PIMCO Inflation Protected Bond Portfolio Investment Strategy - PIMCO Inflation Protected Bond Portfolio	Dec. 31, 2025
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Times New Roman;font-size:11.5pt;font-weight:bold;">Principal Investment Strategies</span>
Strategy Narrative [Text Block]	Pacific Investment Management Company LLC (“PIMCO” or “Subadviser”), subadviser to the Portfolio, invests, under normal circumstances, at least 80% of the Portfolio’s net assets in inflation-indexed bonds of varying maturities issued by the U.S. and non-U.S. governments, their agencies or instrumentalities, and corporations, which may be represented by forwards or derivatives such as options, futures contracts or swap agreements. Inflation-indexed bonds are fixed income securities that are structured to provide protection against inflation. The value of the bond’s principal or the interest income paid on the bond is adjusted to track changes in an official inflation measure. The U.S. Treasury uses the Consumer Price Index for All Urban Consumers (“CPI-U”) as the inflation measure. For more information about the CPI-U, please see “Investment Strategies and Risks” in the Statement of Additional Information. Inflation-indexed bonds issued by a foreign government are generally adjusted to reflect a comparable inflation index, calculated by that government. The effective portfolio duration of the Portfolio normally will vary within (plus or minus) three years of the duration of the Bloomberg U.S. TIPS Index (the “Index”), as calculated by PIMCO. PIMCO believes that no single risk should dominate returns and, as a result, emphasizes diversification of risks through the use of a wide range of strategies when constructing the investment portfolio. PIMCO seeks to add value through the use of “top-down” strategies such as exposure to duration, inflation positioning, yield curve positioning, country rotation and sector rotation. In addition, PIMCO employs “bottom-up” strategies that involve analysis and selection of specific securities and that try to take advantage of inflation patterns, unexpected changes in inflation levels and inflation volatility. By combining “top-down” and “bottom-up” strategies, PIMCO seeks to provide excess real returns in relation to the Index while maintaining a risk profile similar to that of the Index. The Portfolio’s principal investments may include inflation-indexed bonds and securities issued or guaranteed by the U.S. Government, its agencies or government-sponsored enterprises; corporate debt securities of U.S. and non-U.S. issuers, including convertible securities and corporate commercial paper; mortgage-backed and other asset-backed securities, including collateralized loan obligations; inflation-indexed bonds issued both by governments and corporations; structured notes, including hybrid or “indexed” securities and event-linked bonds; bank capital and trust preferred securities; loan participations and assignments; delayed funding loans and revolving credit facilities; bank certificates of deposit, fixed time deposits and bankers’ acceptances; repurchase agreements and reverse repurchase agreements; securities issued pursuant to Rule 144A under the Securities Act of 1933; debt securities issued by states or local governments and their agencies, authorities and other government-sponsored enterprises; obligations of non-U.S. governments or their subdivisions, agencies and government-sponsored enterprises; and obligations of international agencies or supranational entities. The Portfolio may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales to a significant extent. The Portfolio invests primarily in investment grade debt securities, but may invest up to 10% of its total assets in high yield securities (commonly called “junk bonds”) rated B or higher by Moody’s Ratings, or equivalently rated by Standard & Poor’s Ratings Services or Fitch, Inc., or, if unrated, determined by PIMCO to be of comparable quality (except that within such 10% limitation, the Portfolio may invest in mortgage-related securities rated below B). The Portfolio also may invest up to 30% of its total assets in securities denominated in foreign currencies, and may invest beyond this limit in U.S. dollar denominated securities of foreign issuers. The Portfolio may invest up to 10% of its total assets in securities and instruments that are economically tied to emerging market countries. Foreign currency exposure (from non-U.S. dollar denominated securities or currencies) normally will be limited to 20% of the Portfolio’s total assets. The Portfolio may also invest up to 10% of its total assets in preferred stocks. The Portfolio may invest all of its assets in derivative instruments, such as options, futures contracts or swap agreements, or in mortgage- or asset-backed securities. The Portfolio may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques such as buy backs or dollar rolls.

PIMCO Inflation Protected Bond Portfolio Investment Strategy - PIMCO Inflation Protected Bond Portfolio

Dec. 31, 2025

<span style="color:#000000;font-family:Times New Roman;font-size:11.5pt;font-weight:bold;">Principal Investment Strategies</span>

Strategy Narrative [Text Block]

Pacific Investment Management Company LLC (“PIMCO” or “Subadviser”), subadviser to the Portfolio, invests, under normal circumstances, at least 80% of the Portfolio’s net assets in inflation-indexed bonds of varying maturities issued by the U.S. and non-U.S. governments, their agencies or instrumentalities, and corporations, which may be represented by forwards or derivatives such as options, futures contracts or swap agreements. Inflation-indexed bonds are fixed income securities that are structured to provide protection against inflation. The value of the bond’s principal or the interest income paid on the bond is adjusted to track changes in an official inflation measure. The U.S. Treasury uses the Consumer Price Index for All Urban Consumers (“CPI-U”) as the inflation measure. For more information about the CPI-U, please see “Investment Strategies and Risks” in the Statement of Additional Information. Inflation-indexed bonds issued by a foreign government are generally adjusted to reflect a comparable inflation index, calculated by that government. The effective portfolio duration of the Portfolio normally will vary within (plus or minus) three years of the duration of the Bloomberg U.S. TIPS Index (the “Index”), as calculated by PIMCO. PIMCO believes that no single risk should dominate returns and, as a result, emphasizes diversification of risks through the use of a wide range of strategies when constructing the investment portfolio. PIMCO seeks to add value through the use of “top-down” strategies such as exposure to duration, inflation positioning, yield curve positioning, country rotation and sector rotation. In addition, PIMCO employs “bottom-up” strategies that involve analysis and selection of specific securities and that try to take advantage of inflation patterns, unexpected changes in inflation levels and inflation volatility. By combining “top-down” and “bottom-up” strategies, PIMCO seeks to provide excess real returns in relation to the Index while maintaining a risk profile similar to that of the Index. The Portfolio’s principal investments may include inflation-indexed bonds and securities issued or guaranteed by the U.S. Government, its agencies or government-sponsored enterprises; corporate debt securities of U.S. and non-U.S. issuers, including convertible securities and corporate commercial paper; mortgage-backed and other asset-backed securities, including collateralized loan obligations; inflation-indexed bonds issued both by governments and corporations; structured notes, including hybrid or “indexed” securities and event-linked bonds; bank capital and trust preferred securities; loan participations and assignments; delayed funding loans and revolving credit facilities; bank certificates of deposit, fixed time deposits and bankers’ acceptances; repurchase agreements and reverse repurchase agreements; securities issued pursuant to Rule 144A under the Securities Act of 1933; debt securities issued by states or local governments and their agencies, authorities and other government-sponsored enterprises; obligations of non-U.S. governments or their subdivisions, agencies and government-sponsored enterprises; and obligations of international agencies or supranational entities. The Portfolio may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales to a significant extent. The Portfolio invests primarily in investment grade debt securities, but may invest up to 10% of its total assets in high yield securities (commonly called “junk bonds”) rated B or higher by Moody’s Ratings, or equivalently rated by Standard & Poor’s Ratings Services or Fitch, Inc., or, if unrated, determined by PIMCO to be of comparable quality (except that within such 10% limitation, the Portfolio may invest in mortgage-related securities rated below B). The Portfolio also may invest up to 30% of its total assets in securities denominated in foreign currencies, and may invest beyond this limit in U.S. dollar denominated securities of foreign issuers. The Portfolio may invest up to 10% of its total assets in securities and instruments that are economically tied to emerging market countries. Foreign currency exposure (from non-U.S. dollar denominated securities or currencies) normally will be limited to 20% of the Portfolio’s total assets. The Portfolio may also invest up to 10% of its total assets in preferred stocks. The Portfolio may invest all of its assets in derivative instruments, such as options, futures contracts or swap agreements, or in mortgage- or asset-backed securities. The Portfolio may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques such as buy backs or dollar rolls.