S000036208 [Member] Investment Strategy - S000036208 [Member]	May 31, 2026
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund’s assets primarily are invested in equity securities. Equity securities generally include common stocks, but may also include preferred stocks and convertible securities. The Fund may invest in companies that have market capitalizations of any size. Under normal circumstances, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of “value” companies. The Fund considers “value” companies to be those companies that are either constituents of an index constructed by a third party to identify companies with various characteristics of value companies, or that have a higher book-to-price (B/P) ratio than the median ranked stock within the company’s Global Industry Classification Standard (GICS) sector, have a higher EBITDA/EV (earnings before interest, taxes, depreciation and amortization-to-enterprise value) or have a lower price-to-earnings ratio than the median ranked stock within the company’s GICS sector. The third-party broad-based index currently used to identify value companies is the Russell 3000® Value Index. The Fund may invest up to 20% of its net assets in debt instruments, including those that, at the time of purchase, are rated below investment grade or are unrated but determined to be of comparable quality (commonly referred to as “high yield” investments or “junk” bonds). The Fund may invest up to 25% of its net assets in foreign investments. The Fund may invest in foreign securities directly or indirectly through depositary receipts. The Fund may at times emphasize one or more sectors in selecting its investments. As of its most recent fiscal year end, the Fund had an investment emphasis in the financials sector. The Fund may also invest in exchange-traded funds (ETFs), including pending the engagement of one or more additional subadvisers. Columbia Management Investment Advisers, LLC (Columbia Management or the Investment Manager) serves as the investment manager for the Fund and attempts to achieve the Fund’s objective by managing a portion of the Fund’s assets and selecting one or more subadvisers to manage other portions of the Fund’s assets independently of each other and Columbia Management. The Fund’s subadviser is American Century Investment Management, Inc. (American Century).

The Fund’s assets primarily are invested in equity securities. Equity securities generally include common stocks, but may also include preferred stocks and convertible securities. The Fund may invest in companies that have market capitalizations of any size. Under normal circumstances, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity securities of “value” companies. The Fund considers “value” companies to be those companies that are either constituents of an index constructed by a third party to identify companies with various characteristics of value companies, or that have a higher book-to-price (B/P) ratio than the median ranked stock within the company’s Global Industry Classification Standard (GICS) sector, have a higher EBITDA/EV (earnings before interest, taxes, depreciation and amortization-to-enterprise value) or have a lower price-to-earnings ratio than the median ranked stock within the company’s GICS sector. The third-party broad-based index currently used to identify value companies is the Russell 3000® Value Index.

The Fund may invest up to 20% of its net assets in debt instruments, including those that, at the time of purchase, are rated below investment grade or are unrated but determined to be of comparable quality (commonly referred to as “high yield” investments or “junk” bonds).

The Fund may invest up to 25% of its net assets in foreign investments. The Fund may invest in foreign securities directly or indirectly through depositary receipts. The Fund may at times emphasize one or more sectors in selecting its investments. As of its most recent fiscal year end, the Fund had an investment emphasis in the financials sector.

Columbia Management Investment Advisers, LLC (Columbia Management or the Investment Manager) serves as the investment manager for the Fund and attempts to achieve the Fund’s objective by managing a portion of the Fund’s assets and selecting one or more subadvisers to manage other portions of the Fund’s assets independently of each other and Columbia Management. The Fund’s subadviser is American Century Investment Management, Inc. (American Century).