Label

Element

Value

Risk/Return:

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Risk/Return [Heading]

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Fund Summary- Dreyfus Growth Allocation Fund

Objective [Heading]

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Investment Objective

Objective, Primary [Text Block]

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The fund seeks long-term capital appreciation with some consideration for current income.

Expense [Heading]

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Fees and Expenses

Expense Narrative [Text Block]

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

Operating Expenses Caption [Text]

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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

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2016-01-01

Portfolio Turnover [Heading]

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Portfolio Turnover

Portfolio Turnover [Text Block]

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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 27.19% of the average value of its portfolio.

Portfolio Turnover, Rate

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27.19%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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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 limitation by The Dreyfus Corporation. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

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Principal Investment Strategy

Strategy Narrative [Text Block]

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To pursue its goal, the fund normally allocates its net assets among other mutual funds advised by The Dreyfus Corporation or its affiliates, referred to as underlying funds, that invest in a wide range of equity and fixed-income securities. The fund normally allocates 80% of its assets to the equity asset class and 20% of its assets to the fixed-income asset class by investing in underlying funds that invest primarily in equity and fixed-income securities, respectively. The fund may invest in underlying funds that invest in U.S. large-, mid- and small-cap equity securities, international equity securities, emerging markets equity securities and global equity securities, which comprise the equity asset category. The fund also may invest in underlying funds that invest in U.S. and international fixed-income securities, which comprise the fixed-income asset category.

Although an investor may achieve the same level of diversification by investing directly in a variety of funds managed by The Dreyfus Corporation, the fund provides investors with a means to simplify their investment decisions by investing in a single diversified portfolio. The fund is designed for investors with high risk tolerances.

The Dreyfus Investment Committee selects the underlying funds based on their investment objectives and management policies, portfolio holdings, risk/reward profiles, historical performance, and other factors, including the correlation and covariance among the underlying funds. The underlying funds in which the fund may invest, as of the date of this prospectus, are as follows:

Equity Investments
U.S. Large-Cap	International
Dreyfus Appreciation Fund, Inc.	Dreyfus/Newton International Equity Fund
Dreyfus Research Growth Fund	Dreyfus International Equity Fund
Dreyfus Strategic Value Fund	Dreyfus International Value Fund
Dreyfus Disciplined Stock Fund	International Stock Fund
Dreyfus U.S. Equity Fund	Dreyfus International Stock Index Fund
Dreyfus BASIC S&P 500 Stock Index Fund	Emerging Markets
U.S. Mid-/Small-Cap	Dreyfus Emerging Markets Fund
Dreyfus Select Managers Small Cap Value Fund	Dreyfus Global Emerging Markets Fund
Dreyfus Opportunistic Midcap Value Fund	Global
Dreyfus Structured MidCap Fund	Dreyfus Global Absolute Return Fund
Dreyfus/The Boston Company Small/Mid Cap Growth Fund	Dreyfus Global Real Estate Securities Fund
Dreyfus Smallcap Stock Index Fund
Dreyfus Midcap Index Fund, Inc.
Fixed-Income Investments
U.S. Fixed-Income	International Fixed-Income
Dreyfus Intermediate Term Income Fund	Dreyfus Emerging Markets Debt Local Currency Fund
Dreyfus Short Duration Bond Fund	Dreyfus International Bond Fund
Dreyfus GNMA Fund
Dreyfus Opportunistic Fixed Income Fund
Dreyfus High Yield Fund
Dreyfus Bond Market Index Fund
Dreyfus Inflation Adjusted Securities Fund
Dreyfus U.S. Treasury Intermediate Term Fund
Dreyfus U.S. Treasury Long Term Fund

Risk [Heading]

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Principal Risks

Risk Narrative [Text Block]

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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.

An investment in the fund is subject to the following principal risks:

·Allocation risk. The ability of the fund to achieve its investment goal depends, in part, on the ability of the Dreyfus Investment Committee to allocate effectively the fund's assets among the underlying funds. There can be no assurance that the actual allocations will be effective in achieving the fund's investment goal. The underlying funds may not achieve their investment objectives, and their performance may be lower than that of the overall performance of the asset class the underlying funds were selected to represent. The fund typically invests in a number of different underlying funds; however, to the extent the fund invests a significant portion of its assets in a single underlying fund, the fund will be more sensitive to the risks associated with that underlying fund and any investments in which that underlying fund concentrates.

·Conflicts of interest risk. The fund's investment adviser, The Dreyfus Corporation, or its affiliates may serve as investment adviser to the underlying funds. The interests of the fund on the one hand, and those of an underlying fund on the other, will not always be the same. Therefore, conflicts may arise as the investment adviser fulfills its fiduciary duty to the fund and the underlying funds. In addition, the Dreyfus Investment Committee recommends asset allocations among the underlying funds, each of which pays advisory fees at different rates to The Dreyfus Corporation or its affiliates. These situations are considered by the fund's board when it reviews the asset allocations for the fund.

·Correlation risk.Although the prices of equity securities and fixed-income securities 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 can also fall in tandem. Because the fund allocates its assets among underlying funds that invest in equity securities and fixed-income securities, it is subject to correlation risk.

The fund is subject to the same principal risks as the underlying funds in which it invests, which are summarized below. For more information regarding these and other risks of the underlying funds, see the prospectus for the specific underlying fund.

·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 market conditions or because of factors that affect the particular company or the company's industry.

·Large cap stock risk. To the extent the fund invests in large capitalization stocks, the fund may underperform funds that invest primarily in the stocks of lower quality, smaller capitalization companies during periods when the stocks of such companies are in favor.

·Small and midsize company risk. Small and midsize companies carry additional risks because the operating histories of these companies tend to be more limited, their earnings and revenues less predictable (and some companies may be experiencing significant losses), and their share prices more volatile than those of larger, more established companies. The shares of smaller companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these securities and the fund's ability to sell these securities.

·Foreign investment risk. To the extent the fund invests in foreign securities, the fund's performance will be influenced by political, social and economic factors affecting investments in foreign issuers. Special risks associated with investments in foreign issuers include exposure to currency fluctuations, less liquidity, less developed or less efficient trading markets, lack of comprehensive company information, political and economic instability and differing auditing and legal standards. Investments denominated in foreign currencies are subject to the risk that such currencies will decline in value relative to the U.S. dollar and affect the value of these investments held by the fund.

·Fixed-income market risk. The market value of a fixed-income security may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. The fixed-income securities market can be susceptible to increases in volatility and decreases in liquidity. Liquidity can decline unpredictably in response to overall economic conditions or credit tightening. Increases in volatility and decreases in liquidity may be caused by a rise in interest rates (or the expectation of a rise in interest rates), which are at or near historic lows in the United States and in other countries. An unexpected increase in fund redemption requests, including requests from shareholders who may own a significant percentage of the fund's shares, which may be triggered by market turmoil or an increase in interest rates, could cause the fund to sell its holdings at a loss or at undesirable prices and adversely affect the fund's share price and increase the fund's liquidity risk, fund expenses and/or taxable distributions.

·Interest rate risk. Prices of bonds and other fixed-income securities tend to move inversely with changes in interest rates. Typically, a rise in rates will adversely affect fixed-income securities and, accordingly, will cause the value of the fund's investments in these securities to decline. During periods of very low interest rates, which occur from time to time due to market forces or actions of governments and/or their central banks, including the Board of Governors of the Federal Reserve System in the U.S., the fund may be subject to a greater risk of principal decline from rising interest rates. When interest rates fall, the values of already-issued fixed-income securities generally rise. However, when interest rates fall, the fund's investments in new securities may be at lower yields and may reduce the fund's income. The magnitude of these fluctuations in the market price of fixed-income securities is generally greater for securities with longer effective maturities and durations because such instruments do not mature, reset interest rates or become callable for longer periods of time. The change in the value of a fixed-income security or portfolio can be approximated by multiplying its duration by a change in interest rates. For example, the market price of a fixed-income security with a duration of three years would be expected to decline 3% if interest rates rose 1%. Conversely, the market price of the same security would be expected to increase 3% if interest rates fell 1%. Risks associated with rising interest rates are heightened given that interest rates in the United States and other countries are at or near historic lows. Unlike investment grade bonds, however, the prices of high yield bonds may fluctuate unpredictably and not necessarily inversely with changes in interest rates. Interest rate changes may have different effects on the values of mortgage-related securities because of prepayment and extension risks.

·Issuer risk. A security's market value may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer's products or services, or factors that affect the issuer's industry, such as labor shortages or increased production costs and competitive conditions within an industry.

·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 in a timely manner at or near their perceived value. In such a market, the value of such securities and the fund's share price may fall dramatically, even during periods of declining interest rates. Investments that are illiquid or that trade in lower volumes may be more difficult to value. The market for below investment grade securities may be less liquid and therefore these securities may be harder to value or sell at an acceptable price, especially during times of market volatility or decline. Investments in foreign securities, particularly those of issuers located in emerging markets, tend to have greater exposure to liquidity risk than domestic securities.

·Credit risk. Failure of an issuer of a security to make timely interest or principal payments, or a decline or perception of a decline in the credit quality of the security, can cause the security's price to fall, lowering the value of the fund's investment in such security. The lower a security's credit rating, the greater the chance that the issuer of the security will default or fail to meet its payment obligations.

·High yield securities risk. High yield ("junk") securities involve greater credit risk, including the risk of default, than investment grade securities, and are considered predominantly speculative with respect to the issuer's continuing ability to make principal and interest payments. The prices of high yield securities can fall in response to bad news about the issuer or its industry, or the economy in general to a greater extent than those of higher rated securities.

·Market sector risk. The fund may significantly overweight or underweight certain companies, industries or market sectors, which may cause the fund's performance to be more or less sensitive to developments affecting those companies, industries or sectors.

Risk Lose Money [Text]

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

Risk Not Insured Depository Institution [Text]

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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]

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Performance

Performance Narrative [Text Block]

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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 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. More recent performance information may be available at www.dreyfus.com.

Performance Information Illustrates Variability of Returns [Text]

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

Performance Availability Website Address [Text]

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www.dreyfus.com

Performance Past Does Not Indicate Future [Text]

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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]

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

Bar Chart Closing [Text Block]

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Best Quarter
Q3, 2010: 10.60%

Worst Quarter
Q3, 2011: (13.68)%

The fund's year-to-date total return as of September 30, 2014 was 3.17%

Year to Date Return, Label

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year-to-date total return

Bar Chart, Year to Date Return, Date

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Sep. 30, 2014

Bar Chart, Year to Date Return

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3.17%

Highest Quarterly Return, Label

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Best Quarter

Highest Quarterly Return, Date

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Sep. 30, 2010

Highest Quarterly Return

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10.60%

Lowest Quarterly Return, Label

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Worst Quarter

Lowest Quarterly Return, Date

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Sep. 30, 2011

Lowest Quarterly Return

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(13.68%)

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

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reflects no deduction for fees, expenses or taxes

Performance Table Uses Highest Federal Rate

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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

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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

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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.

Caption

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Average Annual Total Returns (as of 12/31/13)

Standard & Poor's 500 Composite Stock Price Index ("S&P 500") reflects no deduction for fees, expenses or taxes

Risk/Return:

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Average Annual Returns, 1 Year

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32.37%

Average Annual Returns, Since Inception

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16.49%

Average Annual Returns, Inception Date

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Oct. 01, 2009

Customized Blended Index (80% S&P 500 and 20% Barclays U.S. Aggregate Bond Index) reflects no deduction for fees, expenses or taxes

Risk/Return:

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Average Annual Returns, 1 Year

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24.78%

Average Annual Returns, Since Inception

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14.06%

Average Annual Returns, Inception Date

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Oct. 01, 2009

Dreyfus Growth Allocation Fund

Risk/Return:

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Management fees

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none

Other expenses (including shareholder services fees)

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0.73%

Underlying funds fees and expenses

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0.82%

Total annual fund and underlying funds operating expenses

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1.55%

Fee waiver and/or expense reimbursement

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(0.38%)

^[1]

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

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1.17%

Expense Example, with Redemption, 1 Year

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119

Expense Example, with Redemption, 3 Years

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452

Expense Example, with Redemption, 5 Years

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809

Expense Example, with Redemption, 10 Years

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1,813

Annual Return 2010

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13.95%

Annual Return 2011

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(3.20%)

Annual Return 2012

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13.01%

Annual Return 2013

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18.89%

Average Annual Returns, 1 Year

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18.89%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

10.93%

Average Annual Returns, Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 01, 2009

Dreyfus Growth Allocation Fund | After Taxes on Distributions

Risk/Return:

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Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

18.05%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

10.45%

Dreyfus Growth Allocation Fund | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

Average Annual Returns, 1 Year

rr_AverageAnnualReturnYear01

11.13%

Average Annual Returns, Since Inception

rr_AverageAnnualReturnSinceInception

9.32%

[1] The fund's investment adviser, The Dreyfus Corporation, has contractually agreed, until January 1, 2016, to assume the expenses of the fund so that the total annual fund and underlying funds operating expenses (excluding taxes, interest expense, brokerage commissions, commitment fees on borrowings and extraordinary expenses) do not exceed 1.17%. On or after January 1, 2016, The Dreyfus Corporation may terminate this expense limitation at any time.