Shareholder Report, Average Annual Return (Details)		12 Months Ended	60 Months Ended	120 Months Ended
		Aug. 31, 2024	Aug. 31, 2024	Aug. 31, 2024
Multi-Manager Alternative Strategies Fund - Institutional Class
Average Annual Return [Line Items]
Line Graph and Table Measure Name		Institutional Class
Average Annual Return, Percent	[1],[2]	4.18%	2.87%	1.35%
FTSE Three-Month U.S. Treasury Bill Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name		FTSE Three-Month U.S. Treasury Bill Index
Average Annual Return, Percent		5.65%	2.33%	1.62%
Bloomberg Global Aggregate Index [Member]
Average Annual Return [Line Items]
Line Graph and Table Measure Name		Bloomberg Global Aggregate Index
Average Annual Return, Percent		6.90%	(1.37%)	0.12%

[1] Effective August 1, 2024, the Fund compares its performance to the Bloomberg Global Aggregate Index, a broad-based performance index that meets new regulatory requirements. The Fund’s performance is also compared to its prior benchmark, which more closely represents the market sectors and/or asset classes in which the Fund primarily invests.

[2] The returns shown for periods prior to January 3, 2017 (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of Class A. Class A shares were offered prior to the Fund's Institutional Class shares but have since been merged into the Fund’s Institutional Class shares. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.