v3.26.1
Shareholder Report
6 Months Ended
Apr. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Columbia Funds Series Trust II
Entity Central Index Key 0001352280
Entity Investment Company Type N-1A
Document Period End Date Apr. 30, 2026
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
C000095017  
Shareholder Report [Line Items]  
Fund Name Columbia Select Global Equity Fund
Class Name Class A
Trading Symbol IGLGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Select Global Equity Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Class A
$62
1.20%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 62
Expense Ratio, Percent 1.20% [1]
AssetsNet $ 791,809,915
Holdings Count | Holding 42
InvestmentCompanyPortfolioTurnover 43.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$791,809,915
Total number of portfolio holdings
42
Portfolio turnover for the reporting period
43%
Holdings [Text Block]

Geographic Allocation 

Table Summary
United States
66.8%
Taiwan
7.5%
Japan
5.0%
France
4.8%
United Kingdom
3.0%
Netherlands
2.7%
Switzerland
2.0%
Germany
1.3%
Belgium
1.0%
Hong Kong
1.0%
Other
3.6%

Equity Sector Allocation

Table Summary
Information Technology
39.5%
Industrials
11.9%
Financials
10.9%
Consumer Discretionary
9.9%
Health Care
6.7%
Communication Services
6.4%
Consumer Staples
4.7%
Materials
3.8%
Energy
3.5%
Utilities
1.3%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Lam Research Corp.
8.1%
NVIDIA Corp.
8.0%
Taiwan Semiconductor Manufacturing Co., Ltd.
7.5%
Western Digital Corp.
5.7%
Alphabet, Inc., Class A
5.5%
Amazon.com, Inc.
4.9%
MasterCard, Inc., Class A
4.4%
Howmet Aerospace, Inc.
3.9%
Linde PLC
3.8%
Microsoft Corp.
3.8%
Material Fund Change [Text Block]
C000095019  
Shareholder Report [Line Items]  
Fund Name Columbia Select Global Equity Fund
Class Name Class C
Trading Symbol RGCEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Select Global Equity Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Class C
$100
1.95%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 100
Expense Ratio, Percent 1.95% [2]
AssetsNet $ 791,809,915
Holdings Count | Holding 42
InvestmentCompanyPortfolioTurnover 43.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$791,809,915
Total number of portfolio holdings
42
Portfolio turnover for the reporting period
43%
Holdings [Text Block]

Geographic Allocation 

Table Summary
United States
66.8%
Taiwan
7.5%
Japan
5.0%
France
4.8%
United Kingdom
3.0%
Netherlands
2.7%
Switzerland
2.0%
Germany
1.3%
Belgium
1.0%
Hong Kong
1.0%
Other
3.6%

Equity Sector Allocation

Table Summary
Information Technology
39.5%
Industrials
11.9%
Financials
10.9%
Consumer Discretionary
9.9%
Health Care
6.7%
Communication Services
6.4%
Consumer Staples
4.7%
Materials
3.8%
Energy
3.5%
Utilities
1.3%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Lam Research Corp.
8.1%
NVIDIA Corp.
8.0%
Taiwan Semiconductor Manufacturing Co., Ltd.
7.5%
Western Digital Corp.
5.7%
Alphabet, Inc., Class A
5.5%
Amazon.com, Inc.
4.9%
MasterCard, Inc., Class A
4.4%
Howmet Aerospace, Inc.
3.9%
Linde PLC
3.8%
Microsoft Corp.
3.8%
Material Fund Change [Text Block]
C000097634  
Shareholder Report [Line Items]  
Fund Name Columbia Select Global Equity Fund
Class Name Institutional 2 Class
Trading Symbol RGERX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Select Global Equity Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Institutional 2 Class
$48
0.93%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 48
Expense Ratio, Percent 0.93% [3]
AssetsNet $ 791,809,915
Holdings Count | Holding 42
InvestmentCompanyPortfolioTurnover 43.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$791,809,915
Total number of portfolio holdings
42
Portfolio turnover for the reporting period
43%
Holdings [Text Block]

Geographic Allocation 

Table Summary
United States
66.8%
Taiwan
7.5%
Japan
5.0%
France
4.8%
United Kingdom
3.0%
Netherlands
2.7%
Switzerland
2.0%
Germany
1.3%
Belgium
1.0%
Hong Kong
1.0%
Other
3.6%

Equity Sector Allocation

Table Summary
Information Technology
39.5%
Industrials
11.9%
Financials
10.9%
Consumer Discretionary
9.9%
Health Care
6.7%
Communication Services
6.4%
Consumer Staples
4.7%
Materials
3.8%
Energy
3.5%
Utilities
1.3%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Lam Research Corp.
8.1%
NVIDIA Corp.
8.0%
Taiwan Semiconductor Manufacturing Co., Ltd.
7.5%
Western Digital Corp.
5.7%
Alphabet, Inc., Class A
5.5%
Amazon.com, Inc.
4.9%
MasterCard, Inc., Class A
4.4%
Howmet Aerospace, Inc.
3.9%
Linde PLC
3.8%
Microsoft Corp.
3.8%
Material Fund Change [Text Block]
C000184719  
Shareholder Report [Line Items]  
Fund Name Columbia Select Global Equity Fund
Class Name Institutional 3 Class
Trading Symbol CSEYX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Select Global Equity Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Institutional 3 Class
$45
0.88%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.88% [4]
AssetsNet $ 791,809,915
Holdings Count | Holding 42
InvestmentCompanyPortfolioTurnover 43.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$791,809,915
Total number of portfolio holdings
42
Portfolio turnover for the reporting period
43%
Holdings [Text Block]

Geographic Allocation 

Table Summary
United States
66.8%
Taiwan
7.5%
Japan
5.0%
France
4.8%
United Kingdom
3.0%
Netherlands
2.7%
Switzerland
2.0%
Germany
1.3%
Belgium
1.0%
Hong Kong
1.0%
Other
3.6%

Equity Sector Allocation

Table Summary
Information Technology
39.5%
Industrials
11.9%
Financials
10.9%
Consumer Discretionary
9.9%
Health Care
6.7%
Communication Services
6.4%
Consumer Staples
4.7%
Materials
3.8%
Energy
3.5%
Utilities
1.3%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Lam Research Corp.
8.1%
NVIDIA Corp.
8.0%
Taiwan Semiconductor Manufacturing Co., Ltd.
7.5%
Western Digital Corp.
5.7%
Alphabet, Inc., Class A
5.5%
Amazon.com, Inc.
4.9%
MasterCard, Inc., Class A
4.4%
Howmet Aerospace, Inc.
3.9%
Linde PLC
3.8%
Microsoft Corp.
3.8%
Material Fund Change [Text Block]
C000095023  
Shareholder Report [Line Items]  
Fund Name Columbia Select Global Equity Fund
Class Name Institutional Class
Trading Symbol CGEZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Select Global Equity Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Institutional Class
$49
0.95%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.95% [5]
AssetsNet $ 791,809,915
Holdings Count | Holding 42
InvestmentCompanyPortfolioTurnover 43.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$791,809,915
Total number of portfolio holdings
42
Portfolio turnover for the reporting period
43%
Holdings [Text Block]

Geographic Allocation 

Table Summary
United States
66.8%
Taiwan
7.5%
Japan
5.0%
France
4.8%
United Kingdom
3.0%
Netherlands
2.7%
Switzerland
2.0%
Germany
1.3%
Belgium
1.0%
Hong Kong
1.0%
Other
3.6%

Equity Sector Allocation

Table Summary
Information Technology
39.5%
Industrials
11.9%
Financials
10.9%
Consumer Discretionary
9.9%
Health Care
6.7%
Communication Services
6.4%
Consumer Staples
4.7%
Materials
3.8%
Energy
3.5%
Utilities
1.3%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Lam Research Corp.
8.1%
NVIDIA Corp.
8.0%
Taiwan Semiconductor Manufacturing Co., Ltd.
7.5%
Western Digital Corp.
5.7%
Alphabet, Inc., Class A
5.5%
Amazon.com, Inc.
4.9%
MasterCard, Inc., Class A
4.4%
Howmet Aerospace, Inc.
3.9%
Linde PLC
3.8%
Microsoft Corp.
3.8%
Material Fund Change [Text Block]
C000097563  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Global Technology Fund
Class Name Class A
Trading Symbol SHGTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Seligman Global Technology Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Class A
$71
1.25%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 71
Expense Ratio, Percent 1.25% [6]
AssetsNet $ 4,182,302,682
Holdings Count | Holding 80
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$4,182,302,682
Total number of portfolio holdings
80
Portfolio turnover for the reporting period
17%
Holdings [Text Block]

Information Technology Sub-Industry Allocation 

Table Summary
Semiconductors
24.4%
Semiconductor Materials & Equipment
12.0%
Technology Hardware, Storage & Peripherals
9.4%
Systems Software
8.4%
Application Software
5.3%
Communications Equipment
3.8%
Internet Services & Infrastructure
2.2%
Electronic Equipment & Instruments
1.8%
Other
0.3%

Equity Sector Allocation

Table Summary
Information Technology
67.6%
Industrials
14.7%
Communication Services
9.4%
Financials
3.8%
Consumer Discretionary
2.5%
Utilities
0.5%
Real Estate
0.1%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Bloom Energy Corp., Class A
13.5%
Lam Research Corp.
6.8%
Marvell Technology, Inc.
5.5%
Broadcom, Inc.
4.8%
NVIDIA Corp.
4.8%
Alphabet, Inc., Class A
4.3%
Western Digital Corp.
3.8%
Applied Materials, Inc.
3.5%
Apple, Inc.
2.8%
Microsoft Corp.
2.8%
Material Fund Change [Text Block]
C000097565  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Global Technology Fund
Class Name Class C
Trading Symbol SHTCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Seligman Global Technology Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Class C
$113
2.00%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 113
Expense Ratio, Percent 2.00% [7]
AssetsNet $ 4,182,302,682
Holdings Count | Holding 80
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$4,182,302,682
Total number of portfolio holdings
80
Portfolio turnover for the reporting period
17%
Holdings [Text Block]

Information Technology Sub-Industry Allocation 

Table Summary
Semiconductors
24.4%
Semiconductor Materials & Equipment
12.0%
Technology Hardware, Storage & Peripherals
9.4%
Systems Software
8.4%
Application Software
5.3%
Communications Equipment
3.8%
Internet Services & Infrastructure
2.2%
Electronic Equipment & Instruments
1.8%
Other
0.3%

Equity Sector Allocation

Table Summary
Information Technology
67.6%
Industrials
14.7%
Communication Services
9.4%
Financials
3.8%
Consumer Discretionary
2.5%
Utilities
0.5%
Real Estate
0.1%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Bloom Energy Corp., Class A
13.5%
Lam Research Corp.
6.8%
Marvell Technology, Inc.
5.5%
Broadcom, Inc.
4.8%
NVIDIA Corp.
4.8%
Alphabet, Inc., Class A
4.3%
Western Digital Corp.
3.8%
Applied Materials, Inc.
3.5%
Apple, Inc.
2.8%
Microsoft Corp.
2.8%
Material Fund Change [Text Block]
C000097567  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Global Technology Fund
Class Name Class R
Trading Symbol SGTRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Seligman Global Technology Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Class R
$85
1.50%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 85
Expense Ratio, Percent 1.50% [8]
AssetsNet $ 4,182,302,682
Holdings Count | Holding 80
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$4,182,302,682
Total number of portfolio holdings
80
Portfolio turnover for the reporting period
17%
Holdings [Text Block]

Information Technology Sub-Industry Allocation 

Table Summary
Semiconductors
24.4%
Semiconductor Materials & Equipment
12.0%
Technology Hardware, Storage & Peripherals
9.4%
Systems Software
8.4%
Application Software
5.3%
Communications Equipment
3.8%
Internet Services & Infrastructure
2.2%
Electronic Equipment & Instruments
1.8%
Other
0.3%

Equity Sector Allocation

Table Summary
Information Technology
67.6%
Industrials
14.7%
Communication Services
9.4%
Financials
3.8%
Consumer Discretionary
2.5%
Utilities
0.5%
Real Estate
0.1%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Bloom Energy Corp., Class A
13.5%
Lam Research Corp.
6.8%
Marvell Technology, Inc.
5.5%
Broadcom, Inc.
4.8%
NVIDIA Corp.
4.8%
Alphabet, Inc., Class A
4.3%
Western Digital Corp.
3.8%
Applied Materials, Inc.
3.5%
Apple, Inc.
2.8%
Microsoft Corp.
2.8%
Material Fund Change [Text Block]
C000253702  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Global Technology Fund
Class Name Class S
Trading Symbol CSGAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Seligman Global Technology Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Class S
$57
1.00%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.00% [9]
AssetsNet $ 4,182,302,682
Holdings Count | Holding 80
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$4,182,302,682
Total number of portfolio holdings
80
Portfolio turnover for the reporting period
17%
Holdings [Text Block]

Information Technology Sub-Industry Allocation 

Table Summary
Semiconductors
24.4%
Semiconductor Materials & Equipment
12.0%
Technology Hardware, Storage & Peripherals
9.4%
Systems Software
8.4%
Application Software
5.3%
Communications Equipment
3.8%
Internet Services & Infrastructure
2.2%
Electronic Equipment & Instruments
1.8%
Other
0.3%

Equity Sector Allocation

Table Summary
Information Technology
67.6%
Industrials
14.7%
Communication Services
9.4%
Financials
3.8%
Consumer Discretionary
2.5%
Utilities
0.5%
Real Estate
0.1%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Bloom Energy Corp., Class A
13.5%
Lam Research Corp.
6.8%
Marvell Technology, Inc.
5.5%
Broadcom, Inc.
4.8%
NVIDIA Corp.
4.8%
Alphabet, Inc., Class A
4.3%
Western Digital Corp.
3.8%
Applied Materials, Inc.
3.5%
Apple, Inc.
2.8%
Microsoft Corp.
2.8%
Material Fund Change [Text Block]
C000097569  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Global Technology Fund
Class Name Institutional 2 Class
Trading Symbol SGTTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Seligman Global Technology Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Institutional 2 Class
$54
0.95%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 54
Expense Ratio, Percent 0.95% [10]
AssetsNet $ 4,182,302,682
Holdings Count | Holding 80
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$4,182,302,682
Total number of portfolio holdings
80
Portfolio turnover for the reporting period
17%
Holdings [Text Block]

Information Technology Sub-Industry Allocation 

Table Summary
Semiconductors
24.4%
Semiconductor Materials & Equipment
12.0%
Technology Hardware, Storage & Peripherals
9.4%
Systems Software
8.4%
Application Software
5.3%
Communications Equipment
3.8%
Internet Services & Infrastructure
2.2%
Electronic Equipment & Instruments
1.8%
Other
0.3%

Equity Sector Allocation

Table Summary
Information Technology
67.6%
Industrials
14.7%
Communication Services
9.4%
Financials
3.8%
Consumer Discretionary
2.5%
Utilities
0.5%
Real Estate
0.1%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Bloom Energy Corp., Class A
13.5%
Lam Research Corp.
6.8%
Marvell Technology, Inc.
5.5%
Broadcom, Inc.
4.8%
NVIDIA Corp.
4.8%
Alphabet, Inc., Class A
4.3%
Western Digital Corp.
3.8%
Applied Materials, Inc.
3.5%
Apple, Inc.
2.8%
Microsoft Corp.
2.8%
Material Fund Change [Text Block]
C000184720  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Global Technology Fund
Class Name Institutional 3 Class
Trading Symbol CGTYX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Seligman Global Technology Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Institutional 3 Class
$51
0.90%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 51
Expense Ratio, Percent 0.90% [11]
AssetsNet $ 4,182,302,682
Holdings Count | Holding 80
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$4,182,302,682
Total number of portfolio holdings
80
Portfolio turnover for the reporting period
17%
Holdings [Text Block]

Information Technology Sub-Industry Allocation 

Table Summary
Semiconductors
24.4%
Semiconductor Materials & Equipment
12.0%
Technology Hardware, Storage & Peripherals
9.4%
Systems Software
8.4%
Application Software
5.3%
Communications Equipment
3.8%
Internet Services & Infrastructure
2.2%
Electronic Equipment & Instruments
1.8%
Other
0.3%

Equity Sector Allocation

Table Summary
Information Technology
67.6%
Industrials
14.7%
Communication Services
9.4%
Financials
3.8%
Consumer Discretionary
2.5%
Utilities
0.5%
Real Estate
0.1%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Bloom Energy Corp., Class A
13.5%
Lam Research Corp.
6.8%
Marvell Technology, Inc.
5.5%
Broadcom, Inc.
4.8%
NVIDIA Corp.
4.8%
Alphabet, Inc., Class A
4.3%
Western Digital Corp.
3.8%
Applied Materials, Inc.
3.5%
Apple, Inc.
2.8%
Microsoft Corp.
2.8%
Material Fund Change [Text Block]
C000097570  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Global Technology Fund
Class Name Institutional Class
Trading Symbol CSGZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Seligman Global Technology Fund (the Fund) for the period of November 1, 2025 to April 30, 2026.
Additional Information [Text Block] You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary
Class
Cost of a $10,000 investment
Cost paid as a percentage of a $10,000 investment
Institutional Class
$57
1.00%Footnote Reference(a)
Footnote Description
Footnote(a)
Annualized
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.00% [12]
AssetsNet $ 4,182,302,682
Holdings Count | Holding 80
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Fund net assets
$4,182,302,682
Total number of portfolio holdings
80
Portfolio turnover for the reporting period
17%
Holdings [Text Block]

Information Technology Sub-Industry Allocation 

Table Summary
Semiconductors
24.4%
Semiconductor Materials & Equipment
12.0%
Technology Hardware, Storage & Peripherals
9.4%
Systems Software
8.4%
Application Software
5.3%
Communications Equipment
3.8%
Internet Services & Infrastructure
2.2%
Electronic Equipment & Instruments
1.8%
Other
0.3%

Equity Sector Allocation

Table Summary
Information Technology
67.6%
Industrials
14.7%
Communication Services
9.4%
Financials
3.8%
Consumer Discretionary
2.5%
Utilities
0.5%
Real Estate
0.1%
Largest Holdings [Text Block]

Top Holdings 

Table Summary
Bloom Energy Corp., Class A
13.5%
Lam Research Corp.
6.8%
Marvell Technology, Inc.
5.5%
Broadcom, Inc.
4.8%
NVIDIA Corp.
4.8%
Alphabet, Inc., Class A
4.3%
Western Digital Corp.
3.8%
Applied Materials, Inc.
3.5%
Apple, Inc.
2.8%
Microsoft Corp.
2.8%
Material Fund Change [Text Block]
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