Shareholder Report, Holdings (Details)
|
May 31, 2025 |
| Columbia Seligman Technology and Information Fund - Class A | Broadcom, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund - Class A | NVIDIA Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.80%
|
| Columbia Seligman Technology and Information Fund - Class A | Lam Research Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund - Class A | Microsoft Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund - Class A | Alphabet, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.30%
|
| Columbia Seligman Technology and Information Fund - Class A | Bloom Energy Corp., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.90%
|
| Columbia Seligman Technology and Information Fund - Class A | Apple, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.50%
|
| Columbia Seligman Technology and Information Fund - Class A | Visa, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.30%
|
| Columbia Seligman Technology and Information Fund - Class A | Applied Materials, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.00%
|
| Columbia Seligman Technology and Information Fund - Class A | Meta Platforms, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund - Class A | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
67.70%
|
| Columbia Seligman Technology and Information Fund - Class A | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.70%
|
| Columbia Seligman Technology and Information Fund - Class A | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund - Class A | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.50%
|
| Columbia Seligman Technology and Information Fund - Class A | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.00%
|
| Columbia Seligman Technology and Information Fund - Class A | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| Columbia Seligman Technology and Information Fund - Class A | Semiconductors [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
20.90%
|
| Columbia Seligman Technology and Information Fund - Class A | Systems Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.80%
|
| Columbia Seligman Technology and Information Fund - Class A | Semiconductor Materials & Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.10%
|
| Columbia Seligman Technology and Information Fund - Class A | Technology Hardware, Storage & Peripherals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
8.60%
|
| Columbia Seligman Technology and Information Fund - Class A | Application Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.40%
|
| Columbia Seligman Technology and Information Fund - Class A | Communications Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.40%
|
| Columbia Seligman Technology and Information Fund - Class A | Internet Services & Infrastructure [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund - Class A | Electronic Equipment & Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.20%
|
| Columbia Seligman Technology and Information Fund - Class A | Other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.50%
|
| Columbia Seligman Technology and Information Fund - Class C | Broadcom, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund - Class C | NVIDIA Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.80%
|
| Columbia Seligman Technology and Information Fund - Class C | Lam Research Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund - Class C | Microsoft Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund - Class C | Alphabet, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.30%
|
| Columbia Seligman Technology and Information Fund - Class C | Bloom Energy Corp., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.90%
|
| Columbia Seligman Technology and Information Fund - Class C | Apple, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.50%
|
| Columbia Seligman Technology and Information Fund - Class C | Visa, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.30%
|
| Columbia Seligman Technology and Information Fund - Class C | Applied Materials, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.00%
|
| Columbia Seligman Technology and Information Fund - Class C | Meta Platforms, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund - Class C | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
67.70%
|
| Columbia Seligman Technology and Information Fund - Class C | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.70%
|
| Columbia Seligman Technology and Information Fund - Class C | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund - Class C | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.50%
|
| Columbia Seligman Technology and Information Fund - Class C | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.00%
|
| Columbia Seligman Technology and Information Fund - Class C | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| Columbia Seligman Technology and Information Fund - Class C | Semiconductors [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
20.90%
|
| Columbia Seligman Technology and Information Fund - Class C | Systems Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.80%
|
| Columbia Seligman Technology and Information Fund - Class C | Semiconductor Materials & Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.10%
|
| Columbia Seligman Technology and Information Fund - Class C | Technology Hardware, Storage & Peripherals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
8.60%
|
| Columbia Seligman Technology and Information Fund - Class C | Application Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.40%
|
| Columbia Seligman Technology and Information Fund - Class C | Communications Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.40%
|
| Columbia Seligman Technology and Information Fund - Class C | Internet Services & Infrastructure [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund - Class C | Electronic Equipment & Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.20%
|
| Columbia Seligman Technology and Information Fund - Class C | Other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.50%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Broadcom, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | NVIDIA Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.80%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Lam Research Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Microsoft Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Alphabet, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.30%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Bloom Energy Corp., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.90%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Apple, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.50%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Visa, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.30%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Applied Materials, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.00%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Meta Platforms, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
67.70%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.70%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.50%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.00%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Semiconductors [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
20.90%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Systems Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.80%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Semiconductor Materials & Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.10%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Technology Hardware, Storage & Peripherals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
8.60%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Application Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.40%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Communications Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.40%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Internet Services & Infrastructure [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Electronic Equipment & Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.20%
|
| Columbia Seligman Technology and Information Fund - Institutional Class | Other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.50%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Broadcom, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | NVIDIA Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.80%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Lam Research Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Microsoft Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Alphabet, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.30%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Bloom Energy Corp., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.90%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Apple, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.50%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Visa, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.30%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Applied Materials, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.00%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Meta Platforms, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
67.70%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.70%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.50%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.00%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Semiconductors [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
20.90%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Systems Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.80%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Semiconductor Materials & Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.10%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Technology Hardware, Storage & Peripherals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
8.60%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Application Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.40%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Communications Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.40%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Internet Services & Infrastructure [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Electronic Equipment & Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.20%
|
| Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member] | Other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.50%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Broadcom, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | NVIDIA Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.80%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Lam Research Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Microsoft Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Alphabet, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.30%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Bloom Energy Corp., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.90%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Apple, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.50%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Visa, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.30%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Applied Materials, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.00%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Meta Platforms, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
67.70%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.70%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.50%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.00%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Semiconductors [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
20.90%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Systems Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.80%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Semiconductor Materials & Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.10%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Technology Hardware, Storage & Peripherals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
8.60%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Application Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.40%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Communications Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.40%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Internet Services & Infrastructure [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Electronic Equipment & Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.20%
|
| Columbia Seligman Technology and Information Fund Institutional 3 Class | Other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.50%
|
| Columbia Seligman Technology and Information Fund -Class R | Broadcom, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund -Class R | NVIDIA Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.80%
|
| Columbia Seligman Technology and Information Fund -Class R | Lam Research Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund -Class R | Microsoft Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund -Class R | Alphabet, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.30%
|
| Columbia Seligman Technology and Information Fund -Class R | Bloom Energy Corp., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.90%
|
| Columbia Seligman Technology and Information Fund -Class R | Apple, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.50%
|
| Columbia Seligman Technology and Information Fund -Class R | Visa, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.30%
|
| Columbia Seligman Technology and Information Fund -Class R | Applied Materials, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.00%
|
| Columbia Seligman Technology and Information Fund -Class R | Meta Platforms, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund -Class R | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
67.70%
|
| Columbia Seligman Technology and Information Fund -Class R | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.70%
|
| Columbia Seligman Technology and Information Fund -Class R | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund -Class R | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.50%
|
| Columbia Seligman Technology and Information Fund -Class R | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.00%
|
| Columbia Seligman Technology and Information Fund -Class R | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| Columbia Seligman Technology and Information Fund -Class R | Semiconductors [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
20.90%
|
| Columbia Seligman Technology and Information Fund -Class R | Systems Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.80%
|
| Columbia Seligman Technology and Information Fund -Class R | Semiconductor Materials & Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.10%
|
| Columbia Seligman Technology and Information Fund -Class R | Technology Hardware, Storage & Peripherals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
8.60%
|
| Columbia Seligman Technology and Information Fund -Class R | Application Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.40%
|
| Columbia Seligman Technology and Information Fund -Class R | Communications Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.40%
|
| Columbia Seligman Technology and Information Fund -Class R | Internet Services & Infrastructure [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund -Class R | Electronic Equipment & Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.20%
|
| Columbia Seligman Technology and Information Fund -Class R | Other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.50%
|
| Columbia Seligman Technology and Information Fund -Class S | Broadcom, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund -Class S | NVIDIA Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.80%
|
| Columbia Seligman Technology and Information Fund -Class S | Lam Research Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund -Class S | Microsoft Corp. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.60%
|
| Columbia Seligman Technology and Information Fund -Class S | Alphabet, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.30%
|
| Columbia Seligman Technology and Information Fund -Class S | Bloom Energy Corp., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.90%
|
| Columbia Seligman Technology and Information Fund -Class S | Apple, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.50%
|
| Columbia Seligman Technology and Information Fund -Class S | Visa, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.30%
|
| Columbia Seligman Technology and Information Fund -Class S | Applied Materials, Inc. [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.00%
|
| Columbia Seligman Technology and Information Fund -Class S | Meta Platforms, Inc., Class A [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund -Class S | Information Technology Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
67.70%
|
| Columbia Seligman Technology and Information Fund -Class S | Communications Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.70%
|
| Columbia Seligman Technology and Information Fund -Class S | Financial Services Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.80%
|
| Columbia Seligman Technology and Information Fund -Class S | Industrial Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
5.50%
|
| Columbia Seligman Technology and Information Fund -Class S | Consumer Discretionary Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
4.00%
|
| Columbia Seligman Technology and Information Fund -Class S | Unclassified Sector [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.30%
|
| Columbia Seligman Technology and Information Fund -Class S | Semiconductors [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
20.90%
|
| Columbia Seligman Technology and Information Fund -Class S | Systems Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
13.80%
|
| Columbia Seligman Technology and Information Fund -Class S | Semiconductor Materials & Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
10.10%
|
| Columbia Seligman Technology and Information Fund -Class S | Technology Hardware, Storage & Peripherals [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
8.60%
|
| Columbia Seligman Technology and Information Fund -Class S | Application Software [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
6.40%
|
| Columbia Seligman Technology and Information Fund -Class S | Communications Equipment [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
3.40%
|
| Columbia Seligman Technology and Information Fund -Class S | Internet Services & Infrastructure [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
2.80%
|
| Columbia Seligman Technology and Information Fund -Class S | Electronic Equipment & Instruments [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
1.20%
|
| Columbia Seligman Technology and Information Fund -Class S | Other [Member] |
|
| Holdings [Line Items] |
|
| Percent of Net Asset Value |
0.50%
|