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Guardian Strategic Large Cap Core VIP Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Guardian Strategic Large Cap Core VIP Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Fund seeks capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table shows the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. The table does not reflect charges, fees or expenses that are, or may be, imposed under your variable annuity contract or variable life insurance policy through which Fund shares are offered as an investment option. If those charges, fees or expenses were reflected, the fees and expenses shown in the table would be higher. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the fee table or example below. For information about these charges, fees and expenses, please refer to the applicable contract or policy prospectus.
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)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination Apr. 30, 2023
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. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Example, affect the Fund's performance. As of the end of its most recent fiscal year (for the period from October 25, 2021 through December 31, 2021), the Fund's portfolio turnover rate was 80% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 80.00%
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Other expenses are based on estimates for the current fiscal year.
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. This Example does not reflect charges, fees or expenses that are, or may be, imposed under your variable annuity contract or variable life insurance policy, and would be higher if it did. The Example reflects contractual fee waivers and/or expense reimbursements only for the duration of the current commitment, if applicable. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

AllianceBernstein L.P., the Fund's subadviser (the "Subadviser"), seeks to achieve the Fund's objective by investing, under normal circumstances, at least 80% of its net assets plus any borrowings for investment purposes (measured at the time of investment) in common stocks, or other investments that the Subadviser believes have similar economic characteristics, of companies with large market capitalizations. The Subadviser defines large capitalization companies as companies

with market capitalizations similar to companies in the Standard & Poor's 500® Index (the "Index") at the time of purchase. Although expected to change frequently, the market capitalization range of the Index was approximately $5.2 billion to $2.85 trillion as of March 31, 2022.

The Fund invests in companies that are determined by the Subadviser to offer favorable long-term sustainable profitability, price stability, and attractive valuations. The Subadviser selects investments based on an integrated approach that combines both fundamental and quantitative research to identify attractive investment opportunities. Factors that the Subadviser considers include: a company's record and projections of profitability, accuracy and availability of information with respect to the company, success and experience of management, competitive advantage, low stock price volatility, and liquidity of the company's securities. The Subadviser compares these results to the characteristics of the general stock markets to determine the relative attractiveness of each company at a given time. The Subadviser weighs economic, political and market factors in making investment decisions. The Subadviser seeks to manage the Fund's portfolio so that it is subject to less share price volatility than many other U.S. mutual funds, although there can be no guarantee that the Subadviser will be successful in this regard. The Subadviser may also consider environmental, social, and governance ("ESG") factors as part of its fundamental analysis where the Subadviser believes such factors could materially impact the economic value or risk profile of an issuer. ESG factors considered may include, but are not limited to, climate change, an issuer's governance structure and practices, and diversity and labor practices. The evaluation of ESG risks and opportunities is based on proprietary research as well as third-party research and data. The Subadviser uses ESG factors to screen the investment universe.

The Subadviser expects that normally the Fund's portfolio will primarily invest in securities issued by U.S. companies, although it may, at times, also invest in foreign securities. The Fund may, at times, invest in shares of exchange-traded funds (ETFs) in lieu of making direct investments in securities or to seek to obtain desired exposures.

The Fund may enter into derivatives transactions, such as options, futures contracts, forwards and swaps. The Fund may use options strategies involving the purchase and/or writing of combinations of call and/or put options, including on individual securities and stock indices, futures contracts (including futures contracts on individual securities and stock indices) or shares of ETFs. Derivatives transactions may be used, for example, in an effort to earn extra income, to attempt to adjust exposure to individual securities or markets, or to seek to protect all, or a portion, of the Fund's portfolio from a decline in value, sometimes within certain ranges.

The Subadviser typically may sell investments when it believes that they no longer offer attractive future returns compared with other investment opportunities or that they present undesirable risks or in an attempt to limit losses on investments that may decline or have declined in value.
Risk [Heading] rr_RiskHeading Principal Investment Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

The risks summarized below are the principal risks of investing in the Fund. There is no guarantee that the Fund will achieve its investment objective and it is possible to lose money by investing in the Fund.

Market Risk. The financial and securities markets are volatile and may be affected by political, regulatory, social, economic, and other global market developments and disruptions, including those arising out of geopolitical events, public health emergencies (such as pandemics and epidemics), natural disasters, terrorism, and governmental or quasi-governmental actions. These events may negatively affect issuers, industries and markets worldwide and adversely affect the Fund. The price, value or liquidity of the Fund's investments may decline and will fluctuate, sometimes rapidly and unpredictably, in response to general market conditions or other factors. Different sectors of the market, issuers, and security types may react differently to such developments.

Issuer Risk. The Fund's investments may be adversely affected by a number of factors that directly relate to the issuer of securities held by the Fund, such as its earnings prospects and overall financial position. In addition, an issuer in which the Fund invests, or to which it has exposure, may perform poorly because of poor management decisions or other events, conditions, or factors, which could also negatively affect the Fund.

Active Management Risk. The Fund is actively managed by the Subadviser. There is no guarantee that the Subadviser's investment techniques, risk analysis, and judgment implemented in making investment decisions for the Fund will be accurate or will produce the desired outcome. As a result, the Fund may be adversely affected and may underperform its benchmark index or funds with similar investment objectives. The Fund may actively and frequently trade portfolio securities, which may lead to higher transaction costs that may negatively affect the Fund's performance.

Environmental, Social and Governance (ESG) Considerations Risk. To the extent the Subadviser uses ESG factors to evaluate investments, the consideration of such factors may adversely affect the Fund's performance. Not every ESG

factor may be identified or evaluated for every investment. ESG characteristics are not the only factors considered and, as a result, the issuers in which the Fund invests may not be issuers with favorable ESG characteristics or high ESG ratings. The application of ESG factors may result in the Fund performing differently than other funds and strategies in its peer group that do not consider ESG factors.

Equity Securities Risk. The price or value of the Fund's investments in a company's equity securities, such as common or preferred stock, may rise or fall rapidly or unpredictably and are subject to real or perceived changes in the company's financial condition and overall market and economic conditions. Equity securities are normally more volatile than fixed-income investments. Common stocks generally represent the riskiest investment in a company and preferred stocks generally rank junior to a company's debt with respect to dividends, which the company may or may not declare.

Large-Capitalization Company Risk. Large-capitalization companies may be unable to attain the same growth rate of small- or mid-capitalization companies. In addition, large-capitalization companies may be unable to respond to competitive challenges or opportunities as quickly as smaller companies.

Growth Investment Style Risk. Different investment styles tend to perform differently and shift in and out of favor depending on changes in market and economic sentiment and conditions. Securities of "growth" companies may be more volatile than other stocks and may involve special risks. If the Subadviser's perception of a company's growth potential is not realized, the securities purchased may not perform as expected and may be out of favor for an extended period of time, reducing the Fund's returns. Thus, the Fund may underperform other equity funds that employ a different investment style during such periods.

Value Investment Style Risk. Different investment styles tend to perform differently and shift in and out of favor depending on changes in market and economic sentiment and conditions. The Fund invests in stocks believed by the Subadviser to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. Thus, the Fund may underperform other equity funds that employ a different investment style during such periods.

Counterparty Risk. Certain investments or investment transactions are subject to the risk that the Fund's counterparty will become insolvent or otherwise be unwilling or unable to perform its obligations in a timely manner or at all. As a result, the Fund may be unable to recover its investment from the counterparty or may obtain a limited recovery, and/or recovery may be delayed, which may result in a loss to the Fund.

Derivatives Risk. Derivatives are instruments whose value depends on (or is derived from) the value of an underlying security, asset, or other benchmark. Derivatives (including short exposures through derivatives) pose risks in addition to and greater than those associated with investing directly in or shorting securities or other investments, including potentially heightened liquidity and valuation risk and counterparty risk. In addition, certain derivatives result in leverage, which can result in losses substantially greater than the amount invested in the derivatives by the Fund.

Foreign Investment and Currency Risk. Foreign investments, or exposure to foreign markets, present greater risks than investing in securities of U.S. issuers. Foreign securities are particularly susceptible to liquidity and valuation risk and may be especially volatile. These investments are subject to additional risks, including: smaller markets; differing reporting, accounting, and auditing standards; nationalization, expropriation, or confiscatory taxation; foreign currency fluctuations, currency blockage, or replacement; potential for default on sovereign debt; and political changes or diplomatic developments, which may include the imposition of economic sanctions or other measures by the United States or other governments and supranational organizations. The Fund's foreign investments that are denominated in or provide exposure to a foreign currency may be negatively affected by a decline in the foreign currency's value relative to the U.S. dollar. The value of foreign currencies may fluctuate quickly and significantly. Foreign investments may also be subject to risk of loss because of more or less foreign government regulation, less public information, and less stringent investor protections and disclosure standards.

Forwards and Futures Contracts Risk. Forwards and futures contracts are derivative contracts that obligate a purchaser to purchase, and a seller to sell, a specific amount of an asset (e.g., a currency or security) at a specified future date and price. In addition to the risks generally applicable to derivatives, these contracts are particularly subject to the risk of imperfect correlation between the change in market value of the asset underlying a contract or the asset held by the Fund being hedged and the price of the forward or futures contract, as well as losses caused by unanticipated market movements, which are potentially unlimited.

New/Small Fund Risk. The Fund has limited or no operating history and may initially operate with a small asset base. There can be no assurance that the Fund will be successful or grow to or maintain a viable size.

Options Risk. An option is a derivative contract where, for a premium payment or fee, the purchaser of the option is given the right but not the obligation to buy (a call option) or sell (a put option) the underlying asset (or settle for cash an amount based on an underlying asset, rate or index) at a specified price (the exercise price) during a period of time or on a specified date or dates. In addition to the risks generally applicable to derivatives, the prices of options can be highly volatile and the Fund's use of options can lower total returns and may affect the Fund's portfolio turnover rate and the amount of brokerage commissions paid by the Fund.

Other Investment Companies Risk. To the extent the Fund invests in other investment companies (such as ETFs), the Fund will incur a pro rata share of the expenses of these investment companies and the Fund will be subject to the risks associated with these investment companies. An ETF may trade in the secondary market at a price below or above the value of its underlying portfolio and may not be liquid. In addition, an ETF may not replicate exactly the performance of the index it seeks to track for a number of reasons.

Swaps Risk. Swap agreements are derivatives contracts where the parties agree to exchange the returns (or differentials in rates of return) earned or realized on particular predetermined investments or instruments. In addition to the risks generally applicable to derivatives, risks associated with swap agreements include adverse changes in the returns of the underlying instruments, failure of the counterparties to perform under the agreement's terms and the possible lack of liquidity with respect to the agreements.
Risk Lose Money [Text] rr_RiskLoseMoney There is no guarantee that the Fund will achieve its investment objective and it is possible to lose money by investing in the Fund.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Past Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

No performance history is presented for the Fund because it does not yet have a full calendar year of performance. Updated performance information will be available at www.guardianlife.com or by calling the phone number on the back of the Prospectus.
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess No performance history is presented for the Fund because it does not yet have a full calendar year of performance.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.guardianlife.com
Guardian Strategic Large Cap Core VIP Fund | Guardian Strategic Large Cap Core VIP Fund  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.53%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.08% [1]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.86%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.02%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.84%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 86
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 272
[1] Other expenses are based on estimates for the current fiscal year.
[2] Park Avenue Institutional Advisers LLC, the Fund's investment manager (the "Manager"), has contractually agreed through April 30, 2023 to waive certain fees and/or reimburse certain expenses incurred by the Fund to the extent necessary to limit the Fund's Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement to 0.84% of the Fund's average daily net assets (excluding, if applicable, any acquired fund fees and expenses, taxes, interest, transaction costs and brokerage commissions, litigation and extraordinary expenses). The limitation may not be increased or terminated prior to this time without action by the Board of Trustees.