v3.25.2
Shareholder Report
 6 Months Ended
Apr. 30, 2025
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, 2025
Columbia Seligman Global Technology Fund - Class A  
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, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual semi-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
$
61		1.26
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 61
Expense Ratio, Percent 1.26% [1]
Net Assets $ 2,128,392,277
Holdings Count | Holding 68
Investment Company, Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
2,128,392,277
Total number of portfolio holdings68
Portfolio turnover for the reporting period11%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
Columbia Seligman Global Technology Fund - Class C  
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, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual semi-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
$
96		2.01
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 96
Expense Ratio, Percent 2.01% [1]
Net Assets $ 2,128,392,277
Holdings Count | Holding 68
Investment Company, Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
2,128,392,277
Total number of portfolio holdings68
Portfolio turnover for the reporting period11%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
Columbia Seligman Global Technology Fund - Institutional Class  
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, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual semi-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
$
49		1.01
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 49
Expense Ratio, Percent 1.01% [1]
Net Assets $ 2,128,392,277
Holdings Count | Holding 68
Investment Company, Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
2,128,392,277
Total number of portfolio holdings68
Portfolio turnover for the reporting period11%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
Columbia Seligman Global Technology Fund - Institutional 2 Class  
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, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual semi-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
$
46		0.96
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.96% [1]
Net Assets $ 2,128,392,277
Holdings Count | Holding 68
Investment Company, Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
2,128,392,277
Total number of portfolio holdings68
Portfolio turnover for the reporting period11%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
Columbia Seligman Global Technology Fund - Institutional 3 Class  
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, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual semi-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
$
44		0.91
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.91% [1]
Net Assets $ 2,128,392,277
Holdings Count | Holding 68
Investment Company, Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
2,128,392,277
Total number of portfolio holdings68
Portfolio turnover for the reporting period11%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
Columbia Seligman Global Technology Fund - Class R  
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, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual semi-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
$
73		1.51
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 73
Expense Ratio, Percent 1.51% [1]
Net Assets $ 2,128,392,277
Holdings Count | Holding 68
Investment Company, Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
2,128,392,277
Total number of portfolio holdings68
Portfolio turnover for the reporting period11%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
Columbia Seligman Global Technology Fund - Class S  
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, 2024 to April 30, 2025.
Shareholder Report Annual or Semi-Annual semi-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
$
49		1.01
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 49
Expense Ratio, Percent 1.01% [1]
Net Assets $ 2,128,392,277
Holdings Count | Holding 68
Investment Company, Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
Fund net assets
$
2,128,392,277
Total number of portfolio holdings68
Portfolio turnover for the reporting period11%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
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.5.8
%
Lam Research Corp.5.2
%
NVIDIA Corp.5.2
%
Microsoft Corp.5.1
%
Alphabet, Inc., Class A4.3
%
Apple, Inc.4.1
%
Bloom Energy Corp., Class A3.7
%
Visa, Inc., Class A3.1
%
Applied Materials, Inc.2.9
%
Oracle Corp.2.6
%
[1] Annualized.