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 132 Months Ended
Apr. 30, 2025
Apr. 30, 2015
Apr. 30, 2016
Apr. 30, 2017
Apr. 30, 2018
Apr. 30, 2019
Apr. 30, 2020
Apr. 30, 2021
Apr. 30, 2022
Apr. 30, 2023
Apr. 30, 2024
Apr. 30, 2025
Columbia California Intermediate Municipal Bond Fund - Class A                        
Account Value [Line Items]                        
Line Graph and Table Measure Name Class A (including sales charges)                      
Accumulated Value   $ 9,704 $ 10,166 $ 10,090 $ 10,201 $ 10,711 $ 10,729 $ 11,459 $ 10,662 $ 10,956 $ 11,159 $ 11,279
Columbia California Intermediate Municipal Bond Fund - Institutional Class                        
Account Value [Line Items]                        
Line Graph and Table Measure Name Institutional Class                      
Accumulated Value   10,000 10,512 10,459 10,600 11,159 11,194 11,998 11,189 11,527 11,782 11,926
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class                        
Account Value [Line Items]                        
Line Graph and Table Measure Name Institutional 2 Class                      
Accumulated Value   10,000 10,523 10,478 10,627 11,195 11,236 12,051 11,241 11,582 11,828 11,973
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class                        
Account Value [Line Items]                        
Line Graph and Table Measure Name [1] Institutional 3 Class                      
Accumulated Value   10,000 10,512 10,460 10,614 11,185 11,243 12,052 11,250 11,597 11,861 12,013
Columbia California Intermediate Municipal Bond Fund - Class S                        
Account Value [Line Items]                        
Line Graph and Table Measure Name [2] Class S                      
Accumulated Value   10,000 10,512 10,459 10,600 11,159 11,194 11,998 11,189 11,527 11,782 11,925
Bloomberg Municipal Bond Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name [3] Bloomberg Municipal Bond Index                      
Accumulated Value   10,000 10,529 10,545 10,709 11,368 11,614 12,513 11,527 11,858 12,105 12,306
Bloomberg California 3-15 Year Blend Municipal Bond Index [Member]                        
Account Value [Line Items]                        
Line Graph and Table Measure Name Bloomberg California 3-15 Year Blend Municipal Bond Index                      
Accumulated Value   $ 10,000 $ 10,479 $ 10,464 $ 10,565 $ 11,154 $ 11,448 $ 12,133 $ 11,226 $ 11,675 $ 11,872 $ 12,051
[1] The returns shown for periods prior to March 1, 2017 (including Since Fund Inception returns, if shown) include the returns of Institutional Class. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investment-products/mutual-funds/appended-performance for more information.
[2] The returns shown for periods prior to October 2, 2024 (including Since Fund Inception returns, if shown) include the returns of Institutional Class. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investment-products/mutual-funds/appended-performance for more information.
[3] Effective August 1, 2024, the Fund compares its performance to the Bloomberg Municipal Bond Index, a broad-based performance index, as required by new regulatory requirements. The Fund’s performance also continues to be compared to its prior benchmarks, which management believes more closely represent the market sectors/and or asset classes in which the Fund primarily invests.