v3.25.2
S000045258 [Member] Average Annual Total Returns
 3 Months Ended 12 Months Ended 60 Months Ended 94 Months Ended 120 Months Ended 128 Months Ended
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
FTSE One-Month U.S. Treasury Bill Index (reflects no deductions for fees, expenses or taxes)            
Prospectus [Line Items]            
Average Annual Return, Percent   5.38% 2.47%   1.74%  
Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes)            
Prospectus [Line Items]            
Average Annual Return, Percent   1.25% (0.33%)   1.35%  
Columbia Mortgage Opportunities Fund Class S            
Prospectus [Line Items]            
Average Annual Return, Percent   5.04% 1.12%   3.27%  
Performance Inception Date Oct. 02, 2024          
Columbia Mortgage Opportunities Fund Class A            
Prospectus [Line Items]            
Average Annual Return, Percent   1.97% 0.53%   2.96%  
Performance Inception Date           Apr. 30, 2014
Columbia Mortgage Opportunities Fund Class A | After Taxes on Distributions            
Prospectus [Line Items]            
Average Annual Return, Percent   (0.33%) (1.73%)   0.75%  
Performance Inception Date           Apr. 30, 2014
Columbia Mortgage Opportunities Fund Class A | After Taxes on Distributions and Sales            
Prospectus [Line Items]            
Average Annual Return, Percent   1.12% (0.54%)   1.30%  
Performance Inception Date           Apr. 30, 2014
Columbia Mortgage Opportunities Fund Class C            
Prospectus [Line Items]            
Average Annual Return, Percent   3.19% 0.36%   2.50%  
Performance Inception Date           Apr. 30, 2014
Columbia Mortgage Opportunities Fund Institutional 2 Class            
Prospectus [Line Items]            
Average Annual Return, Percent   5.29% 1.41%   3.58%  
Performance Inception Date           Apr. 30, 2014
Columbia Mortgage Opportunities Fund Institutional Class            
Prospectus [Line Items]            
Average Annual Return, Percent   5.24% 1.37%   3.53%  
Performance Inception Date           Apr. 30, 2014
Columbia Mortgage Opportunities Fund Institutional 3 Class            
Prospectus [Line Items]            
Average Annual Return, Percent   5.33% 1.46%   3.55%  
Performance Inception Date       Mar. 01, 2017