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Target 2035 Allocation Portfolio

Risk/Return:

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Risk/Return [Heading]

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Target 2035 Allocation Portfolio – Class B and K Shares

Objective [Heading]

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Investment Objective:

Objective, Primary [Text Block]

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Seeks the highest total return over time consistent with its asset mix. Total return includes capital growth and income.

Expense [Heading]

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FEES AND EXPENSES OF THE PORTFOLIO

Expense Narrative [Text Block]

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The following table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the portfolio. The table below does not reflect any fees and expenses associated with variable life insurance contracts and variable annuity certificates and contracts (“Contracts”), which would increase overall fees and expenses. See the Contract prospectus for a description of those fees and expenses.

Shareholder Fees Caption [Text]

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Shareholder Fees(fees paid directly from your investment)

Operating Expenses Caption [Text]

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Annual Portfolio Operating Expenses(expenses that you pay each year as a percentage of thevalue of your investment)

Portfolio Turnover [Heading]

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PORTFOLIO TURNOVER

Portfolio Turnover [Text Block]

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The Portfolio will not incur transaction costs, such as commissions, when it buys and sells shares of the Underlying Portfolios (or “turns over” its portfolio), but it could incur transaction costs if it were to buy and sell other types of securities directly. If the Portfolio were to buy and sell other types of securities directly, a higher portfolio turnover rate could indicate higher transaction costs. Such costs, if incurred, would not be reflected in annual fund operating expenses or in the example, and would affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 20% of the average value of the Portfolio.

Portfolio Turnover, Rate

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20.00%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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This example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other portfolios. The example assumes that you invest $10,000 in the Portfolio for the time periods indicated, that your investment has a 5% return each year, and that the Portfolio’s operating expenses (and expenses of other investment companies in which it invests) remain the same. This example does not reflect any Contract-related fees and expenses, including redemption fees (if any) at the Contract level. If such fees and expenses were reflected, the total expenses would be higher. Although your actual costs may be higher or lower, based on these assumptions, whether you redeem or hold your shares, your costs would be:

Strategy [Heading]

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INVESTMENTS, RISKS AND PERFORMANCE Principal Investment Strategies of the Portfolio

Strategy Narrative [Text Block]

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The Portfolio seeks to achieve its objective by investing in other mutual funds (the “Underlying Portfolios”) managed by Equitable Investment Management Group, LLC (“EIM” or “Adviser”) and sub-advised by one or more sub-advisers (“Sub-Adviser”), which represent a variety of asset classes and investment styles. The Portfolio is managed to target 2035 as the specific year of planned retirement (the “retirement year” or “target year”). The retirement year also assumes that an investor retires at age 65; however, the Portfolio should not be selected solely on the basis of an investor’s age or the target year. The Portfolio’s asset mix will become more conservative each year until reaching the year approximately 10 years after the retirement year at which time it is intended that the asset mix will become relatively stable. The Portfolio balances the need for appreciation with the need for income as retirement approaches, and focuses on supporting an income stream over a long-term retirement withdrawal horizon. The Portfolio is not designed for a lump sum redemption at the target year and does not guarantee a particular level of income. The Portfolio maintains significant allocations to equities both prior to and after the target year and is generally expected to reach its most conservative allocation 10 years after the target year. The asset classes in which the Portfolio may invest generally are divided into domestic equity securities (such as the common stock of U.S. companies of any size), international equity securities (such as the common stock of foreign companies of any size, including those located in developed and emerging markets) and fixed income investments (such as debt securities issued by the U.S. Government and its agencies and instrumentalities, mortgage- and asset-backed securities, domestic and foreign investment grade and high yield or “junk” bonds, and short-term investments such asmoney market instruments). The Portfolio is not limited with respect to the maturity, duration or credit quality of the fixed income securities in which it invests. The Underlying Portfolios in which the Portfolio may invest may also invest in fixed income securities of any maturity, duration or credit quality. The longer a security’s duration, the more sensitive it will be to changes in interest rates, which may increase the volatility of the security’s value and may lead to losses. The Portfolio may hold cash or invest in short-term paper and other short-term investments (instead of allocating investments to an Underlying Portfolio) as deemed appropriate by the Adviser. The following chart shows the Portfolio’s target allocation for the various asset classes (as represented by the holdings of the Underlying Portfolios in which the Portfolio invests) as of the date of this Prospectus. The Portfolio may invest in Underlying Portfolios that employ derivatives for a variety of purposes, including to reduce risk, to seek enhanced returns from certain asset classes, and to leverage exposure to certain asset classes.

Target 2035 Allocation Portfolio Asset Allocation Targets



Approximate Number of Years Before/After Retirement Year		14 Years Before				10 Years Before				5 Years Before				Retirement				5 Years After				10 Years After
Asset Class
Domestic Equity			53%				50%				42%				35%				30%				15%
International Equity			22%				20%				18%				15%				10%				5%
Fixed Income			25%				30%				40%				50%				60%				80%

The following chart shows the Portfolio’s glide path and illustrates how the asset mix of the Portfolio will change over time. In general, the asset mix of the Portfolio will gradually shift from one comprised largely of Underlying Portfolios that emphasize investments in stocks to one that increasingly favors Underlying Portfolios that emphasize investments in bonds and money market instruments. The asset mix of the Portfolio will become more conservative each year until reaching the year approximately 10 years after the retirement year, at which time the asset mix will become relatively stable. The Underlying Portfolios can invest in companies of any size, and can use derivatives, including futures contracts, to achieve their respective investment objectives.

As of December 31, 2020, the Portfolio’s asset mix was allocated approximately 50.2% to domestic equity, 27.1% to international equity, and 22.7% to fixed income. The Portfolio’s Annual and Semi-Annual Reports to shareholders set forth the actual allocation to the Underlying Portfolios as of the date of the report.

The Adviser establishes the asset mix of the Portfolio and selects the specific Underlying Portfolios in which to invest using its proprietary investment process, which is based on fundamental research regarding the investment characteristics of each asset class and the Underlying Portfolios (such as risk, volatility, and the potential for growth and income), as well as its outlook for the economy and financial markets.

The Adviser may change the asset allocation targets and may add new Underlying Portfolios or replace or eliminate existing Underlying Portfolios without notice or shareholder approval. The Adviser may sell the Portfolio’s holdings for a variety of reasons, including to invest in an Underlying Portfolio believed to offer superior investment opportunities.

The Adviser will permit the relative weightings of the Portfolio’s asset classes to vary in response to the markets, ordinarily by not more than plus/minus 15%. Beyond those ranges, the Adviser generally will use cash flows, and periodically will rebalance the Portfolio’s investments, to keep the Portfolio within its asset allocation targets. However, there may be occasions when those ranges will expand to 20% due to a variety of factors, including appreciation or depreciation of one or more of the asset classes. The Portfolio will purchase Class K shares of the Underlying Portfolios, which are not subject to distribution or service (Rule

12b-1)

fees.

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The Principal Risks of Investing in the Portfolio

Risk Narrative [Text Block]

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An investment in the Portfolio is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The value of your investment may fall, sometimes sharply, and you could lose money by investing in the Portfolio. There can be no assurance that the Portfolio will achieve its investment objective.

The Portfolio is also subject to the risks associated with the Underlying Portfolios’ investments; please see the “Information Regarding the Underlying Portfolios” section of the Portfolio’s Prospectus and the Prospectuses and Statements of Additional Information for the Underlying Portfolios for additional information about these risks.

The following risks can negatively affect the Portfolio’s performance. The most significant risks as of the date of this Prospectus are presented first, followed by additional principal risks in alphabetical order. In this section, the term “Portfolio” may include the Target Allocation Portfolio, an Underlying Portfolio, or both.

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Market Risk

—

The Portfolio is subject to the risk that the securities markets will move down, sometimes rapidly and unpredictably, based on overall economic conditions and other factors, which may negatively affect Portfolio performance. Securities markets also may experience long periods of decline in value. Changes in the financial condition of a single issuer can impact a market as a whole. Geo-political risks, including terrorism, tensions or open conflict between nations, or political or economic dysfunction within some nations that are major players on the world stage, may lead to instability in world economies and markets, may lead to increased market volatility, and may have adverse long-term effects. Events such as natural disasters, public health crises (such as epidemics and pandemics) and social unrest, and governments’ reactions to such events, could cause uncertainty in the markets and may adversely affect the performance of the global economy. Adverse market conditions may not have the same impact on all types of securities. In addition, markets and market participants are increasingly reliant on information data systems. Inaccurate data, software or other technology malfunctions, programming inaccuracies, unauthorized use or access, and similar circumstances may impair the performance of these systems and may have an adverse impact upon a single issuer, a group of issuers, or the market at-large.

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Asset Allocation Risk

— The Portfolio’s investment performance depends upon how its assets are allocated across various asset classes and how its assets are invested within those asset classes. Some asset classes and investments may perform below expectations or the securities markets generally over short and extended periods. The allocation strategies used and the allocation and investment decisions made could cause the Portfolio to lose value and may not produce the desired results.

•

Equity Risk

— In general, the values of stocks and other equity securities fluctuate, and sometimes widely fluctuate, in response to changes in a company’s financial condition as well as general market, economic and political conditions and other factors.

•

Interest Rate Risk

— Changes in interest rates may affect the yield, liquidity and value of investments in income producing or debt securities. Changes in interest rates also may affect the value of other securities. When interest rates rise, the value of the Portfolio’s debt securities generally declines. Conversely, when interest rates decline, the value of the Portfolio’s debt securities generally rises. Typically, the longer the maturity or duration of a debt security, the greater the effect a change in interest rates could have on the security’s price. Thus, the sensitivity of the Portfolio’s debt securities to interest rate risk will increase with any increase in the duration of those securities. Very low or negative interest rates may magnify interest rate risk. A significant or rapid rise in interest rates also could result in losses to the Portfolio.

•

Credit Risk

— The Portfolio is subject to the risk that the issuer or guarantor of a fixed income security, or the counterparty to a transaction, is unable or unwilling, or is perceived as unable or unwilling, to make timely interest or principal payments, or otherwise honor its obligations, which may cause the Portfolio’s holdings to lose value. The downgrade of a security’s credit rating may decrease its value. Lower credit quality also may lead to greater volatility in the price of a security and may negatively affect a security’s liquidity. The credit quality of a security can deteriorate suddenly and rapidly.

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Target Date Risk

— The Portfolio does not provide guaranteed income or payouts to an investor at or after the target year. An investment in the Portfolio may decline in value and will not ensure that an investor will have assets sufficient to cover retirement expenses or that an investor will have enough saved to be able to retire in, or within a few years of, the target year identified in the Portfolio’s name. The adequacy of an investor’s account at and after the target year will depend on a variety of factors, including the amount of money invested in the Portfolio, the length of time the investment was held, and the Portfolio’s returns over time.

•

Risks Related to Investments in Underlying Portfolios

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The Portfolio’s shareholders will indirectly bear fees and expenses paid by the Underlying Portfolios in which it invests, in addition to the Portfolio’s direct fees and expenses. The cost of investing in the Portfolio, therefore, may be higher than the cost of investing in a mutual fund that invests directly in individual stocks and bonds. The Portfolio’s performance depends upon a favorable allocation by the Adviser among the Underlying Portfolios, as well as the ability of the Underlying Portfolios to generate favorable performance. The Underlying Portfolios’ investment programs may not be complementary, which could adversely affect the Portfolio’s performance. The Portfolio’s net asset value is subject to fluctuations in the net asset values of the Underlying Portfolios in which it invests. The Portfolio is also subject to the risks associated with the securities or other investments in which the Underlying Portfolios invest, and the ability of the Portfolio to meet its investment objective will directly depend on the ability of the Underlying Portfolios to meet their objectives. The Portfolio

and the Underlying Portfolios are subject to certain general investment risks, including market risk, asset class risk, issuer-specific risk, investment style risk and portfolio management risk. In addition, to the extent the Portfolio invests in Underlying Portfolios that invest in equity securities, fixed income securities and/or foreign securities, the Portfolio is subject to the risks associated with investing in such securities. The extent to which the investment performance and risks associated with the Portfolio correlate to those of a particular Underlying Portfolio will depend upon the extent to which the Portfolio’s assets are allocated from time to time for investment in the Underlying Portfolio, which will vary.

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Affiliated Portfolio Risk

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The Adviser is subject to conflicts of interest in allocating the Portfolio’s assets among the various Underlying Portfolios because the revenue it receives from some of the Underlying Portfolios is higher than the revenue it receives from other Underlying Portfolios and because the Adviser is also responsible for managing, administering, and with respect to certain Underlying Portfolios, an affiliate is responsible for sub-advising, the Underlying Portfolios. The Portfolio invests in affiliated Underlying Portfolios; unaffiliated Underlying Portfolios generally are not considered for investment.

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Derivatives Risk

— The Portfolio’s investments in derivatives may rise or fall in value more rapidly than other investments and may reduce the Portfolio’s returns and increase the volatility of the Portfolio’s net asset value. Investing in derivatives involves investment techniques and risk analyses different from, and risks in some respects greater than, those associated with investing in more traditional investments, such as stocks and bonds. Derivatives may be leveraged such that a small investment can have a significant impact on the Portfolio’s exposure to stock market values, interest rates, or other investments. As a result, a relatively small price movement in a derivatives contract may cause an immediate and substantial loss, and the Portfolio could lose more than the amount it invested. Some derivatives can have the potential for unlimited losses. In addition, it may be difficult or impossible for the Portfolio to purchase or sell certain derivatives in sufficient amounts to achieve the desired level of exposure, or to terminate or offset existing arrangements, which may result in a loss or may be costly to the Portfolio. Some derivatives are more sensitive to market price fluctuations and to interest rate changes than other investments. Derivatives may not behave as anticipated by the Adviser, and derivatives strategies that are successful under certain market conditions may be less successful or unsuccessful under other market conditions. The Portfolio also may be exposed to losses if the counterparty in the transaction is unable or unwilling to fulfill its contractual obligation. In certain cases, the Portfolio may be hindered or delayed in exercising remedies against or closing out derivatives with a counterparty, resulting in additional losses. Derivatives also may be subject to the risk of mispricing or improper valuation. Derivatives can be difficult to value, and valuation may be more difficult in times of market turmoil. Changing regulation may make derivatives more costly, limit their availability, impact the Portfolio’s ability to maintain its investments in derivatives, disrupt markets, or otherwise adversely affect their value or performance.

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Foreign Securities Risk

— Investments in foreign securities involve risks in addition to those associated with investments in U.S. securities. Foreign markets may be less liquid, more volatile and subject to less government supervision and regulation than U.S. markets, and it may take more time to clear and settle trades involving foreign securities, which could negatively impact the Portfolio’s investments and cause it to lose money. Security values also may be negatively affected by changes in the exchange rates between the U.S. dollar and foreign currencies. Differences between U.S. and foreign legal, political and economic systems, regulatory regimes and market practices, as well as trade barriers and other protectionist trade policies (including those of the U.S.), governmental instability, or other political or economic actions, also may adversely impact security values. World markets, or those in a particular region, may all react in similar fashion to important economic, political or other developments. Events and evolving conditions in certain economies or markets may alter the risks associated with investments tied to countries or regions that historically were perceived as comparatively stable and make such investments riskier and more volatile. Regardless of where a company is organized or its stock is traded, its performance may be significantly affected by events in regions from which it derives its profits or in which it conducts significant operations.

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Futures Contract Risk

— The primary risks associated with the use of futures contracts are (a) the imperfect correlation between the change in market value of the instruments held by the Portfolio and the price of the futures contract; (b) liquidity risks, including the possible absence of a liquid secondary market for a futures contract and the resulting inability to close a futures contract when desired; (c) losses (potentially unlimited) caused by unanticipated market movements; (d) an investment manager’s inability to predict correctly the direction of securities prices, interest rates, currency exchange rates and other economic factors; (e) the possibility that a counterparty, clearing member or clearinghouse will default in the performance of its obligations; (f) if the Portfolio has insufficient cash, it may have to sell securities from its portfolio to meet daily variation margin requirements, and the Portfolio may have to sell securities at a time when it may be disadvantageous to do so; and (g) transaction costs associated with investments in futures contracts may be significant, which could cause or increase losses or reduce gains. Futures contracts are also subject to the same risks as the underlying investments to which they provide exposure. In addition, futures contracts may subject the Portfolio to leveraging risk.

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Investment Grade Securities Risk

— Securities rated in the lower investment grade rating categories (e.g., BBB or Baa) are considered investment grade securities, but are somewhat riskier than higher rated obligations because they are regarded as having only an adequate capacity to pay principal and interest, are considered to lack outstanding investment characteristics, and may possess certain speculative characteristics.

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Large-Cap Company Risk

— Larger more established companies may be unable to respond quickly to new competitive challenges such as changes in technology and consumer tastes, which may lead to a decline in their market price. Many larger companies also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion.

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Leveraging Risk

— When the Portfolio leverages its holdings, the value of an investment in the Portfolio will be more volatile and all other risks will tend to be compounded. Investments that create leverage can result in losses to the Portfolio that exceed the amount originally invested and may accelerate the rate of losses (some of which may be sudden or substantial). For certain investments that create leverage, relatively small market fluctuations can result in large changes in the value of such investments. There can be no assurance that the Portfolio’s use of any leverage will be successful.

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Liquidity Risk

— From time to time, there may be little or no active trading market for a particular investment in which the Portfolio may invest or is invested. In such a market, the value of such an investment and the Portfolio’s share price may fall dramatically. Illiquid investments may be difficult or impossible to sell or purchase at an advantageous time or price or in sufficient amounts to achieve the Portfolio’s desired level of exposure. To meet redemption requests during periods of illiquidity, the Portfolio may be forced to dispose of investments at unfavorable times or prices and/or under unfavorable conditions, which may result in a loss or may be costly to the Portfolio. Investments that are illiquid or that trade in lower volumes may be more difficult to value. The Portfolio also may not receive its proceeds from the sale of certain investments for an extended period of time. Certain investments that were liquid when purchased may later become illiquid, sometimes abruptly, particularly in times of overall economic distress or adverse investor perception. An inability to sell a portfolio position can adversely affect the Portfolio’s value or prevent the Portfolio from being able to take advantage of other investment opportunities. During periods of market stress, an investment or even an entire market segment may become illiquid, sometimes abruptly, which can adversely affect the Portfolio’s ability to limit losses. In addition, a reduction in the ability or willingness of dealers and other institutional investors to make a market in certain securities may result in decreased liquidity in certain markets.

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Mid-Cap and Small-Cap Company Risk

— Mid-cap and small-cap companies carry additional risks because the operating histories of these companies tend to be more limited, their earnings and revenues less predictable (and some companies may be experiencing significant losses), and their share prices more volatile than those of larger, more established companies, all of which can negatively affect their value. In general, these risks are greater for small-cap companies than for mid-cap companies.

•

Non-Investment Grade Securities Risk

— Bonds rated below BBB by Standard & Poor’s Global Ratings or Fitch Ratings, Ltd. or below Baa by Moody’s Investors Service, Inc. (or, if unrated, determined by the investment manager to be of comparable quality) are speculative in nature and are subject to additional risk factors such as increased possibility of default, illiquidity of the security, and changes in value based on changes in interest rates. Non-investment grade bonds, sometimes referred to as “junk bonds,” are usually issued by companies without long track records of sales and earnings, or by those companies with questionable credit strength. The creditworthiness of issuers of non-investment grade debt securities may be more complex to analyze than that of issuers of investment grade debt securities, and reliance on credit ratings may present additional risks.

•

Portfolio Management Risk

— The Portfolio is subject to the risk that strategies used by an investment manager and its securities selections fail to produce the intended results. An investment manager’s judgments or decisions about the quality, relative yield or value of, or market trends affecting, a particular security or issuer, industry, sector, region or market segment, or about the economy or interest rates, may be incorrect or otherwise may not produce the intended results, which may result in losses to the Portfolio. In addition, many processes used in Portfolio management, including security selection, rely, in whole or in part, on the use of various technologies. The Portfolio may suffer losses if there are imperfections, errors or limitations in the quantitative, analytic or other tools, resources, information and data used, or the analyses employed or relied on, by an investment manager, or if such tools, resources, information or data are used incorrectly, fail to produce the desired results, or otherwise do not work as intended. There can be no assurance that the use of these technologies will result in effective investment decisions for the Portfolio.

•

Redemption Risk

— The Portfolio may experience periods of heavy redemptions that could cause the Portfolio to sell assets at inopportune times or at a loss or depressed value. Redemption risk is heightened during periods of declining or illiquid markets. Heavy redemptions could hurt the Portfolio’s performance.

Market developments and other factors, including a general rise in interest rates,

have

the potential to cause investors to move out of fixed income securities on a large scale, which may increase redemptions from mutual

funds that hold large amounts of fixed income securities. The market-making capacity of dealers has been reduced in recent years, in part as a result of structural changes, such as fewer proprietary trading desks at broker-dealers and increased regulatory capital requirements. In addition, significant securities market disruptions related to the coronavirus disease (COVID-19) pandemic have led to dislocation in the market for a variety of fixed income securities (including, without limitation,

commercial

paper, corporate debt securities, certificates of deposit, asset-backed debt securities and municipal obligations), which has decreased liquidity and sharply reduced returns in certain cases. Increased redemptions from mutual funds that hold large amounts of fixed income securities, coupled with a reduction in the ability or willingness of dealers and other institutional investors to buy or hold fixed income securities, may result in decreased liquidity and increased volatility in the fixed income markets.

Risk Lose Money [Text]

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The value of your investment may fall, sometimes sharply, and you could lose money by investing in the Portfolio.

Risk Not Insured Depository Institution [Text]

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

Bar Chart and Performance Table [Heading]

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Risk/Return Bar Chart and Table

Performance Narrative [Text Block]

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The bar chart and table below provide some indication of the risks of investing in the Portfolio by showing changes in the Portfolio’s performance from year to year and by showing how the Portfolio’s average annual total returns for the past one, five and ten years (or since inception) through December 31, 2020 compared to the returns of a broad-based securities market index. The return of the broad-based securities market index (and any additional comparative index) shown in the right hand column below is the return of the index for the last 10 years or, if shorter, since the inception of the share class with the longest history. Past performance is not an indication of future performance.

The performance results do not reflect any Contract-related fees and expenses, which would reduce the performance results.

Performance Information Illustrates Variability of Returns [Text]

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The bar chart and table below provide some indication of the risks of investing in the Portfolio by showing changes in the Portfolio’s performance from year to year and by showing how the Portfolio’s average annual total returns for the past one, five and ten years (or since inception) through December 31, 2020 compared to the returns of a broad-based securities market index.

Performance Past Does Not Indicate Future [Text]

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Past performance is not an indication of future performance.

Bar Chart [Heading]

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Calendar Year Annual Total Returns — Class B

Bar Chart Closing [Text Block]

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Best quarter (% and time period)		Worst quarter (% and time period)

16.05% (2020 2nd Quarter)		-17.89% (2020 1st Quarter)

Performance Table Heading

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Average Annual Total Returns

Target 2035 Allocation Portfolio | Class B

Risk/Return:

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Shareholder Fees (fees paid directly from your investment)

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rr_ManagementFeesOverAssets

0.10%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

rr_OtherExpensesOverAssets

0.23%

Acquired fund fees and expenses (underlying portfolios)

rr_AcquiredFundFeesAndExpensesOverAssets

0.51%

Total annual portfolio operating expenses

rr_ExpensesOverAssets

1.09%

rr_ExpenseExampleYear01

$ 111

rr_ExpenseExampleYear03

347

rr_ExpenseExampleYear05

601

rr_ExpenseExampleYear10

1,329

rr_ExpenseExampleNoRedemptionYear01

111

rr_ExpenseExampleNoRedemptionYear03

347

rr_ExpenseExampleNoRedemptionYear05

601

rr_ExpenseExampleNoRedemptionYear10

$ 1,329

rr_AnnualReturn2011

(4.67%)

rr_AnnualReturn2012

14.20%

rr_AnnualReturn2013

22.16%

rr_AnnualReturn2014

4.50%

rr_AnnualReturn2015

(1.98%)

rr_AnnualReturn2016

7.94%

rr_AnnualReturn2017

17.78%

rr_AnnualReturn2018

(7.14%)

rr_AnnualReturn2019

22.28%

rr_AnnualReturn2020

13.70%

Highest Quarterly Return, Label

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Best quarter

Highest Quarterly Return, Date

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Jun. 30, 2020

Highest Quarterly Return

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16.05%

Lowest Quarterly Return, Label

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Worst quarter

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

Lowest Quarterly Return

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(17.89%)

rr_AverageAnnualReturnYear01

13.70%

rr_AverageAnnualReturnYear05

10.42%

rr_AverageAnnualReturnYear10

8.38%

Target 2035 Allocation Portfolio | Class K

Risk/Return:

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Shareholder Fees (fees paid directly from your investment)

rr_ShareholderFeeOther

rr_ManagementFeesOverAssets

0.10%

Distribution and/or service (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.23%

Acquired fund fees and expenses (underlying portfolios)

rr_AcquiredFundFeesAndExpensesOverAssets

0.51%

Total annual portfolio operating expenses

rr_ExpensesOverAssets

0.84%

rr_ExpenseExampleYear01

$ 86

rr_ExpenseExampleYear03

268

rr_ExpenseExampleYear05

466

rr_ExpenseExampleYear10

1,037

rr_ExpenseExampleNoRedemptionYear01

86

rr_ExpenseExampleNoRedemptionYear03

268

rr_ExpenseExampleNoRedemptionYear05

466

rr_ExpenseExampleNoRedemptionYear10

$ 1,037

rr_AverageAnnualReturnYear01

13.95%

rr_AverageAnnualReturnYear05

10.71%

Since Inception

rr_AverageAnnualReturnSinceInception

10.09%

rr_AverageAnnualReturnInceptionDate

Dec. 01, 2011

Target 2035 Allocation Portfolio | S&P Target Date 2035 Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

rr_AverageAnnualReturnYear01

12.79%

rr_AverageAnnualReturnYear05

10.47%

rr_AverageAnnualReturnYear10

8.91%