Invesco Small Cap Growth Portfolio Investment Strategy - Invesco Small Cap Growth 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]	Invesco Advisers, Inc. (“Invesco” or “Subadviser”), subadviser to the Portfolio, invests, under normal circumstances, at least 80% of the Portfolio’s net assets in securities of small-cap companies. In complying with this 80% investment requirement, the Portfolio will invest primarily in equity securities. The Portfolio considers a company to be a small-cap company if it has a market capitalization, at the time of purchase, no larger than the market capitalization of the largest capitalized issuer included in the Russell 2000® Index during the most recent 11-month period (based on month-end data) plus the most recent data during the current month. The Portfolio may invest up to 20% of its assets in equity securities of issuers that have market capitalizations, at the time of purchase, in other market capitalization ranges. The Portfolio may invest in real estate investment trusts. The Portfolio may also invest up to 25% of its total assets in foreign securities, including both developing and developed markets. For risk management purposes, the Portfolio may hold a portion of its assets in cash or cash equivalents, including money market instruments. The Portfolio may, from time to time, emphasize one or more sectors. The Portfolio invests primarily in securities that are considered by the Portfolio’s portfolio managers to have potential for earnings or revenue growth. In selecting investments, the portfolio managers utilize a disciplined portfolio construction process that aligns the Portfolio with the Russell 2000® Growth Index, which the portfolio managers believe represents the small-cap growth asset class. The security selection process is based on a three-step process that includes fundamental, valuation and timeliness analysis. ■Fundamental analysis involves building a series of financial models, as well as conducting in-depth interviews with company management. The goal is to find high quality, fundamentally sound companies operating in an attractive industry. ■Valuation analysis focuses on identifying attractively valued securities given their growth potential over a one- to two-year horizon. ■Timeliness analysis is used to help identify the “timeliness” of a purchase. In this step, relative price strength, trading volume characteristics, and trend analysis are reviewed for signs of deterioration. If a stock shows signs of deterioration, it will not be considered as a candidate for the Portfolio. The portfolio managers consider selling a security if the investment thesis for owning the security is no longer valid, the stock reaches its price target or timeliness factors indicate that the risk/return characteristics of the stock as viewed in the market are no longer attractive.

Invesco Small Cap Growth Portfolio Investment Strategy - Invesco Small Cap Growth 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]

Invesco Advisers, Inc. (“Invesco” or “Subadviser”), subadviser to the Portfolio, invests, under normal circumstances, at least 80% of the Portfolio’s net assets in securities of small-cap companies. In complying with this 80% investment requirement, the Portfolio will invest primarily in equity securities. The Portfolio considers a company to be a small-cap company if it has a market capitalization, at the time of purchase, no larger than the market capitalization of the largest capitalized issuer included in the Russell 2000® Index during the most recent 11-month period (based on month-end data) plus the most recent data during the current month. The Portfolio may invest up to 20% of its assets in equity securities of issuers that have market capitalizations, at the time of purchase, in other market capitalization ranges. The Portfolio may invest in real estate investment trusts. The Portfolio may also invest up to 25% of its total assets in foreign securities, including both developing and developed markets. For risk management purposes, the Portfolio may hold a portion of its assets in cash or cash equivalents, including money market instruments. The Portfolio may, from time to time, emphasize one or more sectors. The Portfolio invests primarily in securities that are considered by the Portfolio’s portfolio managers to have potential for earnings or revenue growth. In selecting investments, the portfolio managers utilize a disciplined portfolio construction process that aligns the Portfolio with the Russell 2000® Growth Index, which the portfolio managers believe represents the small-cap growth asset class. The security selection process is based on a three-step process that includes fundamental, valuation and timeliness analysis. ■Fundamental analysis involves building a series of financial models, as well as conducting in-depth interviews with company management. The goal is to find high quality, fundamentally sound companies operating in an attractive industry. ■Valuation analysis focuses on identifying attractively valued securities given their growth potential over a one- to two-year horizon. ■Timeliness analysis is used to help identify the “timeliness” of a purchase. In this step, relative price strength, trading volume characteristics, and trend analysis are reviewed for signs of deterioration. If a stock shows signs of deterioration, it will not be considered as a candidate for the Portfolio. The portfolio managers consider selling a security if the investment thesis for owning the security is no longer valid, the stock reaches its price target or timeliness factors indicate that the risk/return characteristics of the stock as viewed in the market are no longer attractive.