Columbia Funds Series Trust II N-CSRS 3 Feb 25 Certified semi-annual shareholder report (management investment company) Financial data

Form N-CSR Cover

Form N-CSR Cover	6 Months Ended
	Nov. 30, 2024
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	Nov. 30, 2024

Shareholder Report

Shareholder Report	6 Months Ended
	Nov. 30, 2024 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	Nov. 30, 2024
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 semiannual shareholder report
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 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) Class Cost of a $10,000 investment Cost paid as a percentage of a $10,000 investment Class A $ 1.16 % (a) (a) Annualized.
Expenses Paid, Amount	$ 62
Expense Ratio, Percent	1.16%	[1]
Net Assets	$ 14,408,958,669
Holdings Count | Holding	70
Investment Company, Portfolio Turnover	19%
Additional Fund Statistics [Text Block]	Key Fund S tatis Fund net assets $ Total number of portfolio holdings 70 Portfolio turnover for the reporting period 19%
Holdings [Text Block]	Graphical Repr esenta 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 NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 % Equity Sector Allocation Information Technology Sub-industry Allocation
Largest Holdings [Text Block]	Top Holdings NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 %
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 semiannual shareholder report
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 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) Class Cost of a $10,000 inv Cost paid as a percentage of a $10,000 investment Class C $ 1.91 % (a) (a) Annualized.
Expenses Paid, Amount	$ 101
Expense Ratio, Percent	1.91%	[1]
Net Assets	$ 14,408,958,669
Holdings Count | Holding	70
Investment Company, Portfolio Turnover	19%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 70 Portfolio turnover for the reporting period 19%
Holdings [Text Block]	Graphical Representation of Fund 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 F Top Holdings NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 % Equity Sector Allocation Information Technology Sub-industry Allocation
Largest Holdings [Text Block]	Top Holdings NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 %
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 semiannual shareholder report
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 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) Class Cost of a $10,000 investment Cost paid as a percentage of a $10,000 investment Institutional Class $ 0.91 % (a) (a) Annualized.
Expenses Paid, Amount	$ 48
Expense Ratio, Percent	0.91%	[1]
Net Assets	$ 14,408,958,669
Holdings Count | Holding	70
Investment Company, Portfolio Turnover	19%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 70 Portfolio turnover for the reporting period 19%
Holdings [Text Block]	Graphical Representa tio 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 NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 % Equity Sector Allocation Information Technology Sub-industry Allocation
Largest Holdings [Text Block]	Top Holdings NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 %
Columbia Seligman Technology and Information Fund - Institutional 2 Class
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 semiannual shareholder report
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 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 F und (Based on a hypothetical $10,000 investment) Class Cost of a $10,000 investment Cost paid as a percentage of a $10,000 investment Institutional 2 Class $ 0.87 % (a) (a) Annualized.
Expenses Paid, Amount	$ 46
Expense Ratio, Percent	0.87%	[1]
Net Assets	$ 14,408,958,669
Holdings Count | Holding	70
Investment Company, Portfolio Turnover	19%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 70 Portfolio turnover for the reporting period 19%
Holdings [Text Block]	Graphical Representation of Fund 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 NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 % Equity Sector Allocation Information Technology Sub-industry Allocation
Largest Holdings [Text Block]	Top Holdings NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 %
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 semiannual shareholder report
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 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) Class Cost of a $10,000 investment Cost paid as a percentage of a $10,000 investment Institutional 3 Class $ 0.82 % (a) (a) Annualized.
Expenses Paid, Amount	$ 44
Expense Ratio, Percent	0.82%	[1]
Net Assets	$ 14,408,958,669
Holdings Count | Holding	70
Investment Company, Portfolio Turnover	19%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 70 Portfolio turnove 19%
Holdings [Text Block]	Graphical Representation of Fund 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 NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 % Equity Sector Allocation Information Technology Sub-industry Allocation
Largest Holdings [Text Block]	Top Holdings NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 %
Columbia Seligman Technology and Information Fund - Institutional 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 semiannual shareholder report
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 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) Class Cost of a $10,000 investment Cost paid as a percentage of a $10,000 investment Class R $ 1.41 % (a) (a) Annualized.
Expenses Paid, Amount	$ 75
Expense Ratio, Percent	1.41%	[1]
Net Assets	$ 14,408,958,669
Holdings Count | Holding	70
Investment Company, Portfolio Turnover	19%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total nu mbe 70 Portfolio turnover for the reporting period 19%
Holdings [Text Block]	Graphical Representation of Fund 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 NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 % Equity Sector Allocation Information Technology Sub-industry Allocation
Largest Holdings [Text Block]	Top Holdings NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 %
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 semiannual shareholder report
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 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) Class Cost of a $10,000 investment Cost paid as a percentage of a $10,000 investment Class S $ (a) 0.91 % (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 wo uld (b) Annualized.
Expenses Paid, Amount	$ 15	[2]
Expense Ratio, Percent	0.91%	[1]
Net Assets	$ 14,408,958,669
Holdings Count | Holding	70
Investment Company, Portfolio Turnover	19%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 70 Portfolio turnover for the reporting period 19%
Holdings [Text Block]	Graphical Representation of Fund The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables Top Holdings NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 % Equity Sector Allocation Information Technology Sub-industry Allocation
Largest Holdings [Text Block]	Top Holdings NVIDIA Corp. 5.7 % Bloom Energy Corp., Class A 4.9 % Broadcom, Inc. 4.8 % Apple, Inc. 4.6 % Microsoft Corp. 4.6 % Lam Research Corp. 4.3 % Alphabet, Inc., Class A 3.8 % Global Payments, Inc. 3.1 % eBay, Inc. 3.0 % Oracle Corp. 2.7 %
[1]Annualized.[2]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.

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	Nov. 30, 2024
Columbia Seligman Technology and Information Fund - Class A | NVIDIA Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Columbia Seligman Technology and Information Fund - Class A | Bloom Energy Corp., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.90%
Columbia Seligman Technology and Information Fund - Class A | Broadcom, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.80%
Columbia Seligman Technology and Information Fund - Class A | Apple, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Class A | Microsoft Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Class A | Lam Research Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.30%
Columbia Seligman Technology and Information Fund - Class A | Alphabet, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%
Columbia Seligman Technology and Information Fund - Class A | Global Payments, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Seligman Technology and Information Fund - Class A | eBay, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Seligman Technology and Information Fund - Class A | Oracle Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%
Columbia Seligman Technology and Information Fund - Class A | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	68.10%
Columbia Seligman Technology and Information Fund - Class A | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.10%
Columbia Seligman Technology and Information Fund - Class A | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.90%
Columbia Seligman Technology and Information Fund - Class A | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Columbia Seligman Technology and Information Fund - Class A | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Seligman Technology and Information Fund - Class A | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.20%
Columbia Seligman Technology and Information Fund - Class A | Semiconductors [Member]
Holdings [Line Items]
Percent of Net Asset Value	21%
Columbia Seligman Technology and Information Fund - Class A | Systems Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.50%
Columbia Seligman Technology and Information Fund - Class A | Technology Hardware, Storage & Peripherals [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.50%
Columbia Seligman Technology and Information Fund - Class A | Semiconductor Materials & Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Columbia Seligman Technology and Information Fund - Class A | Application Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.60%
Columbia Seligman Technology and Information Fund - Class A | Communications Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Columbia Seligman Technology and Information Fund - Class A | Internet Services & Infrastructure [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Seligman Technology and Information Fund - Class A | Electronic Equipment & Instruments [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
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 | NVIDIA Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Columbia Seligman Technology and Information Fund - Class C | Bloom Energy Corp., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.90%
Columbia Seligman Technology and Information Fund - Class C | Broadcom, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.80%
Columbia Seligman Technology and Information Fund - Class C | Apple, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Class C | Microsoft Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Class C | Lam Research Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.30%
Columbia Seligman Technology and Information Fund - Class C | Alphabet, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%
Columbia Seligman Technology and Information Fund - Class C | Global Payments, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Seligman Technology and Information Fund - Class C | eBay, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Seligman Technology and Information Fund - Class C | Oracle Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%
Columbia Seligman Technology and Information Fund - Class C | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	68.10%
Columbia Seligman Technology and Information Fund - Class C | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.10%
Columbia Seligman Technology and Information Fund - Class C | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.90%
Columbia Seligman Technology and Information Fund - Class C | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Columbia Seligman Technology and Information Fund - Class C | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Seligman Technology and Information Fund - Class C | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.20%
Columbia Seligman Technology and Information Fund - Class C | Semiconductors [Member]
Holdings [Line Items]
Percent of Net Asset Value	21%
Columbia Seligman Technology and Information Fund - Class C | Systems Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.50%
Columbia Seligman Technology and Information Fund - Class C | Technology Hardware, Storage & Peripherals [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.50%
Columbia Seligman Technology and Information Fund - Class C | Semiconductor Materials & Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Columbia Seligman Technology and Information Fund - Class C | Application Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.60%
Columbia Seligman Technology and Information Fund - Class C | Communications Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Columbia Seligman Technology and Information Fund - Class C | Internet Services & Infrastructure [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Seligman Technology and Information Fund - Class C | Electronic Equipment & Instruments [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
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 | NVIDIA Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Columbia Seligman Technology and Information Fund - Institutional Class | Bloom Energy Corp., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.90%
Columbia Seligman Technology and Information Fund - Institutional Class | Broadcom, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.80%
Columbia Seligman Technology and Information Fund - Institutional Class | Apple, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Institutional Class | Microsoft Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Institutional Class | Lam Research Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.30%
Columbia Seligman Technology and Information Fund - Institutional Class | Alphabet, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%
Columbia Seligman Technology and Information Fund - Institutional Class | Global Payments, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Seligman Technology and Information Fund - Institutional Class | eBay, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Seligman Technology and Information Fund - Institutional Class | Oracle Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%
Columbia Seligman Technology and Information Fund - Institutional Class | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	68.10%
Columbia Seligman Technology and Information Fund - Institutional Class | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.10%
Columbia Seligman Technology and Information Fund - Institutional Class | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.90%
Columbia Seligman Technology and Information Fund - Institutional Class | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Columbia Seligman Technology and Information Fund - Institutional Class | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Seligman Technology and Information Fund - Institutional Class | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.20%
Columbia Seligman Technology and Information Fund - Institutional Class | Semiconductors [Member]
Holdings [Line Items]
Percent of Net Asset Value	21%
Columbia Seligman Technology and Information Fund - Institutional Class | Systems Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.50%
Columbia Seligman Technology and Information Fund - Institutional Class | Technology Hardware, Storage & Peripherals [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.50%
Columbia Seligman Technology and Information Fund - Institutional Class | Semiconductor Materials & Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Columbia Seligman Technology and Information Fund - Institutional Class | Application Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.60%
Columbia Seligman Technology and Information Fund - Institutional Class | Communications Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Columbia Seligman Technology and Information Fund - Institutional Class | Internet Services & Infrastructure [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Seligman Technology and Information Fund - Institutional Class | Electronic Equipment & Instruments [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
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 | NVIDIA Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Bloom Energy Corp., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.90%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Broadcom, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.80%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Apple, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Microsoft Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Lam Research Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.30%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Alphabet, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Global Payments, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | eBay, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Oracle Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	68.10%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.10%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.90%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.20%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Semiconductors [Member]
Holdings [Line Items]
Percent of Net Asset Value	21%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Systems Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.50%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Technology Hardware, Storage & Peripherals [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.50%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Semiconductor Materials & Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Application Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.60%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Communications Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Internet Services & Infrastructure [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Electronic Equipment & Instruments [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
Columbia Seligman Technology and Information Fund - Institutional 2 Class | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.50%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | NVIDIA Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Bloom Energy Corp., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.90%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Broadcom, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.80%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Apple, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Microsoft Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Lam Research Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.30%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Alphabet, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Global Payments, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | eBay, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Oracle Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	68.10%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.10%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.90%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.20%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Semiconductors [Member]
Holdings [Line Items]
Percent of Net Asset Value	21%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Systems Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.50%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Technology Hardware, Storage & Peripherals [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.50%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Semiconductor Materials & Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Application Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.60%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Communications Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Internet Services & Infrastructure [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Seligman Technology and Information Fund - Institutional 3 Class | Electronic Equipment & Instruments [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
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 - Institutional Class R | NVIDIA Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Columbia Seligman Technology and Information Fund - Institutional Class R | Bloom Energy Corp., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.90%
Columbia Seligman Technology and Information Fund - Institutional Class R | Broadcom, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.80%
Columbia Seligman Technology and Information Fund - Institutional Class R | Apple, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Institutional Class R | Microsoft Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Institutional Class R | Lam Research Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.30%
Columbia Seligman Technology and Information Fund - Institutional Class R | Alphabet, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%
Columbia Seligman Technology and Information Fund - Institutional Class R | Global Payments, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Seligman Technology and Information Fund - Institutional Class R | eBay, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Seligman Technology and Information Fund - Institutional Class R | Oracle Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%
Columbia Seligman Technology and Information Fund - Institutional Class R | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	68.10%
Columbia Seligman Technology and Information Fund - Institutional Class R | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.10%
Columbia Seligman Technology and Information Fund - Institutional Class R | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.90%
Columbia Seligman Technology and Information Fund - Institutional Class R | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Columbia Seligman Technology and Information Fund - Institutional Class R | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Seligman Technology and Information Fund - Institutional Class R | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.20%
Columbia Seligman Technology and Information Fund - Institutional Class R | Semiconductors [Member]
Holdings [Line Items]
Percent of Net Asset Value	21%
Columbia Seligman Technology and Information Fund - Institutional Class R | Systems Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.50%
Columbia Seligman Technology and Information Fund - Institutional Class R | Technology Hardware, Storage & Peripherals [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.50%
Columbia Seligman Technology and Information Fund - Institutional Class R | Semiconductor Materials & Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Columbia Seligman Technology and Information Fund - Institutional Class R | Application Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.60%
Columbia Seligman Technology and Information Fund - Institutional Class R | Communications Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Columbia Seligman Technology and Information Fund - Institutional Class R | Internet Services & Infrastructure [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Seligman Technology and Information Fund - Institutional Class R | Electronic Equipment & Instruments [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
Columbia Seligman Technology and Information Fund - Institutional Class R | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.50%
Columbia Seligman Technology and Information Fund - Class S | NVIDIA Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.70%
Columbia Seligman Technology and Information Fund - Class S | Bloom Energy Corp., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.90%
Columbia Seligman Technology and Information Fund - Class S | Broadcom, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.80%
Columbia Seligman Technology and Information Fund - Class S | Apple, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Class S | Microsoft Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.60%
Columbia Seligman Technology and Information Fund - Class S | Lam Research Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.30%
Columbia Seligman Technology and Information Fund - Class S | Alphabet, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.80%
Columbia Seligman Technology and Information Fund - Class S | Global Payments, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Seligman Technology and Information Fund - Class S | eBay, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Seligman Technology and Information Fund - Class S | Oracle Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.70%
Columbia Seligman Technology and Information Fund - Class S | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	68.10%
Columbia Seligman Technology and Information Fund - Class S | Communications Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	13.10%
Columbia Seligman Technology and Information Fund - Class S | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.90%
Columbia Seligman Technology and Information Fund - Class S | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5.90%
Columbia Seligman Technology and Information Fund - Class S | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Seligman Technology and Information Fund - Class S | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.20%
Columbia Seligman Technology and Information Fund - Class S | Semiconductors [Member]
Holdings [Line Items]
Percent of Net Asset Value	21%
Columbia Seligman Technology and Information Fund - Class S | Systems Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	12.50%
Columbia Seligman Technology and Information Fund - Class S | Technology Hardware, Storage & Peripherals [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.50%
Columbia Seligman Technology and Information Fund - Class S | Semiconductor Materials & Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.80%
Columbia Seligman Technology and Information Fund - Class S | Application Software [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.60%
Columbia Seligman Technology and Information Fund - Class S | Communications Equipment [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.50%
Columbia Seligman Technology and Information Fund - Class S | Internet Services & Infrastructure [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Seligman Technology and Information Fund - Class S | Electronic Equipment & Instruments [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.10%
Columbia Seligman Technology and Information Fund - Class S | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.50%