Net Assets Investment Company, Portfolio Turnover No Trading Symbol Flag C000027675 [Member] PRUDENTIAL'S GIBRALTAR FUND, INC Aerospace Sector [Member] Affiliated Mutual Fund - Short-Term Investment (4.2% represents investments purchased with collateral from securities on loan) [Member] Automobiles [Member] Biotechnology [Member] Broadline Retail [Member] Capital Markets [Member] Diversified Telecommunication Services [Member] Electric Utilities [Member] Electronic Equipment, Instruments And Components [Member] Electronic Equipment, Instruments & Components [Member] Entertainment Sector [Member] Financial Services Sector [Member] Ground Transportation [Member] Healthcare Sector [Member] Hotels, Restaurants And Leisure [Member] Hotels, Restaurants & Leisure [Member] Interactive Media And Services [Member] Interactive Media & Services [Member] Liabilities in excess of other assets [Member] Pharmaceuticals [Member] Semiconductors And Semiconductor Equipment [Member] Semiconductors & Semiconductor Equipment [Member] Software [Member] Specialty Retail [Member] Technology Sector [Member] Total [Member] Investment Type [Axis]