v3.25.2
Shareholder Report
 12 Months Ended
May 31, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR
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 May 31, 2025
Columbia Seligman Technology and Information Fund - Class A  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Technology and Information Fund
Class Name Class A
Trading Symbol SLMCX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Columbia Seligman Technology and Information Fund (the Fund) for the period of June 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
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)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Class A
$
119		1.16
%
Expenses Paid, Amount $ 119
Expense Ratio, Percent 1.16%
Factors Affecting Performance [Text Block]
Management's Discussion of Fund Performance
The performance of Class A shares for the period presented is shown in the Average Annual Total Returns table.
Top Performance Contributors
Stock selection
| Selections in the consumer discretionary sector, communications equipment and media industries contributed to the Fund’s results most during the annual period.
Allocations
| Allocations to technology hardware storage & peripherals, electronic equipment instruments & components, industrials, broadline retail and communications equipment all contributed to relative performance.
Individual holdings
| Positions in Broadcom, Inc., a semiconductor chip manufacturer; eBay, Inc., an online retailer; F5, Inc., an application security and cloud management company; GoDaddy, Inc., an internet domain registry company; and Visa, Inc., a digital payment processor, all contributed to relative performance versus the benchmark.
Top Performance Detractors
Stock selection
 
I
 
Selections in the semiconductors & semiconductor equipment, software, technology hardware storage & peripherals and interactive media & services industries detracted from relative performance.
Allocations
| Underweight allocations to the software and IT services industries as well as an overweight allocation to the semiconductors & semiconductor equipment and financial services industries detracted from relative performance.
Individual holdings
| Fund positions in Teradyne, Inc., a semiconductor test equipment company; Meta Platforms, Inc., a multinational technology company; Synaptics, Inc., a neural network and computer to human interface company; Global Payments, Inc., a merchant payment processing company; and Lam Research Corp., a supplier of semiconductor manufacturing equipment, all detracted from relative performance during the year.
Performance Past Does Not Indicate Future [Text] The Fund's past performance is not a good predictor of the Fund's future performance.
Line Graph [Table Text Block] Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
Average Annual Total Returns (%)1 year5 years10 years
Class A (excluding sales charges)6.3319.0717.51
Class A (including sales charges)0.22 17.67 16.81
S&P North American Technology Sector Index16.5018.9119.97
Russell 3000
®
Index		13.1215.3412.21
No Deduction of Taxes [Text Block] Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares.
Updated Performance Information Location [Text Block] Visit
columbiathreadneedleus.com/investment-products/mutual-funds
for more recent performance information.
Net Assets $ 12,975,092,985
Holdings Count | Holding 64
Advisory Fees Paid, Amount $ 108,081,392
Investment Company, Portfolio Turnover 33.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
12,975,092,985
Total number of portfolio holdings
64
Management services fees
(represents 0.81% of Fund average net assets)
$
108,081,392
Portfolio turnover for the reporting period
33%
Holdings [Text Block]
Graphical Representation of Fund
 
Holdings
The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
Equity Sector Allocation
Graphical Representation - Allocation 1 Chart
Information Technology Sub-industry Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
 Columbia Seligman Technology and Information Fund - Class C  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Technology and Information Fund
Class Name Class C
Trading Symbol SCICX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Columbia Seligman Technology and Information Fund (the Fund) for the period of June 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
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)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Class C
$
196		1.91
%
Expenses Paid, Amount $ 196
Expense Ratio, Percent 1.91%
Factors Affecting Performance [Text Block]
Management's Discussion of Fund Performance
The performance of Class C shares for the period presented is shown in the Average Annual Total Returns table.
Top Performance Contributors
Stock selection
| Selections in the consumer discretionary sector, communications equipment and media industries contributed to the Fund’s results most during the annual period.
Allocations
| Allocations to technology hardware storage & peripherals, electronic equipment instruments & components, industrials, broadline retail and communications equipment all contributed to relative performance.
Individual holdings
| Positions in Broadcom, Inc., a semiconductor chip manufacturer; eBay, Inc., an online retailer; F5, Inc., an application security and cloud management company; GoDaddy, Inc., an internet domain registry company; and Visa, Inc., a digital payment processor, all contributed to relative performance versus the benchmark.
Top Performance Detractors
Stock selection
 
I
 
Selections in the semiconductors & semiconductor equipment, software, technology hardware storage & peripherals and interactive media & services industries detracted from relative performance.
Allocations
| Underweight allocations to the software and IT services industries as well as an overweight allocation to the semiconductors & semiconductor equipment and financial services industries detracted from relative performance.
Individual holdings
| Fund positions in Teradyne, Inc., a semiconductor test equipment company; Meta Platforms, Inc., a multinational technology company; Synaptics, Inc., a neural network and computer to human interface company; Global Payments, Inc., a merchant payment processing company; and Lam Research Corp., a supplier of semiconductor manufacturing equipment, all detracted from relative performance during the year.
Performance Past Does Not Indicate Future [Text] The Fund's past performance is not a good predictor of the Fund's future performance.
Line Graph [Table Text Block] Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
Average Annual Total Returns (%)1 year5 years10 years
Class C (excluding sales charges)5.5418.1916.63
Class C (including sales charges)4.76 18.19 16.63
S&P North American Technology Sector Index16.5018.9119.97
Russell 3000
®
Index		13.1215.3412.21
No Deduction of Taxes [Text Block] Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares.
Updated Performance Information Location [Text Block] Visit
columbiathreadneedleus.com/investment-products/mutual-funds
for more recent performance information.
Net Assets $ 12,975,092,985
Holdings Count | Holding 64
Advisory Fees Paid, Amount $ 108,081,392
Investment Company, Portfolio Turnover 33.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
12,975,092,985
Total number of portfolio holdings
64
Management services fees
(represents 0.81% of Fund average net assets)
$
108,081,392
Portfolio turnover for the reporting period
33%
Holdings [Text Block]
Graphical Representation of Fund
 
Holdings
The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
Equity Sector Allocation
Graphical Representation - Allocation 1 Chart
Information Technology Sub-industry Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
 Columbia Seligman Technology and Information Fund - Institutional Class  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Technology and Information Fund
Class Name Institutional Class
Trading Symbol CCIZX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Columbia Seligman Technology and Information Fund (the Fund) for the period of June 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
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)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Institutional Class
$
94		0.91
%
Expenses Paid, Amount $ 94
Expense Ratio, Percent 0.91%
Factors Affecting Performance [Text Block]
Management's Discussion of Fund Performance
The performance of Institutional Class shares for the period presented is shown in the Average Annual Total Returns table.
Top Performance Contributors
Stock selection
| Selections in the consumer discretionary sector, communications equipment and media industries contributed to the Fund’s results most during the annual period.
Allocations
| Allocations to technology hardware storage & peripherals, electronic equipment instruments & components, industrials, broadline retail and communications equipment all contributed to relative performance.
Individual holdings
| Positions in Broadcom, Inc., a semiconductor chip manufacturer; eBay, Inc., an online retailer; F5, Inc., an application security and cloud management company; GoDaddy, Inc., an internet domain registry company; and Visa, Inc., a digital payment processor, all contributed to relative performance versus the benchmark.
Top Performance Detractors
Stock selection
 
I
 
Selections in the semiconductors & semiconductor equipment, software, technology hardware storage & peripherals and interactive media & services industries detracted from relative performance.
Allocations
| Underweight allocations to the software and IT services industries as well as an overweight allocation to the semiconductors & semiconductor equipment and financial services industries detracted from relative performance.
Individual holdings
| Fund positions in Teradyne, Inc., a semiconductor test equipment company; Meta Platforms, Inc., a multinational technology company; Synaptics, Inc., a neural network and computer to human interface company; Global Payments, Inc., a merchant payment processing company; and Lam Research Corp., a supplier of semiconductor manufacturing equipment, all detracted from relative performance during the year.
Performance Past Does Not Indicate Future [Text] The Fund's past performance is not a good predictor of the Fund's future performance.
Line Graph [Table Text Block] Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
Average Annual Total Returns (%)1 year5 years10 years
Institutional Class6.60 19.37 17.80
S&P North American Technology Sector Index16.5018.9119.97
Russell 3000
®
Index		13.12 15.34 12.21
No Deduction of Taxes [Text Block] Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares.
Updated Performance Information Location [Text Block] Visit
columbiathreadneedleus.com/investment-products/mutual-funds
for more recent performance information.
Net Assets $ 12,975,092,985
Holdings Count | Holding 64
Advisory Fees Paid, Amount $ 108,081,392
Investment Company, Portfolio Turnover 33.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
12,975,092,985
Total number of portfolio holdings
64
Management services fees
(represents 0.81% of Fund average net assets)
$
108,081,392
Portfolio turnover for the reporting period
33%
Holdings [Text Block]
Graphical Representation of Fund
 
Holdings
The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
Equity Sector Allocation
Graphical Representation - Allocation 1 Chart
Information Technology Sub-industry Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
Columbia Seligman Technology and Information Fund - Institutional 2 Class [Member]  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Technology and Information Fund
Class Name Institutional 2 Class
Trading Symbol SCMIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Columbia Seligman Technology and Information Fund (the Fund) for the period of June 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
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)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Institutional 2 Class
$
90		0.87
%
Expenses Paid, Amount $ 90
Expense Ratio, Percent 0.87%
Factors Affecting Performance [Text Block]
Management's Discussion of Fund Performance
The performance of Institutional 2 Class shares for the period presented is shown in the Average Annual Total Returns table.
Top Performance Contributors
Stock selection
| Selections in the consumer discretionary sector, communications equipment and media industries contributed to the Fund’s results most during the annual period.
Allocations
| Allocations to technology hardware storage & peripherals, electronic equipment instruments & components, industrials, broadline retail and communications equipment all contributed to relative performance.
Individual holdings
| Positions in Broadcom, Inc., a semiconductor chip manufacturer; eBay, Inc., an online retailer; F5, Inc., an application security and cloud management company; GoDaddy, Inc., an internet domain registry company; and Visa, Inc., a digital payment processor, all contributed to relative performance versus the benchmark.
Top Performance Detractors
Stock selection
 
I
 
Selections in the semiconductors & semiconductor equipment, software, technology hardware storage & peripherals and interactive media & services industries detracted from relative performance.
Allocations
| Underweight allocations to the software and IT services industries as well as an overweight allocation to the semiconductors & semiconductor equipment and financial services industries detracted from relative performance.
Individual holdings
| Fund positions in Teradyne, Inc., a semiconductor test equipment company; Meta Platforms, Inc., a multinational technology company; Synaptics, Inc., a neural network and computer to human interface company; Global Payments, Inc., a merchant payment processing company; and Lam Research Corp., a supplier of semiconductor manufacturing equipment, all detracted from relative performance during the year.
Performance Past Does Not Indicate Future [Text] The Fund's past performance is not a good predictor of the Fund's future performance.
Line Graph [Table Text Block] Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
Average Annual Total Returns (%)1 year5 years10 years
Institutional 2 Class6.63 19.41 17.86
S&P North American Technology Sector Index16.5018.9119.97
Russell 3000
®
Index		13.1215.3412.21
No Deduction of Taxes [Text Block] Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares.
Updated Performance Information Location [Text Block] Visit
columbiathreadneedleus.com/investment-products/mutual-funds
for more recent perfo
rm
ance information.
Net Assets $ 12,975,092,985
Holdings Count | Holding 64
Advisory Fees Paid, Amount $ 108,081,392
Investment Company, Portfolio Turnover 33.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
12,975,092,985
Total number of portfolio holdings
64
Management services fees
(represents 0.81% of Fund average net assets)
$
108,081,392
Portfolio turnover for the reporting period
33%
Holdings [Text Block]
Graphical Representation of Fund
 
Holdings
The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
Equity Sector Allocation
Graphical Representation - Allocation 1 Chart
Information Technology Sub-industry Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
Columbia Seligman Technology and Information Fund Institutional 3 Class  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Technology and Information Fund
Class Name Institutional 3 Class
Trading Symbol CCOYX
Annual or Semi-Annual Statement [Text Block] This
annual shareholder report
contains important information about Columbia Seligman Technology and Information Fund (the Fund) for the period of June 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
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)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Institutional 3 Class
$
86		0.83
%
Expenses Paid, Amount $ 86
Expense Ratio, Percent 0.83%
Factors Affecting Performance [Text Block]
Management's Discussion of Fund Performance
The performance of Institutional 3 Class shares for the period presented is shown in the Average Annual Total Returns table.
Top Performance Contributors
Stock selection
| Selections in the consumer discretionary sector, communications equipment and media industries contributed to the Fund’s results most during the annual period.
Allocations
| Allocations to technology hardware storage & peripherals, electronic equipment instruments & components, industrials, broadline retail and communications equipment all contributed to relative performance.
Individual holdings
| Positions in Broadcom, Inc., a semiconductor chip manufacturer; eBay, Inc., an online retailer; F5, Inc., an application security and cloud management company; GoDaddy, Inc., an internet domain registry company; and Visa, Inc., a digital payment processor, all contributed to relative performance versus the benchmark.
Top Performance Detractors
Stock selection
 
I
 
Selections in the semiconductors & semiconductor equipment, software, technology hardware storage & peripherals and interactive media & services industries detracted from relative performance.
Allocations
| Underweight allocations to the software and IT services industries as well as an overweight allocation to the semiconductors & semiconductor equipment and financial services industries detracted from relative performance.
Individual holdings
| Fund positions in Teradyne, Inc., a semiconductor test equipment company; Meta Platforms, Inc., a multinational technology company; Synaptics, Inc., a neural network and computer to human interface company; Global Payments, Inc., a merchant payment processing company; and Lam Research Corp., a supplier of semiconductor manufacturing equipment, all detracted from relative performance during the year.
Performance Past Does Not Indicate Future [Text] The Fund's past performance is not a good predictor of the Fund's future performance.
Line Graph [Table Text Block] Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
Average Annual Total Returns (%)1 year5 years10 years
Institutional 3
Class
(a)
6.6819.4717.84
S&P North American Technology Sector Index16.5018.9119.97
Russell 3000
®
Index		13.1215.3412.21
(a)
The returns shown for periods prior to March 1, 2017 (including Since Fund Inception returns, if shown) include the returns of Class A. 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.
No Deduction of Taxes [Text Block] Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares.
Updated Performance Information Location [Text Block] Visit
columbiathreadneedleus.com/investment-products/mutual-funds
for more recent performance information.
Net Assets $ 12,975,092,985
Holdings Count | Holding 64
Advisory Fees Paid, Amount $ 108,081,392
Investment Company, Portfolio Turnover 33.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net a
sset
s
$
12,975,092,985
Total number of portfolio holdings
64
Management services fees
(represents 0.81% of Fund average net assets)
$
108,081,392
Portfolio turnover for the reporting period
33%
Holdings [Text Block]
Graphical Representation of Fund
 
Holdings
The tables below show the inve
stment m
akeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwis
e noted. The
Fund's portfolio composition is subject to change.
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
Equity Sector Allocation
Graphical Representation - Allocation 1 Chart
Information Technology Sub-industry Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
Columbia Seligman Technology and Information Fund -Class R  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Technology and Information Fund
Class Name Class R
Trading Symbol SCIRX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Columbia Seligman Technology and Information Fund (the Fund) for the period of June 1, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
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)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Class R
$
145		1.41
%
Expenses Paid, Amount $ 145
Expense Ratio, Percent 1.41%
Factors Affecting Performance [Text Block]
Management's Discussion of Fund Performance
The performance of Class R shares for the period presented is shown in the Average Annual Total Returns table.
Top Performance Contributors
Stock selection
| Selections in the consumer discretionary sector, communications equipment and media industries contributed to the Fund’s results most during the annual period.
Allocations
| Allocations to technology hardware storage & peripherals, electronic equipment instruments & components, industrials, broadline retail and communications equipment all contributed to relative performance.
Individual holdings
| Positions in Broadcom, Inc., a semiconductor chip manufacturer; eBay, Inc., an online retailer; F5, Inc., an application security and cloud management company; GoDaddy, Inc., an internet domain registry company; and Visa, Inc., a digital payment processor, all contributed to relative performance versus the benchmark.
Top Performance Detractors
Stock selection
 
I
 
Selections in the semiconductors & semiconductor equipment, software, technology hardware storage & peripherals and interactive media & services industries detracted from relative performance.
Allocations
| Underweight allocations to the software and IT services industries as well as an overweight allocation to the semiconductors & semiconductor equipment and financial services industries detracted from relative performance.
Individual holdings
| Fund positions in Teradyne, Inc., a semiconductor test equipment company; Meta Platforms, Inc., a multinational technology company; Synaptics, Inc., a neural network and computer to human interface company; Global Payments, Inc., a merchant payment processing company; and Lam Research Corp., a supplier of semiconductor manufacturing equipment, all detracted from relative performance during the year.
Performance Past Does Not Indicate Future [Text] The Fund's past performance is not a good predictor of the Fund's future performance.
Line Graph [Table Text Block] Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
Average Annual Total Returns (%)1 year5 years10 years
Class R6.06 18.78 17.21
S&P North American Technology Sector Index16.5018.9119.97
Russell 3000
®
Index		13.1215.3412.21
No Deduction of Taxes [Text Block] Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares.
Updated Performance Information Location [Text Block] Visit
columbiathreadneedleus.com/investment-products/mutual-funds
for more recent performance information.
Net Assets $ 12,975,092,985
Holdings Count | Holding 64
Advisory Fees Paid, Amount $ 108,081,392
Investment Company, Portfolio Turnover 33.00%
Additional Fund Statistics [Text Block]
Fund net assets
$
12,975,092,985
Total number of portfolio holdings
64
Management services fees
(represents 0.81% of Fund average net assets)
$
108,081,392
Portfolio turnover for the reporting period
33%
Holdings [Text Block]
Graphical Representation of Fund
 
Holdings
The tables below show the investment makeup of the Fu
nd repre
sented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's po
rtfolio co
mposition is subject to change.
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
Equity Sector Allocation
Graphical Representation - Allocation 1 Chart
Information Technology Sub-industry Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
Columbia Seligman Technology and Information Fund -Class S  
Shareholder Report [Line Items]  
Fund Name Columbia Seligman Technology and Information Fund
Class Name Class S
Trading Symbol CCIFX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about Columbia Seligman Technology and Information Fund (the Fund) for the period of October 2, 2024 to May 31, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
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)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Class S
$
61
(a)
0.92
%
(b)
(a)
Based on operations from October 2, 2024 (commencement of operations) through the stated period end. Had the class been open for the entire reporting period, expenses shown in the table above would have been higher.
(b)
Annualized.
Expenses Paid, Amount $ 61 [1]
Expense Ratio, Percent 0.92% [2]
Factors Affecting Performance [Text Block]
Management's Discussion of Fund Performance
The performance of Class S shares for the period presented is shown in the Average Annual Total Returns table.
Top Performance Contributors
Stock selection
| Selections in the consumer discretionary sector, communications equipment and media industries contributed to the Fund’s results most during the annual period.
Allocations
| Allocations to technology hardware storage & peripherals, electronic equipment instruments & components, industrials, broadline retail and communications equipment all contributed to relative performance.
Individual holdings
| Positions in Broadcom, Inc., a semiconductor chip manufacturer; eBay, Inc., an online retailer; F5, Inc., an application security and cloud management company; GoDaddy, Inc., an internet domain registry company; and Visa, Inc., a digital payment processor, all contributed to relative performance versus the benchmark.
Top Performance Detractors
Stock selection
 
I
 
Selections in the semiconductors & semiconductor equipment, software, technology hardware storage & peripherals and interactive media & services industries detracted from relative performance.
Allocations
| Underweight allocations to the software and IT services industries as well as an overweight allocation to the semiconductors & semiconductor equipment and financial services industries detracted from relative performance.
Individual holdings
| Fund positions in Teradyne, Inc., a semiconductor test equipment company; Meta Platforms, Inc., a multinational technology company; Synaptics, Inc., a neural network and computer to human interface company; Global Payments, Inc., a merchant payment processing company; and Lam Research Corp., a supplier of semiconductor manufacturing equipment, all detracted from relative performance during the year.
Performance Past Does Not Indicate Future [Text] The Fund's past performance is not a good predictor of the Fund's future performance.
Line Graph [Table Text Block] Fund Performance - Growth of 10K
Average Annual Return [Table Text Block]
Average Annual Total Returns (%)1 year5 years10 years
Class
S
(a)
6.50 19.11 17.53
S&P North American Technology Sector Index16.5018.9119.97
Russell 3000
®
Index		13.1215.3412.21
(a)
The returns shown for periods prior to October 2, 2024 (including Since Fund Inception returns, if shown) include the returns of Class A. 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.
No Deduction of Taxes [Text Block] Performance does not reflect the deduction of taxes that a shareholder may pay on fund distributions or on the redemptions of fund shares.
Updated Performance Information Location [Text Block] Visit
columbiathreadneedleus.com/investment-products/mutual-funds
for more recent performance information.
Net Assets $ 12,975,092,985
Holdings Count | Holding 64
Advisory Fees Paid, Amount $ 108,081,392
Investment Company, Portfolio Turnover 33.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
12,975,092,985
Total number of portfolio holdings
64
Management services fees
(represents 0.81% of Fund average net assets)
$
108,081,392
Portfolio turnover for the reporting period
33%
Holdings [Text Block]
Graphical Representation of Fund
 
Holdings
The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless ot
herwise not
ed. The Fund's portfolio composition is subject to change.
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
Equity Sector Allocation
Graphical Representation - Allocation 1 Chart
Information Technology Sub-industry Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
Broadcom, Inc.6.8
%
NVIDIA Corp.5.8
%
Lam Research Corp.5.6
%
Microsoft Corp.5.6
%
Alphabet, Inc., Class A4.3
%
Bloom Energy Corp., Class A3.9
%
Apple, Inc.3.5
%
Visa, Inc., Class A3.3
%
Applied Materials, Inc.3.0
%
Meta Platforms, Inc., Class A2.8
%
[1] Based on operations from October 2, 2024 (commencement of operations) through the stated period end. Had the class been open for the entire reporting period, expenses shown in the table above would have been higher.
[2] Annualized.