Objective, Primary [Text Block]

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Risk/Return [Heading]

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EQ/Invesco Global Portfolio – Class IA, IB and K Shares

Objective [Heading]

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Investment Objective:

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Seeks to achieve capital appreciation.

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)

Fee Waiver or Reimbursement over Assets, Date of Termination

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April 30, 2022

Portfolio Turnover [Heading]

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PORTFOLIO TURNOVER

Portfolio Turnover [Text Block]

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The Portfolio 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. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 15% of the average value of the Portfolio.

Portfolio Turnover, Rate

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15.00%

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 periods indicated, that your investment has a 5% return each year, that the Portfolio’s operating expenses remain the same, and that the Expense Limitation Arrangement is not renewed. 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 Strategy:

Strategy Narrative [Text Block]

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Under normal circumstances, the Portfolio invests primarily in equity securities of U.S. and foreign companies. The Portfolio can invest without limit in foreign securities, including depositary receipts, and can invest in

any

country, including countries with developing or emerging markets. However, the Portfolio currently emphasizes its investments in developed markets such as the United States, countries in Western Europe and Japan. The Portfolio normally will invest a significant portion of its assets in foreign securities. The Portfolio may invest in companies of any size, however, it primarily invests in

mid-

and

large-cap

companies. Equity securities in which the Portfolio may invest may include common stocks, preferred stocks and warrants.

The Portfolio is not required to allocate its investments in any set percentage in any particular countries. The Portfolio expects to invest in companies tied economically to a number of different countries and normally invests in companies in at least three countries (one of which may be the United States). From time to time, the Portfolio may increase the relative emphasis of investments in a particular industry.

The Sub-Adviser primarily looks for quality companies, regardless of domicile, that have sustainable growth. The Sub-Adviser’s investment approach combines a thematic

approach to idea generation with bottom-up, fundamental company analysis. The Sub-Adviser seeks to identify secular changes in the world and looks for pockets of durable change that the Sub-Adviser believes will drive global growth for the next decade. These large scale structural themes are referred to collectively as MANTRA

: Mass Affluence, New Technology, Restructuring, and Aging. The Sub-Adviser does not target a fixed allocation with regard to any particular theme, and may choose to focus on various sub-themes within each theme. Within each sub-theme, the Sub-Adviser employs fundamental company analysis to select investments for the Portfolio. The economic characteristics the Sub-Adviser seeks include a combination of high return on invested capital, good cash flow characteristics, high barriers to entry, dominant market share, a strong competitive position, talented management, and balance sheet strength that the Sub-Adviser believes will enable the company to fund its own growth. These criteria may vary. The Sub-Adviser also considers how industry dynamics, market trends and general economic conditions may affect a company’s earnings outlook.

The Sub-Adviser has a long-term investment horizon of typically three to five years. The Sub-Adviser also has a contrarian buy discipline; the

Sub-Adviser

buys high quality companies that fit its investment criteria when their valuations underestimate their long-term earnings potential. For example, a company’s stock price may dislocate from its fundamental outlook due to a short-term earnings glitch or negative, short-term market sentiment, which can give rise to an investment opportunity. The Sub-Adviser monitors individual issuers for changes in earnings potential or other effects of changing market conditions that may trigger a decision to sell a security.

The Portfolio also may lend its portfolio securities to earn additional income.

Risk [Heading]

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Principal Risks:

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 following risks can negatively affect the Portfolio’s performance. The most significant risks as of the date of this Prospectus are listed first, followed by additional risks in alphabetical order.

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.

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.

Foreign Securities Risk:

Investments in foreign securities, including depositary receipts, 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.

Currency Risk:

Investments that are denominated in or that provide exposure to foreign currencies are

subject to the risk that those currencies will decline in value relative to the U.S. dollar. Any such decline may erode or reverse any potential gains from an investment in securities denominated in foreign currency or may widen existing loss. In the case of hedging positions, there is the risk that the U.S. dollar will decline in value relative to the currency being hedged. Currency rates may fluctuate significantly over short periods of time.

Emerging Markets Risk:

Investments in emerging market countries are more susceptible to loss than investments in more developed foreign countries and may present market, credit, currency, liquidity, legal, political, technical and other risks different from, or greater than, the risks of investing in more developed foreign countries. Emerging market countries may be more likely to experience rapid and significant adverse developments in their political or economic structures, intervene in financial markets, restrict foreign investments, impose high withholding or other taxes on foreign investments, impose restrictive exchange control regulations, or nationalize or expropriate the assets of private companies, which may have negative impacts on transaction costs, market price, investment returns and the legal rights and remedies available to the Portfolio. In addition, the securities markets of emerging markets countries generally are smaller, less liquid and more volatile than those of more developed foreign countries, and emerging market countries often have less uniformity in regulatory, accounting, auditing and financial reporting requirements or standards, which may impact the availability and quality of information about issuers, and less reliable clearance and settlement, registration and custodial procedures. Securities of issuers traded on foreign exchanges may be suspended. The likelihood of such suspensions may be higher for securities of issuers in emerging market countries than in countries with more developed markets. The risks associated with investments in emerging market countries often are significant, and vary from jurisdiction to jurisdiction and company to company.

European Economic Risk:

The economies of European Union (“EU”) member countries and their trading partners, as well as the broader global economy, may be adversely affected by changes in the euro’s exchange rate, changes in EU or governmental regulations on trade, and the threat of default or an actual default by an EU member country on its sovereign debt, which could negatively impact the Portfolio’s investments and cause it to lose money. The United Kingdom (“UK”) left the EU on January 31, 2020, commonly referred to as “Brexit.” Following a transition period, the UK’s post-Brexit trade agreement with the EU went into effect on January 1, 2021. The agreement governs the new relationship between the UK and the EU with respect to trading goods and services, but significant aspects of the relationship remain unsettled and subject to further negotiation and agreement. The political, regulatory, economic, and market consequences of Brexit are uncertain, and the ultimate ramifications may not be known for some time. The negative impact on not only the UK and European economies but also the broader global economy could be significant, potentially resulting in increased volatility and illiquidity, which could adversely affect the value of the Portfolio’s investments. Any further withdrawals from the EU could cause additional market disruption globally.

Geographic Concentration Risk:

To the extent the Portfolio invests a significant portion of its assets in securities of companies domiciled, or exercising the predominant part of their economic activity, in one country or geographic region, it assumes the risk that economic, political, social and environmental conditions in that particular country or region will have a significant impact on the Portfolio’s investment performance and that the Portfolio’s performance will be more volatile than the performance of more geographically diversified funds. In addition, the risks associated with investing in a narrowly defined geographic area are generally more pronounced with respect to investments in emerging market countries.

Investment Style Risk:

The Portfolio may use a particular style or set of styles — in this case, a “growth” style — to select investments. A particular style may be out of favor or may not produce the best results over short or longer time periods. Growth stocks may be more sensitive to changes in current or expected earnings than the prices of other stocks. Growth investing also is subject to the risk that the stock price of one or more companies will fall or will fail to appreciate as anticipated by the Portfolio, regardless of movements in the securities market. Growth stocks also tend to be more volatile than value stocks, so in a declining market their prices may decrease more than value stocks in general. Growth stocks also may increase the volatility of the Portfolio’s share price.

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.

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.

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.

Sector Risk:

From time to time, based on market or economic conditions, the Portfolio may have significant positions in one or more sectors of the market. To the extent the Portfolio invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events.

Securities Lending Risk:

The Portfolio may lend its portfolio securities to seek income. There is a risk that a borrower may default on its obligations to return loaned securities. The Portfolio will be responsible for the risks associated with the investment of cash collateral and may lose money on its investment of cash collateral or may fail to earn sufficient income on its investment to meet obligations to the borrower. Securities lending may introduce leverage into the Portfolio. In addition, delays may occur in the recovery of loaned securities from borrowers, which could interfere with the Portfolio’s ability to vote proxies or to settle transactions.

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 through December 31, 2020 compared to the returns of a broad-based securities market index. Past performance is not an indication of future performance.

Class K shares have not commenced operations as of the date of this Prospectus.

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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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 IB

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

25.19% (2020 2nd Quarter)		–21.72% (2020 1st Quarter)

Performance Table Heading

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Average Annual Total Returns

EQ/Invesco Global Portfolio | Class IA Shares

Shareholder Fees (fees paid directly from your investment)

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Management Fee

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0.85%

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

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0.25%

Other Expenses

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0.15%

Total Annual Portfolio Operating Expenses

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1.25%

Fee Waiver and/or Expense Reimbursement

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(0.10%)

^[1]

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

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1.15%

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$ 117

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387

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677

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1,502

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117

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387

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677

EQ/Invesco Global Portfolio | Class IB Shares

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$ 1,502

One Year

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27.00%

Five Years

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14.34%

Ten Years

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11.08%

Maximum Deferred Sales Charge (as a percentage of Offering Price)

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Management Fee

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0.85%

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

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0.25%

Other Expenses

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0.15%

Total Annual Portfolio Operating Expenses

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1.25%

Fee Waiver and/or Expense Reimbursement

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(0.10%)

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

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1.15%

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$ 117

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387

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677

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1,502

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117

rr_ExpenseExampleNoRedemptionYear03

387

rr_ExpenseExampleNoRedemptionYear05

677

Highest Quarterly Return, Label

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$ 1,502

2011

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(8.62%)

2012

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20.39%

2013

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26.33%

2014

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1.78%

2015

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3.15%

2016

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0.05%

2017

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35.60%

2018

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(13.46%)

2019

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31.11%

2020

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27.01%

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Best quarter

Highest Quarterly Return, Date

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Jun. 30, 2020

Highest Quarterly Return

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25.19%

Lowest Quarterly Return, Label

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Worst quarter

Lowest Quarterly Return, Date

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Mar. 31, 2020

Lowest Quarterly Return

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(21.72%)

One Year

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27.01%

Five Years

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14.35%

Ten Years

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11.05%

EQ/Invesco Global Portfolio | Class K Shares

Shareholder Fees (fees paid directly from your investment)

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Management Fee

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0.85%

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

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none

Other Expenses

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0.15%

^[2]

Total Annual Portfolio Operating Expenses

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1.00%

Fee Waiver and/or Expense Reimbursement

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(0.10%)

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

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0.90%

Other Expenses, New Fund, Based on Estimates [Text]

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Based on estimated amounts for the current fiscal year.

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$ 92

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308

rr_ExpenseExampleYear05

543

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1,216

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308

rr_ExpenseExampleNoRedemptionYear05

543

EQ/Invesco Global Portfolio | MSCI AC World (Net) Index (reflects no deduction for fees or expenses)

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$ 1,216