| Form N-CSR Cover | 6 Months Ended |
| Jun. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Prudential’s Gibraltar Fund, Inc. |
| Entity Central Index Key | 0000080946 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| Shareholder Report | 6 Months Ended |
| Jun. 30, 2024 USD ($) Holdings | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | Prudential’s Gibraltar Fund, Inc. |
| Entity Central Index Key | 0000080946 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Jun. 30, 2024 |
| C000027675 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | Prudential’s Gibraltar Fund, Inc. |
| Class Name | Prudential’s Gibraltar Fund |
| No Trading Symbol Flag | true |
| Annual or Semi-Annual Statement [Text Block] | This semiannual shareholder report 2024 to June 30, 2024. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at www.prudential.com/variableinsuranceportfolios . You can also request this information by contacting us at (800) 346-3778. |
| Additional Information Phone Number | (800) 346-3778 |
| Additional Information Website | www.prudential.com/variableinsuranceportfolios |
| Expenses [Text Block] | WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? (Based on a hypothetical $10,000 investment) Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Prudential's Gibraltar Fund, Inc. $34 0.64% |
| Expenses Paid, Amount | $ 34 |
| Expense Ratio, Percent | 0.64% |
| Net Assets | $ 169,218,847 |
| Holdings Count | Holdings | 38 |
| Investment Company, Portfolio Turnover | 9% |
| Additional Fund Statistics [Text Block] | WHAT ARE SOME KEY FUND STATISTICS AS OF 6/30/2024? Fund’s net assets $ 169,218,847 Number of fund holdings 38 Portfolio turnover rate for the period 9% |
| Holdings [Text Block] | WHAT ARE SOME CHARACTERISTICS OF THE FUND’S HOLDINGS AS OF 6/30/2024? Industry Classification % of Net Assets Software 14.7% Semiconductors & Semiconductor Equipment 12.3% Interactive Media & Services 11.0% Pharmaceuticals 9.6% Broadline Retail 8.0% Financial Services 7.5% Consumer Staples Distribution & Retail 5.9% Technology Hardware, Storage & Peripherals 5.6% Health Care Equipment & Supplies 3.1% Hotels, Restaurants & Leisure 3.0% Specialty Retail 3.0% Automobiles 2.3% Affiliated Mutual Funds 2.2% Industry Classification % of Net Assets Capital Markets 2.1% Ground Transportation 1.8% Biotechnology 1.7% Entertainment 1.5% IT Services 1.1% Electrical Equipment 0.8% Textiles, Apparel & Luxury Goods 0.7% Aerospace & Defense 0.5% 98.4% Other assets in excess of liabilities 1.6% 100.0% |
| Shareholder Report, Holdings (Details) - C000027675 [Member] | Jun. 30, 2024 |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 98.40% |
| Software [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 14.70% |
| Semiconductors Semiconductor Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.30% |
| Interactive Media Services [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11% |
| Pharmaceuticals [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.60% |
| Broadline Retail [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8% |
| Financial Services Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Consumer Staples Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Healthcare Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.10% |
| Hotels Restaurants Leisure [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Specialty Retail [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Automobiles Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Affiliated Mutual Funds [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Capital Markets [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Ground Transportation [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.80% |
| Biotechnology [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.70% |
| Entertainment Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Information Technology Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Electrical Equipment [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Textiles Apparel Luxury Goods [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Aerospace Sector [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Other assets in excess of liabilities [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Total [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 100% |
