Shareholder Report, Holdings (Details)	Apr. 30, 2025
Columbia California Intermediate Municipal Bond Fund - Class A \| Southern California Public Power Authority 04/01/2055 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Columbia California Intermediate Municipal Bond Fund - Class A \| Los Angeles Department of Water & Power 07/01/2041 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Columbia California Intermediate Municipal Bond Fund - Class A \| California State Public Works Board 08/01/2036 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.90%
Columbia California Intermediate Municipal Bond Fund - Class A \| Burbank-Glendale-Pasadena Airport Authority Brick Campaign 07/01/2044 5.250% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia California Intermediate Municipal Bond Fund - Class A \| State of California 08/01/2044 5.250% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Columbia California Intermediate Municipal Bond Fund - Class A \| California State University 11/01/2042 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Columbia California Intermediate Municipal Bond Fund - Class A \| Los Angeles Unified School District 07/01/2032 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia California Intermediate Municipal Bond Fund - Class A \| Golden State Tobacco Securitization Corp. 06/01/2033 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia California Intermediate Municipal Bond Fund - Class A \| Foothill-Eastern Transportation Corridor Agency 01/15/2033 0.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Columbia California Intermediate Municipal Bond Fund - Class A \| Southern California Public Power Authority 07/01/2041 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Columbia California Intermediate Municipal Bond Fund - Class A \| A A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.60%
Columbia California Intermediate Municipal Bond Fund - Class A \| A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	33.50%
Columbia California Intermediate Municipal Bond Fund - Class A \| B B B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.30%
Columbia California Intermediate Municipal Bond Fund - Class A \| B B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Columbia California Intermediate Municipal Bond Fund - Class A \| Not Rated [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia California Intermediate Municipal Bond Fund - Class A \| Municipal Bond [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.30%
Columbia California Intermediate Municipal Bond Fund - Class A \| Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| Southern California Public Power Authority 04/01/2055 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| Los Angeles Department of Water & Power 07/01/2041 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| California State Public Works Board 08/01/2036 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.90%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| Burbank-Glendale-Pasadena Airport Authority Brick Campaign 07/01/2044 5.250% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| State of California 08/01/2044 5.250% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| California State University 11/01/2042 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| Los Angeles Unified School District 07/01/2032 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| Golden State Tobacco Securitization Corp. 06/01/2033 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| Foothill-Eastern Transportation Corridor Agency 01/15/2033 0.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| Southern California Public Power Authority 07/01/2041 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| A A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.60%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	33.50%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| B B B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.30%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| B B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| Not Rated [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| Municipal Bond [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.30%
Columbia California Intermediate Municipal Bond Fund - Institutional Class \| Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| Southern California Public Power Authority 04/01/2055 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| Los Angeles Department of Water & Power 07/01/2041 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| California State Public Works Board 08/01/2036 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.90%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| Burbank-Glendale-Pasadena Airport Authority Brick Campaign 07/01/2044 5.250% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| State of California 08/01/2044 5.250% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| California State University 11/01/2042 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| Los Angeles Unified School District 07/01/2032 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| Golden State Tobacco Securitization Corp. 06/01/2033 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| Foothill-Eastern Transportation Corridor Agency 01/15/2033 0.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| Southern California Public Power Authority 07/01/2041 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| A A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.60%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	33.50%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| B B B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.30%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| B B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| Not Rated [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| Municipal Bond [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.30%
Columbia California Intermediate Municipal Bond Fund - Institutional 2 Class \| Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| Southern California Public Power Authority 04/01/2055 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| Los Angeles Department of Water & Power 07/01/2041 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| California State Public Works Board 08/01/2036 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.90%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| Burbank-Glendale-Pasadena Airport Authority Brick Campaign 07/01/2044 5.250% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| State of California 08/01/2044 5.250% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| California State University 11/01/2042 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| Los Angeles Unified School District 07/01/2032 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| Golden State Tobacco Securitization Corp. 06/01/2033 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| Foothill-Eastern Transportation Corridor Agency 01/15/2033 0.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| Southern California Public Power Authority 07/01/2041 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| A A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.60%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	33.50%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| B B B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.30%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| B B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| Not Rated [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| Municipal Bond [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.30%
Columbia California Intermediate Municipal Bond Fund - Institutional 3 Class \| Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%
Columbia California Intermediate Municipal Bond Fund - Class S \| Southern California Public Power Authority 04/01/2055 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Columbia California Intermediate Municipal Bond Fund - Class S \| Los Angeles Department of Water & Power 07/01/2041 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.10%
Columbia California Intermediate Municipal Bond Fund - Class S \| California State Public Works Board 08/01/2036 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.90%
Columbia California Intermediate Municipal Bond Fund - Class S \| Burbank-Glendale-Pasadena Airport Authority Brick Campaign 07/01/2044 5.250% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia California Intermediate Municipal Bond Fund - Class S \| State of California 08/01/2044 5.250% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Columbia California Intermediate Municipal Bond Fund - Class S \| California State University 11/01/2042 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.50%
Columbia California Intermediate Municipal Bond Fund - Class S \| Los Angeles Unified School District 07/01/2032 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia California Intermediate Municipal Bond Fund - Class S \| Golden State Tobacco Securitization Corp. 06/01/2033 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.40%
Columbia California Intermediate Municipal Bond Fund - Class S \| Foothill-Eastern Transportation Corridor Agency 01/15/2033 0.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Columbia California Intermediate Municipal Bond Fund - Class S \| Southern California Public Power Authority 07/01/2041 5.000% [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.30%
Columbia California Intermediate Municipal Bond Fund - Class S \| A A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	52.60%
Columbia California Intermediate Municipal Bond Fund - Class S \| A Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	33.50%
Columbia California Intermediate Municipal Bond Fund - Class S \| B B B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.30%
Columbia California Intermediate Municipal Bond Fund - Class S \| B B Rating [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.10%
Columbia California Intermediate Municipal Bond Fund - Class S \| Not Rated [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.80%
Columbia California Intermediate Municipal Bond Fund - Class S \| Municipal Bond [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.30%
Columbia California Intermediate Municipal Bond Fund - Class S \| Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.70%

Shareholder Report, Holdings (Details)

Apr. 30, 2025