T. Rowe Price Large Cap Value Portfolio Investment Strategy - T. Rowe Price Large Cap Value 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]	T. Rowe Price Associates, Inc. (“T. Rowe Price” or “Subadviser”), subadviser to the Portfolio, invests, under normal circumstances, at least 80% of the Portfolio’s net assets in securities of large-cap companies the portfolio manager regards as undervalued. The Portfolio defines a large-cap company as having a market cap that is either (i) larger than the current median market cap of companies in the Russell 1000® Value Index or (ii) larger than the three-year average median market cap of companies in the index based on the previous three December 31 dates. The Russell 1000® Value Index is a widely used benchmark of the largest domestic value stocks. As of December 31, 2025, the median market cap for the Russell 1000® Value Index was approximately $14.0 billion. The market capitalization limits will vary with market fluctuations. The market capitalization of the companies owned by the Portfolio and the Russell index changes over time; the Portfolio will not automatically sell or cease to purchase stock of a company it owns just because the company’s market capitalization falls below these levels. The Portfolio may also purchase stocks of smaller companies. The Portfolio may, from time to time, emphasize one or more sectors. The portfolio managers seek to identify companies that appear to be undervalued by various measures, and may be temporarily out of favor, but have good prospects for capital appreciation. In selecting investments, the portfolio managers generally look for one or more of the following: ■low price/earnings, price/book value, price/sales, or price/cash flow ratios relative to the broader equity market, a company’s peers, or a company’s own historical norm; ■low stock price relative to a company’s underlying asset values; ■companies that may benefit from restructuring activity; and/or ■a sound balance sheet and other positive financial characteristics. In pursuing its investment objectives, the Portfolio has the discretion to deviate from its normal investment criteria, as previously described, and purchase securities that the portfolio managers believe will provide an opportunity for substantial appreciation. These situations might arise when the portfolio managers believe a security could increase in value for a variety of reasons, including an extraordinary corporate event, a new product introduction or innovation, a favorable competitive development, or a change in management. While the Portfolio will invest most of its assets in U.S. common stocks, the Portfolio may invest in other securities, including foreign stocks, in keeping with the Portfolio’s objectives. The Portfolio may invest up to 25% of its assets in foreign securities. The Portfolio may sell securities for a variety of reasons, such as to secure gains, limit losses or re-deploy assets into more promising opportunities.

T. Rowe Price Large Cap Value Portfolio Investment Strategy - T. Rowe Price Large Cap Value 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]

T. Rowe Price Associates, Inc. (“T. Rowe Price” or “Subadviser”), subadviser to the Portfolio, invests, under normal circumstances, at least 80% of the Portfolio’s net assets in securities of large-cap companies the portfolio manager regards as undervalued. The Portfolio defines a large-cap company as having a market cap that is either (i) larger than the current median market cap of companies in the Russell 1000® Value Index or (ii) larger than the three-year average median market cap of companies in the index based on the previous three December 31 dates. The Russell 1000® Value Index is a widely used benchmark of the largest domestic value stocks. As of December 31, 2025, the median market cap for the Russell 1000® Value Index was approximately $14.0 billion. The market capitalization limits will vary with market fluctuations. The market capitalization of the companies owned by the Portfolio and the Russell index changes over time; the Portfolio will not automatically sell or cease to purchase stock of a company it owns just because the company’s market capitalization falls below these levels. The Portfolio may also purchase stocks of smaller companies. The Portfolio may, from time to time, emphasize one or more sectors. The portfolio managers seek to identify companies that appear to be undervalued by various measures, and may be temporarily out of favor, but have good prospects for capital appreciation. In selecting investments, the portfolio managers generally look for one or more of the following: ■low price/earnings, price/book value, price/sales, or price/cash flow ratios relative to the broader equity market, a company’s peers, or a company’s own historical norm; ■low stock price relative to a company’s underlying asset values; ■companies that may benefit from restructuring activity; and/or ■a sound balance sheet and other positive financial characteristics. In pursuing its investment objectives, the Portfolio has the discretion to deviate from its normal investment criteria, as previously described, and purchase securities that the portfolio managers believe will provide an opportunity for substantial appreciation. These situations might arise when the portfolio managers believe a security could increase in value for a variety of reasons, including an extraordinary corporate event, a new product introduction or innovation, a favorable competitive development, or a change in management. While the Portfolio will invest most of its assets in U.S. common stocks, the Portfolio may invest in other securities, including foreign stocks, in keeping with the Portfolio’s objectives. The Portfolio may invest up to 25% of its assets in foreign securities. The Portfolio may sell securities for a variety of reasons, such as to secure gains, limit losses or re-deploy assets into more promising opportunities.