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AIM GROWTH SERIES (INVESCO GROWTH SERIES)

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Fund Summaries - INVESCO BALANCED-RISK RETIREMENT NOW FUND

Objective, Primary [Text Block]

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The Fund’s investment objective is to provide real return and,

Expense [Heading]

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Fees and Expenses of the Fund

Shareholder Fees Caption [Text]

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Shareholder Fees (fees paid directly from your investment)

Fee Waiver or Reimbursement over Assets, Date of Termination

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April 30, 2021

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 rate 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 11% of the average value of its portfolio.

Expense Breakpoint Discounts [Text]

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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 the Invesco Funds. More information about these and other discounts is available from your financial professional and in the section “Shareholder Account Information – Initial Sales Charges (Class A Shares Only)” on page A-3 of the prospectus and the section “Purchase, Redemption and Pricing of Shares-Purchase and Redemption of Shares” on page I-1 of the statement of additional information (SAI).

Expense Example [Heading]

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Example.

Expense Example, No Redemption Narrative [Text Block]

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

Strategy Narrative [Text Block]

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The Fund seeks to meet its investment objective by building a portfolio that includes Invesco Balanced-Risk Allocation Fund and two affiliated money market funds, Invesco Government & Agency Portfolio and Invesco Treasury Portfolio. The Fund will generally rebalance its assets to the Fund’s target allocations on a monthly basis. A list of the underlying funds and their approximate target fund weightings as of February 28, 2020 is set forth below:

Underlying Funds	Invesco Balanced-Risk Retirement Now Fund
Invesco Balanced-Risk Allocation Fund	59.02%

Invesco Government & Agency Portfolio	24.59%

Invesco Treasury Portfolio	16.39%
Total	100%

The Fund’s name indicates that an investor in the Fund plans to retire and may stop making new investments in the Fund. Consistent with the Fund’s real return and capital preservation objectives, the Fund is designed for investors who expect to need all or most of their money in the Fund at retirement and for investors who plan to withdraw the value of their account in the Fund gradually after retirement. Real return is total return reduced by the impact of inflation.

The following chart displays how Invesco Advisers, Inc. (Invesco or the Adviser) expects the asset allocation for the Invesco Balanced-Risk Retirement Funds to change as their target retirement dates approach. The Invesco Balanced-Risk Retirement Funds employ a risk-balanced optimization process which accounts for the glide path (the glide path is the rate at which the asset mix changes over time). The glide path will become more conservative on a quarterly basis. Investments in the affiliated money market funds will continue to increase and investments in Invesco Balanced-Risk Allocation Fund and Invesco Balanced-Risk Aggressive Allocation Fund, as applicable, will continue to decrease until approximately the target retirement date. Because the Fund is designed for investors who have already reached their target retirement date, the Fund's asset allocation is not expected to change. The actual asset allocations for the Fund may differ from those shown in the chart below.

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The following table lists the current target market exposures through Invesco Balanced-Risk Allocation Fund to equities, commodities and fixed income and through Invesco Government & Agency Portfolio and Invesco Treasury Portfolio to cash equivalents. The portfolio managers actively adjust portfolio positions in Invesco Balanced-Risk Allocation Fund to seek to minimize loss of capital, benefit from market opportunities and reduce excessive volatility. Due to the use of derivatives and other instruments that create leverage in Invesco Balanced-Risk Allocation Fund, an underlying fund, the percentages may not equal 100%. The Fund’s target allocations may change over time and at any point in time the Fund’s actual asset allocations may be higher or lower than the target allocations shown in the chart below.

	Target Allocation from Retirement
	At Retirement Date
Equities	24.95%

Commodities	11.45%

Fixed Income	47.16%

Cash Equivalents	40.00%

An investment in the Fund is not guaranteed, and you may experience losses, including near to, at, or after your target retirement date. There is no guarantee that the Fund will provide adequate income at or through your retirement.

Investment Objectives and Strategies of the Underlying Funds

Invesco Balanced-Risk Allocation Fund. Invesco Balanced-Risk Allocation Fund’s investment objective is to provide total return with a low to moderate correlation to traditional financial market indices. Invesco Balanced-Risk Allocation Fund’s investment objective may be changed by the Board of Trustees (the Board) without shareholder approval.

Invesco Balanced-Risk Allocation Fund’s investment strategy is designed to provide capital loss protection during down markets by investing in multiple asset classes. Under normal market conditions, Invesco Balanced-Risk Allocation Fund’s portfolio management team allocates across three asset classes: equities, fixed income and commodities, such that no one asset class drives Invesco Balanced-Risk Allocation Fund’s performance. Invesco Balanced-Risk Allocation Fund’s exposure to these three asset classes will be achieved primarily (generally over 65% based on notional exposure) through investments in derivative instruments including but not limited to futures, options and swap agreements.

The portfolio managers manage Invesco Balanced-Risk Allocation Fund’s portfolio using two different processes. One is strategic asset allocation, which the portfolio managers use to express their long term views of the market. The portfolio managers apply their strategic process to, on average, approximately 80% of Invesco Balanced-Risk Allocation Fund’s portfolio risk, as determined by the portfolio managers’ proprietary risk analysis. The other process is tactical asset allocation, which is used by the portfolio managers to reflect their shorter term views of the market. The strategic and tactical processes are intended to adjust portfolio risk in a variety of market conditions.

The portfolio managers implement their investment decisions through the use of derivatives and other investments that create economic leverage. Invesco Balanced-Risk Allocation Fund uses derivatives and other leveraged instruments to create and adjust exposure to the asset classes. The portfolio managers make these adjustments to balance risk exposure when they believe it will benefit Invesco Balanced-Risk Allocation Fund. Using derivatives often allows the portfolio managers to implement their views more efficiently and to gain more exposure to the asset classes than investing in more traditional assets such as stocks and bonds would allow. The portfolio managers will also seek to generate income by writing (selling) put and call options on equities, equity indices and exchange-traded funds (ETFs). Invesco Balanced-Risk Allocation Fund may hold long and short positions in derivatives but seeks to maintain a net long position. A long derivative position involves Invesco Balanced-Risk Allocation Fund buying a derivative with the anticipation of a price increase of the underlying asset, and a short derivative position involves Invesco Balanced-Risk Allocation Fund writing (selling) a derivative with the anticipation of a price decrease of the underlying asset. Invesco Balanced-Risk Allocation Fund’s use of derivatives and the leveraged investment exposure created by the use of derivatives are expected to be significant and greater than most mutual funds.

Invesco Balanced-Risk Allocation Fund’s net asset value over a short to intermediate term is expected to be volatile because of the significant use of derivatives and other instruments that provide economic leverage including commodity-linked notes, ETFs and exchange-traded notes (ETNs). Volatility measures the range of returns of a security, fund or index, as indicated by the annualized standard deviation of its returns. Higher volatility generally indicates higher risk and is often reflected by frequent and sometimes significant movements up and down in value. It is expected that the annualized volatility level for Invesco Balanced-Risk Allocation Fund will be, on average, approximately 8%. Invesco Balanced-Risk Allocation Fund’s actual volatility level for longer or shorter periods may be materially higher or lower than the target level depending on market conditions, and therefore Invesco Balanced-Risk Allocation Fund’s risk exposure may be materially higher or lower than the level targeted by the portfolio managers.

Invesco Balanced-Risk Allocation Fund will have the potential for greater gains, as well as the potential for greater losses, than if Invesco Balanced-Risk Allocation Fund did not use derivatives or other instruments that have an economic leveraging effect. Economic leveraging tends to magnify, sometimes significantly depending on the amount of leverage used, the effect of any increase or decrease in Invesco Balanced-Risk Allocation Fund’s exposure to an asset class and may cause Invesco Balanced-Risk Allocation Fund’s net asset value to be more volatile than a fund that does not use leverage. For example, if Invesco Balanced-Risk Allocation Fund gains exposure to a specific asset class through an instrument that provides leveraged exposure to the class, and that leveraged instrument increases in value, the gain to Invesco Balanced-Risk Allocation Fund will be magnified; however, if the leveraged instrument decreases in value, the loss to Invesco Balanced-Risk Allocation Fund will be magnified.

The Adviser’s investment process has three steps. The first step involves asset selection within the three asset classes (equities, fixed income and commodities). The portfolio managers select investments to represent each of the three asset classes from a universe of over fifty investments. The selection process (1) evaluates a particular investment’s theoretical case for long-term excess returns relative to cash; (2) screens the identified investments against minimum liquidity criteria; and (3) reviews the expected correlation among the investments, meaning the likelihood that the value of the investments will move in the same direction at the same time, and the expected risk of each investment to determine whether the selected investments are likely to improve the expected risk adjusted return of Invesco Balanced-Risk Allocation Fund.

The second step in the investment process involves portfolio construction. The portfolio managers use their own estimates for risk and correlation to weight each asset class and the investments within each asset class to construct a portfolio that they believe is risk-balanced across the three asset classes. Periodically, the management team re-estimates the risk contributed by each asset class and investment and re-balances the portfolio; the portfolio also may be rebalanced when Invesco Balanced-Risk Allocation Fund makes new investments. Taken together, the first two steps in the process result in the strategic allocation.

In the third step of the investment process, using a systematic approach based on fundamental principles, the portfolio management team analyzes the asset classes and investments, considering the following factors: valuation, economic environment and historic price movements. Regarding valuation, the portfolio managers evaluate whether asset classes and investments are attractively priced relative to fundamentals. Next, the portfolio managers assess the economic environment and consider the effect that monetary policy and other determinants of economic growth, inflation and market volatility will have on the asset classes and investments. Lastly, the portfolio managers assess the impact of historic price movements for the asset classes and investments on likely future returns.

Utilizing the results from the analysis described above, the portfolio managers determine tactical short-term over-weight (buying additional assets relative to the strategic allocation) and under-weight (selling assets relative to the strategic allocation) positions for the asset classes and investments. The management team actively adjusts portfolio positions to reflect the near-term market environment, while remaining consistent with the balanced-risk long-term portfolio structure described in step two above.

Invesco Balanced-Risk Allocation Fund’s equity exposure will be achieved through investments in derivatives that track equity indices from developed countries. In addition, Invesco Balanced-Risk Allocation Fund may invest directly in common stock. Invesco Balanced-Risk Allocation Fund’s fixed income exposure will be achieved through derivative investments that offer exposure to issuers in developed markets that are rated investment grade or unrated but deemed to be investment grade quality by the Adviser, including U.S. and foreign government debt securities having intermediate (5 – 10 years) and long (10 plus years) term maturity. Invesco Balanced-Risk Allocation Fund’s commodity exposure will be achieved through investments in ETFs, commodity futures and swaps, ETNs and commodity-linked notes, some or all of which will be owned through Invesco Cayman Commodity Fund I Ltd., a wholly–owned subsidiary of Invesco Balanced-Risk Allocation Fund organized under the laws of the Cayman Islands (Subsidiary). The commodity investments will be focused in four sectors of the commodities market: energy, precious metals, industrial metals and agriculture/livestock.

Invesco Balanced-Risk Allocation Fund will invest in the Subsidiary to gain exposure to commodities markets. The Subsidiary, in turn, will invest in futures, swaps, commodity-linked notes, ETFs and ETNs. The Subsidiary is advised by the Adviser, has the same investment objective as Invesco Balanced-Risk Allocation Fund and generally employs the same investment strategy. Unlike Invesco Balanced-Risk Allocation Fund, however, the Subsidiary may invest without limitation in commodity-linked derivatives and other securities that may provide leveraged and non-leveraged exposure to commodities. The Subsidiary holds cash and can invest in cash equivalent instruments, including affiliated money market funds, some or all of which may serve as margin or collateral for the Subsidiary’s derivative positions. Because the Subsidiary is wholly-owned by Invesco Balanced-Risk Allocation Fund, Invesco Balanced-Risk Allocation Fund will be subject to the risks associated with any investment by the Subsidiary.

Invesco Balanced-Risk Allocation Fund generally will maintain 50% to 100% of its net assets (including assets held by the Subsidiary) in cash and cash equivalent instruments, including affiliated money market funds, as margin or collateral for Invesco Balanced-Risk Allocation Fund’s obligations under derivative transactions. The larger the value of Invesco Balanced-Risk Allocation Fund’s derivative positions, as opposed to positions held in non-derivative instruments, the more Invesco Balanced-Risk Allocation Fund will be required to maintain cash and cash equivalents as margin or collateral for such derivatives.

The derivative instruments principally used by Invesco Balanced-Risk Allocation Fund include but are not limited to futures, options and swap agreements.

Invesco Government & Agency Portfolio. Invesco Government & Agency Portfolio’s investment objective is to provide current income consistent with preservation of capital and liquidity. Invesco Government & Agency Portfolio’s investment objective may be changed by Invesco Government & Agency Portfolio’s Board of Trustees (the Board) without shareholder approval.

Invesco Government & Agency Portfolio invests at least 99.5% of its total assets in cash, Government Securities, and repurchase agreements collateralized by cash or Government Securities. In addition, at least 80% of Invesco Government & Agency Portfolio’s net assets (plus any borrowings for investment purposes) will be invested, under normal circumstances, in direct obligations of the U.S. Treasury and other securities issued or guaranteed as to principal and interest by the U.S. Government or its agencies and instrumentalities, as well as repurchase agreements secured by those obligations. Direct obligations of the U.S. Treasury generally include bills, notes and bonds. In contrast to Invesco Government & Agency Portfolio’s 99.5% policy, Invesco Government & Agency Portfolio’s 80% policy does not include cash or repurchase agreements collateralized by cash. Government Security generally means any security issued or guaranteed as to principal or interest by the U.S. Government or certain of its agencies or instrumentalities; or any certificate of deposit for any of the foregoing. Invesco Government & Agency Portfolio considers repurchase agreements with the Federal Reserve Bank of New York to be U.S. Government securities for purposes of Invesco Government & Agency Portfolio’s investment policies.

Invesco Government & Agency Portfolio will limit investments to those securities that are Eligible Securities as defined by applicable regulations at the time of purchase.

Invesco Government & Agency Portfolio is a Government Money Market Fund, as defined by Rule 2a-7 under the Investment Company Act of 1940, as amended (Rule 2a-7), that seeks to maintain a stable price of $1.00 per share by using the amortized cost method to value portfolio securities and rounding the share value to the nearest cent. Invesco Government & Agency Portfolio invests in conformity with U.S. Securities and Exchange Commission (SEC) rules and regulation requirements for money market funds for the quality, maturity, diversification and liquidity of investments. Invesco Government & Agency Portfolio invests only in U.S. dollar denominated securities maturing within 397 calendar days of the date of purchase, with certain exceptions permitted by applicable regulations. Invesco Government & Agency Portfolio maintains a dollar-weighted average portfolio maturity of no more than 60 calendar days, and a dollar-weighted average portfolio maturity as determined without exceptions regarding certain interest rate adjustments under Rule 2a-7 of no more than 120 calendar days. Each investment must be determined to present minimal credit risks by the Adviser pursuant to guidelines approved by Invesco Government & Agency Portfolio’s Board, and must be an Eligible Security.

In selecting securities for Invesco Government & Agency Portfolio’s portfolio, the portfolio managers focus on securities that offer safety, liquidity, and a competitive yield. The Adviser conducts a credit analysis of each potential issuer prior to the purchase of its securities.

The portfolio managers normally hold portfolio securities to maturity, but may sell a security when they deem it advisable, such as when market or credit factors materially change.

Invesco Treasury Portfolio. Invesco Treasury Portfolio’s investment objective is to provide current income consistent with preservation of capital and liquidity. Invesco Treasury Portfolio’s investment objective may be changed by Invesco Treasury Portfolio’s Board of Trustees (the Board) without shareholder approval.

Invesco Treasury Portfolio invests at least 99.5% of its total assets in cash, Government Securities, and repurchase agreements collateralized by cash or Government Securities. In addition, Invesco Treasury Portfolio invests under normal circumstances at least 80% of its net assets (plus any borrowings for investment purposes) in direct obligations of the U.S. Treasury including bills, notes and bonds, and repurchase agreements secured by those obligations. In contrast to Invesco Treasury Portfolio’s 99.5% policy, Invesco Treasury Portfolio’s 80% policy does not include cash or repurchase agreements collateralized by cash. Government Security generally means any security issued or guaranteed as to principal or interest by the U.S. Government or certain of its agencies or instrumentalities; or any certificate of deposit for any of the foregoing. Invesco Treasury Portfolio considers repurchase agreements with the Federal Reserve Bank of New York to be U.S. Government securities for purposes of Invesco Treasury Portfolio’s investment policies.

Invesco Treasury Portfolio will limit investments to those securities that are Eligible Securities as defined by applicable regulations at the time of purchase.

Invesco Treasury Portfolio is a Government Money Market Fund, as defined by Rule 2a-7 under the Investment Company Act of 1940, as amended (Rule 2a-7), that seeks to maintain a stable price of $1.00 per share by using the amortized cost method to value portfolio securities and rounding the share value to the nearest cent. Invesco Treasury Portfolio invests in conformity with SEC rules and regulation requirements for money market funds for the quality, maturity, diversification and liquidity of investments. Invesco Treasury Portfolio invests only in U.S. dollar denominated securities maturing within 397 calendar days of the date of purchase, with certain exceptions permitted by applicable regulations. Invesco Treasury Portfolio maintains a dollar-weighted average portfolio maturity of no more than 60 calendar days, and a dollar-weighted average portfolio maturity as determined without exceptions regarding certain interest rate adjustments under Rule 2a-7 of no more than 120 calendar days. Each investment must be determined to present minimal credit risks by the Adviser pursuant to guidelines approved by Invesco Treasury Portfolio’s Board, and must be an Eligible Security.

In selecting securities for Invesco Treasury Portfolio’s portfolio, the portfolio managers focus on securities that offer safety, liquidity, and a competitive yield. The Adviser conducts a credit analysis of each potential issuer prior to the purchase of its securities.

The portfolio managers normally hold portfolio securities to maturity, but may sell a security when they deem it advisable, such as when market or credit factors materially change.

Risk Narrative [Text Block]

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As with any mutual fund investment, loss of money is a risk of investing. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency. The risks associated with an investment in the Fund can increase during times of significant market volatility. Because the Fund is a fund of funds, the Fund is subject to the risks associated with the underlying funds in which it invests. The principal risks of investing in the Fund and the underlying funds are:

Allocation Risk. The Fund’s investment performance depends, in part, on how its assets are allocated among the underlying funds or asset classes. The Adviser’s evaluations and assumptions regarding the asset classes or the underlying funds in which the Fund invests may be incorrect, causing the Fund to be invested (or not invested) in one or more asset classes or underlying funds at an inopportune time, which could negatively affect the Fund’s performance.

Authorized Participant Concentration Risk. Only an authorized participant (AP) may engage in creation or redemption transactions directly with an underlying ETF. An underlying ETF has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares of an underlying ETF. This risk may be heightened to the extent that securities held by an underlying ETF are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to an underlying ETF and no other AP is able to step forward to create or redeem creation units for an underlying ETF, this may result in a significantly diminished trading market for shares of an underlying ETF, and the shares of an underlying ETF may be more likely to trade at a premium or discount to NAV and to face trading halts and/or delisting. Investments in non-U.S. securities, which may have lower trading volumes, may increase this risk.

Changing Fixed Income Market Conditions Risk. The current low interest rate environment was created in part by the Federal Reserve Board (FRB) and certain foreign central banks keeping the federal funds and equivalent foreign rates near historical lows. Increases in the federal funds and equivalent foreign rates may expose fixed income markets to heightened volatility and reduced liquidity for certain fixed income investments, particularly those with longer maturities. In addition, decreases in fixed income dealer market-making capacity may also potentially lead to heightened volatility and reduced liquidity in the fixed income markets. As a result, the value of an underlying fund’s investments and share price may decline. Changes in central bank policies could also result in higher than normal shareholder redemptions, which could potentially increase portfolio turnover and an underlying fund’s transaction costs.

Commodities Tax Risk. The tax treatment of commodity-linked derivative instruments may be adversely affected by changes in legislation, regulations or other legally binding authority. If, as a result of any such adverse action, the income of an underlying fund from certain commodity-linked derivatives was treated as non-qualifying income, an underlying fund might fail to qualify as a regulated investment company and be subject to federal income tax at the fund level. As a result of an announcement by the Internal Revenue Service (IRS), an underlying fund intends to invest in commodity-linked notes: (a) directly, relying on an opinion of counsel confirming that income from such investments should be qualifying income because such commodity-linked notes constitute securities under section 2(a)(36) of the Investment Company Act of 1940, as amended (1940 Act), or (b) indirectly through a wholly-owned foreign subsidiary. Should the IRS issue further guidance, or Congress enact legislation, that adversely affects the tax treatment of an underlying fund’s use of commodity-linked notes or a wholly-owned foreign subsidiary (which guidance might be applied to the underlying fund retroactively), it could, among other consequences, limit the underlying fund’s ability to pursue its investment strategy.

Commodity-Linked Notes Risk. In addition to risks associated with the underlying commodities, investments in commodity-linked notes may be subject to additional risks, such as non-payment of interest and loss of principal, counterparty risk, lack of a secondary market and risk of greater volatility than traditional equity and debt securities. The value of the commodity-linked notes an underlying fund buys may fluctuate significantly because the values of the underlying investments to which they are linked are themselves volatile. Additionally, certain commodity-linked notes employ “economic” leverage by requiring payment by the issuer of an amount that is a multiple of the price increase or decrease of the underlying commodity, commodity index, or other economic variable. Such economic leverage will increase the volatility of the value of these commodity-linked notes and an underlying fund to the extent it invests in such notes.

Commodity Risk. An underlying fund may have investment exposure to the commodities markets and/or a particular sector of the commodities markets, which may subject an underlying fund to greater volatility than investments in traditional securities, such as stocks and bonds. Volatility in the commodities markets may be caused by changes in overall market movements, domestic and foreign political and economic events and policies, war, acts of terrorism, changes in domestic or foreign interest rates and/or investor expectations concerning interest rates, domestic and foreign inflation rates, investment and trading activities of mutual funds, hedge funds and commodities funds, and factors such as drought, floods, weather, livestock disease, embargoes, tariffs and other regulatory developments, or supply and demand disruptions. Because an underlying fund’s performance may be linked to the performance of volatile commodities, investors should be willing to assume the risks of potentially significant fluctuations in the value of an underlying fund’s shares.

Correlation Risk. Because an underlying fund’s investment strategy seeks to balance risk across three asset classes and, within each asset class, across different countries and investments, to the extent either the asset classes or the selected countries and investments become correlated in a way not anticipated by an underlying fund’s adviser, an underlying fund’s risk allocation process may result in magnified risks and loss instead of balancing (reducing) the risk of loss.

Debt Securities Risk. The prices of debt securities held by an underlying fund will be affected by changes in interest rates, the creditworthiness of the issuer and other factors. An increase in prevailing interest rates typically causes the value of existing debt securities to fall and often has a greater impact on longer-duration debt securities and higher quality debt securities. Falling interest rates will cause an underlying fund to reinvest the proceeds of debt securities that have been repaid by the issuer at lower interest rates. Falling interest rates may also reduce an underlying fund’s distributable income because interest payments on floating rate debt instruments held by an underlying fund will decline. An underlying fund could lose money on investments in debt securities if the issuer or borrower fails to meet its obligations to make interest payments and/or to repay principal in a timely manner. Changes in an issuer’s financial strength, the market’s perception of such strength or in the credit rating of the issuer or the security may affect the value of debt securities. An underlying fund’s adviser’s credit analysis may fail to anticipate such changes, which could result in buying a debt security at an inopportune time or failing to sell a debt security in advance of a price decline or other credit event.

Derivatives Risk. The value of a derivative instrument depends largely on (and is derived from) the value of an underlying security, currency, commodity, interest rate, index or other asset (each referred to as an underlying asset). In addition to risks relating to the underlying assets, the use of derivatives may include other, possibly greater, risks, including counterparty, leverage and liquidity risks. Counterparty risk is the risk that the counterparty to the derivative contract will default on its obligation to pay the underlying fund the amount owed or otherwise perform under the derivative contract. Derivatives create leverage risk because they do not require payment up front equal to the economic exposure created by holding a position in the derivative. As a result, an adverse change in the value of the underlying asset could result in the underlying fund sustaining a loss that is substantially greater than the amount invested in the derivative or the anticipated value of the underlying asset, which may make the underlying fund’s returns more volatile and increase the risk of loss. Derivative instruments may also be less liquid than more traditional investments and the underlying fund may be unable to sell or close out its derivative positions at a desirable time or price. This risk may be more acute under adverse market conditions, during which the underlying fund may be most in need of liquidating its derivative positions. Derivatives may also be harder to value, less tax efficient and subject to changing government regulation that could impact the underlying fund’s ability to use certain derivatives or their cost. The SEC has proposed new regulations related to the use of derivatives and related instruments by registered investment companies. If adopted as proposed, these regulations would limit an underlying fund’s ability to engage in derivatives transactions and may result in increased costs or require an underlying fund to modify its investment strategies or to liquidate. Derivatives strategies may not always be successful. For example, derivatives used for hedging or to gain or limit exposure to a particular market segment may not provide the expected benefits, particularly during adverse market conditions. These risks are greater for certain underlying funds than most other mutual funds because certain underlying funds will implement their investment strategy primarily through derivative instruments rather than direct investments in stocks/bonds.

Exchange-Traded Funds Risk. In addition to the risks associated with the underlying assets held by the exchange-traded fund, investments in exchange-traded funds are subject to the following additional risks: (1) an exchange-traded fund’s shares may trade above or below its net asset value; (2) an active trading market for the exchange-traded fund’s shares may not develop or be maintained; (3) trading an exchange-traded fund’s shares may be halted by the listing exchange; (4) a passively-managed exchange-traded fund may not track the performance of the reference asset; and (5) a passively-managed exchange-traded fund may hold troubled securities. Investment in exchange-traded funds may involve duplication of management fees and certain other expenses, as the Fund or an underlying fund indirectly bears its proportionate share of any expenses paid by the exchange-traded funds in which it invests. Further, certain exchange-traded funds in which the Fund or an underlying fund may invest are leveraged, which may result in economic leverage, permitting the Fund or an underlying fund to gain exposure that is greater than would be the case in an unlevered instrument, and potentially resulting in greater volatility.

Exchange-Traded Notes Risk. Exchange-traded notes are subject to credit risk, counterparty risk, and the risk that the value of the exchange-traded note may drop due to a downgrade in the issuer's credit rating. The value of an exchange-traded note may also be influenced by time to maturity, level of supply and demand for the exchange-traded note, volatility and lack of liquidity in the underlying market, changes in the applicable interest rates, and economic, legal, political, or geographic events that affect the referenced underlying market or assets. An underlying fund will bear its proportionate share of any fees and expenses borne by an exchange-traded note in which it invests. For certain exchange-traded notes, there may be restrictions on an underlying fund’s right to redeem its investment, which is meant to be held until maturity.

Foreign Government Debt Risk. Investments in foreign government debt securities (sometimes referred to as sovereign debt securities) involve certain risks in addition to those relating to foreign securities or debt securities generally. The issuer of the debt or the governmental authorities that control the repayment of the debt may be unable or unwilling to repay principal or interest when due in accordance with the terms of such debt, and an underlying fund may have limited recourse in the event of a default against the defaulting government. Without the approval of debt holders, some governmental debtors have in the past been able to reschedule or restructure their debt payments or declare moratoria on payments.

Foreign Securities Risk. An underlying fund's foreign investments may be adversely affected by political and social instability, changes in economic or taxation policies, difficulty in enforcing obligations, decreased liquidity or increased volatility. Foreign investments also involve the risk of the possible seizure, nationalization or expropriation of the issuer or foreign deposits (in which an underlying fund could lose its entire investments in a certain market) and the possible adoption of foreign governmental restrictions such as exchange controls. Unless an underlying fund has hedged its foreign securities risk, foreign securities risk also involves the risk of negative foreign currency rate fluctuations, which may cause the value of securities denominated in such foreign currency (or other instruments through which an underlying fund has exposure to foreign currencies) to decline in value. Currency exchange rates may fluctuate significantly over short periods of time. Currency hedging strategies, if used, are not always successful.

Fund of Funds Risk. The Fund’s performance depends on that of the underlying funds in which it invests. Accordingly, the risks associated with an investment in the Fund include the risks associated with investments in the underlying funds. The Fund will indirectly pay a proportional share of the fees and expenses of the underlying funds in which it invests. There are risks that the Fund will vary from its target weightings (if any) in the underlying funds, that the underlying funds will not achieve their investment objectives, that the underlying funds’ performance may be lower than their represented asset classes, and that the Fund may withdraw its investments in an underlying fund at a disadvantageous time.

Management Risk. An underlying fund is actively managed and depends heavily on an underlying fund’s adviser’s judgment about markets, interest rates or the attractiveness, relative values, liquidity, or potential appreciation of particular investments made for an underlying fund’s portfolio. An underlying fund could experience losses if these judgments prove to be incorrect. Because an underlying fund’s investment process relies heavily on its asset allocation process, market movements that are counter to the portfolio managers’ expectations may have a significant adverse effect on the Fund’s net asset value. Additionally, legislative, regulatory, or tax developments may adversely affect management of an underlying fund and, therefore, the ability of the underlying fund to achieve its investment objective.

Market Risk. The market values of an underlying fund’s investments, and therefore the value of an underlying fund’s shares, will go up and down, sometimes rapidly or unpredictably. Market risk may affect a single issuer, industry or section of the economy, or it may affect the market as a whole. The value of an underlying fund’s investments may go up or down due to general market conditions which are not specifically related to the particular issuer, such as real or perceived adverse economic conditions, changes in the general outlook for revenues or corporate earnings, changes in interest or currency rates, regional or global instability, natural or environmental disasters, widespread disease or other public health issues, war, acts of terrorism or adverse investor sentiment generally. Individual stock prices tend to go up and down more dramatically than those of certain other types of investments, such as bonds. During a general downturn in the financial markets, multiple asset classes may decline in value. When markets perform well, there can be no assurance that specific investments held by an underlying fund will rise in value.

Money Market Fund Risk. Although an underlying money market fund seeks to preserve the value of the Fund’s investment at $1.00 per share, the Fund may lose money by investing in an underlying money market fund. The share price of money market funds can fall below the $1.00 share price. An underlying money market fund’s sponsor has no legal obligation to provide financial support to an underlying money market fund, and you should not rely on or expect that the sponsor will enter into support agreements or take other actions to provide financial support to an underlying money market fund or maintain an underlying money market fund’s $1.00 share price at any time. The credit quality of an underlying money market fund’s holdings can change rapidly in certain markets, and the default of a single holding could have an adverse impact on an underlying money market fund’s share price. An underlying money market fund’s share price can also be negatively affected during periods of high redemption pressures, illiquid markets, and/or significant market volatility. While an underlying money market fund’s Board may implement procedures to impose a fee upon the sale of the Fund’s shares or temporarily suspend the Fund’s ability to sell shares in the future if an underlying money market fund’s liquidity falls below required minimums because of market conditions or other factors, an underlying money market fund’s Board has not elected to do so at this time. Should an underlying money market fund’s Board elect to do so, such change would only become effective after shareholders were provided with specific advance notice of the change in an underlying money market fund’s policy and provided with the opportunity to redeem their shares in accordance with Rule 2a-7 before the policy change became effective.

Non-Diversification Risk. The Fund is non-diversified and can invest a greater portion of its assets in the obligations or securities of a small number of issuers or any single issuer than a diversified fund can. A change in the value of one or a few issuers’ securities will therefore affect the value of the Fund more than if it was a diversified fund.

Repurchase Agreement Risk. If the seller of a repurchase agreement defaults or otherwise does not fulfill its obligations, an underlying fund may incur delays and losses arising from selling the underlying securities, enforcing its rights, or declining collateral value.

Short Position Risk. Because an underlying fund’s potential loss on a short position arises from increases in the value of the asset sold short, the underlying fund will incur a loss on a short position, which is theoretically unlimited, if the price of the asset sold short increases from the short sale price. The counterparty to a short position or other market factors may prevent an underlying fund from closing out a short position at a desirable time or price and may reduce or eliminate any gain or result in a loss. In a rising market, an underlying fund’s short positions will cause the underlying fund to underperform the overall market and its peers that do not engage in shorting. If an underlying fund holds both long and short positions, and both positions decline simultaneously, the short positions will not provide any buffer (hedge) from declines in value of the underlying fund’s long positions. Certain types of short positions involve leverage, which may exaggerate any losses, potentially more than the actual cost of the investment, and will increase the volatility of an underlying fund’s returns.

Subsidiary Risk. By investing in the Subsidiary, an underlying fund is indirectly exposed to risks associated with the Subsidiary’s investments. The Subsidiary is not registered under the Investment Company Act of 1940, as amended (1940 Act), and, except as otherwise noted in this prospectus, is not subject to the investor protections of the 1940 Act. Changes in the laws of the United States and/or the Cayman Islands, under which an underlying fund and the Subsidiary, respectively, are organized, could result in the inability of an underlying fund and/or the Subsidiary to operate as described in this prospectus and the SAI, and could negatively affect an underlying fund and its shareholders.

U.S. Government Obligations Risk. Obligations of U.S. Government agencies and authorities receive varying levels of support and may not be backed by the full faith and credit of the U.S. Government, which could affect an underlying fund’s ability to recover should they default. No assurance can be given that the U.S. Government will provide financial support to its agencies and authorities if it is not obligated by law to do so.

Volatility Risk. Although an underlying fund’s investment strategy targets a specific volatility level, certain of an underlying fund’s investments may appreciate or decrease significantly in value over short periods of time. This may cause an underlying fund’s net asset value per share to experience significant increases or declines in value over short periods of time.

Yield Risk. An underlying fund’s yield will vary as the short-term securities in its portfolio mature or are sold and the proceeds are reinvested in other securities. When interest rates are very low, an underlying fund’s expenses could absorb all or a portion of an underlying fund’s income and yield. Additionally, inflation may outpace and diminish investment returns over time.

Risk Not Insured Depository Institution [Text]

rr_RiskNotInsuredDepositoryInstitution

An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart and performance table provide an indication of the risks of investing in the Fund. The bar chart shows changes in the performance of the Fund from year to year as of December 31. The performance table compares the Fund's performance to that of a broad-based securities market benchmark, two style-specific benchmarks and a peer group benchmark comprised of funds with investment objectives and strategies similar to those of the Fund (in that order).

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The Fund's past performance (before and after taxes) is not necessarily an indication of its future performance.

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The bar chart does not reflect sales loads. If it did, the annual total returns shown would be lower.

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2019)

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-advantaged arrangements, such as 401(k) plans, 529 college savings 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 an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-advantaged arrangements, such as 401(k) plans, 529 college savings plans or individual retirement accounts. After-tax returns are shown for Class A shares only and after-tax returns for other classes will vary.

Risk/Return:

rr_RiskReturnAbstract

Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.59%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.24%

^[2]

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

A contingent deferred sales charge may apply in some cases. See “Shareholder Account Information-Contingent Deferred Sales Charges (CDSCs).”

3 Years

rr_ExpenseExampleYear03

1,053

10 Years

rr_ExpenseExampleYear10

2,734

3 Years

rr_ExpenseExampleNoRedemptionYear03

1,053

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,734

2011

rr_AnnualReturn2011

6.18%

2013

rr_AnnualReturn2013

1.33%

2015

rr_AnnualReturn2015

(2.81%)

2017

rr_AnnualReturn2017

6.11%

2019

rr_AnnualReturn2019

9.64%

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Mar. 31, 2020

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

5.18%

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2013

1 Year

rr_AverageAnnualReturnYear01

3.61%

10 Years

rr_AverageAnnualReturnYear10

3.40%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.50%

Management Fees

rr_ManagementFeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.24%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.08%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

0.84%

1 Year

rr_ExpenseExampleYear01

$ 631

5 Years

rr_ExpenseExampleYear05

1,499

1 Year

rr_ExpenseExampleNoRedemptionYear01

631

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,499

1 Year

rr_AverageAnnualReturnYear01

3.48%

10 Years

rr_AverageAnnualReturnYear10

3.38%

^[3]

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.24%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.83%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.59%

3 Years

rr_ExpenseExampleYear03

760

10 Years

rr_ExpenseExampleYear10

3,067

3 Years

rr_ExpenseExampleNoRedemptionYear03

760

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 3,067

5 Years

rr_AverageAnnualReturnYear05

2.28%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 31, 2007

Risk/Return:

rr_RiskReturnAbstract

Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)

rr_MaximumDeferredSalesChargeOverOther

1.00%

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.59%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.24%

^[2]

1 Year

rr_ExpenseExampleYear01

$ 262

5 Years

rr_ExpenseExampleYear05

1,384

1 Year

rr_ExpenseExampleNoRedemptionYear01

162

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,384

1 Year

rr_AverageAnnualReturnYear01

7.78%

10 Years

rr_AverageAnnualReturnYear10

3.21%

^[3]

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.24%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.33%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

1.09%

3 Years

rr_ExpenseExampleYear03

608

10 Years

rr_ExpenseExampleYear10

2,570

3 Years

rr_ExpenseExampleNoRedemptionYear03

608

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,570

5 Years

rr_AverageAnnualReturnYear05

2.77%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 31, 2007

Risk/Return:

rr_RiskReturnAbstract

Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.59%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.24%

^[2]

1 Year

rr_ExpenseExampleYear01

$ 111

5 Years

rr_ExpenseExampleYear05

1,133

1 Year

rr_ExpenseExampleNoRedemptionYear01

111

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,133

1 Year

rr_AverageAnnualReturnYear01

9.22%

10 Years

rr_AverageAnnualReturnYear10

3.71%

^[3]

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.24%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.83%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

0.59%

3 Years

rr_ExpenseExampleYear03

455

10 Years

rr_ExpenseExampleYear10

2,046

3 Years

rr_ExpenseExampleNoRedemptionYear03

455

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 2,046

5 Years

rr_AverageAnnualReturnYear05

3.29%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 03, 2008

Risk/Return:

rr_RiskReturnAbstract

Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)

rr_MaximumDeferredSalesChargeOverOther

none

Distribution and/or Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.59%

Fee Waiver and/or Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.13%

^[2]

1 Year

rr_ExpenseExampleYear01

$ 60

5 Years

rr_ExpenseExampleYear05

827

1 Year

rr_ExpenseExampleNoRedemptionYear01

60

5 Years

rr_ExpenseExampleNoRedemptionYear05

827

1 Year

rr_AverageAnnualReturnYear01

9.78%

10 Years

rr_AverageAnnualReturnYear10

4.23%

Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Management Fees

rr_ManagementFeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.12%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.71%

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement

rr_NetExpensesOverAssets

0.59%

3 Years

rr_ExpenseExampleYear03

429

10 Years

rr_ExpenseExampleYear10

1,926

3 Years

rr_ExpenseExampleNoRedemptionYear03

429

10 Years

rr_ExpenseExampleNoRedemptionYear10

$ 1,926

5 Years

rr_AverageAnnualReturnYear05

3.26%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 24, 2012

Risk/Return:

rr_RiskReturnAbstract

5 Years

rr_AverageAnnualReturnYear05

0.35%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 31, 2007

Risk/Return:

rr_RiskReturnAbstract

5 Years

rr_AverageAnnualReturnYear05

0.89%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 31, 2007

Risk/Return:

rr_RiskReturnAbstract

5 Years

rr_AverageAnnualReturnYear05

11.70%

1 Year

rr_AverageAnnualReturnYear01

22.16%

10 Years

rr_AverageAnnualReturnYear10

9.82%

Risk/Return:

rr_RiskReturnAbstract

5 Years

rr_AverageAnnualReturnYear05

4.42%

1 Year

rr_AverageAnnualReturnYear01

13.50%

10 Years

rr_AverageAnnualReturnYear10

5.28%