v3.25.2
Shareholder Report, Line Graph (Details) - USD ($)
 12 Months Ended 24 Months Ended 36 Months Ended 48 Months Ended 60 Months Ended 72 Months Ended 84 Months Ended 96 Months Ended 108 Months Ended 120 Months Ended
May 31, 2015
May 31, 2025
May 31, 2016
May 31, 2017
May 31, 2018
May 31, 2019
May 31, 2020
May 31, 2021
May 31, 2022
May 31, 2023
May 31, 2024
May 31, 2025
Columbia Seligman Technology and Information Fund - Class A                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Class A (including sales charges)                    
Accumulated Value $ 9,425   $ 9,222 $ 13,070 $ 15,272 $ 15,042 $ 19,760 $ 33,614 $ 32,492 $ 33,563 $ 44,489 $ 47,303
 Columbia Seligman Technology and Information Fund - Class C                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Class C (including sales charges)                    
Accumulated Value 10,000   9,712 13,660 15,842 15,489 20,196 34,101 32,710 33,535 44,125 46,567
 Columbia Seligman Technology and Information Fund - Institutional Class                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Institutional Class                    
Accumulated Value 10,000   9,811 13,937 16,326 16,122 21,232 36,205 35,085 36,334 48,279 51,462
Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Institutional 2 Class                    
Accumulated Value 10,000   9,823 13,965 16,367 16,171 21,305 36,344 35,234 36,497 48,517 51,732
Columbia Seligman Technology and Information Fund Institutional 3 Class                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Institutional 3 Class                    
Accumulated Value 10,000   9,785 13,878 16,273 16,087 21,204 36,190 35,100 36,379 48,383 51,615
Columbia Seligman Technology and Information Fund -Class R                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Class R                    
Accumulated Value 10,000   9,761 13,798 16,083 15,802 20,706 35,137 33,877 34,906 46,152 48,951
Columbia Seligman Technology and Information Fund -Class S                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Class S                    
Accumulated Value 10,000   9,785 13,867 16,203 15,960 20,966 35,665 34,475 35,611 47,203 50,272
Russell 3000® Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   Russell 3000® Index                    
Accumulated Value 10,000   10,022 11,795 13,572 13,911 15,505 22,314 21,492 21,929 27,978 31,648
S&P North American Technology Sector Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name   S&P North American Technology Sector Index                    
Accumulated Value $ 10,000   $ 10,617 $ 14,136 $ 18,570 $ 19,520 $ 25,982 $ 37,573 $ 32,919 $ 37,598 $ 53,018 $ 61,765