnover risk. The fund may engage in short-term trading, which could produce higher transaction costs and taxable distributions, and lower the fund's after-tax performance.

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 J shares from year to year. The table compares the average annual total returns of the fund's shares to those of a broad measure of market performance. The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future. Sales charges, if any, are not reflected in the bar chart, and if those charges were included, returns would have been less than those shown. More recent performance may be available at www.dreyfus.com.

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

Best Quarter
Q2, 2003: 15.55%

Worst Quarter
Q4, 2008: -15.71%

Average Annual Total Returns (as of 12/31/12)

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.

The table below represents the performance of a predecessor fund's shares for periods prior to January 31, 2004 and the performance of the fund's Class J shares thereafter. Performance figures for periods prior to January 31, 2004 have not been adjusted to reflect the fund's operating expenses; if these expenses had been reflected, such performance may have been lower.

Average Annual Returns Dreyfus Balanced Opportunity Fund	Average Annual Returns, 1 Year	Average Annual Returns, 5 Years	Average Annual Returns, 10 Years
Class J	13.68%	2.30%	5.23%
After Taxes on Distributions Class J	13.44%	1.96%	4.62%
After Taxes on Distributions and Sale of Fund Shares Class J	9.22%	1.87%	4.44%
Standard & Poor's 500 Composite Stock Price Index, reflects no deduction for fees, expenses or taxes	15.99%	1.66%	7.10%
Barclays Capital U.S. Aggregate Bond Index, reflects no deduction for fees, expenses or taxes	4.22%	5.95%	5.18%

[1] The Dreyfus Corporation has contractually agreed to waive receipt of its fees and/or expenses of the fund until April 1, 2014, so that the direct expenses of none of the classes (excluding Rule 12b-1 fees, shareholder services fees, taxes, interest, brokerage commissions, commitment fees on borrowing and extraordinary expenses) exceed .95%. On or after April 1, 2014, The Dreyfus Corporation may terminate this expense waiver at any time.