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Guardian Integrated Research VIP Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Guardian Integrated Research 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, 2024
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. For the most recent fiscal year, the Fund's portfolio turnover rate was 274% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 274.00%
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Restated to reflect current management fees.
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

Under normal circumstances, the Fund invests primarily in equity securities, or other investments with similar economic characteristics, of companies that have market capitalizations, at the time of purchase, in the range of companies in the Standard & Poor's 500® Index (the "Index"). 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. As such, the size of the companies in which the Fund invests may change. As long as an investment continues to meet the Fund's other investment criteria, as described below, the Fund may choose to continue to hold a security even if the company's market capitalization grows beyond the market capitalization of the largest company within the Index or falls below the market capitalization of the smallest company within the Index.

The Fund may invest up to 10% of its total assets in foreign equity securities. The Fund normally invests in common stocks. The Fund may from time to time emphasize one or more sectors in selecting its investments, such as the information technology sector. Generally, the Fund anticipates holding between 60 and 90 securities in its portfolio; however, the Fund may hold, at any time, more or fewer securities than noted in this range.

In selecting investments, Wellington Management Company LLP (the "Subadviser") employs an active management strategy of fundamental bottom-up analysis along with risk management criteria in identifying opportunities and constructing the Fund's portfolio. The Subadviser seeks to identify companies with, among other attributes, improving quality metrics (e.g., financial stability, market positioning and strength of management team and governance), fundamental business momentum (e.g. growth in revenues, cash flows, and profitability), and attractive relative valuations. 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 solely on proprietary research. The Subadviser may sell a security when the security's price reaches a target set by the Subadviser or if the Subadviser believes that there is deterioration in the issuer's financial circumstances or fundamental prospects, or if other investments are more attractive, or for other reasons.
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 the spread of infectious diseases, pandemics and epidemics), natural disasters, terrorism, and governmental or quasi-governmental actions. The market value of securities in which the Fund invests is based upon the market's perception of value and is not necessarily an objective measure of the securities' value. Such changes may be rapid and unpredictable. 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.

Sector Risk. To the extent the Fund's investments focus on one or more sectors of the economy, the Fund's performance will be particularly susceptible to conditions and developments relating to such sector(s). For example, the Fund may be more susceptible to the particular risks that may affect companies in the information technology sector, as well as other technology-related sectors (collectively, the technology sectors) than if it were invested in a wider variety of companies in unrelated sectors. In addition, the Fund will be more exposed to price movements affecting companies in such sector(s) than a more broadly invested 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.

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.

Portfolio Turnover Risk. To the extent the Fund engages in active trading, it may have high portfolio turnover. Frequent purchases and sales of portfolio investments may result in higher Fund expenses, such as higher brokerage fees or other transaction costs, which may negatively affect the Fund's performance.
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

The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for the 1 year, 5 year and since inception periods compare with those of a broad measure of market performance. The Fund's past performance is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available at www.guardianlife.com or by calling the phone number on the back of the Prospectus. Variable annuity contract or variable life insurance policy fees, expenses and charges are not reflected in the returns shown in the bar chart and table below. If they were, returns would be less than those shown.

The Fund replaced its subadviser effective October 1, 2019 and October 12, 2021, respectively, and modified its principal investment strategies. The past performance shown in the bar chart and table below prior to October 1, 2019, and between October 1, 2019 and October 12, 2021, reflects the performance of each of the Fund's prior subadvisers and principal investment strategies, respectively.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for the 1 year, 5 year and since inception periods compare with those of a broad measure of market performance.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.guardianlife.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund's past performance is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Annual Returns (by calendar year)
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads Variable annuity contract or variable life insurance policy fees, expenses and charges are not reflected in the returns shown in the bar chart and table below.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest Quarterly Return – 20.12% (2nd Q 2020)
Lowest Quarterly Return – -17.33% (1st Q 2020)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest Quarterly Return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 20.12%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest Quarterly Return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (17.33%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2021)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Guardian Integrated Research VIP Fund | Standard & Poor's 500® Index (reflects no deduction for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 28.71%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 18.47%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 18.07%
Guardian Integrated Research VIP Fund | Guardian Integrated Research VIP Fund  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.48% [1]
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Recoupment of Expenses rr_Component3OtherExpensesOverAssets 0.02%
Other Expenses rr_OtherExpensesOverAssets 0.16%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.91%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.05%) [2]
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.86%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 86
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 283
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 497
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,113
Annual Return 2017 rr_AnnualReturn2017 19.92%
Annual Return 2018 rr_AnnualReturn2018 (8.31%)
Annual Return 2019 rr_AnnualReturn2019 27.09%
Annual Return 2020 rr_AnnualReturn2020 19.22%
Annual Return 2021 rr_AnnualReturn2021 28.14%
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 28.14%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 16.38%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 15.79%
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Sep. 01, 2016
[1] Restated to reflect current management fees. The management fee rate is as follows: 0.50% on assets up to $200 million; 0.43% on assets from $200 million to $300 million; and 0.40% on assets over $300 million.
[2] Park Avenue Institutional Advisers LLC, the Fund's investment manager (the "Manager"), has contractually agreed through April 30, 2024 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, may be terminated only upon approval of the Board of Trustees, and is subject to the Manager's recoupment rights. The Manager may be entitled to recoupment of previously waived fees and reimbursed expenses from the Fund for three years from the date of the waiver or reimbursement, subject to the expense limitation in effect at the time of the waiver or reimbursement and at the time of the recoupment, if any. "Fee Waiver and/or Expense Reimbursement" and "Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement" have been restated to reflect the current expense limitation arrangement.