v3.25.2
S000031370 [Member] Average Annual Total Returns
 3 Months Ended 12 Months Ended 60 Months Ended 94 Months Ended 120 Months Ended 171 Months Ended 260 Months Ended 277 Months Ended 307 Months Ended 498 Months Ended
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
S&P North American Technology Sector Index (reflects no deductions for fees, expenses or taxes)                    
Prospectus [Line Items]                    
Average Annual Return, Percent   36.08% 21.06%   20.70%          
Russell 3000® Index (reflects no deductions for fees, expenses or taxes)                    
Prospectus [Line Items]                    
Average Annual Return, Percent   23.81% 13.86%   12.55%          
Columbia Seligman Technology and Information Fund Institutional Class                    
Prospectus [Line Items]                    
Average Annual Return, Percent   27.11% 20.61%   20.00%          
Performance Inception Date           Sep. 27, 2010        
Columbia Seligman Technology and Information Fund Institutional 3 Class                    
Prospectus [Line Items]                    
Average Annual Return, Percent   27.21% 20.72%   20.02%          
Performance Inception Date       Mar. 01, 2017            
Columbia Seligman Technology and Information Fund Class S                    
Prospectus [Line Items]                    
Average Annual Return, Percent   26.88% 20.32%   19.71%          
Performance Inception Date Oct. 02, 2024                  
Columbia Seligman Technology and Information Fund Class A                    
Prospectus [Line Items]                    
Average Annual Return, Percent   19.50% 18.90%   19.00%          
Performance Inception Date                   Jun. 23, 1983
Columbia Seligman Technology and Information Fund Class A | After Taxes on Distributions                    
Prospectus [Line Items]                    
Average Annual Return, Percent   15.95% 16.24%   16.24%          
Performance Inception Date                   Jun. 23, 1983
Columbia Seligman Technology and Information Fund Class A | After Taxes on Distributions and Sales                    
Prospectus [Line Items]                    
Average Annual Return, Percent   14.07% 14.84%   15.14%          
Performance Inception Date                   Jun. 23, 1983
Columbia Seligman Technology and Information Fund Class C                    
Prospectus [Line Items]                    
Average Annual Return, Percent   24.93% 19.42%   18.81%          
Performance Inception Date                 May 27, 1999  
Columbia Seligman Technology and Information Fund Class R                    
Prospectus [Line Items]                    
Average Annual Return, Percent   26.48% 20.01%   19.40%          
Performance Inception Date             Apr. 30, 2003      
Columbia Seligman Technology and Information Fund Institutional 2 Class                    
Prospectus [Line Items]                    
Average Annual Return, Percent   27.17% 20.66%   20.07%          
Performance Inception Date               Nov. 30, 2001