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 Select Small Cap Value Fund - Class A [Member]
Shareholder Report [Line Items]
Fund Name	Columbia Select Small Cap Value Fund
Class Name	Class A
Trading Symbol	SSCVX
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 $ 1.24 % (a) (a) Annualized.
Expenses Paid, Amount	$ 67
Expense Ratio, Percent	1.24%	[1]
Net Assets	$ 465,756,824
Holdings Count | Holding	56
Investment Company, Portfolio Turnover	18%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 56 Portfolio turnover for the reporting period 18%
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 Axos Financial, Inc. 3.6 % MACOM Technology Solutions Holdings, Inc. 3.1 % Kontoor Brands, Inc. 3.1 % Stock Yards Bancorp, Inc. 2.8 % Skyward Specialty Insurance Group, Inc. 2.5 % Kemper Corp. 2.5 % KB Home 2.5 % Portland General Electric Co. 2.5 % Radian Group, Inc. 2.4 % Atlantic Union Bankshares Corp. 2.4 % Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings Axos Financial, Inc. 3.6 % MACOM Technology Solutions Holdings, Inc. 3.1 % Kontoor Brands, Inc. 3.1 % Stock Yards Bancorp, Inc. 2.8 % Skyward Specialty Insurance Group, Inc. 2.5 % Kemper Corp. 2.5 % KB Home 2.5 % Portland General Electric Co. 2.5 % Radian Group, Inc. 2.4 % Atlantic Union Bankshares Corp. 2.4 %
Columbia Select Small Cap Value Fund - Institutional Class [Member]
Shareholder Report [Line Items]
Fund Name	Columbia Select Small Cap Value Fund
Class Name	Institutional Class
Trading Symbol	CSSZX
Annual or Semi-Annual Statement [Text Block]	This semiannual shareholder
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 $ 0.99 % (a) (a) Annualized.
Expenses Paid, Amount	$ 54
Expense Ratio, Percent	0.99%	[1]
Net Assets	$ 465,756,824
Holdings Count | Holding	56
Investment Company, Portfolio Turnover	18%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 56 Portfolio turnover for the reporting period 18%
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 Axos Financial, Inc. 3.6 % MACOM Technology Solutions Holdings, Inc. 3.1 % Kontoor Brands, Inc. 3.1 % Stock Yards Bancorp, Inc. 2.8 % Skyward Specialty Insurance Group, Inc. 2.5 % Kemper Corp. 2.5 % KB Home 2.5 % Portland General Electric Co. 2.5 % Radian Group, Inc. 2.4 % Atlantic Union Bankshares Corp. 2.4 % Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings Axos Financial, Inc. 3.6 % MACOM Technology Solutions Holdings, Inc. 3.1 % Kontoor Brands, Inc. 3.1 % Stock Yards Bancorp, Inc. 2.8 % Skyward Specialty Insurance Group, Inc. 2.5 % Kemper Corp. 2.5 % KB Home 2.5 % Portland General Electric Co. 2.5 % Radian Group, Inc. 2.4 % Atlantic Union Bankshares Corp. 2.4 %
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member]
Shareholder Report [Line Items]
Fund Name	Columbia Select Small Cap Value Fund
Class Name	Institutional 2 Class
Trading Symbol	SSVIX
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 2 Class $ 0.93 % (a) (a) Annualized.
Expenses Paid, Amount	$ 50
Expense Ratio, Percent	0.93%	[1]
Net Assets	$ 465,756,824
Holdings Count | Holding	56
Investment Company, Portfolio Turnover	18%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 56 Portfolio turnover for the reporting period 18%
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 Axos Financial, Inc. 3.6 % MACOM Technology Solutions Holdings, Inc. 3.1 % Kontoor Brands, Inc. 3.1 % Stock Yards Bancorp, Inc. 2.8 % Skyward Specialty Insurance Group, Inc. 2.5 % Kemper Corp. 2.5 % KB Home 2.5 % Portland General Electric Co. 2.5 % Radian Group, Inc. 2.4 % Atlantic Union Bankshares Corp. 2.4 % Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings Axos Financial, Inc. 3.6 % MACOM Technology Solutions Holdings, Inc. 3.1 % Kontoor Brands, Inc. 3.1 % Stock Yards Bancorp, Inc. 2.8 % Skyward Specialty Insurance Group, Inc. 2.5 % Kemper Corp. 2.5 % KB Home 2.5 % Portland General Electric Co. 2.5 % Radian Group, Inc. 2.4 % Atlantic Union Bankshares Corp. 2.4 %
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member]
Shareholder Report [Line Items]
Fund Name	Columbia Select Small Cap Value Fund
Class Name	Institutional 3 Class
Trading Symbol	CSSYX
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 $ 0.88 % (a) (a) Annualized.
Expenses Paid, Amount	$ 48
Expense Ratio, Percent	0.88%	[1]
Net Assets	$ 465,756,824
Holdings Count | Holding	56
Investment Company, Portfolio Turnover	18%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 56 Portfolio turnover for the reporting period 18%
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 Axos Financial, Inc. 3.6 % MACOM Technology Solutions Holdings, Inc. 3.1 % Kontoor Brands, Inc. 3.1 % Stock Yards Bancorp, Inc. 2.8 % Skyward Specialty Insurance Group, Inc. 2.5 % Kemper Corp. 2.5 % KB Home 2.5 % Portland General Electric Co. 2.5 % Radian Group, Inc. 2.4 % Atlantic Union Bankshares Corp. 2.4 % Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings Axos Financial, Inc. 3.6 % MACOM Technology Solutions Holdings, Inc. 3.1 % Kontoor Brands, Inc. 3.1 % Stock Yards Bancorp, Inc. 2.8 % Skyward Specialty Insurance Group, Inc. 2.5 % Kemper Corp. 2.5 % KB Home 2.5 % Portland General Electric Co. 2.5 % Radian Group, Inc. 2.4 % Atlantic Union Bankshares Corp. 2.4 %
[1]Annualized.

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	Nov. 30, 2024
Columbia Select Small Cap Value Fund - Class A [Member] | Axos Financial, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.60%
Columbia Select Small Cap Value Fund - Class A [Member] | MACOM Technology Solutions Holdings, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Select Small Cap Value Fund - Class A [Member] | Kontoor Brands, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Select Small Cap Value Fund - Class A [Member] | Stock Yards Bancorp, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Small Cap Value Fund - Class A [Member] | Skyward Specialty Insurance Group, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Class A [Member] | Kemper Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Class A [Member] | KB Home [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Class A [Member] | Portland General Electric Co. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Class A [Member] | Radian Group, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Small Cap Value Fund - Class A [Member] | Atlantic Union Bankshares Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Small Cap Value Fund - Class A [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	32%
Columbia Select Small Cap Value Fund - Class A [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.80%
Columbia Select Small Cap Value Fund - Class A [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.30%
Columbia Select Small Cap Value Fund - Class A [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.10%
Columbia Select Small Cap Value Fund - Class A [Member] | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.80%
Columbia Select Small Cap Value Fund - Class A [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.30%
Columbia Select Small Cap Value Fund - Class A [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.20%
Columbia Select Small Cap Value Fund - Class A [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.10%
Columbia Select Small Cap Value Fund - Class A [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Class A [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2%
Columbia Select Small Cap Value Fund - Class A [Member] | Common Stocks [Member]
Holdings [Line Items]
Percent of Net Asset Value	99.10%
Columbia Select Small Cap Value Fund - Class A [Member] | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.80%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Axos Financial, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.60%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | MACOM Technology Solutions Holdings, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Kontoor Brands, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Stock Yards Bancorp, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Skyward Specialty Insurance Group, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Kemper Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | KB Home [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Portland General Electric Co. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Radian Group, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Atlantic Union Bankshares Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	32%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.80%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.30%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.10%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.80%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.30%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.20%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.10%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Common Stocks [Member]
Holdings [Line Items]
Percent of Net Asset Value	99.10%
Columbia Select Small Cap Value Fund - Institutional Class [Member] | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.80%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Axos Financial, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.60%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | MACOM Technology Solutions Holdings, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Kontoor Brands, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Stock Yards Bancorp, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Skyward Specialty Insurance Group, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Kemper Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | KB Home [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Portland General Electric Co. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Radian Group, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Atlantic Union Bankshares Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	32%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.80%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.30%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.10%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.80%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.30%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.20%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.10%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Common Stocks [Member]
Holdings [Line Items]
Percent of Net Asset Value	99.10%
Columbia Select Small Cap Value Fund - Institutional 2 Class [Member] | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.80%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Axos Financial, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.60%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | MACOM Technology Solutions Holdings, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Kontoor Brands, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.10%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Stock Yards Bancorp, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Skyward Specialty Insurance Group, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Kemper Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | KB Home [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Portland General Electric Co. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Radian Group, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Atlantic Union Bankshares Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	32%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	14.80%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	11.30%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.10%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.80%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.30%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	7.20%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.10%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.50%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	2%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Common Stocks [Member]
Holdings [Line Items]
Percent of Net Asset Value	99.10%
Columbia Select Small Cap Value Fund - Institutional 3 Class [Member] | Other [Member]
Holdings [Line Items]
Percent of Net Asset Value	0.80%