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Columbia Small Cap Growth Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Summary of the Fund
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
Columbia Small Cap Growth Fund (the Fund) seeks long-term capital appreciation.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and members of your immediate family invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. (the Distributor). More information is available about these and other sales charge discounts and waivers from your financial intermediary, and can be found in the Choosing a Share Class section beginning on page 26 of the Fund’s prospectus, in Appendix A to the prospectus beginning on page A-1 and in Appendix S to the Statement of Additional Information (SAI) under Sales Charge Waivers beginning on page S-1.
    
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 56% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 56.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you and members of your immediate family invest, or agree to invest in the future, at least $50,000 in certain classes of shares of eligible funds distributed by Columbia Management Investment Distributors, Inc. (the Distributor). More information is available about these and other sales charge discounts and waivers from your financial intermediary, and can be found in the Choosing a Share Class section beginning on page 26 of the Fund’s prospectus, in Appendix A to the prospectus beginning on page A-1 and in Appendix S to the Statement of Additional Information (SAI) under Sales Charge Waivers beginning on page S-1.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] rr_ExpenseExampleHeading  Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
The following example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example illustrates the hypothetical expenses that you would incur over the time periods indicated, and assumes that:
■ you invest $10,000 in the applicable class of Fund shares for the periods indicated,
■ your investment has a 5% return each year, and
■ the Fund’s total annual operating expenses remain the same as shown in the Annual Fund Operating Expenses table above.
Class C shares’ 10-year cost examples below reflect the Class C Shares 8-Year Conversion Policy. Although your actual costs may be higher or lower, based on the assumptions listed above, your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
Under normal circumstances, the Fund invests at least 80% of its net assets (including the amount of any borrowings for investment purposes) in equity securities (including, but not limited to, common stocks, preferred stocks and securities convertible into common or preferred stocks) of companies that have market capitalizations in the range of the companies in the Russell 2000 Growth Index (the Index) at the time of purchase (between $9.4 million and $9.2 billion as of November 30, 2022). The market capitalization range and composition of companies in the Index are subject to change.
The Fund invests typically in common stocks of companies believed to have the potential for long-term, above-average earnings growth but may invest in companies for their short, medium or long-term prospects. The Fund may at times emphasize one or more sectors in selecting its investments, including the health care, industrials and information technology sectors. 
The Fund may invest up to 20% of its total assets in foreign securities. The Fund may invest directly in foreign securities or indirectly through depositary receipts. 
The Fund may invest in special situations, such as companies involved in initial public offerings, tender offers, mergers and other corporate restructurings, and in companies involved in management changes or companies developing new technologies. 
The Fund’s investment strategy may involve the frequent trading of portfolio securities. 
Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
An investment in the Fund involves risks, including Small-Cap Stock Risk, Market Risk, Growth Securities Risk, and Sector Risk, among others. Descriptions of these and other principal risks of investing in the Fund are provided below. There is no assurance that the Fund will achieve its investment objective and you may lose money. The value of the Fund’s holdings may decline, and the Fund’s net asset value (NAV) and share price may go down. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The significance of any specific risk to an investment in the Fund will vary over time depending on the composition of the Fund's portfolio, market conditions, and other factors. You should read all of the risk information below carefully, because any one or more of these risks may result in losses to the Fund. 
Active Management Risk. Due to its active management, the Fund could underperform its benchmark index and/or other funds with similar investment objectives and/or strategies. 
Convertible Securities Risk. Convertible securities are subject to the usual risks associated with debt instruments, such as interest rate risk and credit risk. Convertible securities also react to changes in the value of the common stock into which they convert, and are thus subject to market risk. The Fund may also be forced to convert a convertible security at an inopportune time, which may decrease the Fund’s return. 
Depositary Receipts Risk. Depositary receipts are receipts issued by a bank or trust company reflecting ownership of underlying securities issued by foreign companies. Some foreign securities are traded in the form of American Depositary Receipts and/or Global Depositary Receipts. Depositary receipts involve risks similar to the risks associated with investments in foreign securities, including those associated with an issuer’s (and any of its related companies’) country of organization and places of business operations, which may be related to the particular political, regulatory, economic, social and other conditions or events (including, for example, military confrontations and actions, war, other conflicts, terrorism and disease/virus outbreaks and epidemics) occurring in the country and fluctuations in such country’s currency, as well as market risk tied to the underlying foreign company. In addition, holders of depositary receipts may have limited voting rights, may not have the same rights afforded to stockholders of a typical domestic company in the event of a corporate action, such as an acquisition, merger or rights offering, and may experience difficulty in receiving company stockholder communications. There is no guarantee that a financial institution will continue to sponsor a depositary receipt, or that a depositary receipt will continue to trade on an exchange, either of which could adversely affect the liquidity, availability and pricing of the depositary receipt. Changes in foreign currency exchange rates will affect the value of depositary receipts and, therefore, may affect the value of your investment in the Fund. 
Foreign Securities Risk. Investments in or exposure to securities of foreign companies may involve heightened risks relative to investments in or exposure to securities of U.S. companies. Investing in securities of foreign companies subjects the Fund to the risks associated with an issuer’s (and any of its related companies’) country of organization and places of business operations, including risks related to political, regulatory, economic, social, diplomatic and other conditions or events (including, for example, military confrontations and actions, war, other conflicts, terrorism and disease/virus outbreaks and epidemics) occurring in the country or region, as well as risks associated with less developed custody and settlement practices. Foreign securities may be more volatile and less liquid than securities of U.S. companies, and are subject to the risks associated with potential imposition of economic and other sanctions against a particular foreign country, its nationals or industries or businesses within the country. In addition, foreign governments may impose withholding or other taxes on the Fund’s income, capital gains or proceeds from the disposition of foreign securities, which could reduce the Fund’s return on such securities. The performance of the Fund may also be negatively affected by fluctuations in a foreign currency's strength or weakness relative to the U.S. dollar, particularly to the extent the Fund invests a significant percentage of its assets in foreign securities or other assets denominated in currencies other than the U.S. dollar. 
Frequent Trading Risk. The portfolio managers may actively and frequently trade investments in the Fund's portfolio to carry out its investment strategies. Frequent trading of investments increases the possibility that the Fund, as relevant, will realize taxable capital gains (including short-term capital gains, which are generally taxable to shareholders at higher rates than long-term capital gains for U.S. federal income tax purposes), which could reduce the Fund's after-tax return. Frequent trading can also mean higher brokerage and other transaction costs, which could reduce the Fund's return. The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performance. 
Growth Securities Risk. Growth securities typically trade at a higher multiple of earnings than other types of equity securities. Accordingly, the market values of growth securities may never reach their expected market value and may decline in price. In addition, growth securities, at times, may not perform as well as value securities or the stock market in general, and may be out of favor with investors for varying periods of time. 
Issuer Risk. An issuer in which the Fund invests or to which it has exposure may perform poorly or below expectations, and the value of its securities may therefore decline, which may negatively affect the Fund’s performance. Underperformance of an issuer may be caused by poor management decisions, competitive pressures, 
breakthroughs in technology, reliance on suppliers, labor problems or shortages, corporate restructurings, fraudulent disclosures, natural disasters, military confrontations and actions, war, other conflicts, terrorism, disease/virus outbreaks, epidemics or other events, conditions and factors which may impair the value of an investment in the Fund. 
■ Small-Cap Stock Risk. Investments in small-capitalization companies (small-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies, and securities of small-cap companies may be less liquid and more volatile than the securities of larger companies. 
Market Risk. The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect the Fund’s ability to price or value hard-to-value assets in thinly traded and closed markets and could cause significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions. 
Preferred Stock Risk. Preferred stock is a type of stock that may pay dividends at a different rate than common stock of the same issuer, if at all, and that has preference over common stock in the payment of dividends and the liquidation of assets. Preferred stock does not ordinarily carry voting rights. The price of a preferred stock is generally determined by earnings, type of products or services, projected growth rates, experience of management, liquidity, and general market conditions of the markets on which the stock trades. The most significant risks associated with investments in preferred stock include issuer risk, market risk and interest rate risk (the risk of losses attributable to changes in interest rates). 
Sector Risk. At times, the Fund may have a significant portion of its assets invested in securities of companies conducting business within one or more economic sectors, including the health care, industrials and information technology sectors. Companies in the same sector may be similarly affected by economic, regulatory, political or market events or conditions, which may make the Fund more vulnerable to unfavorable developments in that sector than funds that invest more broadly. Generally, the more broadly the Fund invests, the more it spreads risk and potentially reduces the risks of loss and volatility. 
■ Health Care Sector. The Fund is more susceptible to the particular risks that may affect companies in the health care sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the health care sector are subject to certain risks, including restrictions on government reimbursement for medical expenses, government approval of medical products and services, competitive pricing pressures, and the rising cost of medical products and services (especially for companies dependent upon a relatively limited number of products or services), among others. Performance of such companies may be affected by factors including, government regulation, obtaining and protecting patents (or the failure to do so), product liability and other similar litigation as well as product obsolescence. 
■ Industrials Sector. The Fund is more susceptible to the particular risks that may affect companies in the industrials sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the industrials sector are subject to certain risks, including changes in supply and demand for their specific product or service and for industrial sector products in general, including decline in demand for such products due to rapid 
  technological developments and frequent new product introduction. Performance of such companies may be affected by factors including government regulation, world events, economic conditions and risks for environmental damage and product liability claims. 
■ Information Technology Sector. The Fund is more susceptible to the particular risks that may affect companies in the information technology sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the information technology sector are subject to certain risks, including the risk that new services, equipment or technologies will not be accepted by consumers and businesses or will become rapidly obsolete. Performance of such companies may be affected by factors including obtaining and protecting patents (or the failure to do so) and significant competitive pressures, including aggressive pricing of their products or services, new market entrants, competition for market share and short product cycles due to an accelerated rate of technological developments. Such competitive pressures may lead to limited earnings and/or falling profit margins. As a result, the value of their securities may fall or fail to rise. In addition, many information technology sector companies have limited operating histories and prices of these companies’ securities historically have been more volatile than other securities, especially over the short term. Some companies in the information technology sector are facing increased government and regulatory scrutiny and may be subject to adverse government or regulatory action, which could negatively impact the value of their securities. 
Special Situations Risk. Securities of companies that are involved in an initial public offering or a major corporate event, such as a business consolidation or restructuring, may be exposed to heightened risk because of the high degree of uncertainty that can be associated with such events. Securities issued in initial public offerings often are issued by companies that are in the early stages of development, have a history of little or no revenues and may operate at a loss following the offering. It is possible that there will be no active trading market for the securities after the offering, and that the market price of the securities may be subject to significant and unpredictable fluctuations. Certain “special situation” investments are investments in securities or other instruments that may be classified as illiquid or lacking a readily ascertainable fair value. Certain special situation investments prevent ownership interests therein from being withdrawn until the special situation investment, or a portion thereof, is realized or deemed realized, which may negatively impact Fund performance. Investing in special situations may have a magnified effect on the performance of funds with small amounts of assets. 
Risk Lose Money [Text] rr_RiskLoseMoney There is no assurance that the Fund will achieve its investment objective and you may lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund’s Class A share performance has varied for each full calendar year shown. The table below the bar chart compares the Fund’s returns (after applicable sales charges shown in the Shareholder Fees table in this prospectus) for the periods shown with a broad measure of market performance, as well as another measure of performance for markets in which the Fund may invest.
The performance of one or more share classes shown in the table below begins before the indicated inception date for such share class. The returns shown for each such share class include the returns of the Fund’s Class Inst shares for periods prior to its inception date. 
Except for differences in annual returns resulting from differences in expenses and sales charges (where applicable), the share classes of the Fund would have substantially similar annual returns because all share classes of the Fund invest in the same portfolio of securities. 
The after-tax returns shown in the Average Annual Total Returns table below are calculated using the highest historical individual U.S. federal marginal income tax rates in effect during the period indicated in the table and do not reflect the impact of state, local or foreign taxes. Your actual after-tax returns will depend on your personal tax situation and may differ from those shown in the table. In addition, the after-tax returns shown in the table do not apply to shares held in tax-advantaged accounts such as 401(k) plans or Individual Retirement Accounts (IRAs). The after-tax returns are shown only for Class A shares and will vary for other share classes. Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares. 
The Fund’s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future. Updated performance information can be obtained by calling toll-free 800.345.6611 or visiting columbiathreadneedleus.com. 
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and table show you how the Fund has performed in the past, and can help you understand the risks of investing in the Fund. The bar chart shows how the Fund’s Class A share performance has varied for each full calendar year shown. The table below the bar chart compares the Fund’s returns (after applicable sales charges shown in the Shareholder Fees table in this prospectus) for the periods shown with a broad measure of market performance, as well as another measure of performance for markets in which the Fund may invest.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 800.345.6611
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress columbiathreadneedleus.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund’s past performance (before and after taxes) is no guarantee of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Year by Year Total Return (%) as of December 31 Each Year*
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Best and Worst Quarterly Returns During the Period Shown in the Bar Chart Best 2nd Quarter 2020 47.53% Worst 4th Quarter 2018 -19.42%
Performance Table Heading rr_PerformanceTableHeading  Average Annual Total Returns After Applicable Sales Charges (for periods ended December 31, 2021)
Performance Table Does Reflect Sales Loads rr_PerformanceTableDoesReflectSalesLoads The table below the bar chart compares the Fund’s returns (after applicable sales charges shown in the Shareholder Fees table in this prospectus) for the periods shown with a broad measure of market performance, as well as another measure of performance for markets in which the Fund may invest.
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns shown in the Average Annual Total Returns table below are calculated using the highest historical individual U.S. federal marginal income tax rates in effect during the period indicated in the table and do not reflect the impact of state, local or foreign taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred In addition, the after-tax returns shown in the table do not apply to shares held in tax-advantaged accounts such as 401(k) plans or Individual Retirement Accounts (IRAs).
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown The after-tax returns are shown only for Class A shares and will vary for other share classes.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher Returns after taxes on distributions and sale of Fund shares are higher than before-tax returns for certain periods shown because they reflect the tax benefit of capital losses realized on the redemption of Fund shares.
Columbia Small Cap Growth Fund | Class A  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum deferred sales charge (load) imposed on redemptions (as a % of the lower of the original purchase price or current net asset value) rr_MaximumDeferredSalesChargeOverOther 1.00% [1]
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other expenses rr_OtherExpensesOverAssets 0.19%
Total annual Fund operating expenses rr_ExpensesOverAssets 1.24%
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
1 year rr_ExpenseExampleYear01 $ 694
3 years rr_ExpenseExampleYear03 946
5 years rr_ExpenseExampleYear05 1,217
10 years rr_ExpenseExampleYear10 1,989
1 year rr_ExpenseExampleNoRedemptionYear01 694
3 years rr_ExpenseExampleNoRedemptionYear03 946
5 years rr_ExpenseExampleNoRedemptionYear05 1,217
10 years rr_ExpenseExampleNoRedemptionYear10 $ 1,989
2012 rr_AnnualReturn2012 11.96% [2]
2013 rr_AnnualReturn2013 39.93% [2]
2014 rr_AnnualReturn2014 (5.59%) [2]
2015 rr_AnnualReturn2015 3.74% [2]
2016 rr_AnnualReturn2016 12.54% [2]
2017 rr_AnnualReturn2017 28.43% [2]
2018 rr_AnnualReturn2018 (2.33%) [2]
2019 rr_AnnualReturn2019 40.62% [2]
2020 rr_AnnualReturn2020 69.78% [2]
2021 rr_AnnualReturn2021 (2.92%) [2]
Year to Date Return, Label rr_YearToDateReturnLabel Year to Date return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2022
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (38.78%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 47.53%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.42%)
1 Year rr_AverageAnnualReturnYear01 (8.50%)
5 Years rr_AverageAnnualReturnYear05 22.33%
10 Years rr_AverageAnnualReturnYear10 16.82%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2005
Columbia Small Cap Growth Fund | Class Adv  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) imposed on redemptions (as a % of the lower of the original purchase price or current net asset value) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.19%
Total annual Fund operating expenses rr_ExpensesOverAssets 0.99%
1 year rr_ExpenseExampleYear01 $ 101
3 years rr_ExpenseExampleYear03 315
5 years rr_ExpenseExampleYear05 547
10 years rr_ExpenseExampleYear10 1,213
1 year rr_ExpenseExampleNoRedemptionYear01 101
3 years rr_ExpenseExampleNoRedemptionYear03 315
5 years rr_ExpenseExampleNoRedemptionYear05 547
10 years rr_ExpenseExampleNoRedemptionYear10 $ 1,213
1 Year rr_AverageAnnualReturnYear01 (2.70%)
5 Years rr_AverageAnnualReturnYear05 24.09%
10 Years rr_AverageAnnualReturnYear10 17.80%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Nov. 08, 2012
Columbia Small Cap Growth Fund | Class C  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) imposed on redemptions (as a % of the lower of the original purchase price or current net asset value) rr_MaximumDeferredSalesChargeOverOther 1.00% [3]
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other expenses rr_OtherExpensesOverAssets 0.19%
Total annual Fund operating expenses rr_ExpensesOverAssets 1.99%
Expenses Deferred Charges [Text Block] rr_ExpensesDeferredChargesTextBlock This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.
1 year rr_ExpenseExampleYear01 $ 302
3 years rr_ExpenseExampleYear03 624
5 years rr_ExpenseExampleYear05 1,073
10 years rr_ExpenseExampleYear10 2,123
1 year rr_ExpenseExampleNoRedemptionYear01 202
3 years rr_ExpenseExampleNoRedemptionYear03 624
5 years rr_ExpenseExampleNoRedemptionYear05 1,073
10 years rr_ExpenseExampleNoRedemptionYear10 $ 2,123
1 Year rr_AverageAnnualReturnYear01 (4.50%)
5 Years rr_AverageAnnualReturnYear05 22.85%
10 Years rr_AverageAnnualReturnYear10 16.62%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2005
Columbia Small Cap Growth Fund | Class Inst  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) imposed on redemptions (as a % of the lower of the original purchase price or current net asset value) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.19%
Total annual Fund operating expenses rr_ExpensesOverAssets 0.99%
1 year rr_ExpenseExampleYear01 $ 101
3 years rr_ExpenseExampleYear03 315
5 years rr_ExpenseExampleYear05 547
10 years rr_ExpenseExampleYear10 1,213
1 year rr_ExpenseExampleNoRedemptionYear01 101
3 years rr_ExpenseExampleNoRedemptionYear03 315
5 years rr_ExpenseExampleNoRedemptionYear05 547
10 years rr_ExpenseExampleNoRedemptionYear10 $ 1,213
1 Year rr_AverageAnnualReturnYear01 (2.67%)
5 Years rr_AverageAnnualReturnYear05 24.11%
10 Years rr_AverageAnnualReturnYear10 17.80%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Oct. 01, 1996
Columbia Small Cap Growth Fund | Class Inst2  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) imposed on redemptions (as a % of the lower of the original purchase price or current net asset value) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.08%
Total annual Fund operating expenses rr_ExpensesOverAssets 0.88%
1 year rr_ExpenseExampleYear01 $ 90
3 years rr_ExpenseExampleYear03 281
5 years rr_ExpenseExampleYear05 488
10 years rr_ExpenseExampleYear10 1,084
1 year rr_ExpenseExampleNoRedemptionYear01 90
3 years rr_ExpenseExampleNoRedemptionYear03 281
5 years rr_ExpenseExampleNoRedemptionYear05 488
10 years rr_ExpenseExampleNoRedemptionYear10 $ 1,084
1 Year rr_AverageAnnualReturnYear01 (2.61%)
5 Years rr_AverageAnnualReturnYear05 24.23%
10 Years rr_AverageAnnualReturnYear10 17.95%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Feb. 28, 2013
Columbia Small Cap Growth Fund | Class Inst3  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) imposed on redemptions (as a % of the lower of the original purchase price or current net asset value) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets none
Other expenses rr_OtherExpensesOverAssets 0.04%
Total annual Fund operating expenses rr_ExpensesOverAssets 0.84%
1 year rr_ExpenseExampleYear01 $ 86
3 years rr_ExpenseExampleYear03 268
5 years rr_ExpenseExampleYear05 466
10 years rr_ExpenseExampleYear10 1,037
1 year rr_ExpenseExampleNoRedemptionYear01 86
3 years rr_ExpenseExampleNoRedemptionYear03 268
5 years rr_ExpenseExampleNoRedemptionYear05 466
10 years rr_ExpenseExampleNoRedemptionYear10 $ 1,037
1 Year rr_AverageAnnualReturnYear01 (2.54%)
5 Years rr_AverageAnnualReturnYear05 24.28%
10 Years rr_AverageAnnualReturnYear10 17.99%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Jul. 15, 2009
Columbia Small Cap Growth Fund | Class R  
Risk/Return: rr_RiskReturnAbstract  
Maximum sales charge (load) imposed on purchases (as a % of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum deferred sales charge (load) imposed on redemptions (as a % of the lower of the original purchase price or current net asset value) rr_MaximumDeferredSalesChargeOverOther none
Management fees rr_ManagementFeesOverAssets 0.80%
Distribution and/or service (12b-1) fees rr_DistributionAndService12b1FeesOverAssets 0.50%
Other expenses rr_OtherExpensesOverAssets 0.19%
Total annual Fund operating expenses rr_ExpensesOverAssets 1.49%
1 year rr_ExpenseExampleYear01 $ 152
3 years rr_ExpenseExampleYear03 471
5 years rr_ExpenseExampleYear05 813
10 years rr_ExpenseExampleYear10 1,779
1 year rr_ExpenseExampleNoRedemptionYear01 152
3 years rr_ExpenseExampleNoRedemptionYear03 471
5 years rr_ExpenseExampleNoRedemptionYear05 813
10 years rr_ExpenseExampleNoRedemptionYear10 $ 1,779
1 Year rr_AverageAnnualReturnYear01 (3.17%)
5 Years rr_AverageAnnualReturnYear05 23.48%
10 Years rr_AverageAnnualReturnYear10 17.21%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Sep. 27, 2010
Columbia Small Cap Growth Fund | returns after taxes on distributions | Class A  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (11.11%)
5 Years rr_AverageAnnualReturnYear05 17.82%
10 Years rr_AverageAnnualReturnYear10 12.09%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2005
Columbia Small Cap Growth Fund | returns after taxes on distributions and sale of Fund shares | Class A  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (3.93%)
5 Years rr_AverageAnnualReturnYear05 16.19%
10 Years rr_AverageAnnualReturnYear10 11.74%
Share Class Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 2005
Columbia Small Cap Growth Fund | Russell 2000 Growth Index (reflects no deductions for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 2.83%
5 Years rr_AverageAnnualReturnYear05 14.53%
10 Years rr_AverageAnnualReturnYear10 14.14%
Columbia Small Cap Growth Fund | Russell 2000 Index (reflects no deductions for fees, expenses or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.82%
5 Years rr_AverageAnnualReturnYear05 12.02%
10 Years rr_AverageAnnualReturnYear10 13.23%
[1] This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
[2] Year to Date return as of September 30, 2022: -38.78%
[3] This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.