S000086826 [Member] Investment Strategy - S000086826 [Member]	Mar. 31, 2025
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies
Strategy Narrative [Text Block]	The Fund is an actively managed exchange-traded fund (ETF). Under normal market conditions, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in high-yield debt instruments (commonly referred to as “junk” bonds). These high yield debt instruments include corporate debt securities as well as floating rate loans rated below investment grade by nationally recognized statistical rating organizations (e.g., lower than Baa by Moody’s Investors Service, Inc. or lower than BBB by S&P Global Ratings or Fitch Ratings, Inc.), or if unrated, determined by Columbia Management Investment Advisers, LLC (the Investment Manager) to be of comparable quality. The Fund may also invest in investment grade debt instruments and in debt instruments of foreign issuers. Corporate debt instruments in which the Fund invests are typically unsecured, with a fixed-rate of interest, and are usually issued by companies or similar entities to provide financing for their operations, or other activities. Floating rate loans, which are another form of financing, are typically secured, with interest rates that adjust or “float” periodically (normally on a daily, monthly, quarterly or semiannual basis by reference to a base lending rate, plus a premium). Secured debt instruments are ordinarily secured by specific collateral or assets of the issuer or borrower such that holders of these instruments will have claims senior to the claims of other parties who hold unsecured instruments. Under normal circumstances, the Fund’s dollar-weighted average effective maturity will be five years or less, and its duration will be three years or less. The Fund is non-diversified, which means that it can invest a greater percentage of its assets in the securities of fewer issuers than can a diversified fund.

The Fund is an actively managed exchange-traded fund (ETF). Under normal market conditions, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in high-yield debt instruments (commonly referred to as “junk” bonds). These high yield debt instruments include corporate debt securities as well as floating rate loans rated below investment grade by nationally recognized statistical rating organizations (e.g., lower than Baa by Moody’s Investors Service, Inc. or lower than BBB by S&P Global Ratings or Fitch Ratings, Inc.), or if unrated, determined by Columbia Management Investment Advisers, LLC (the Investment Manager) to be of comparable quality.

Corporate debt instruments in which the Fund invests are typically unsecured, with a fixed-rate of interest, and are usually issued by companies or similar entities to provide financing for their operations, or other activities. Floating rate loans, which are another form of financing, are typically secured, with interest rates that adjust or “float” periodically (normally on a daily, monthly, quarterly or semiannual basis by reference to a base lending rate, plus a premium). Secured debt instruments are ordinarily secured by specific collateral or assets of the issuer or borrower such that holders of these instruments will have claims senior to the claims of other parties who hold unsecured instruments.

Under normal circumstances, the Fund’s dollar-weighted average effective maturity will be five years or less, and its duration will be three years or less.

The Fund is non-diversified, which means that it can invest a greater percentage of its assets in the securities of fewer issuers than can a diversified fund.