Small Cap Value Fund Investment Strategy - Small Cap Value Fund	May 31, 2026
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:12pt;font-weight:bold;">Principal Investment Strategies of the Fund</span>
Strategy Narrative [Text Block]	The Fund invests, under normal circumstances, at least 80% of its net assets in securities of small-cap value companies. The Fund invests primarily in equity securities. For purposes of the Fund’s 80% investment policy, a company is considered to be a value company if it: (i) issues securities that are represented in a third-party value-style index or that are classified as a value company by a third-party vendor; or (ii) meets a relevant equity market measurement in at least one “value metric” similar to those commonly used by third-party index providers or third-party vendors in value classifications, such as earnings growth, price-to-earnings or sales growth, among others.A company will be considered a small-cap company if its market capitalization, at time of purchase, is equal to or less than the largest company in the Russell 2000® Value Index during the most recent 12-month period. As of August 31, 2026, the median stock by market capitalization in the Index was approximately $0.930 million, and the largest stock was approximately $10.761 billion. The size of the companies in the Index changes with market conditions and the composition of the Index. The subadvisers use a value-oriented approach. Within the universe of value companies, companies will be selected based upon valuation characteristics such as price-to-cash flow ratios which are at a discount to market averages. Although the Fund primarily invests in domestic issuers, the Fund is authorized to invest up to 25% of its assets in the securities of foreign issuers. In order to generate additional income, the Fund may lend portfolio securities to broker-dealers and other financial institutions provided that the value of the loaned securities does not exceed 30% of the Fund’s total assets. These loans earn income for the Fund and are collateralized by cash and securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities.

Small Cap Value Fund Investment Strategy - Small Cap Value Fund

May 31, 2026

<span style="color:#000000;font-family:Arial;font-size:12pt;font-weight:bold;">Principal Investment Strategies of the Fund</span>

Strategy Narrative [Text Block]

The Fund invests, under normal circumstances, at least 80% of its net assets in securities of small-cap value companies. The Fund invests primarily in equity securities. For purposes of the Fund’s 80% investment policy, a company is considered to be a value company if it: (i) issues securities that are represented in a third-party value-style index or that are classified as a value company by a third-party vendor; or (ii) meets a relevant equity market measurement in at least one “value metric” similar to those commonly used by third-party index providers or third-party vendors in value classifications, such as earnings growth, price-to-earnings or sales growth, among others.A company will be considered a small-cap company if its market capitalization, at time of purchase, is equal to or less than the largest company in the Russell 2000® Value Index during the most recent 12-month period. As of August 31, 2026, the median stock by market capitalization in the Index was approximately $0.930 million, and the largest stock was approximately $10.761 billion. The size of the companies in the Index changes with market conditions and the composition of the Index. The subadvisers use a value-oriented approach. Within the universe of value companies, companies will be selected based upon valuation characteristics such as price-to-cash flow ratios which are at a discount to market averages. Although the Fund primarily invests in domestic issuers, the Fund is authorized to invest up to 25% of its assets in the securities of foreign issuers. In order to generate additional income, the Fund may lend portfolio securities to broker-dealers and other financial institutions provided that the value of the loaned securities does not exceed 30% of the Fund’s total assets. These loans earn income for the Fund and are collateralized by cash and securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities.