Label	Element	Value
Risk Return Abstract	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	Prudential's Gibraltar Fund, Inc.
Prospectus Date	rr_ProspectusDate	May 01, 2025
Prudentials Gibraltar Fund
Risk Return Abstract	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	<span style="color:#545454;font-family:Arial;font-size:14pt;">FUND SUMMARY</span>
Objective [Heading]	rr_ObjectiveHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">Investment Objective</span>
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The investment objective of the Fund is growth of capital to an extent compatible with a concern for preservation of principal. Current income, if any, is incidental.
Expense [Heading]	rr_ExpenseHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">Fund Fees and Expenses</span>
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The table below shows the fees and expenses that you may pay if you invest in shares of the Fund. The table does not include charges that are imposed by the investment plan contracts or the variable annuity contracts. Because contract charges are not included, the total fees and expenses that you will incur will be higher than the fees and expenses set forth in the table. See your contract for more information about contract charges.
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	<span style="font-family:Arial Narrow;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Annual Fund Operating Expenses % (expenses that you pay each year as a percentage of the value of your investment)</span>
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Portfolio Turnover. </span>
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 annual fund operating expenses or in the example, affect the Fund's performance. During the Fund's most recent fiscal year, the Fund's portfolio turnover rate was 19% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	19.00%
Expense Example [Heading]	rr_ExpenseExampleHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Example. </span>
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The table does not include contract charges. Because contract charges are not included, the total fees and expenses that you will incur will be higher than the fees and expenses set forth in the example. See your contract for more information about contract charges. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Strategy [Heading]	rr_StrategyHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">Investments, Risks and Performance </span><span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Principal Investment Strategies.</span>
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund invests primarily in common stock and other securities convertible into common stock. Those investments can include American Depositary Receipts, which are dollar-denominated certificates representing a right to receive securities of a foreign issuer. The Fund's portfolio managers seek to invest in medium to large companies that they believe possess sustainable, above-market growth in revenues, earnings, and cash flows and reasonable valuations, resulting in a fund that exhibits growth characteristics blended with valuations comparable to that of the market. The Fund may also invest in preferred stock, bonds, debenture notes and other evidences of indebtedness of a character customarily acquired by institutional investors. These investments may or may not be convertible into stock or accompanied by warrants or rights to acquire stock. These investments may or may not be publicly traded. The Fund may also invest in money market instruments, such as short-term debt securities. The Fund usually invests only a moderate proportion of its assets in money market instruments to facilitate purchases and redemptions and portfolio trading. The Fund may lend its securities and invest in warrants.
Risk [Heading]	rr_RiskHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Principal Risks of Investing in the Fund.</span>
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Past Performance.</span>
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The bar chart and table provide 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 1, 5, and 10 years compare with those of a broad-based securities market index that reflects the performance of the overall market applicable to the Fund.Past performance does not mean that the Fund will achieve similar results in the future.The Fund's returns and average annual returns shown in the chart and table are after deduction of Fund expenses and do not include contract charges. If contract charges were included, the returns shown would have been lower than those shown. See your contract for information about contract charges.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	<span style="color:#000000;font-family:Arial;font-size:10pt;">The bar chart and table provide 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 1, 5, and 10 years compare with those of a broad-based securities market index that reflects the performance of the overall market applicable to the Fund.</span>
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	<span style="color:#000000;font-family:Arial;font-size:10pt;">Past performance does not mean that the Fund will achieve similar results in the future.</span>
Bar Chart [Heading]	rr_BarChartHeading	Annual Total Returns
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	<span style="color:#000000;font-family:Arial;font-size:10pt;">The Fund's returns and average annual returns shown in the chart and table are after deduction of Fund expenses and do not include contract charges. If contract charges were included, the returns shown would have been lower than those shown. See your contract for information about contract charges.</span>
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Best Quarter:Worst Quarter:28.63%2nd Quarter 2020-23.99%2nd Quarter 2022
Performance Table Heading	rr_PerformanceTableHeading	<span style="font-family:Arial Narrow;font-size:8pt;font-weight:bold;">Average Annual Total Returns (For the periods ended December 31, 2024)</span>
Prudentials Gibraltar Fund | Risk Lose Money [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	All investments have risks to some degree, and it is possible that you could lose money by investing in the Fund.
Prudentials Gibraltar Fund | Risk Not Insured Depository Institution [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Prudentials Gibraltar Fund | Equity Securities Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Equity Securities Risk. The value of a particular stock or equity-related security held by the Fund could fluctuate, perhaps greatly, in response to a number of factors, such as changes in the issuer’s financial condition or the value of the equity markets or a sector of those markets. Such events may result in losses to the Fund. In addition, due to decreases in liquidity, the Fund may be unable to sell its securities holdings within a reasonable time at the price it values the security or at any price.
Prudentials Gibraltar Fund | Exchange Traded Funds ETF Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Exchange-Traded Fund (ETF) Risk. Exchange-Traded Funds (ETF) Risk. An investment in an ETF generally presents the same primary risks as an investment in a mutual fund that has the same investment objective, strategies, and policies. In addition, the market price of an ETF's shares may trade above or below its net asset value and there may not be an active trading market for an ETF's shares. The Fund could lose money investing in an ETF if the prices of the securities owned by the ETF go down.
Prudentials Gibraltar Fund | Expense Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Expense Risk. The actual cost of investing in the Fund may be higher than the expenses shown in the “Annual Fund Operating Expenses” table above for a variety of reasons, including, for example, if the Fund’s average net assets decrease.
Prudentials Gibraltar Fund | Fixed Income Securities Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Fixed Income Securities Risk. Investment in fixed income securities involves a variety of risks, including that: an issuer or guarantor of a security will be unable or unwilling to pay obligations when due; due to decreases in liquidity, the Fund may be unable to sell its securities holdings within a reasonable time at the price it values the security or at any price; and the Fund’s investment may decrease in value when interest rates rise. Volatility in interest rates and in fixed income markets may increase the risk that the Fund’s investment in fixed income securities will go down in value. In recent years, the US government began implementing increases to the federal funds interest rate and there may be further rate increases. To the extent rates increase substantially and/or rapidly, a fund with significant investment in fixed income investments may be subject to significant losses. Changes in interest rates may also affect the liquidity of the Fund’s investments in fixed income securities.
Prudentials Gibraltar Fund | Inflation and Deflation Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Inflation and Deflation Risk. The Fund may be subject to inflation and deflation risk. Inflation risk is the risk that the value of assets or income from its investments will be worth less in the future as inflation decreases the value of payments at future dates. As inflation increases, the real value of the Fund's holdings could decline. Deflation risk is the risk that prices throughout the economy decline over time. Deflation may have an adverse effect on the creditworthiness of issuers and may make issuer default more likely, which may result in a decline in the value of the Fund's holdings. Inflation rates may change frequently and drastically as a result of various factors, including unexpected shifts in the domestic or global economy (or expectations that such policies will change), and the Fund's investments may not keep pace with inflation, which may result in losses to Fund investors. Fiscal, economic, monetary or other governmental policies or measures have in the past, and may in the future, cause or exacerbate risks associated with interest rates, including changes in interest rates. Generally, securities issued in emerging markets are subject to a greater risk of inflationary or deflationary forces, and more developed markets are better able to use monetary policy to normalize markets.
Prudentials Gibraltar Fund | Investment Style Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Investment Style Risk. Securities held by the Fund as a result of a particular investment style, such as growth or value, tend to perform differently (i.e., better or worse than other segments of, or the overall, stock market) depending on market and economic conditions and investor sentiment. At times when the investment style is out of favor, the Fund may underperform other funds that invest in similar asset classes but use different investment styles.
Prudentials Gibraltar Fund | Large Company Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Large Company Risk. Large-capitalization stocks as a group could fall out of favor with the market, causing the Fund to underperform investments that focus on small- or medium-capitalization stocks. Larger, more established companies may be slow to respond to challenges and may grow more slowly than smaller companies. Investments in securities of certain issuers with the largest market capitalizations can result in greater investment exposure to a limited number of issuers and sectors, primarily the technology sector, which can result in greater losses in the event of a market downturn or deteriorating fundamentals in those issuers or sectors.
Prudentials Gibraltar Fund | Liquidity And Valuation Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Liquidity and Valuation Risk. The Fund may hold one or more securities for which there are no or few buyers and sellers or the securities are subject to limitations on transfer.  The Fund may be unable to sell those portfolio holdings at the desired time or price and may have difficulty determining the value of such securities for the purpose of determining the Fund’s net asset value.  In such cases, investments owned by the Fund may be valued at fair value pursuant to policies and procedures adopted and implemented by the investment manager. No assurance can be given that the fair value prices accurately reflect the value of the security. The Fund is subject to a liquidity risk management program, which limits the ability of the Fund to invest in illiquid investments.
Prudentials Gibraltar Fund | Market And Management Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Market and Management Risk. Markets in which the Fund invests may experience volatility and go down in value, and possibly sharply and unpredictably. Investment techniques, risk analyses, and investment strategies, which may include quantitative models or methods, used by a subadviser in making investment decisions for the Fund are subject to human error and may not produce the intended or desired results. While a Portfolio Manager or Subadviser(s) may make efforts to control the risks associated with market changes, and may attempt to identify changes as they occur, market environment changes can be sudden and extreme. The value of the Fund’s investments may be negatively affected by the occurrence of domestic or global events, including war, terrorism, significant or unexpected failures, near-failures or credit downgrades of key institutions, unexpected changes in the prices of key commodities, government actions, environmental or natural disasters, sanctions, cybersecurity events, supply chain disruptions, political or civil instability, and public health emergencies, among others. Such events may reduce consumer demand or economic output, result in market closures, travel restrictions or quarantines, and have a significant adverse impact on the economy. These events can adversely affect the liquidity and volatility of investments held by the Portfolio, and there is no guarantee that the investment objective of the Fund will be achieved. In periods of market volatility and/or declines, the Portfolio may experience high levels of shareholder redemptions, and may have to sell securities at times when it would otherwise not do so, and at unfavorable prices.
Prudentials Gibraltar Fund | Mid Sized Company Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Mid-Sized Company Risk. The shares of mid-sized companies tend to trade less frequently than those of larger, more established companies, which can have an adverse effect on the pricing and volatility of these securities and on the Fund’s ability to sell the securities.
Prudentials Gibraltar Fund | Regulatory Risk [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Regulatory Risk. The Fund is subject to a variety of laws and regulations that govern its operations. The Fund is subject to regulation by the Securities and Exchange Commission (the SEC). Similarly, the businesses and other issuers of the securities and other instruments in which the Fund invests are also subject to considerable regulation. Changes in laws and regulations may materially impact the Fund, a security, business, sector, or market.
Prudentials Gibraltar Fund | PRUDENTIALS GIBRALTAR FUND
Risk Return Abstract	rr_RiskReturnAbstract
Management Fees	rr_ManagementFeesOverAssets	0.55%
Distribution (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.09%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.64%
1 Year	rr_ExpenseExampleYear01	$ 65
3 Years	rr_ExpenseExampleYear03	205
5 Years	rr_ExpenseExampleYear05	357
10 Years	rr_ExpenseExampleYear10	798
1 Year	rr_ExpenseExampleNoRedemptionYear01	65
3 Years	rr_ExpenseExampleNoRedemptionYear03	205
5 Years	rr_ExpenseExampleNoRedemptionYear05	357
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 798
2015	rr_AnnualReturn2015	12.65%
2016	rr_AnnualReturn2016	0.39%
2017	rr_AnnualReturn2017	36.24%
2018	rr_AnnualReturn2018	4.61%
2019	rr_AnnualReturn2019	33.13%
2020	rr_AnnualReturn2020	42.73%
2021	rr_AnnualReturn2021	15.26%
2022	rr_AnnualReturn2022	(35.82%)
2023	rr_AnnualReturn2023	48.88%
2024	rr_AnnualReturn2024	21.49%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00pt;">Best Quarter:</span>
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2020
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	28.63%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.00pt;">Worst Quarter:</span>
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Jun. 30, 2022
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(23.99%)
One Year	rr_AverageAnnualReturnYear01	21.49%
Five Years	rr_AverageAnnualReturnYear05	13.81%
Ten Years	rr_AverageAnnualReturnYear10	15.15%
Prudentials Gibraltar Fund | S&P 500 Index
Risk Return Abstract	rr_RiskReturnAbstract
One Year	rr_AverageAnnualReturnYear01	25.02%
Five Years	rr_AverageAnnualReturnYear05	14.53%
Ten Years	rr_AverageAnnualReturnYear10	13.10%