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Lord Abbett Multi-Asset Growth Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Lord Abbett Multi-Asset Growth Fund
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund’s investment objective is to seek long-term capital appreciation and growth of 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 certain members of your family invest, or agree to invest in the future, at least $100,000 in the Lord Abbett Family of Funds. More information about these and other discounts is available from your financial professional and in “Sales Charge Reductions and Waivers” on page 421 of the prospectus, Appendix A to the prospectus, titled “Intermediary-Specific Sales Charge Reductions and Waivers,” and “Purchases, Redemptions, Pricing, and Payments to Dealers” on page 9-1 of Part II of the statement of additional information (“SAI”).
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)
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 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 the 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 32% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 32.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you and certain members of your family invest, or agree to invest in the future, at least $100,000 in the Lord Abbett Family of Funds.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 100,000
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This 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. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption If Shares Are Redeemed
Expense Example, No Redemption, By Year, Caption [Text] rr_ExpenseExampleNoRedemptionByYearCaption If Shares Are Not Redeemed
Strategy [Heading] rr_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Fund is a “fund-of-funds” that invests principally in affiliated mutual funds (the “underlying funds”) managed by Lord, Abbett & Co. LLC (“Lord Abbett”). Under normal conditions, through the underlying funds, the Fund indirectly invests primarily in U.S. equity securities and select fixed income securities and foreign (including emerging market) securities. The Fund tactically allocates its assets among these asset classes in response to market conditions or to seek to capitalize on investment opportunities. The Fund uses a “blend” strategy to gain investment exposure to both growth and value stocks, or to stocks with characteristics of both. Through the underlying funds, the Fund’s assets are allocated primarily to the following types of investments:


 

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Equity securities of large, mid-sized, and small companies. The underlying funds may invest in any security that represents equity ownership in a company. Equity securities usually include common stocks, preferred stocks, equity interests in trusts (including real estate investment trusts (“REITs”) and privately offered trusts), partnerships, joint ventures, limited liability companies and vehicles with similar legal structures, and other instruments with similar characteristics. The underlying funds consider equity securities to include warrants, rights offerings, convertible securities, and other investments that are convertible or exercisable into the equity securities described above.

 

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Growth companies that the underlying funds believe exhibit faster-than-average gains in earnings and have the potential to continue profit growth at a high level.

 

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Value companies that the underlying funds believe to be undervalued according to certain financial measurements of intrinsic worth or business prospects and to have the potential for capital appreciation.

 

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Fixed income securities of various types. Currently, the underlying funds invest in fixed income securities consisting principally of high-yield debt securities, investment grade debt securities, mortgage-related and other asset-backed securities, municipal bonds, U.S. Government securities, convertible securities, bank loans, inflation-linked investments, and cash equivalents. Certain of the underlying funds may invest up to 100% of their assets in fixed income securities that are below investment grade (commonly referred to as “high-yield” or “junk” bonds). High-yield debt securities are rated BB/Ba or lower by an independent rating agency, or are unrated but determined by Lord Abbett to be of comparable quality.

 

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Foreign securities (including emerging market securities and ADRs), which may be traded on a U.S. or non-U.S. securities exchange and may be denominated in non-U.S. currencies.


In addition to investing in the underlying funds, the Fund may invest directly in any type of derivative as part of its investment strategies or for risk management purposes. Currently, the Fund may invest in derivatives consisting principally of futures, forwards, options, and swaps. To the extent that the Fund invests directly in derivatives, the Fund intends to do so primarily for non-hedging purposes. When investing in this manner, the Fund may use a derivative investment, such as an index future, to adjust exposure to, or to change the weighting of its investments in, a particular asset class without increasing or decreasing the allocation among the underlying funds. The Fund may use derivatives to gain exposure to any asset class, whether or not represented by the underlying funds. The Fund may sell index futures short to reduce its exposure to a particular asset class represented by the index or to profit from an anticipated decline in the returns of the index. The Fund may invest in U.S. Treasury futures or sell U.S. Treasury futures short to adjust the Fund’s exposure to the direction of interest rates, or for other portfolio management reasons. In addition, the Fund may invest in total return swaps on indexes to adjust its exposure to the asset class represented by the indexes. The Fund may use total return swaps where futures contracts are not available or in other cases as determined by the Fund’s portfolio management team. The market value of the Fund’s directly held positions in derivatives, determined at the time of the most recent position established, will not exceed 50% of the Fund’s net assets. The Fund currently expects, however, that under normal conditions the market value of such instruments, determined at the time of the most recent position established, will not exceed 35% of the Fund’s net assets. These percentage limitations exclude Fund assets indirectly invested in derivatives through the underlying funds.


The Fund may sell or reallocate its investments among the underlying funds to secure gains, limit losses, redeploy assets, or satisfy redemption requests, among other reasons. The Fund seeks to remain fully invested in accordance with its investment objective. The Fund may, however, deviate entirely from the investment strategy described above for temporary defensive purposes. The Fund may miss certain investment opportunities if defensive strategies are used and thus may not achieve its investment objective.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

As with any investment in a mutual fund, investing in the Fund involves risk, including the risk that you may receive little or no return on your investment. When you redeem your shares, they may be worth more or less than what you paid for them, which means that you may lose a portion or all of the money you invested in the Fund. The principal risks of investing in the Fund also are the principal risks of investing in the underlying funds. These risks, which could adversely affect the Fund’s performance, include:


 
 

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Underlying Fund Risk: The assets of the Fund are invested principally in the underlying funds. As a result, the investment performance of the Fund is directly related to the investment performance of the underlying funds in which it invests. The Fund is exposed to the same risks as the underlying funds in direct proportion to the allocation of its assets among the underlying funds. The Fund typically will invest in a diversified portfolio of underlying funds; however, to the extent that the Fund invests a significant portion of its assets in a single underlying fund it may be more susceptible to risks associated with that fund and its investments. It is possible that the holdings of underlying funds may contain securities of the same issuers, thereby increasing the Fund’s exposure to such issuers. It also is possible that one underlying fund may be selling a particular security when another is buying it, producing little or no change in exposure but generating transaction costs and/or resulting in realization of gains with no economic benefit. There can be no assurance that the investment objective of any underlying fund will be achieved. In addition, the Fund’s shareholders will indirectly bear their proportionate share of the underlying funds’ fees and expenses, as well as their proportionate share of the Fund’s fees and expenses.
 

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Affiliated Underlying Fund Risk: The Fund invests principally in underlying funds advised by Lord Abbett, which presents certain conflicts of interest. Lord Abbett is subject to conflicts of interest in allocating portfolio assets among the various underlying funds because the fees payable to Lord Abbett by underlying funds differ. Lord Abbett will have an incentive to select underlying funds that will result in the greatest net management fee revenue to Lord Abbett and its affiliates, even if that results in increased expenses for the Fund. In addition, the Fund’s investments in affiliated underlying funds may be beneficial to Lord Abbett in managing the underlying funds, by helping the underlying funds achieve economies of scale or by enhancing cash flows to the underlying funds. In certain circumstances, Lord Abbett would have an incentive to delay or decide against the sale of interests held by the Fund in the underlying funds and may implement Fund changes in a manner intended to minimize the disruptive effects and added costs of those changes to the underlying funds. If the Fund invests in an underlying fund with higher expenses, the Fund’s performance would be lower than if the Fund had invested in an underlying fund with comparable performance but lower expenses.

 

 

  

 
 

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New Underlying Fund Risk: The Fund may invest in underlying funds that are recently organized. There can be no assurance that a new underlying fund will reach or maintain a sufficient asset size to effectively implement its investment strategy. In addition, a new underlying fund’s gross expense ratio may fluctuate during its initial operating period because of the fund’s relatively smaller asset size and, until the fund achieves sufficient scale, the Fund may experience proportionally higher expenses than it would experience if it invested in a fund with a larger asset base.
 

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Portfolio Management Risk: If the strategies used and investments selected by the Fund’s portfolio management team and/or the teams of the underlying funds fail to produce the intended results, the Fund and/or the underlying funds may not achieve their respective objectives. There can be no assurance that the allocation of Fund assets among the underlying funds or the Fund’s use of derivatives will maximize returns, minimize risks, or be appropriate for all investors. As a result, the Fund may suffer losses or underperform other funds with the same investment objective or strategies, even in a favorable market.
 

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Market Risk: The market values of securities will fluctuate, sometimes sharply and unpredictably, based on overall economic conditions, governmental actions or intervention, political developments and other factors. Prices of equity securities tend to rise and fall more dramatically than those of debt securities.
 

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Equity Securities Risk: Equity securities, as well as equity-like securities such as convertible debt securities, may experience significant volatility. Such securities may fall sharply in response to adverse events affecting overall markets, a particular industry or sector, or an individual company’s financial condition.
 

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Industry and Sector Risk: Although the Fund does not employ an industry or sector focus, its exposure to specific industries or sectors will increase from time to time based on the portfolio management team’s perception of investment opportunities. If an underlying fund overweights a single industry or sector relative to its benchmark index, the underlying fund will face an increased risk that the value of its portfolio will decrease because of events disproportionately affecting that industry or sector. Furthermore, investments in particular industries or sectors may be more volatile than the broader market as a whole.

 

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Large Company Risk: As compared to smaller successful companies, larger, more established companies may be less able to respond quickly to certain market developments and may have slower rates of growth. Large companies also may fall out of favor relative to smaller companies in certain market cycles, causing the Fund to incur losses or underperform.

 

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Mid-Sized and Small Company Risk: Investments in mid-sized and small companies may involve greater risks than investments in larger, more established companies. As compared to larger companies, mid-sized and small companies may have limited management experience or depth, limited ability to generate or borrow capital needed for growth, and limited products or services, or operate in less established markets. Accordingly, mid-sized and small company securities tend to be more sensitive to changing economic, market, and industry conditions and tend to be more volatile and less liquid than equity securities of larger companies, especially over the short term. Mid-sized and small companies also may fall out of favor relative to larger companies in certain market cycles, causing the Fund to incur losses or underperform. The shares of mid-sized and small companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these securities and the ability to sell these securities in the future.

 

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Blend Style Risk: Growth stocks tend to be more volatile than slower-growing value stocks. Growth stocks typically trade at higher multiples of current earnings than other stocks. Growth stocks often are more sensitive to market fluctuations than other securities because their market prices are highly sensitive to future earnings expectations. At times when it appears that these expectations may not be met, growth stocks’ prices typically fall. The prices of value stocks may lag the stock market for long periods of time if the market fails to recognize the company’s intrinsic worth. Value investing also is subject to the risk that a company judged to be undervalued may actually be appropriately priced or even overpriced. A portfolio that combines growth and value styles may diversify these risks and lower its volatility, but there is no assurance this strategy will achieve that result.

 

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Fixed Income Securities Risk: The Fund is subject to the general risks and considerations associated with investing in debt securities, including the risk that issuers will fail to make timely payments of principal or interest or default altogether. Typically, shorter-term bonds are less volatile than longer-term bonds; however, longer-term bonds typically offer higher yields and more stable interest income than shorter-term bond investments. Lower-rated securities in which the Fund may invest may be more volatile and may decline more in price in response to negative issuer developments or general economic news than higher rated securities. In addition, as interest rates rise, the Fund’s investments typically will lose value.


 

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High-Yield Securities Risk: High-yield securities (commonly referred to as “junk” bonds) typically pay a higher yield than investment grade securities, but may have greater price fluctuations and have a higher risk of default than investment grade securities. The market for below investment grade securities may be less liquid due to such factors as interest rate sensitivity, negative perceptions of the junk bond markets generally, and less secondary market liquidity. This may make such securities more difficult to sell at an acceptable price, especially during periods of financial distress, increased market volatility, or significant market decline.

 

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Senior Loan Risk: Investments in floating or adjustable rate senior loans are subject to increased credit and liquidity risks. Senior loan prices also may be adversely affected by supply-demand imbalances caused by conditions in the senior loan market or related markets. The Fund may invest primarily in senior loans that are rated below investment grade or, if unrated, deemed by Lord Abbett to be the equivalent of below investment grade securities. Below investment grade senior loans, like high-yield debt securities, or junk bonds, usually are more credit sensitive than interest rate sensitive, although the value of these instruments may be affected by interest rate swings in the overall fixed income market. Senior loans may be subject to structural subordination and, although the loans may be senior to equity and other debt securities in the borrower’s capital structure, the loans may be subordinated to other obligations of the borrower or its subsidiaries.

 

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Government Securities Risk: The Fund invests in securities issued or guaranteed by the U.S. Government or its agencies and instrumentalities (such as the Government National Mortgage Association (“Ginnie Mae”), the Federal National Mortgage Association (“Fannie Mae”), or the Federal Home Loan Mortgage Corporation (“Freddie Mac”)). Unlike Ginnie Mae securities, securities issued or guaranteed by U.S. Government-related organizations such as Fannie Mae and Freddie Mac are not backed by the full faith and credit of the U.S. Government and no assurance can be given that the U.S. Government would provide financial support.

 

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Municipal Securities Risk: Municipal securities are subject to the same risks affecting fixed income securities in general. In addition, the prices of municipal securities may be adversely affected by legislative or political changes, tax rulings, judicial action, changes in market and economic conditions, and the fiscal condition of the municipal issuer, including an insolvent municipality filing for bankruptcy. The Fund may be more sensitive to these events and conditions if it invests a substantial portion of its assets in the municipal securities of similar projects (such as those relating to education, health care, housing, transportation, and utilities), in particular types of municipal securities (such as general obligation bonds, private activity bonds, and special tax bonds) or in the securities of issuers located within a single state, municipality, territory (such as Puerto Rico), or geographic area. The market for municipal securities generally is less liquid than other securities markets, which may make it more difficult for the Fund to sell its municipal securities. Nongovernmental users of facilities financed by tax-exempt revenue bonds (e.g., companies in the electric utility and health care industries) may have difficulty making payments on their obligations in the event of an economic downturn. This would negatively affect the valuation of municipal securities issued by such facilities.

 

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Mortgage-Related and Other Asset-Backed Securities Risk: Mortgage-related securities, including commercial mortgage-backed securities and other privately issued mortgage-related securities, and other asset-backed securities may be particularly sensitive to changes in economic conditions, including delinquencies and/or defaults. The prices of mortgage- and asset-backed securities, depending on their structure and the rate of payments, can be volatile. They are subject to prepayment risk (higher than expected prepayment rates of mortgage obligations due to a fall in market interest rates) and extension risk (lower than expected prepayment rates of mortgage obligations due to a rise in market interest rates). These risks increase the Fund’s overall interest rate risk. Some mortgage-related securities receive government or private support, but there is no assurance that such support will remain in place.

 

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Inflation-Linked Investments Risk: Unlike traditional fixed income securities, the principal and interest payments of inflation-linked investments are adjusted periodically based on the inflation rate. The value of the Fund’s inflation-linked investments may be vulnerable to changes in expectations of inflation or interest rates and there is no guarantee that the Fund’s use of these instruments will be successful.

 

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Inverse Floaters Risk: The Fund, through the underlying funds, may invest in inverse floaters. An inverse floater is a type of municipal bond derivative instrument with a floating or variable interest rate that moves in the opposite direction of the interest rate on another security, normally the floating rate note. The value and income of an inverse floater generally is more volatile than the value and income of a fixed rate municipal bond. The value and income of an inverse floater generally fall when interest rates rise. Inverse floaters tend to underperform the market for fixed rate municipal bonds in a rising long-term interest rate environment, but may outperform that market when long-term interest rates decline. Inverse floaters have varying degrees of liquidity, and the market for these securities is relatively volatile. An underlying fund’s net cash investment in inverse floaters is significantly less than the value of the underlying municipal bonds. This creates leverage, which increases as the value of the inverse floaters becomes greater in proportion to the value of the underlying municipal bonds.


 

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Credit Risk: Debt securities are subject to the risk that the issuer or guarantor of a security may not make interest and principal payments as they become due or may default altogether. In addition, if the market perceives a deterioration in the creditworthiness of an issuer, the value and liquidity of bonds issued by that issuer may decline. To the extent that the Fund holds below investment grade securities, these risks may be heightened. Insured debt securities have the credit risk of the insurer in addition to the credit risk of the underlying investment being insured.

 

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Interest Rate Risk: As interest rates rise, prices of bonds (including tax-exempt bonds) generally fall, typically causing the Fund’s investments to lose value. Additionally, rising interest rates or lack of market participants may lead to decreased liquidity in the fixed income markets. Interest rate changes typically have a greater effect on the price of longer-term bonds, including inverse floaters, than on the price of shorter-term bonds. A wide variety of market factors can cause interest rates to rise, including central bank monetary policy, rising inflation, and changes in general economic conditions. The Fund will be exposed to heightened interest rate risk as interest rates rise from historically low levels.

 

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Foreign and Emerging Market Company Risk: Investments in foreign companies and in U.S. companies with economic ties to foreign markets generally involve special risks that can increase the likelihood that the Fund will lose money. For example, as compared with companies organized and operated in the U.S., these companies may be more vulnerable to economic, political, and social instability and subject to less government supervision, lack of transparency, inadequate regulatory and accounting standards, and foreign taxes. In addition, the securities of foreign companies also may be subject to inadequate exchange control regulations, the imposition of economic sanctions or other government restrictions, higher transaction and other costs, reduced liquidity, and delays in settlement to the extent they are traded on non-U.S. exchanges or markets. Foreign company securities also include ADRs. ADRs may be less liquid than the underlying shares in their primary trading market. Emerging market securities generally are more volatile than other foreign securities, and are subject to greater liquidity, regulatory, and political risks. Investments in emerging markets may be considered speculative and generally are riskier than investments in more developed markets because such markets tend to develop unevenly and may never fully develop. Emerging markets are more likely to experience hyperinflation and currency devaluations. Securities of emerging market companies may have far lower trading volumes and less liquidity than securities of issuers in developed markets. Companies with economic ties to emerging markets may be susceptible to the same risks as companies organized in emerging markets.


 

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Foreign Currency Risk: Certain of the underlying funds may invest in securities denominated in foreign currencies, which are subject to the risk that those currencies will decline in value relative to the U.S. dollar, or, in the case of hedged positions, that the U.S. dollar will decline in value relative to the currency being hedged. Foreign currency exchange rates may fluctuate significantly over short periods of time.

 

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Sovereign Debt Risk: Sovereign debt securities are subject to the risk that the relevant sovereign government or governmental entity may delay or refuse to pay interest or repay principal on its debt, due, for example, to cash flow problems, insufficient foreign currency reserves, political considerations, the size of its debt relative to the economy, or the failure to put in place economic reforms required by the International Monetary Fund or other multilateral agencies. If a sovereign government or governmental entity defaults, it may ask for maturity extensions, interest rate reductions, or additional loans. There is no legal process for collecting sovereign debt that is not repaid nor are there bankruptcy proceedings through which all or part of the unpaid sovereign debt may be collected.

 

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Convertible Securities Risk: Convertible securities are subject to the risks affecting both equity and fixed income securities, including market, credit, liquidity, and interest rate risk. Convertible securities tend to be more volatile than other fixed income securities, and the markets for convertible securities may be less liquid than markets for common stocks or bonds. To the extent that an underlying fund invests in convertible securities, and the convertible security’s investment value is greater than its conversion value, its price will be likely to increase when interest rates fall and decrease when interest rates rise. If the conversion value exceeds the investment value, the price of the convertible security will tend to fluctuate directly with the price of the underlying equity security. A significant portion of convertible securities have below investment grade credit ratings and are subject to increased credit and liquidity risks.

 

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Derivatives Risk: The risks associated with derivatives may be different from and greater than the risks associated with directly investing in securities and other investments. Derivatives may increase the Fund’s volatility and reduce its returns. The risks associated with derivatives include, among other things, the following:


 

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The risk that the value of a derivative may not correlate with the value of the underlying asset, rate, or index in the manner anticipated by the portfolio management team and may be more sensitive to changes in economic or market conditions than anticipated.

 

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Derivatives may be difficult to value, especially under stressed or unforeseen market conditions.


 

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The risk that the counterparty may fail to fulfill its contractual obligations under the derivative contract. Central clearing of derivatives is intended to decrease counterparty risk but does not eliminate it.

 

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The Fund may be required to segregate permissible liquid assets to cover its obligations under these transactions and may have to liquidate positions before it is desirable to do so to fulfill its segregation requirements.

 

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The risk that there will not be a liquid secondary trading market for the derivative, or that the Fund will otherwise be unable to sell or otherwise close a derivatives position when desired, exposing the Fund to additional losses.

 

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Because derivatives generally involve a small initial investment relative to the risk assumed (known as leverage), derivatives can magnify the Fund’s losses and increase its volatility.

 

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The Fund’s use of derivatives may affect the amount, timing, and character of distributions, and may cause the Fund to realize more short-term capital gain and ordinary income than if the Fund did not use derivatives.


     

Derivatives may not perform as expected and the Fund may not realize the intended benefits. Whether the Fund’s use of derivatives is successful will depend on, among other things, the portfolio managers’ ability to correctly forecast market movements and other factors. If the portfolio managers incorrectly forecast these and other factors, the Fund’s performance could suffer. In addition, given their complexity, derivatives are subject to the risk that improper or misunderstood documentation may expose the Fund to losses.

 

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Liquidity/Redemption Risk: The Fund may lose money when selling securities at inopportune times to fulfill shareholder redemption requests. The risk of loss may increase depending on the size and frequency of redemption requests, whether the redemption requests occur in times of overall market turmoil or declining prices, and whether the securities the Fund intends to sell have decreased in value or are illiquid. Liquidity risk may be magnified in a rising interest rate environment or other circumstances where investor redemptions from fixed income mutual funds may be higher than normal, causing increased supply in the market due to selling activity.


An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. For more information on the principal risks of the Fund, please see the “More Information About the Funds – Principal Risks” section in the prospectus.
Risk Lose Money [Text] rr_RiskLoseMoney As with any investment in a mutual fund, investing in the Fund involves risk, including the risk that you may receive little or no return on your investment. When you redeem your shares, they may be worth more or less than what you paid for them, which means that you may lose a portion or all of the money you invested in the Fund.
RIsk Not Insured [Text] rr_RiskNotInsured An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading PERFORMANCE
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund’s returns. Each assumes reinvestment of dividends and distributions. The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. No performance is shown for Class P shares because the Fund has no Class P shares outstanding.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund’s returns.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 888-522-2388
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.lordabbett.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 Bar Chart (per calendar year) — Class A Shares
Bar Chart Narrative [Text Block] rr_BarChartNarrativeTextBlock

The bar chart shows changes in the performance of the Fund’s Class A shares from calendar year to calendar year. This chart does not reflect the sales charge applicable to Class A shares. If the sales charge were reflected, returns would be lower. Performance for the Fund’s other share classes will vary due to the different expenses each class bears. Updated performance information is available at www.lordabbett.com or by calling 888-522-2388.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads This chart does not reflect the sales charge applicable to Class A shares. If the sales charge were reflected, returns would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

 

 

 

Best Quarter 2nd Q ’09 +18.83%

  

Worst Quarter 3rd Q ’11 -16.18%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 18.83%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Sep. 30, 2011
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (16.18%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2018)
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads The Fund’s average annual total returns include applicable sales charges.
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 The after-tax returns of Class A shares included in the table below 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 The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-advantaged arrangements such as 401(k) plans or Individual Retirement Accounts (“IRAs”).
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns for other share classes are not shown in the table and will vary from those shown for Class A shares.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher In some cases, the return after taxes on distributions and sale of Fund shares may exceed the return before taxes due to a tax benefit resulting from realized losses on a sale of Fund shares at the end of the period that is used to offset other gains.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

The table below shows how the Fund’s average annual total returns compare to the returns of securities market indices with investment characteristics similar to those of the Fund. The Fund’s average annual total returns include applicable sales charges.


The after-tax returns of Class A shares included in the table below are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. In some cases, the return after taxes on distributions and sale of Fund shares may exceed the return before taxes due to a tax benefit resulting from realized losses on a sale of Fund shares at the end of the period that is used to offset other gains. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-advantaged arrangements such as 401(k) plans or Individual Retirement Accounts (“IRAs”). After-tax returns for other share classes are not shown in the table and will vary from those shown for Class A shares.
Lord Abbett Multi-Asset Growth Fund | Russell 1000® Index (reflects no deduction for fees, expenses, or taxes) 6/30/2015  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (4.78%)
5 Years rr_AverageAnnualReturnYear05 8.21%
10 Years rr_AverageAnnualReturnYear10 13.28%
Life of Class rr_AverageAnnualReturnSinceInception 7.50%
Inception Date for Performance rr_AverageAnnualReturnInceptionDate Jun. 30, 2015
Lord Abbett Multi-Asset Growth Fund | Russell 1000® Index (reflects no deduction for fees, expenses, or taxes) 4/4/2017  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (4.78%)
5 Years rr_AverageAnnualReturnYear05 8.21%
10 Years rr_AverageAnnualReturnYear10 13.28%
Life of Class rr_AverageAnnualReturnSinceInception 5.30%
Inception Date for Performance rr_AverageAnnualReturnInceptionDate Apr. 04, 2017
Lord Abbett Multi-Asset Growth Fund | 50% Russell 1000® Index/30% ICE BofAML U.S. High Yield Constrained Index/15% MSCI EAFE® Index with Gross Dividends/5% Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes) 6/30/2015  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (4.95%)
5 Years rr_AverageAnnualReturnYear05 5.62%
10 Years rr_AverageAnnualReturnYear10 11.31%
Life of Class rr_AverageAnnualReturnSinceInception 5.33%
Inception Date for Performance rr_AverageAnnualReturnInceptionDate Jun. 30, 2015
Lord Abbett Multi-Asset Growth Fund | 50% Russell 1000® Index/30% ICE BofAML U.S. High Yield Constrained Index/15% MSCI EAFE® Index with Gross Dividends/5% Bloomberg Barclays U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes) 4/4/2017  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (4.95%)
5 Years rr_AverageAnnualReturnYear05 5.62%
10 Years rr_AverageAnnualReturnYear10 11.31%
Life of Class rr_AverageAnnualReturnSinceInception 3.37%
Inception Date for Performance rr_AverageAnnualReturnInceptionDate Apr. 04, 2017
Lord Abbett Multi-Asset Growth Fund | Morningstar Allocation 70-85% Equity Category Average (reflects no deduction for sales charges or taxes) 6/30/2015  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (8.17%)
5 Years rr_AverageAnnualReturnYear05 3.45%
10 Years rr_AverageAnnualReturnYear10 9.01%
Life of Class rr_AverageAnnualReturnSinceInception 2.85%
Inception Date for Performance rr_AverageAnnualReturnInceptionDate Jun. 30, 2015
Lord Abbett Multi-Asset Growth Fund | Morningstar Allocation 70-85% Equity Category Average (reflects no deduction for sales charges or taxes) 4/4/2017  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (8.17%)
5 Years rr_AverageAnnualReturnYear05 3.45%
10 Years rr_AverageAnnualReturnYear10 9.01%
Life of Class rr_AverageAnnualReturnSinceInception 1.19%
Inception Date for Performance rr_AverageAnnualReturnInceptionDate Apr. 04, 2017
Lord Abbett Multi-Asset Growth Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.25% [1]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1],[2]
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.18%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.74%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.27%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 351
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 619
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 906
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,724
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 351
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 619
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 906
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,724
Annual Return 2009 rr_AnnualReturn2009 34.86%
Annual Return 2010 rr_AnnualReturn2010 14.23%
Annual Return 2011 rr_AnnualReturn2011 (4.73%)
Annual Return 2012 rr_AnnualReturn2012 15.47%
Annual Return 2013 rr_AnnualReturn2013 20.61%
Annual Return 2014 rr_AnnualReturn2014 7.43%
Annual Return 2015 rr_AnnualReturn2015 (5.02%)
Annual Return 2016 rr_AnnualReturn2016 12.54%
Annual Return 2017 rr_AnnualReturn2017 11.51%
Annual Return 2018 rr_AnnualReturn2018 (10.15%)
1 Year rr_AverageAnnualReturnYear01 (12.17%)
5 Years rr_AverageAnnualReturnYear05 2.38%
10 Years rr_AverageAnnualReturnYear10 8.68%
Lord Abbett Multi-Asset Growth Fund | Class A | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (14.23%)
5 Years rr_AverageAnnualReturnYear05 0.20%
10 Years rr_AverageAnnualReturnYear10 6.96%
Lord Abbett Multi-Asset Growth Fund | Class A | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (6.25%)
5 Years rr_AverageAnnualReturnYear05 1.43%
10 Years rr_AverageAnnualReturnYear10 6.68%
Lord Abbett Multi-Asset Growth Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [1]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [1],[3]
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses rr_OtherExpensesOverAssets 0.18%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.74%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 2.02%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 305
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 634
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,088
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 2,348
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 205
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 634
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 1,088
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 2,348
1 Year rr_AverageAnnualReturnYear01 (11.66%)
5 Years rr_AverageAnnualReturnYear05 2.09%
10 Years rr_AverageAnnualReturnYear10 8.16%
Lord Abbett Multi-Asset Growth Fund | Class F  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [1]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.10%
Other Expenses rr_OtherExpensesOverAssets 0.18%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.74%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.12%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 114
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 356
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 617
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,363
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 114
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 356
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 617
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,363
1 Year rr_AverageAnnualReturnYear01 (9.96%)
5 Years rr_AverageAnnualReturnYear05 3.01%
10 Years rr_AverageAnnualReturnYear10 9.12%
Lord Abbett Multi-Asset Growth Fund | Class F3  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [1]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.09%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.74%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.93%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 95
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 296
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 515
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,143
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 95
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 296
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 515
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,143
1 Year rr_AverageAnnualReturnYear01 (9.84%)
Life of Class rr_AverageAnnualReturnSinceInception (1.25%)
Inception Date for Performance rr_AverageAnnualReturnInceptionDate Apr. 04, 2017
Lord Abbett Multi-Asset Growth Fund | Class I  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [1]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.18%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.74%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.02%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 104
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 325
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 563
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,248
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 104
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 325
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 563
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,248
1 Year rr_AverageAnnualReturnYear01 (9.93%)
5 Years rr_AverageAnnualReturnYear05 3.11%
10 Years rr_AverageAnnualReturnYear10 9.23%
Lord Abbett Multi-Asset Growth Fund | Class P  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [1]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.45%
Other Expenses rr_OtherExpensesOverAssets 0.18%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.74%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.47%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 150
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 465
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 803
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,757
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 150
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 465
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 803
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,757
Lord Abbett Multi-Asset Growth Fund | Class R2  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [1]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.60%
Other Expenses rr_OtherExpensesOverAssets 0.18%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.74%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.62%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 165
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 511
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 881
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,922
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 165
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 511
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 881
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,922
1 Year rr_AverageAnnualReturnYear01 (10.47%)
5 Years rr_AverageAnnualReturnYear05 2.49%
10 Years rr_AverageAnnualReturnYear10 8.65%
Lord Abbett Multi-Asset Growth Fund | Class R3  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [1]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses rr_OtherExpensesOverAssets 0.18%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.74%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.52%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 155
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 480
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 829
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,813
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 155
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 480
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 829
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,813
1 Year rr_AverageAnnualReturnYear01 (10.34%)
5 Years rr_AverageAnnualReturnYear05 2.62%
10 Years rr_AverageAnnualReturnYear10 8.70%
Lord Abbett Multi-Asset Growth Fund | Class R4  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [1]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.18%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.74%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.27%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 129
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 403
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 697
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,534
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 129
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 403
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 697
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,534
1 Year rr_AverageAnnualReturnYear01 (10.14%)
Life of Class rr_AverageAnnualReturnSinceInception 1.51%
Inception Date for Performance rr_AverageAnnualReturnInceptionDate Jun. 30, 2015
Lord Abbett Multi-Asset Growth Fund | Class R5  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [1]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.18%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.74%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.02%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 104
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 325
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 563
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,248
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 104
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 325
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 563
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,248
1 Year rr_AverageAnnualReturnYear01 (9.98%)
Life of Class rr_AverageAnnualReturnSinceInception 1.76%
Inception Date for Performance rr_AverageAnnualReturnInceptionDate Jun. 30, 2015
Lord Abbett Multi-Asset Growth Fund | Class R6  
Risk/Return: rr_RiskReturnAbstract  
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none [1]
Maximum Deferred Sales Charge (Load) (as a percentage of offering price or redemption proceeds, whichever is lower) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees rr_ManagementFeesOverAssets 0.10%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.09%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.74%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.93%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 95
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 296
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 515
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,143
Expense Example, No Redemption, 1 Year rr_ExpenseExampleNoRedemptionYear01 95
Expense Example, No Redemption, 3 Years rr_ExpenseExampleNoRedemptionYear03 296
Expense Example, No Redemption, 5 Years rr_ExpenseExampleNoRedemptionYear05 515
Expense Example, No Redemption, 10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,143
1 Year rr_AverageAnnualReturnYear01 (9.89%)
Life of Class rr_AverageAnnualReturnSinceInception 1.82%
Inception Date for Performance rr_AverageAnnualReturnInceptionDate Jun. 30, 2015
[1] A shareholder transacting in share classes without a front-end sales charge may be required to pay a commission to its financial intermediary. Please contact your financial intermediary for more information about whether such a commission may apply to your transaction.
[2] A contingent deferred sales charge ("CDSC") of 1.00% may be assessed on certain Class A shares purchased or acquired without a sales charge if they are redeemed before the first day of the month of the one-year anniversary of the purchase.
[3] A CDSC of 1.00% may be assessed on Class C shares if they are redeemed before the first anniversary of their purchase.