v3.26.1
Investment Strategy
Dec. 31, 2025
BlackRock Advantage Large Cap Core Portfolio  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
Under normal circumstances, the Fund seeks to invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in large cap equity securities and derivatives that have similar economic
characteristics to such securities. Investments in derivatives are counted toward the Fund’s 80% policy to the extent that they provide investment exposure to the securities included within that policy or to one or more market risk factors associated with such securities. For purposes of the Fund’s 80% policy, large cap equity securities are equity securities that at the time of purchase have a market capitalization within the range of companies included in the Russell 1000® Index (the “Russell 1000 Index”). The Fund primarily intends to invest in equity securities, which include common stock and preferred stock, or other financial instruments that are components of, or have characteristics similar to, the securities included in the Russell 1000 Index. The Russell 1000 Index is a capitalization-weighted index of equity securities from a broad range of industries chosen for market size, liquidity and industry group representation. The Fund primarily seeks to buy common stock and may also invest in preferred stock and convertible securities. From time to time, the Fund may invest in shares of companies through “new issues” or initial public offerings (“IPOs”).
The Fund may use derivatives, including options, futures, swaps (including, but not limited to, total return swaps, some of which may be referred to as contracts for difference) and forward contracts, both to seek to increase the return of the Fund and to hedge (or protect) the value of its assets against adverse movements in currency exchange rates, interest rates and movements in the securities markets. In order to manage cash flows into or out of the Fund effectively, the Fund may buy and sell financial futures contracts or options on such contracts. Derivatives are financial instruments whose value is derived from another security, a currency or an index, including but not limited to the Russell 1000 Index. The use of options, futures, swaps and forward contracts can be effective in protecting or enhancing the value of the Fund’s assets.
The Fund may seek to provide exposure to the investment returns of real assets that trade in the commodity markets through investment in commodity-linked derivative instruments and investment vehicles such as exchange-traded funds that invest exclusively in commodities and are designed to provide this exposure without direct investment in physical commodities.
The Fund seeks to pursue its investment objective by investing in large cap securities in a disciplined manner, by using proprietary return forecast models that incorporate quantitative analysis. These forecast models are designed to identify aspects of mispricing across stocks which the Fund can seek to capture by over- and under-weighting particular equities while seeking to control incremental risk. BlackRock then constructs and rebalances the portfolio by integrating its investment insights with the model-based optimization process.
BlackRock Balanced Portfolio  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
The Fund invests in a combination of equity securities, fixed-income securities and derivatives. The proportion the Fund invests in each category at any given time depends on Fund management’s view of how attractive that category appears relative to the others. The Fund intends to invest at least 25% of its assets in equity securities and at least 25% of its assets in senior fixed income securities, such as U.S. government debt securities, corporate debt securities, and mortgage-backed and asset-backed securities.
With respect to the Fund’s equity investments, the Fund primarily intends to invest in equity securities or other financial instruments that are components of, or have characteristics similar to, the securities included in the MSCI All Country World Index (the “ACWI”). The ACWI is a capitalization-weighted index from a broad range of industries chosen for market size, liquidity and industry group representation. In selecting equity investments, the Fund primarily uses proprietary return forecast models that incorporate quantitative analysis. Equity securities include common stock and preferred stock. The Fund primarily seeks to buy common stock and may also invest in preferred stock. From time to time, the Fund may invest in shares of companies through “new issues” or initial public offerings (“IPOs”). The Fund may also purchase convertible securities. The Fund may invest in securities of both U.S. or non‑U.S. issuers without limit, which can be U.S. dollar based or non‑U.S. dollar based and may be currency hedged or unhedged. The Fund may invest in securities of companies of any market capitalization.
With respect to the Fund’s fixed-income investments, the Fund will invest primarily using model-based asset allocation and security selection models. The Fund may invest in obligations issued or guaranteed by the U.S. Government, its agencies or instrumentalities; mortgage-backed securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, including U.S. agency mortgage pass-through securities; commercial mortgage-backed securities; mortgage to‑be‑announced (“TBA”) securities; debt obligations of U.S. issuers, including corporate bonds; municipal securities; asset-backed securities; and U.S.-registered dollar-denominated debt obligations of foreign issuers. The Fund may invest in bonds issued by companies located in countries other than the United States, including companies in emerging markets. These securities may have all types of interest rate payment and reset terms, including fixed rate, adjustable rate, floating rate, zero coupon, contingent, deferred, payment in kind and auction rate features. The Fund seeks to invest a substantial portion of its assets in U.S.-registered, dollar-denominated bonds. The Fund may invest up to 10% of its assets in securities rated below investment grade (“high yield” or “junk” bonds). The Fund may invest in bonds of any maturity or duration.
The Fund may invest a significant portion of its fixed income holdings in U.S. agency mortgage pass-through securities, which are securities issued by entities such as the Government National Mortgage Association (“GNMA”) and the Federal National Mortgage Association that are backed by pools of mortgages. Most transactions in mortgage pass-through securities occur through standardized contracts for future delivery in which the exact mortgage-backed securities to be delivered are not specified until a few days prior to settlement. The Fund expects to enter into such contracts on a regular basis.
The Fund may use derivatives, including options, futures, swaps (including, but not limited to, total return swaps) forward contracts and various other instruments, both to seek to increase the return of the Fund and to hedge (or protect) the value of its assets against adverse movements in currency exchange rates, interest rates and movements in the securities markets. The Fund may also invest in indexed and inverse securities.
BlackRock Capital Appreciation Portfolio  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
The Fund will seek to achieve its investment objective by investing primarily in a diversified portfolio consisting primarily of common stock of U.S. companies that Fund management believes have exhibited above-average growth rates in earnings over the long term. In other words, Fund management tries to choose investments that will increase in value over the long term.
The Fund will generally invest at least 65% of its total assets in the following equity securities:
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Common stock;
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Convertible preferred stock; and
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Rights to subscribe to common stock.
Of these securities, the Fund generally seeks to invest primarily in common stock. The Fund may also purchase securities convertible into common stock.
The Fund may invest in companies of any size but emphasizes investments in companies that have large stock market capitalizations (currently, approximately $2 billion or more). The Fund may invest across different market sectors and industries, and at times may have material investment exposure to one or more sectors or industries.
Convertible securities generally are debt securities or preferred stock that may be converted into common stock. Convertible securities typically pay current income as either interest (debt security convertibles) or dividends (preferred stock). A convertible’s value usually reflects both the stream of current income payments and the market value of the underlying common stock. The Fund may purchase securities pursuant to the exercise of subscription rights, which allow an issuer’s existing shareholders to purchase additional common stock at a price substantially below the market price of the shares.
BlackRock Global Allocation Portfolio  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
The Fund invests in a portfolio of equity, debt and money market securities. Generally, the Fund’s portfolio will include both equity and debt securities. Equity securities include common stock, preferred stock, rights and warrants or securities or other instruments whose price is linked to the value of common stock. At any given time, however, the Fund may emphasize either debt securities or equity securities. In selecting equity investments, the Fund mainly seeks securities that Fund management believes are undervalued. The Fund may buy debt securities of varying maturities, debt securities paying a fixed or fluctuating rate of interest, and debt securities of any kind, including, by way of example, securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities, by foreign governments or international agencies or supranational entities, or by domestic or foreign private issuers, debt securities convertible into equity securities, inflation-indexed bonds, structured notes, credit-linked notes, loan assignments and loan participations. In addition, the Fund may invest up to 35% of its total assets in “junk bonds,” corporate loans and distressed securities. The Fund may also invest in real estate investment trusts (“REITs”) and securities related to real assets (like real estate- or precious metals-related securities) such as stock, bonds or convertible bonds issued by REITs or companies that mine precious metals.
The Fund may also purchase convertible securities.
When choosing investments, Fund management considers various factors, including opportunities for equity or debt investments to increase in value, expected dividends and interest rates. The Fund generally seeks diversification across markets, industries and issuers as one of its strategies to reduce volatility. The Fund has no geographic limits on where it may invest. This flexibility allows Fund management to look for investments in markets around the world, including emerging markets, that it believes will provide the best asset allocation to meet the Fund’s objective. The Fund may invest in the securities of companies of any market capitalization.
Generally, the Fund may invest in the securities of corporate and governmental issuers located anywhere in the world. The Fund may emphasize foreign securities when Fund management expects these investments to outperform U.S. securities. When choosing investment markets, Fund management considers various factors, including economic and political conditions, potential for economic growth and possible changes in currency exchange rates. In addition to investing in foreign securities, the Fund actively manages its exposure to foreign currencies through the use of forward currency contracts and other currency derivatives. The Fund may own foreign cash equivalents or foreign bank deposits as part of the Fund’s investment strategy. The Fund will also invest in non‑U.S. currencies. The Fund may underweight or overweight a currency based on the Fund management team’s outlook.
Under normal circumstances, the Fund will continue to allocate a substantial amount (approximately 40% or more — unless market conditions are not deemed favorable by BlackRock, in which case the Fund would invest at least 30%) of its total assets in securities of (i) foreign government issuers, (ii) issuers organized or located outside the U.S., (iii) issuers which primarily trade in a market located outside the U.S., or (iv) issuers doing a substantial amount of business outside the U.S., which the Fund considers to be companies that derive at least 50% of their revenue or profits from business outside the U.S. or have at least 50% of their sales or assets outside the U.S. The Fund will allocate its assets among various regions and countries including the United States (but in no less than three different countries). For temporary defensive purposes the Fund may deviate very substantially from the allocation described above.
The Fund may use derivatives, including options, futures, swaps (including, but not limited to, total return swaps that may be referred to as contracts for difference) and forward contracts both to seek to increase the return of the Fund and to hedge (or protect) the value of its assets against adverse movements in currency exchange rates, interest rates and movements in the securities markets. The Fund may invest in indexed securities and inverse securities.
The Fund may seek to provide exposure to the investment returns of real assets that trade in the commodity markets through investment in commodity-linked derivative instruments and investment vehicles such as exchange-traded funds that invest exclusively in commodities and are designed to provide this exposure without direct investment in physical commodities. The Fund may also gain exposure to commodity markets by investing up to 25% of its total assets in BlackRock Cayman Global Allocation Portfolio I, Ltd. (the “Subsidiary”), a wholly owned subsidiary of the Fund formed in the Cayman Islands, which invests primarily in commodity-related instruments. The Subsidiary may also hold cash and invest in other instruments, including fixed income securities, either as investments or to serve as margin or collateral for the Subsidiary’s derivative positions. The Subsidiary (unlike the Fund) may invest without limitation in commodity-related instruments. However, the Subsidiary is otherwise subject to the same fundamental, non‑fundamental and certain other investment restrictions as the Fund.
BlackRock Government Money Market Portfolio  
Prospectus [Line Items]  
Strategy [Heading] Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]
The Fund invests at least 99.5% of its total assets in cash, U.S. Treasury bills, notes and other obligations issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, and repurchase agreements secured by such obligations or cash. The Fund invests in securities maturing in 397 days or less (with certain exceptions) and the portfolio will have a dollar-weighted average maturity of 60 days or less and a dollar-weighted average life of 120 days or less. The Fund may invest in variable and floating rate instruments, and transact in securities on a when-issued, delayed delivery or forward commitment basis.
The Fund will invest, under normal circumstances, at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in U.S. Treasury bills, notes and other obligations issued or guaranteed as to principal and interest by the U.S. Government, its agencies or instrumentalities, and repurchase agreements secured by such
obligations. This policy is a non‑fundamental policy of the Fund, and the Fund will not change the policy without providing shareholders with at least 60 days’ prior notice of any change in the policy.
The securities purchased by the Fund are subject to the quality, diversification, and other requirements of Rule 2a‑7 under the Investment Company Act of 1940, as amended (the “Investment Company Act”), and other rules of the Securities and Exchange Commission.