Columbia Funds Series Trust N-CSRS 5 Nov 24 Certified semi-annual shareholder report (management investment company) Financial data

Form N-CSR Cover

Form N-CSR Cover	6 Months Ended
	Aug. 31, 2024
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	Columbia Funds Series Trust
Entity Central Index Key	0001097519
Entity Investment Company Type	N-1A
Document Period End Date	Aug. 31, 2024

Shareholder Report

Shareholder Report	6 Months Ended
	Aug. 31, 2024 USD ($) Holding
Shareholder Report [Line Items]
Document Type	N-CSRS
Amendment Flag	false
Registrant Name	Columbia Funds Series Trust
Entity Central Index Key	0001097519
Entity Investment Company Type	N-1A
Document Period End Date	Aug. 31, 2024
Columbia Select Mid Cap Value Fund - Class A
Shareholder Report [Line Items]
Fund Name	Columbia Select Mid Cap Value Fund
Class Name	Class A
Trading Symbol	CMUAX
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 $ 1.12 %
Expenses Paid, Amount	$ 59
Expense Ratio, Percent	1.12%
Net Assets	$ 2,622,817,320
Holdings Count | Holding	50
Investment Company, Portfolio Turnover	5%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 50 Portfolio turnover for the reporting period 5%
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 AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 % Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 %
Columbia Select Mid Cap Value Fund - Advisor Class
Shareholder Report [Line Items]
Fund Name	Columbia Select Mid Cap Value Fund
Class Name	Advisor Class
Trading Symbol	CFDRX
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 Advisor Class $ 0.88 %
Expenses Paid, Amount	$ 47
Expense Ratio, Percent	0.88%
Net Assets	$ 2,622,817,320
Holdings Count | Holding	50
Investment Company, Portfolio Turnover	5%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 50 Portfolio turnover for the reporting period 5%
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 Top Holdings AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 % Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 %
Columbia Select Mid Cap Value Fund - Class C
Shareholder Report [Line Items]
Fund Name	Columbia Select Mid Cap Value Fund
Class Name	Class C
Trading Symbol	CMUCX
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 C $ 1.87 %
Expenses Paid, Amount	$ 99
Expense Ratio, Percent	1.87%
Net Assets	$ 2,622,817,320
Holdings Count | Holding	50
Investment Company, Portfolio Turnover	5%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 50 Portfolio turnover for the reporting period 5%
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 Top Holdings AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 % Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 %
Columbia Select Mid Cap Value Fund Institutional Class
Shareholder Report [Line Items]
Fund Name	Columbia Select Mid Cap Value Fund
Class Name	Institutional Class
Trading Symbol	NAMAX
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 $ 0.88 %
Expenses Paid, Amount	$ 47
Expense Ratio, Percent	0.88%
Net Assets	$ 2,622,817,320
Holdings Count | Holding	50
Investment Company, Portfolio Turnover	5%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 50 Portfolio turnover for the reporting period 5%
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 AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 % Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 %
Columbia Select Mid Cap Value Fund - Institutional 2 Class
Shareholder Report [Line Items]
Fund Name	Columbia Select Mid Cap Value Fund
Class Name	Institutional 2 Class
Trading Symbol	CVERX
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 $ 0.79 %
Expenses Paid, Amount	$ 42
Expense Ratio, Percent	0.79%
Net Assets	$ 2,622,817,320
Holdings Count | Holding	50
Investment Company, Portfolio Turnover	5%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 50 Portfolio turnover for the reporting period 5%
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 AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 % Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 %
Columbia Select Mid Cap Value Fund - Institutional 3 Class
Shareholder Report [Line Items]
Fund Name	Columbia Select Mid Cap Value Fund
Class Name	Institutional 3 Class
Trading Symbol	CMVYX
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 $ 0.74 %
Expenses Paid, Amount	$ 39
Expense Ratio, Percent	0.74%
Net Assets	$ 2,622,817,320
Holdings Count | Holding	50
Investment Company, Portfolio Turnover	5%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 50 Portfolio turnover for the reporting period 5%
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 AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 % Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 %
Columbia Select Mid Cap Value Fund - Class R
Shareholder Report [Line Items]
Fund Name	Columbia Select Mid Cap Value Fund
Class Name	Class R
Trading Symbol	CMVRX
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 $ 1.37 %
Expenses Paid, Amount	$ 73
Expense Ratio, Percent	1.37%
Net Assets	$ 2,622,817,320
Holdings Count | Holding	50
Investment Company, Portfolio Turnover	5%
Additional Fund Statistics [Text Block]	Key Fund Statistics Fund net assets $ Total number of portfolio holdings 50 Portfolio turnover for the reporting period 5%
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 Top Holdings AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 % Asset Categories Equity Sector Allocation
Largest Holdings [Text Block]	Top Holdings AMETEK, Inc. 3.0 % CACI International, Inc., Class A 2.9 % Ingersoll Rand, Inc. 2.8 % ITT, Inc. 2.8 % Marathon Petroleum Corp. 2.8 % Entergy Corp. 2.6 % Corning, Inc. 2.4 % D.R. Horton, Inc. 2.4 % Reinsurance Group of America, Inc. 2.4 % Welltower, Inc. 2.3 %

Shareholder Report, Holdings (D

Shareholder Report, Holdings (Details)	Aug. 31, 2024
Columbia Select Mid Cap Value Fund - Class R | AMETEK, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Select Mid Cap Value Fund - Class R | CACI International, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.90%
Columbia Select Mid Cap Value Fund - Class R | Ingersoll Rand, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Class R | ITT, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Class R | Marathon Petroleum Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Class R | Entergy Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Select Mid Cap Value Fund - Class R | Corning, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Class R | D.R. Horton, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Class R | Reinsurance Group of America, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Class R | Welltower, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Columbia Select Mid Cap Value Fund - Class R | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.90%
Columbia Select Mid Cap Value Fund - Class R | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	15.60%
Columbia Select Mid Cap Value Fund - Class R | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.10%
Columbia Select Mid Cap Value Fund - Class R | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.30%
Columbia Select Mid Cap Value Fund - Class R | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.70%
Columbia Select Mid Cap Value Fund - Class R | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.20%
Columbia Select Mid Cap Value Fund - Class R | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.10%
Columbia Select Mid Cap Value Fund - Class R | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.70%
Columbia Select Mid Cap Value Fund - Class R | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Select Mid Cap Value Fund - Class R | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.70%
Columbia Select Mid Cap Value Fund - Class R | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
Columbia Select Mid Cap Value Fund - Class R | Common Stocks [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.80%
Columbia Select Mid Cap Value Fund - Class R | Money Market Fund [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.20%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | AMETEK, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | CACI International, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.90%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Ingersoll Rand, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | ITT, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Marathon Petroleum Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Entergy Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Corning, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | D.R. Horton, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Reinsurance Group of America, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Welltower, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.90%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	15.60%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.10%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.30%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.70%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.20%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.10%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.70%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.70%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Common Stocks [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.80%
Columbia Select Mid Cap Value Fund - Institutional 3 Class | Money Market Fund [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.20%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | AMETEK, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | CACI International, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.90%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Ingersoll Rand, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | ITT, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Marathon Petroleum Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Entergy Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Corning, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | D.R. Horton, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Reinsurance Group of America, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Welltower, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.90%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	15.60%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.10%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.30%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.70%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.20%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.10%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.70%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.70%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Common Stocks [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.80%
Columbia Select Mid Cap Value Fund - Institutional 2 Class | Money Market Fund [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.20%
Columbia Select Mid Cap Value Fund Institutional Class | AMETEK, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Select Mid Cap Value Fund Institutional Class | CACI International, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.90%
Columbia Select Mid Cap Value Fund Institutional Class | Ingersoll Rand, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund Institutional Class | ITT, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund Institutional Class | Marathon Petroleum Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund Institutional Class | Entergy Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Select Mid Cap Value Fund Institutional Class | Corning, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund Institutional Class | D.R. Horton, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund Institutional Class | Reinsurance Group of America, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund Institutional Class | Welltower, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Columbia Select Mid Cap Value Fund Institutional Class | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.90%
Columbia Select Mid Cap Value Fund Institutional Class | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	15.60%
Columbia Select Mid Cap Value Fund Institutional Class | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.10%
Columbia Select Mid Cap Value Fund Institutional Class | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.30%
Columbia Select Mid Cap Value Fund Institutional Class | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.70%
Columbia Select Mid Cap Value Fund Institutional Class | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.20%
Columbia Select Mid Cap Value Fund Institutional Class | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.10%
Columbia Select Mid Cap Value Fund Institutional Class | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.70%
Columbia Select Mid Cap Value Fund Institutional Class | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Select Mid Cap Value Fund Institutional Class | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.70%
Columbia Select Mid Cap Value Fund Institutional Class | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
Columbia Select Mid Cap Value Fund Institutional Class | Common Stocks[IssueType] [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.80%
Columbia Select Mid Cap Value Fund Institutional Class | Money Market Funds[IssueType] [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.20%
Columbia Select Mid Cap Value Fund - Class C | AMETEK, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Select Mid Cap Value Fund - Class C | CACI International, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.90%
Columbia Select Mid Cap Value Fund - Class C | Ingersoll Rand, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Class C | ITT, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Class C | Marathon Petroleum Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Class C | Entergy Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Select Mid Cap Value Fund - Class C | Corning, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Class C | D.R. Horton, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Class C | Reinsurance Group of America, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Class C | Welltower, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Columbia Select Mid Cap Value Fund - Class C | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.90%
Columbia Select Mid Cap Value Fund - Class C | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	15.60%
Columbia Select Mid Cap Value Fund - Class C | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.10%
Columbia Select Mid Cap Value Fund - Class C | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.30%
Columbia Select Mid Cap Value Fund - Class C | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.70%
Columbia Select Mid Cap Value Fund - Class C | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.20%
Columbia Select Mid Cap Value Fund - Class C | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.10%
Columbia Select Mid Cap Value Fund - Class C | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.70%
Columbia Select Mid Cap Value Fund - Class C | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Select Mid Cap Value Fund - Class C | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.70%
Columbia Select Mid Cap Value Fund - Class C | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
Columbia Select Mid Cap Value Fund - Class C | Common Stocks [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.80%
Columbia Select Mid Cap Value Fund - Class C | Money Market Fund [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.20%
Columbia Select Mid Cap Value Fund - Advisor Class | AMETEK, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Select Mid Cap Value Fund - Advisor Class | CACI International, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.90%
Columbia Select Mid Cap Value Fund - Advisor Class | Ingersoll Rand, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Advisor Class | ITT, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Advisor Class | Marathon Petroleum Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Advisor Class | Entergy Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Select Mid Cap Value Fund - Advisor Class | Corning, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Advisor Class | D.R. Horton, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Advisor Class | Reinsurance Group of America, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Advisor Class | Welltower, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Columbia Select Mid Cap Value Fund - Advisor Class | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.90%
Columbia Select Mid Cap Value Fund - Advisor Class | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	15.60%
Columbia Select Mid Cap Value Fund - Advisor Class | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.10%
Columbia Select Mid Cap Value Fund - Advisor Class | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.30%
Columbia Select Mid Cap Value Fund - Advisor Class | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.70%
Columbia Select Mid Cap Value Fund - Advisor Class | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.20%
Columbia Select Mid Cap Value Fund - Advisor Class | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.10%
Columbia Select Mid Cap Value Fund - Advisor Class | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.70%
Columbia Select Mid Cap Value Fund - Advisor Class | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Select Mid Cap Value Fund - Advisor Class | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.70%
Columbia Select Mid Cap Value Fund - Advisor Class | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
Columbia Select Mid Cap Value Fund - Advisor Class | Common Stocks [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.80%
Columbia Select Mid Cap Value Fund - Advisor Class | Money Market Fund [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.20%
Columbia Select Mid Cap Value Fund - Class A | AMETEK, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	3%
Columbia Select Mid Cap Value Fund - Class A | CACI International, Inc., Class A [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.90%
Columbia Select Mid Cap Value Fund - Class A | Ingersoll Rand, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Class A | ITT, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Class A | Marathon Petroleum Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.80%
Columbia Select Mid Cap Value Fund - Class A | Entergy Corp. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.60%
Columbia Select Mid Cap Value Fund - Class A | Corning, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Class A | D.R. Horton, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Class A | Reinsurance Group of America, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.40%
Columbia Select Mid Cap Value Fund - Class A | Welltower, Inc. [Member]
Holdings [Line Items]
Percent of Net Asset Value	2.30%
Columbia Select Mid Cap Value Fund - Class A | Financial Services Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	18.90%
Columbia Select Mid Cap Value Fund - Class A | Industrial Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	15.60%
Columbia Select Mid Cap Value Fund - Class A | Consumer Discretionary Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	10.10%
Columbia Select Mid Cap Value Fund - Class A | Information Technology Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	9.30%
Columbia Select Mid Cap Value Fund - Class A | Real Estate Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.70%
Columbia Select Mid Cap Value Fund - Class A | Healthcare Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.20%
Columbia Select Mid Cap Value Fund - Class A | Utilities Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	8.10%
Columbia Select Mid Cap Value Fund - Class A | Materials Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	6.70%
Columbia Select Mid Cap Value Fund - Class A | Consumer Staples Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	5%
Columbia Select Mid Cap Value Fund - Class A | Energy Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	4.70%
Columbia Select Mid Cap Value Fund - Class A | Unclassified Sector [Member]
Holdings [Line Items]
Percent of Net Asset Value	3.40%
Columbia Select Mid Cap Value Fund - Class A | Common Stocks [Member]
Holdings [Line Items]
Percent of Net Asset Value	98.80%
Columbia Select Mid Cap Value Fund - Class A | Money Market Fund [Member]
Holdings [Line Items]
Percent of Net Asset Value	1.20%