v3.26.1
S000012096 [Member] Average Annual Total Returns
 12 Months Ended 15 Months Ended 60 Months Ended 120 Months Ended 158 Months Ended 305 Months Ended 478 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Blended Benchmark (consisting of 85% Bloomberg U.S. Corporate Bond Index and 15% ICE BofA U.S. Cash Pay High Yield Constrained Index) (reflects no deduction for fees, expenses, taxes or, for ICE BofA U.S. Cash Pay High Yield Constrained Index for periods prior to July 2022, transaction costs)              
Prospectus [Line Items]              
Average Annual Return, Percent 7.89%   0.60% 3.75%      
Bloomberg U.S. Corporate Bond Index (reflects no deductions for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent 7.77%   (0.09%) 3.27%      
Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent 7.30%   (0.36%) 2.01%      
Columbia Select Corporate Income Fund Institutional 2 Class              
Prospectus [Line Items]              
Average Annual Return, Percent 7.57%   0.45% 3.88%      
Performance Inception Date         Nov. 08, 2012    
Columbia Select Corporate Income Fund Class S              
Prospectus [Line Items]              
Average Annual Return, Percent 7.33%   0.32% 3.77%      
Performance Inception Date   Oct. 02, 2024          
Columbia Select Corporate Income Fund Class A              
Prospectus [Line Items]              
Average Annual Return, Percent 1.98%   (0.90%) 3.01%      
Performance Inception Date           Jul. 31, 2000  
Columbia Select Corporate Income Fund Class A | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent 0.21%   (2.39%) 1.54%      
Performance Inception Date           Jul. 31, 2000  
Columbia Select Corporate Income Fund Class A | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent 1.14%   (1.30%) 1.72%      
Performance Inception Date           Jul. 31, 2000  
Columbia Select Corporate Income Fund Institutional Class              
Prospectus [Line Items]              
Average Annual Return, Percent 7.33%   0.32% 3.77%      
Performance Inception Date             Mar. 05, 1986
Columbia Select Corporate Income Fund Institutional 3 Class              
Prospectus [Line Items]              
Average Annual Return, Percent 7.49%   0.48% 3.92%      
Performance Inception Date         Nov. 08, 2012